HP CJJ 5 troubleshooting

Color LaserJet

Troubleshooting

Guide

C3100A / C3961A / C3962A

Contains Procedures to resolve specific problems

and actual Faults that have occured in the field on

the CLJ and CLJ5 printers.

Pink Book

Revision 14.02

24/07/97

Bob Edwards

UK Support Planning

Note:

The Colour LJ section was previously contained within the Laser - HP5000 -

C30/C40D Troubleshooting Guide book, Volume 2, Sept 1995 Revision 13,

also known as Pink Book 2. This document supersedes all previous revi-

sions of this Color LJ section

The information contained within this document is subject to change with-

out any prior notice.

This document is aimed for the use of HP Customer Engineers, HP Call

Qualification, HP Technical Support or bona-fide agents and contractors

who work with this product. For those Non-HP employees, they will have to

sign a non disclosure agreement with HP before they receive a copy of this

document.

No part of this document can be photocopied, reproduced, or translated

without prior consent of the Hewlett-Packard Company.

Editor:

Bob Edwards, UK Support Planning Team

Revision 14, 03/06/97

1st update

02/07/97 (14.01)

2nd Update

24/07/97 (14.02)

The CLJ / CLJ5 Troubleshooting Manual

Contents Page

1-1

Page No

Description

1-2

General Information

Color LJ Commandments

p 1-2

Feature Comparsions

p 1-3

Service Notes Index

p 1-4

Technical Tips

p 1-4

Procedure for Replacing Formatter Boards

p 1-6

Test Files for Print Defects

p 1-8

Software Cures for Small Pitch Banding

p 1-9

Drum Installation Guide

p 1-13

NVRAM - Only Available through CCD Team

p 1-13

Printer Maintenance

p 1-15

Consumables Compatibility Matrix

p 1-16

Consumables Not Covered Under Warranty

p 1-17

2-1

Faults with Error Numbers

54.3 Toner Concentration Troubleshooting Process

p 2-5

Error 79 (xxxx) Service Faults / Information

p 2-8

3-1

Miscellaneous problems

4-1

Print Quality Problems

Faint/Faded/Washed-out Fault Isolation

p 4-1

Colour Fault Troubleshooting Isolation

p 4-1

Bands / Lines In Scan Direction

p 4-5

Bands / Lines In Paper Path Direction

p 4-8

Smeared Print Problems

p 4-12

Mottled / Speckled / Ring-Marks

p 4-14

Image Skew / Registration / Margin Problems

p 4-17

Wavy Text and Images problems

p 4-20

Miscellaneous Colour Defect Problems

p 4-21

5-1

Paper Path Problems

C3119A RFU Paper Path Problems

p 5-4

6-1

PostScript Problems

7-1

Index

A-1

Front Panel Error Codes & Messages

Subject: Color LaserJet Service Commandments

HP Security level: HP Internal

Color LaserJet Service

Commandments

Thou shalt not swap:

Fused Consumables

Drum Cartridge

Developers

Transfer Assemblies

Fusers

Coating Kits

NVRAMs

Formatters

Control Boards

Feed Rollers

Thou shalt always confirm the User Maintenance has been done properly.

Thou shalt always train the users in proper User Maintenance procedures.

Thou shalt never permit the use of re-fed or out of spec media, including labels.

Thou shalt not invert the drum cartridge.

Thou shalt not change the paper feed rollers.

Thou shalt always carry and use the complete CLJ Service Manual.

Thou shalt always diagnose, confirm the diagnosis, then repair the printer.

Thou shalt not make any unauthorized adjustments.

Thou shalt always use a sealing kit and proper packaging when shipping the printer.

Thou shalt never ship the printer with the developers installed.

This guide is meant to advise that "throwing parts" at Color LaserJets invaribly does not

resolve your problems. It may seemingly clear the problem for a short time, but it will

surely return. Use this book to help you troubleshoot your problems, especially in the Print

Quality area's.

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CLJ / CLJ5 Feature Comparison

HP PCL Printers

HP Color LJ

HP Color 5/5M

C3100A

C3961A/C3962A

Intro Date

Sept 94

March 96

Engine

LP-7010

Processor

20Mhz AMD 29030

40Mhz AMD 29040

RISC with Cache

Print Speed (ppm)

10 ppm (Mono)

2 ppm Colour

1st Page out (sec)

<25 Mono

<42 Colour

Duty Cycle (pgs/m)

15,000

30,000

Warranty

1 yr on-site

Pgs / Toner Bottle

2200 pages

3000 pages

@ 5% coverage

Resolution

300dpi

Std Printer Language

Enh PCL5 with

Colour

Std Memory

8Mb & MEt

20Mb & MEt

Max Memory

72Mb (4 SIMM

84Mb (4 SIMM

slots)

Duplex Printing

No Duplexing

Std Interfaces

1 x IEEE 1284 Bi-di

MIO

Auto-Switch

Color LaserJet / Color LJ5/5M

Service Notes up to April 97

C3100A-01

Troubleshooting tips for 54.4 Engine Error.

C3100A-02

Service Manual Corrections

C3100A-03

Control PCA's shipped with NVRAM installed in engine ROM socket.

C3100A-04

Pinched Harness in Power Supply Drawer area.

C3100A-05

Toner Hopper Gear Cluster Damage?

C3100A-06

Evaluation of Shipping Damage at Customers Site.

C3100A-07

54.3 Toner Concentration Error

C3961A-01

Potential Failure of Developer Drive Assy (110v Only)

C3119A-01

Rear Feed Unit for the HP Colour LaserJet

Technical Tips

1. Consumable Units or User-Replaceable Maintenance Units.

All maintenance consumable units with the exception of the Toner Collection kit

have fusible links. When a new consumable is installed the printer senses its fusible link

and blows its fuse. The Control board then resets the counter for that maintenance unit to

zero. When the developers or print drum are replaced the Control board restarts the page-

dependent FW algorithms which controls the operating point. Also, when the Print Drum is

replaced, the drum winding Sensor is calibrated.

The fusible links and associated FW algorithms affect service and troubleshooting

strategy as follows:

* The Maintenance unit can NOT be removed and used as a new unit in another printer.

* If a new maintenance unit is installed the Control Board resets its counter and

determines the optimum operating point for the installed unit. If another unit with

no fusible link (such as a Print Drum or Developer from another printer) is installed,

the operating point WILL NOT be correct. This is critical for the Print Drum and

Developers.

When using known good maintenance units for troubleshooting purposes

ENSURE the original is always returned. DO NOT LEAVE A TEST UNIT INSTALLED.

Use the following procedure with the different maintenance units.

1a. Print Drum Assy Consumable

A test drum which has a fusible link already blown can be installed to verify repetitive

print defect failures. Do NOT print more than 50 pages with this test drum. It may cause

13.1 CLEAR DRUM WINDING JAMS. If this occurs use Service mode Statue/Test ad-

dress 47 to calibrate the Drum Winding sensor. It is necessary to recalibrate this sensor

when reinstalling the original drum. Do not leave test print drum installed after trouble-

shooting

1b.Developer Assy Consumable

A test Developer which has a fusible link already blown can be installed to verify

print problems such as white lines. Do NOT print more than 50 pages with this test devel-

oper. Always reinstall original unit, do not leave test developer installed after

troubleshooting.

1-4

1-5

1c. Transfer Belt, Fuser & Coating Pads Assy Consumable

A test units which has a fusible link already blown can be installed to verify print

defects. Do NOT print more than 200 pages with these test units. Always reinstall

original unit, do not leave test developer installed after troubleshooting.

2. LaserJets and Camera-Ready Work

It is up to the customer to decide on the suitability of a LaserJet for Camera-Ready

work. They MUST decide whether the LaserJet meets their needs. Some may find it does

meet their needs, whilst other with more stringent criteria may not. Camera-ready work

may highlight problems with small white voids or holes in black areas or perhaps

amplify skew problems, etc. HP does NOT recommend or discourage LaserJets used

for this type of work, but leaves it to the customer to decide on suitability of this

printer for this type of work.

2a. Character Voids & Camera-Ready Work

The Toner The toner and printing process of HP LaserJet printers has been

optimized for printing on standard photocopier media. When other types of Media such

as transparencies, bond paper, laid or linen papers, or other nonstandard types of medias

are used, some degradation of print quality may occur.

Tiny gaps may appear throughout the print. These character voids occur be-

cause some print media does not accept the transfer of toner as well as other. Paper is a

substance consisting of many different types of materials. It DOES NOT have a com-

pletely consistent finish. If you magnify a piece of paper you will see that the surface is

uneven. This uneven surface lends itself to character voids. These voids are usu-

ally not seen unless viewed under a magnification in camera ready or typeset environ-

ments. Although LaserJet printers are not supported in these environments it is impor-

tant to provide the best print quality possible.

Character voids may appear even when all of Hewlett-Packards specifications are

followed. To minimize the occurrence of character voids, try to avoid medias with

rough surfaces. Use medias that are within Hewlett-Packards specifications, refer to

user manual for these. If the surface is too rough the surface will consist of large incon-

sistencies. If the surface is too smooth, the toner will not adhere too well to it.

Adjusting the print density may effect the severity of character voids. This is

dependent on what type of media is being used. (Hans Hjertquiste, Boise Division,

May 1997)

3. Banding on LaserJets (Faint Horizontal Lines on LJ O/P)

When printing with a HP LJ the toner is applied across the page in horizontal

strips. The page is moved through the printer and toner is continually applied. When

printing text, or black pages a large amount of toner is deposited on the page. As the

amount of toner deposited on the page decreases, slight speed variations become more

apparent. As the resolution (dpi) and the speed (ppm) both increase, a variation in print

pattern intensity, caused by minor drum speed changes, may appear. These variations in

pattern intensity may appear on the page as lines or bands.

The bands are more visible in certain gray-scale patterns. By varying the patterns

you can decrease the amount of banding that can occur. These bands are more apparent

at high resolution. If the resolution is decreased from 600dpi to 300dpi the bands will

become less noticable.

All LJs have the potential for printing bands in grey-scale patterns. High speed

printers, that are capable of printing high resolutions gray-scale patterns, are more likely

to display these pattern variations. Changing the gray-scale or reducing the resolution

may significantly reduce the amount of banding that can occur. (Hans Hjertquiste,

Boise Division, May 1997)

4. Subject: Procedures for Replacing Formatter

HP Security level: HP Internal (HP Company Confidential)

Color LaserJet 5 / 5M

Technical Update

May 30, 1996

Author: Tony Barrett, LaserJet Technical Marketing

Situation:

WHEN INSTALLING A REPLACEMENT FORMATTER, IT IS MANDATORY

TO PERFORM THE FOLLOWING STEPS TO ENSURE THE PRINT QUAL-

ITY OF THE COLOR LASERJET 5 PRINTER.

Preparation:

If possible, print an Error Log and Self Test before removing the original Formatter.

The printed values will be useful later in this procedure. To print the Error Log, power

on the printer while holding down ?Form Feed?. When ?00 ERROR LOG READY? is

displayed, take the printer off-line, then press menu several times until ?ERROR

LOG? is displayed. Press ?Enter? to print the Error Log. Retain the printouts for future

reference.

A. Open the top of the printer and record the Drum Sensitivity Value (on the bar code

label) located on the right side of the Drum Cartridge behind the display.

B. Divide this number by 16 and save the integer value for address 69, the remainder

will be

used for address 71. (Example - Value of 104 on the Drum Sensitivity

Label, 104/16 = 6

with a remainder of 8 (Don't use 6.5). Use the value ?6? for

address 69, and the value ?8? for address 71.

NOTICE: Entering the drum number per this procedure DOES NOT permit the ex-

change of print drum cartridges between printers because it does not correct the photo

conductor age compensation and drum winding jam sensor calibration data. Do Not

attempt to exchange maintenance assemblies between Color LaserJet printers.

Access to Service Mode:

1. Holding ?On Line?, ?Form Feed? and ?Item? keys down, power the CLJ5 Printer

ON.

2. Wait until all LEDs are lighted at the same time, release. Press 'Item', then ?Enter?.

?SERVICE MODE? will display on screen, then will go into ? 05 INTERNAL SELF

TEST?, ?Warming Up? mode.

3. Set printer ?Off Line?.

Accessing Extended Service Mode to Update New Formatter with Drum Sensitivity

Value: CAUTION ! Extended Service Mode allows you to enter any value into any

1-6

NVRAM address. Use extreme care entering values in this Mode.

(This procedure WILL NOT update the Drum Number printed on the Self Test on a Classic

Color LaserJet (C3100A) Printer, but it will correct the operating parameters in engine

NVRAM.)

4. Press ?Menu? until 'ENGINE SERVICE, REGISTER ADJUST' is displayed.

Note: The following step can be tricky. Feel free to experiment with the time delay between

releasing ?Enter? and pressing ?Menu? and ?Item?.

5. Press ?Enter? and release, then press ?Menu? and ?Item? keys simultaneously, within 1/

2 to 1 second of the ?Enter?. Release. ?Enter Address 000? will be displayed.

Note: The ?On Line? key increments the 100s digit, the ?Form Feed? key increments the

10s digit, and the ?Reset? key increments the 1s digit.

6. Press the 'Form Feed' key until the display reads '060', then press the 'Reset' key until the

display reads '069'. (If you overshoot the desired number, continue pressing until it comes

around again.)

7. Press ?Enter? to display the value in address 069. The value displayed will be between 1

& 9. Use the 'Reset' key to change the value. (Value '6' in the example.) It may not always

be necessary to change the displayed value. If ?INVALID ADDRESS? is displayed, the

printer is not in Extended Service Mode. Set the power switch to Stand-by (out, fans may

run) and start over at step 1.

8. Press ?Enter? after the appropriate value is displayed, then only the '069' will show on

panel. Press ?Enter? again to confirm the correct value was entered, then press ?Enter?

again.

9. Press 'Form Feed' to change the '6' to a '7', and press ' Reset ' to change the '9' to a '1'.

10. Press ?Enter? to display the value in address 71. Use the 'Reset' key to change the value

to the one computed from the Drum Sensitivity Number. (Value '8' in the example) Again,

it may not always be necessary to change the displayed value.

11. Press ?Enter? after the appropriate value is displayed, then only the '071' will show on

panel. Press ?Enter? again to confirm the correct value was entered, then press ?Enter?

again.

12. Power OFF the Printer.

Verifying ?Cold Reset Default Paper Size? is Correct:

1. Perform steps 1 through 3 of ?Access to Service Mode?.

2. Press ?Menu? key until 'SM CONFIG Menu? is displayed.

3. Press ?Item? once to verify the correct ?COLD Reset? (CR) default paper size is dis-

played, followed by an asterisk. If the wrong size is displayed, use the ?+? and ?-? keys to

select the correct value. Press ?Enter? to complete the selection (asterisk is displayed).

4. Press 'Item' key until 'SM CONFIG Menu, SN=JPXDXXXXXX' is displayed. The 1st,

2nd and 4th character are fixed, all others can be changed by pressing the '+' or '-' key to

display the appropriate value. Press ?Enter? after each character to advance to next charac-

1-7

ter.

5. Power OFF' the Printer.

6. Press ?On Line? while turning ON the printer.

7. Release ?On Line? when all 4 control panel lights are on. The display will read ?08

COLD Reset?.

8. The Cold Reset is complete when the display reads ?05 SELF TEST?.

9. Restore all non-default user menu items per the user's preferences as listed on the Self

Test page printed with the original Formatter.

10. Print a Self Test and verify all the user menu settings, the drum number, and the

serial number are correct.

HP Company Proprietary Retain These Instructions For Future Reference C3960-00010

5. Subject: Test Files for Print Defects

HP Security level: HP Internal

Color LaserJet 5 / 5M

Technical Update

May 29, 1996

Author: Harold Orien, LaserJet Technical Marketing

Situation:

A number of print defects reported by customers can be detected or quantified if

the attached files are used properly when diagnosing the reported failure. Attached

are 7 test files. The description for their use follows below.

Solution:

· The file labelled "MKLGEAR.150" is designed for highlighting and quantifying small

pitch banding. These bands appear as vertical lines when the print-out is viewed in

portrait mode.

· The files labelled "CYN_DITH.150", "BLK_DITH.PRN", "YEL_DITH.150 and

"MAG_DITH.150" are designed to highlight what customers usually call "streaking".

Streaks are usually whitish bands that appear horizontal on the page as it is viewed in

portrait mode. The files will also highlight 18mm vertical banding. These four files are

dithered prints of cyan, black, yellow and magenta respectively.

· The files labelled "C_HCOLOR.150" and "C_VCOLOR.150" print out a set of vivid

horizontal and vertical stripes respectively. They are valuable for detecting contaminates

of the developer. Developer contaminates can produce white lines and ringmark on the

print-outs.

Please note: These files may be helpful in determining whether or not a given customer

printer is operating within our printing specifications.

· They are to be used by HP personnel in their trouble shooting efforts. They are not to

be widely distributed nor to be given to customers except on a very controlled and

limited basis. If you have questions regarding the confidentiality of these files please

contact CCD technical marketing.

HP Company Confidential ? Not to be given to customers, contact your local RCE

for a copy.

1-8

6. Subject: Software Cures for Small Pitch Banding

HP Security level: HP Internal

Software Cures for Small Pitch Banding

By Sylvia Cohen

CCD Technical Marketing

Situation:

Small Pitch Banding (SPB) definition: Visible lines, vertical with the page in portrait

orientation, horizontal in landscape orientation, of varying color or wazzu intensity with

less than 2 mm spacing. There are other forms and causes of banding, usually character-

ized by the average spacing between repeating dark or light lines. Banding caused by the

intensity or shade of color

increasing and decreasing gradually on an approximately 19 mm pitch is known as

Medium Pitch Banding and is usually caused by one or more developers, or slipping

developer drive clutch(s). Large Pitch Banding shows up as lines that appear perhaps

only once or twice per page. This document only deals with Small Pitch Banding (SBP).

There are many factors involved in the SPB issue: Whenever a user complains about

SPB, the printer hardware is the first to be blamed. It's not only the hardware that can

affect the SPB, there are adjustments in the software that can be made to decrease SPB.

SPB issues have been resolved by minor adjustments to the driver and / or software

settings. In the vast majority of cases, the hardware is fine.

The four areas that will be focused in this document are:

Driver Settings

Software Applications

Color Used

Color Gradients

A user will be more likely to see SPB in printouts with large area fills than in a printout

with a lot of small detail. Also, one is likely to see SPB in the lighter colors such as skin

tones. Another place one might see SPB is in gradients going from black to a very light

color

Driver Settings

First, make sure the customer is using the correct driver.

Windows 3.1 PostScript driver - Ver.3.0.1

Windows 95 PostScript driver - Ver. 4.1

Windows 3.1 and Windows 95 PCL driver - Ver. 1.3

Windows NT 3.51 PCL driver - Ver. 1.3

Windows NT 3.51 PostScript driver - Ver 3.5

Windows NT 4.0 PostScript driver - Ver. 4.00

MAC PostScript driver. Ver. 8.3.1

GX - Ver. 1.0

OS/2 PCL driver - Ver. 30.46.0

OS/2 PostScript driver - Ver. 30.501

Asian Windows 3.1 and Windows 95 PCL drivers - Ver. 1.3

NOTE: There is no HP PCL driver for NT 4.0 at this time. This driver will be available

1-9

approximately March 31, 1997.

The color control settings in the driver can help decrease the incidence of SPB unless such

banding is caused by a hardware malfunction. Always make sure the user performs the

cleaning steps in the Users Manual. The next step is to try different settings in the driver. For

instance, if a user has the driver set to Vivid Color, with a halftone setting of Detail, try

printing the image with the halftone setting of Smooth or even Basic. Using Smooth or Basic

settings do not necessarily mean that the resulting print will lack detail. The names of the

settings should not be taken too literally.

Remember, a file can contain up to three different object types in a file: Text, graphics and

photo. The settings will need to be adjusted for a particular type of object on the page. An

object imported into a file as a bitmap is treated as a photo. Text in the document is treated

as text, unless it is imported as a bitmap, and graphics (bar charts, boxes, etc.) treated as

graphics. Sometimes what you think is a graphic is treated as a photo. Try changing the

various settings to lessen the SPB. It works a good percentage of the time.

The default settings for each type of object are as follows in the ColorSmart Automatic

Setting::

Text: Vivid Color, Detail

Graphics: Vivid Color Smooth

Photos: Screen Match, Smooth

Vivid Color

The Printer automatically chooses bright, vivid colors, which is the best option to use for

print text and business graphics. This option boosts the saturation of colors. Colors printed

using the vivid color will be bright and saturated. Depending on the color that is being

printed and the halftone setting being used, you could see some Small Pitch Banding here.

Screen Match

The printer attempts to match the printed output to the colors displayed on the monitor. This

option matches the output of a Sony Trinitron monitor. Colors printed in this setting will be

much lighter and less saturated than colors printed with vivid color. This is a setting where

Small Pitch Banding is likely to occur.

No Adjustment

The printer does not alter the original colors specified by the application. It sends the appli-

cations color information directly to the printer.

The halftone settings will have more of an effect in Small Pitch Banding than the color

settings. There are three different halftoning settings in the driver: Detail, Smooth, and Basic.

Don't be misled by the labels. Picking Smooth, or 150 lpi, DOES NOT necessarily mean

that the resulting image will lack detail! More (300 vs. 150 lpi) is not always better!

Detail (300 lpi)

Sometimes (depending on source file resolution and processing) produces a sharper image

than the Smooth option. Use this setting, along with the Vivid color treatment for crisp clear

text.

1-10

This setting in a large fill area such as graphs and in lighter background fills will increase

the incidence of Small Pitch Banding.

Smooth (150 lpi)

Use the Smooth option for graphics that require an even distribution of color. One is less

likely to see Small Pitch Banding using this setting, but again it depends on the application.

Basic (100 lpi)

Use the Basic option to produce simple graphics that have large areas of a single color.

Applications

Different applications send color data differently to the printer. The very most important

thing to remember is to make sure the user is using RGB mode in the application. Yes!

RGB! If CYMK data is sent to the printer the Formatter performs a double conversion. The

resulting rounding errors can cause Small Pitch Banding and color shifts. Applications like

Adobe Photoshop and PageMaker allow the user to specify RGB mode.

Corel Draw does not do such a good job sending color data to our printer. For instance, if

you draw a block of 100% magenta (Red 255, Green 0 and Blue 255) in Corel Draw and

print it using graphics, screen match, detail setting, under microscopic

examination you will see lines of cyan pixels mixed in with the magenta, which will give

the appearance of Small Pitch Banding. Printing the block with the graphics, screen match,

smooth setting, lessens the banding. Printing that same block with the graphics, screen

match, basic setting, turns the magenta almost purple. If that band is printed using the

automatic setting, you will get a nice dark fully saturated magenta with no banding.

Now, if you print that same image in PageMaker using the 100% magenta (Red 255, Green

0, and Blue 255) in graphics, screen match, detail, you might see some Small Pitch Band-

ing. If printed using screen match, smooth, there is virtually no banding. The magenta prints

a purer magenta in PageMaker than in Corel Draw. Being able to compare how two applica-

tions print is another way of testing that there is nothing wrong with the printer.

If after printing a photo loaded from a Photo CD into an application such as Photoshop ,

there is excessive Small Pitch Banding, one way to eliminate it is to click on ?Image? in the

menu bar, then click on adjust, auto levels. When you do this, make sure you are Lab Color

Mode. This will affect the contrast, but not the color. Note: Prior to printing the image,

switch back to RGB Mode.

Colors

Lighter colors such as skin tones or pastels are more likely to show Small Pitch Banding. In

those colors, you may want to change the halftone setting in the driver. Smooth is usually a

good bet, but if that does not work try using the basic setting.

If using the settings in the driver does not produce the desired results in printing magenta in

an application like Corel Draw, the user will have better results by using the Pantone Color

Swatches or the Pantone Color Palette to pick the shade magenta that will less likely show

Small Pitch Banding.

Gradient Backgrounds

Printing gradients seems to be a challenge with the CLJ5. Try lightening the darker color or

1-11

pick another color if acceptable. The best driver setting to use for gradient is graphics,

screen match, basic.

As you can see, there are many factors that can affect banding:

Printer Hardware

Driver Settings

Software applications

The color used

Gradients

Before swapping parts in the printer, try using some of these tips. We have been able to

solve many Small Pitch Banding problems by making sure the user is using the correct

driver and changing some of the driver and application settings.

ESCALATING A BANDING PROBLEM THAT YOU SUSPECT IS SOFTWARE:

If changing the software fails to yield adequate results, then print the MLKGEAR file to

isolate possible printer problems and escalate to the your local RCE if you suspect it is a

software problem.

Information the Nest will need when you escalate the problem:

Along with the MLKGEAR print samples, please provide a RCE/SSE with the follow-

ing information:

Operating System and Version

Application and Version

Driver and Version

Electronic copy of the file showing the problem

Print to file copy of the file showing the problem

Print samples showing the banding

(The files can be sent E-Mail or on a Floppy along with the print samples)

PLEASE ensure that all print sample packages are clearly labelled with your name and

contact information and send to your local RCE. This will then be forwarded on to Boise LJ

Division to ascertain if test is within specification.

This is Company Confidential please contact your local support

before attempting to share this with your customer.

1-12

7. Subject: Getting Started Guide - Drum Cartridge Installation

HP Security level: HP Internal

Color LaserJet 5 / 5M

Technical Update

March 20, 1996

Author: Harold Orien, LaserJet Technical Marketing

Situation:

The HP Color LaserJet 5/5M ?Printer Getting Started Guide? (HP part-number: C3961-

90901, shipped with the printer) contains incorrect instructions for initial setup of the

printer.

In step ?D --Prepare and Maintain Your Printer?, customers are instructed to lower the

drum cartridge in preparation for cleaning the optics glass. This is done prior to the

printer being powered on. Before the printer is powered on, a small lever on the left-

hand side above the drum cartridge is in a ?down? or ?engaged? position. (This lever

causes the cleaning blade in the drum cartridge to retract.) This lever makes it difficult

for customers to re-seat the drum cartridge after cleaning the optics glass. Customers

may try to slam the drum cartridge into place causing both frustration and potential

damage to the drum.

Solution:

It is important that customers wait to perform Step ?D? until after they have completed

step ?J - Test Printer Operation.? After customers have completed step ?J? the lever

mentioned above will retract and the drum cartridge will be much easier to re-seat.

An errata sheet has been taped to the front of the ?Getting Started Guide? covering this

change.

If customers have incorrectly performed Step ?D? prior to Step ?J? and are having

difficulty re-seating the drum cartridge, it is possible to seat the drum cartridge without

slamming it.

· While facing the printer raise the drum cartridge up to its ?seated? position.

· Push firmly on the front of the cartridge (best if both thumbs are positioned on the

front of the drum cartridge.)

· While pushing back on the front of the cartridge, lift slightly in order to get the drum to

lock into place.

8. Subject: Color LaserJet 5/5M NVRAM

HP Security level: HP Internal

Color LaserJet 5/5M NVRAM

ONLY AVAILABLE THROUGH CCD TM

Nine times out of ten, normal operation can be restored by re-entering the correct

data through the front panel of the printer. NO PARTS ARE REQUIRED!

1-13

Critical calibration data is only stored in the original NVRAM, and no where else on

Earth.

Service Parts are supplied with no data and must be initialized and reprogrammed.

Reprogramming procedure is extremely complex requiring considerable skill, experi-

ence, and judgment to minimize costs and latent failures.

If an NVRAM problem is suspected, contact CE Tech Assist or Tech Support immedi-

ately!

8. Subject: No "Continue" Function

HP Security level: HP Internal

Color LaserJet 5 / 5M

Technical Update

April 16, 1996

Author: Harold Orien, LaserJet Technical Marketing

Situation:

Under certain conditions customers may encounter a paper handling error message on their

Color LaserJet 5/5M printer front panel which they wish to override. A good example of this

is: the printer is asking for the user to load a different size paper tray than is currently

loaded. The customer may want to ignore this message and have the job print out on the

paper size that is currently loaded.

Examples of this type of message include:

· 11.1 Front Tray Load (Paper type)

· 11.2 Rear Tray Load (Paper type)

· 11.3 Manual Feed (Paper type)

Solution:

It is not possible to override this type of error message. The user must either cancel the

print-job (this can be done in one of two ways ? see below) or perform the task indicated by

the message (in the example above this consists of inserting the correct paper tray into the

printer).

To Cancel the Print-job:

· If the job has been completely loaded into the printer?s page buffer (this is often the case

for small print jobs customers may clear the job by simply pressing the RESET key once.

Warning: All temporary macros and temporary soft fonts will be lost!

· For larger jobs it may be necessary to cancel the job using the appropriate spooling soft-

ware. In Microsoft Operating Systems the print spooler will usually display an error message

on the customers screen. This message will ask if one wishes to cancel the job.

For jobs that have been spooled to a network print queue, it may be necessary to

contact the system administrator to delete the print-job from the queue.

(Note: after canceling the print-job, it will still be necessary to press RESET to clear the

printer. The printer may take a short while to come back on-line. )

HP Company Confidential ?

1-14

123456789012345678901234

Printer Maintenance

Listed below is a table of replacement consumables:

Unit

Printer Message

Page Count

Consumable P/N

Toner

TONER OUT

2200 pages

C3102A = Cyan,

(CMYK)

C3103A = Yellow

ADD (Colour)

C3104A = Magenta

C3105A = Black

Toner

14.5 REPLACE

Varies with

C3120A

Collection

COLLECTION

Toner

Box

KIT

Usage

Coating Pad

14.6 REPLACE (CLJ)

Varies with

C3106A

Cleaning

COATING PAD

Toner

(CLJ)

Roller

KIT

Usage

Coating Roller 14.6 REPLACE

Varies with

Cleaning

COATING ROLLER

Toner

C3964A

Roller

KIT (CLJ5)

Usage

(CLJ/CLJ5)

Black

19.1 BLACK DEVEL.

40Kpages

C3107A (CLJ)

Developer

USER MAINTENANCE

C3965A (CLJ/CLJ5)

Colour

19.2 COLOR DEVEL.

40Kpages

C3108A (CLJ)

Developer

USER MAINTENANCE

C3966A (CLJ/CLJ5)

Transfer

19.5 TRANS BELT

60Kpages

C3110A (CLJ)

Belt

USER MAINTENANCE

C3968A(CLJ/CLJ5)

Fuser

19.4 FUSER

80Kpages

C3111A (CLJ)

USER MAINTENANCE

C3969A (CLJ/CLJ5)

19.3 DRUM

60Kpages[1]

C3109A (CLJ)

Drum

USER MAINTENANCE

C3967A(CLJ/CLJ5)

[1] The page count for the drum is incremented once for every standard mono-

chrome page and twice for each multiple colour page, legal, tabloid or A3

page.

Note the C3106A Coating Pad is compatible with only the C3911A fusing assy.

Note the C3964A Coating Roller is compatible with only the C3969A fusing assy.

1-15

123456789012345678901234567890121234567890123456789012345678901212345678901234567890

1 23456789012345678901234567890121234567890123456789012345678901212345678901234567890

123456789012345678901234567890121234567890123456789012345678901212345678901234567890

1 23456789012345678901234567890121234567890123456789012345678901212345678901234567890

123456789012345678901234567890121234567890123456789012345678901212345678901234567890

1 23456789012345678901234567890121234567890123456789012345678901212345678901234567890

123456789012345678901234567890121234567890123456789012345678901212345678901234567890

1-16

HP Color LaserJet (CLJ) and Color Laser 5/5M

Consumable Compatibility Matrix

All Maintenance items are backward compatible. However,

* the Coating Pad Kit and Coating Kit MUST be installed into the correct fuser.

* Installing Color LaserJet (CLJ) Imaging Units in the Color LaserJet 5/5M (CLJ5/5M)

can degrade print quality and is therefore not recommended.

For optimal performance of the CLJ & CLJ5/5M use the correct consumables, check list

below for compatibility:

* New supplies with CLJ5/5M

Product

Product Name

Comment

Compatible

Number

with.......HP

with..HP Color

Color LJ

LJ 5/5M

C3105A

Black Toner

Full Compatibility

C3102A

Cyan Toner

Full Compatibility

C3103A

Yellow Toner

Full Compatibility

C3104A

Magenta Toner Full Compatibility

C3120A

Toner Collection Full Compatibility

Kit

C3106A

Coating Pad Full Compatibility

Kit

C3964A

Coating Kit

Compatible with

C3969A Fusers

C3107A

Black

HP CLJ ONLY

Developer

C3965A

Black

Full Compatibility

Developer *

C3108A

Color

HP CLJ ONLY

Developer

C3966A

Color

Full Compatibility

Developer *

C3109A

Print Drum

HP CLJ ONLY

C3967A

Print Drum *

Full Compatibility

C3110A

Transfer

HP CLJ ONLY

Assy

C3968A

Transfer*

Full Compatibility

Assy

C3111A

Fuser (opt110

HP CLJ ONLY

Opt 110 or

=110v, Opt

220

220 = 220v

C3969A

Fuser *(opt110 Full Compatibility

Opt 110 or

=110v, Opt

220

220 = 220v

1-17

Subject:

Consumables Not Covered Under Warranty

HP Security level: HP Internal

Color LaserJet 5 / 5M

Technical Update

November 7, 1996

Authors: Tony Barrett, Harold Orien, LaserJet Technical Marketing

Situation:

After reviewing data found on our weekly CSO reports and after receiving a number of

inquiries concerning warranty coverage for consumables, CCD Technical Marketing is

providing this information as a review of warranty policies concerning user maintenance and

supplies.

Warranty Periods for HP Color LaserJet 5/5M Printer and Supplies

HP Color LaserJet 5/5M Printer 1 year

Black Developer 90 days

Color Developer 90 days

Transfer Belt 90 days

Fuser 90 days

Print Drum 90 days

Coating Kit 90 days

Collection Kit 90 days

Software 90 days

Toner 90 days

Each of the ?consumable? supplies listed above have a warranty code of ?3B / 90 days

return to HP.? The following warranty note in the product support plan also pertains to a

specific subset of these supplies: ?Note that the initial set of imaging units are covered for

one-year on-site along with the main product coverage for defects only and not maintenance

for end-of-life condition. Subsequent imaging units? warranty is covered for 90 days for

defects only.?

In other words: during the warranty period of the printer (1 year), certain consumables may

be replaced under warranty if they are found to be defective and if they were shipped with

the printer originally. These consumables are : black developer, color developer, transfer

belt, fuser, print drum. Again, these consumables may only be replaced under warranty if

they are still within their expected usable life as indicated on the self test page and if they

were among the original supplies shipped with the printer.

Please Note: The one-year warranty on the Color LaserJet 5/5M printer does not entitle

customers to free replacement of the supplies listed above when the supply has reached its

maximum usable life as specified on the self-test page.

When servicing a printer it is important, therefore, to refer to the self-test page to ensure that

all consumable items are still within their expected usable life.

Extended Warranties:

Customers should refer to their support contracts for details concerning coverage of sup-

plies. Generally, most extended warranties do not cover supplies and the same warranty

policies listed above would apply to the customer under an extended warranty contract.

Special Situations:

Unfortunately a few customers could experience a failure of a consumable after the 90 day

warranty and before the consumable?s end-of-life. In these situations, where we are certain

that there is no abuse, or intent to defraud, and the problem is not a result of improper or

inadequate maintenance by the customer, warranty should be extended in the interest of

customer satisfaction. Please refer to page 1 of the ?HP Warranty Guidelines? where it

states: ?Philosophy ? Product warranties are a means by which Hewlett Packard: manages

our customers? perception of HP product reliability; provides customers with a safety-net to

protect them form early product failures?; and obtains important feedback on product

reliability.?

This section further states: ?if the customers situation is not covered by the warranty policy

or these

guidelines, our decisions should be biased towards doing the right thing for the customer.?

HP Company Confidential ? Not to be given to customers

Subject:

Consumables End-of-Life and Postscript Printing

HP Security level: HP Internal

Color LaserJet 5 / 5M

Technical Update

April 1, 1996

Author: Harold Orien, LaserJet Technical Marketing

Situation:

If a consumable reaches end-of-life while the customer is attempting to print a Postscript

print-job, a status message will appear on the front panel. The customer will not be able to

print his/her Postscript print-job.

The status message will continue to display on the front panel and no printing will be

possible in Postscript mode until Developer the appropriate consumable is replaced. This

situation does not occur when printing in PCL. (An end-of-life message does appear, but the

customer can continue printing. Print quality degrades until the customer replaces the

consumable indicated.)

This situation occurs on both the Color LaserJet 5/5M and the Color LaserJet.

The following consumables produce the above situation when they reach end-of-life:

Color

Black Developer

Drum Cartridge

Transfer Assembly

Fuser

1-18

Coating Pad Kit (Color LaserJet Fusers ONLY)

Coating Kit (Color LaserJet 5/5M Fusers)

The situation is not seen when the following consumables reach end-of-life:

Toner (all colors)

Toner Collection Kit (The printer will not print in either PCL or Postscript

mode until replaced.)

Solution:

Customers must replace the consumable indicated by the status message in order to con-

tinue printing in Postscript mode. Where possible customers may wish to switch to PCL

mode to continue printing.

It is recommended that customers keep a supply of consumables on-hand to prevent down-

time.

No technical changes to either the Color LaserJet or the Color LaserJet 5/5M are planned.

1-19

C3100A/C3961A - Faults with Error Numbers

Please note all "paper jam" messages are in the Paper Path section at the end of this

chapter. See PostScript section for PS ERROR's.

Defect:

"TONER OUT CMYK, ADD "CYAN"?

(CLJ - Aug 95 - Paul Fraser - UKCE)

Detail & Solution(s) In this case message advises that CYAN is out. CE first checked

Cyan Toner sensor, seemed OK. Then swopped toner hopper cables, fault stayed with

Cyan Replaced Sensor PCA. The problem was resolved by replacing the Formatter

PCA.

Defect:

11.1 FRONT TRAY LOAD "LETTER"? This when the paper tray is A4 size.

(CLJ / CLJ5 - Apr 97 - Technical Update, Boise)

Detail & Solution(s) - The CLJ & CLJ5 has no continue button, therefore this mes-

sage cannot be overridden. At this time ensure correct size of media is chosen in

application before its sent to the printer. Also the printer could be powered down or

the RESET button could be used This may work for parallel connect, but may not

work with networks. Manufacturing divisions are aware of the problem this message

gives to some customers. See Section 1 for more detail.

Defect

13.1 CLEAR DRUM WINDING JAM? This indicated that paper is beginning to wrap

around the Print Drum.

(CLJ / CLJ5)

Detail & Solution(s) Check the following:

1. Remove any paper wrapped around the print drum.

2. Check that media meets paper specifications

3. Check that paper is not being re-fed into the printer.

4. Check that drum wrap sensor (on-board the print drum DWS) is not blocked.

5. If no paper is seen, run "Drum Winding Jam Sensor Calibration routine". Use

Service Mode Status/Test address 47 to calibrate the Drum Winding Sensor [put

printer into "Service Mode" (page 7-124 of service manual, then toggle down

menu to "Engine Service Status/Test Mode" (page 7-125), then enter "Address

47" to calibrate .

Also Note:

If a test drum which has the fusible link already blown can be installed to verify failures

such as repetitive print defects. DO NOT print no more than 50 pages with the test

drum. The test drum may cause this error. If it occurs, use Service Mode Status/Test

address 47 to calibrate the Drum Winding Sensor, as above. It is necessary to

recalibrate this sensor when installing original drum. If the Print Drum is replaced for

a defect, the drum winding calibration is automatically performed.

Defect

"13.1 CLEAR DRUM WINDING JAM"? Then printer may be powered down then up

again, a "13.5 CLEAR FUSING JAM "(Fuser jam for CLJ), or "ORANGE/BROWN

page" may occurs, or "SMEARED Print" may occur, or appear not to be "FUSING

Toner" to the page.

2-1

CLJ /CLJ5 - Faults with Error Numbers (Con't)

(CLJ - Jan 96 - James Lomas -Boise)

Detail & Solution(s) When the 13.1 error occurs and then if the side door or top cover

is opened without clearing the paper jam (PJ), the unit believes the PJ has been cleared

and unit will come ready. When the printer starts running, the paper left in the unit will

be pushed further into the drum area. However, this paper may not stop future printing.

It may do the following:

* Block the AC corona, thus preventing charging giving orange/brown pages.

* or, it may SMEAR the print on the print drum

* or, it may give the appearance of Poor Fusing.

If the above is suspected implement the following:

1. Instruct the customer to look closely at the print drum area and ensure it is clear

of paper.

2. Service personnel should also check drum is clear of paper.

Defect

"13.5 CLEAR FUSING JAM"? Paper did not arrive at sensor PS1(exit) in time, this

occurs at power-up. TOP LID MUST be opened and closed to clear message.

(CLJ / CLJ5 - Mar 97)

Detail & Solution(s) - This is obviously a false paper jam, PS1 has failed to detect

media within the predetermined time out paper has jammed within the fuser area. In

this situation C will show if PS1 sensor is OK. Do NOT replace Control bd, Fuser

assy, transfer assy or PS1 sensor, firstly check the following:

1. Use internal service test (Status / Test 22 addr 22) to check out PS1 sensor.

2. If PS1 is OK, check that the LHS and top interlock switches are not overridden or

faulty. Do you get "door open" messages when doors / lid is opened? The I/L's

could be damage. It is normal that these I/L's cause this 13.5 PJ.

Note: Once the printer detects a PJ, it must sense that a door has been opened to

clear jam. If door is not detected open the 13.5 PJ message will remain.

3. Transfer Assy installed correctly.

4. See Error 55.7 in this section of the "C3100A - Faults with Error Numbers", also

refer to service note C3100A-04.

Defect

"Error 18.4 CLEAN TRANSFER CORONA"?

(CLJ - Sept 96 - Stephen Clark, UKCE)

Detail & Solution(s) CE firstly replaced Transfer Belt Assy and HVPS and this action

did not resolve problem. The next action of checking and re-seating PC Drum resolved

problem. Note this error condition does not always a transfer corona issue.

Defect

"18.5 or 18.6 RE-INSERT DEVELOPERS"? This may led to 54.3 Toner Concen-

tration Errors?

(CLJ - Jun 95 - Service Note C3100A-05)

Detail & Solution(s) The possibility of damaging the gear cluster on the Toner Hopper

assy exists when installing the Developer Drive assy . It is possible for an alignment pin

located on the Developer Drive assy to hit this gear cluster and bend sheet metal that

surrounds it. This causes the Toner Hopper not to align correctly. This binding can cause

Error 18.5 or 18.6, malfunction of the select mechanism on the Toner Hopper, or mal-

function of the Toner Delivery system to the Developers. A malfunction of the toner

delivery system will cause an Error 54.3, since toner will not be delivered to the develop-

2-2

ers.

All that is required to resolve this problem is to:

1. Remove 3 screws from the Toner Hopper Assy which holds in place.

2. Slide this assy towards the left side of printer, no need to remove this assy.

3. Install Developer Drive assy & tighten its screws

4. Slide Toner Hopper back into position making sure alignment pin is correctly

positioned in the gear cluster.

5. Reinstall the screws that hold the Toner Hopper in place.

If the gear cluster has been damaged beyond repair the Toner Hopper Assy will need to

be replaced. See Service Note C3100A-05 for more detail.

Defect

18.5 RE-INSERT DEVELOPERS (BLACK)?

(CLJ - Jun 95 - Keith Tindall, UKCE)

Detail & Solution(s) This error advises that Black Developer Roller is NOT turning.

Checking Service Note C3100A-05 did not show any damage to gear cluster of the

Toner Hopper Assy. In this case the CE had replaced 3 Black Developer assy's, Control

PCA & SL3 Toner feed solenoid and still no black toner would feed in to developer.

This seemed to be due to SL3 solenoid not operating. There was mechanical drive to the

developer and toner feed mechanisms. This problem was resolved by operating SL3

manually allowing toner to feed to developer. Once self-test was initiated Error 18.5

never appeared again. It was assumed there was some mechanical binding which

caused this problem.

24 BUSY MOVING TONER?

(CLJ - Aug 95 - Paul Fraser, UKCE)

Detail & Solution(s) This message advises that the developer is short of toner and is

busy moving toner into developer. In this case, selected toner was not moving toner into

the developer, thus message appeared. The printer did look as if it had been dropped

and damaged slightly. A mechanical coupling to drive toner selector shaft and drive

shaft had come adrift and was not allowing mechanical transmission to the selected

toner. Simply reconnecting this coupling resolved this problem.

Defect

24 BUSY MOVING TONER?

(CLJ/CLJ5 - Tech Update - Boise - July 96)

Detail & Solution(s) If an incorrect Developer Drive assy is placed into a colour

printer (i.e. a CLJ assy is placed into a CLJ5, or visa-versa) the printer will continue to

function. However, because the drive train gear for the hopper mechanism is different

on the 2 types of assy's, a error outline to the left of this page may occur.

ENSURE the correct Developer Drive Assy is used

Part Numbers are:

CLJ - 110v = 07BA-1552KC

- 220v = 07BB-1552KC

CLJ5 - 110v = 07BM-1552KC

- 220v = 07BP-1552KC

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-3

Defect

24 BUSY MOVING TONER? after 2 or 3 printed pages?

(CLJ - S.Oakes - Manchester - May 96)

Detail & Solution(s) The DC Controller did not recognise when toner had been

exhausted from any of the Toner Hoppers. Replacing DC Cont PCB resolved this

problem.

Defect

50.X FUSER SERVICE?

50.1 Fuser Temp too high;

50.2 Fuser Temp too low;

50.3 Fuser Temp sensor is open

50.4 Fuser Temp error caused by erratic sensor

values.

(CLJ/CLJ5 - Feb 95 )

Detail & Solution(s) Try the actions below before replacing Fuser or DC Controller:

1. Check Fuser connector, fully seated?

2. Open & close both doors during power-up, if message appears immediately, replace

Fuser Assy

3. Replace Fuser Assy.

4. Replace Control PCA.

Note: to clear this message power down printer for 20 minutes. To clear quickly, go

into Service Mode, Register Adjust & set Addr 47 to 0.

Defect

52.2 ENGINE NVRAM SERVICE? This error occurs when NVRAM is new and the

old consumables are used.

(CLJ / CLJ5)

Detail & Solution(s) The printer checks an address in NVRAM for engine status. If status

is NEW then printer checks consumables to see if fuses are NOT blown. If fuses are blown

then Error 52.2 occurs.

Check if fuses are blown on new developer:

Colour Developer - ohm across pins 5 & 6

Black Developer - ohm across pins 4 & 6

1. If Control PCA has been replaced, ensure the NVRAM has been swopped over.

2. If fuse has blown try replacing appropriate developer. (Colour or Black)

See Service note C3100A-03 for detail.

Defect

"54.2 ENGINE ERROR/SERVICE"? 24v Power Supply Error.

(CLJ - April 95 -Paul Fraser - UKCE)

Detail & Solution(s)

1. In this case the DC Power Supply resolved pbm.

Other causes may be:

2. Tab on LHS door which closes top cover I/L switches are bent. This will NOT close

completely giving this error. Straighten this tab.

3. Check fuses F5 in DCPS & F2 on Control PCA.

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-4

123456789012345678901234567890121234567890123456789012345678901212345678901234567890

1 23456789012345678901234567890121234567890123456789012345678901212345678901234567890

123456789012345678901234567890121234567890123456789012345678901212345678901234567890

"54.3 ENGINE ERROR/SERVICE"? This is a general troubleshooting procedure

for this fairly common fault. It provides methodical steps to help you isolate the true

cause of this error. Always have Service Manual handy for greater detail.

What causes Error 54.3?

54.3 occurs when the toner concentration in one or more of the developers is too high or

too low. Each of the 4 developers (CMYK) has a concentration sensor, each checking

the levels of toner within. This problem normally is caused by the toner hopper system

not delivering enough toner to the developer (Therefore a HIGH toner concentration

value 63 or 127).

Developer Units

It is a great temptation to firstly replace the offending developer, DO NOT DO this. In most

cases it will simply mask the problem for a short time, but it will return. The reason for this is a

new developer has preloaded a starter toner mixture. As the toner level depletes due to

usage, the concentration sensor will gradually rise until it reaches 63 and then the error

will appear on the display again.

Step by Step Troubleshooting procedure:

1. Remove Toner Hopper covers so the toner plastic pipes can be seen. If toner is partially or

not present in this of any of the 4 pipes, suspect this colour. At step 3 select this colour.

2. Ensure each colour toner hopper has enough toner within.

3. Run JetTest96 and print off say 10 Cyan full colour pages. Faint print is an indicator of the

colour which is causing 54.3 error. Look at customers prints, self-tests, look for this. It is

always best to examine primary colours as opposed to composite colours.

4. Observe big white plastic gear on Cyan Toner Hopper, is it rotating? (Note it may take 2

to 4 printed pages before it rotates)

5. Check plastic Cyan toner feed pipes, can you feel toner being augured down?

6. If the result of 4 & 5 is no, the manually turn Large white gear, can you feel toner

being fed down plastic pipe? Note if pipe is full open "trap door" at the developer end

of this pipe, is toner being ejected as you manually turn this gear?

7. If the result of step 6 no movement of toner suspect the following:

* Check toner in hopper has not compacted, open this hopper and very gently stir

toner, take great care when doing this, just enough to free any compacted toner.

* Broken Auger in plastic pipe (replace Toner Hopper assy)

* Auger gear broken, or binding (little gear below large white gear) (replace Toner

Hopper assy)

* Correct colour not being selected on toner hopper, you should see selector finger

below toner hopper selecting Cyan hopper. This could mean the toner hopper select

shaft is out of alignment or an engagement problem between developer drive and the

toner hopper.

8. Repeat steps 3 thru to 7 for each colour M, Y & K.

9. If toner appears to be delivered to the developer OK then implement the following steps.

10. Check concentration parameter for each colour developer:

* Use Service Manual for greater detail (P = page in Service Manual), general

guidelines are below.

* Enter service mode, Press ON-LINE + FORM FEED + ITEM and power on, see

p 7-124.

* Press MENU until "ENGINE SERVICE REGISTER ADJUST" is reached.

(p 7-125)

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-5

2-6

CLJ /CLJ5 - Faults with Error Numbers (Con't)

* Press ITEM for "ENGINE SERVICE STATUS/TEST MODE" is reached.

(p 7-125)

* Select service mode status/test address 19 (unlock all toner solenoids), you

should hear solenoid click after selection (Page 7-131).

* Now enter service mode status/test address 08 (p-131), then enter sub-test code

(p 7-133) to select developer you wish to access (C,M,Y or K).

* You will hear the developer drive motor turn and the display will give a reading.

* The parameter can be in range of 10-50 if the concentration for that colour if OK

* If the value is 63 or 127, manually turn large white gear associated with the

colour being measured, this manually feeds toner into the developer. The value

should drop, it typically starts to drop slowly, then in my experience suddenly

drop to around 10 or less, but in the range of 10-50 is OK.

* Be aware if the value does not change after 30seconds to a 60 secs, do not put

any more toner into that particular developer. Stop test and pull developer assy

out, is toner overflowing? Is so, the developer assy concentration sensor or

Toner Sensor PCA or Control PCA or cable connections may be faulty.

(p 7-150/151 Block Diags)

* Repeat step 10 for each colour developer.

11.When step 10 has been completed for each developer and the reading is in the range

of 10-50, power printer off then on, and run JetTest96 for each colour (CMYK), now

you should see each large white gear on the toner hopper assy turn for each colour

selected. It should hold now and no error 54.3 should occur if all is OK.

12.If the error 54.3 now appears and you have implemented steps 1 to 11 and the

concentration value for a particular colour still remains at 63 or 127 you now can:

* Replace Developer assy, in my experience the developer concentration sensor is

not reporting increase in toner manually fed in, or

* Check cabling between developer, Toner Sensor PCA & Control PCA, or

* Replace Toner Sensor PCA, or

* Replace Control PCA.

Hopefully this procedure will provide the guidelines to help you through what can be a

fairly difficult error to isolate. Other sources of information service note C3100A-07

Defect

54.3 ENGINE ERROR/SERVICE? First page of self-test prints OK, 2nd page prints

only yellow block at bottom of

page, then this error occurs?

(CLJ - Jan 96 - Steve Clark UKCE)

Detail & Solution(s) All colours show a concentration reading of 63, tried to manu-

ally feed each colour toner into the developer and monitored reading. Could not reduce

this value in colour developers, Black value OK. Found in this case, the colour devel-

oper assy replacement resolved this problem. BEWARE, do not replace any of the

developers until process in service note above has been checked.

Defect

54.3 ENGINE ERROR/SERVICE?

(CLJ - Sept 95 - S.Oakes / B.Edwards UK)

Detail & Solution(s) It was found the cause of this problem was due to the inadvert-

ent reassembling of a gear on the selector shaft of the Toner Hopper Assy. There are 2

gears on the end of the selector shaft which MUST be phased together (Note as these

are part of the Toner Hopper Assy there should be NO NEED to take these off). In our

case these gears were 180 degrees out of phase and we found the Magenta & Cyan were

CLJ /CLJ5 - Faults with Error Numbers (Con't)

running most of the time, yellow not at all. To summarize it seems when selecting Yel-

low, Cyan was selected instead causing the 54.3 Error, due to the fact the DC Cont

would be checking the concentration of the yellow in the developer assy.

Defect

54.3 ENGINE ERROR/SERVICE?

(CLJ/CLJ5 - Tech Update - Boise - July 96)

Detail & Solution(s) If an incorrect Developer Drive assy is placed into a colour

printer (i.e. a CLJ assy is placed into a CLJ5, or visa-versa) the printer will continue to

function. However, because the drive train gear for the hopper mechanism is different

on the 2 types of assy's, a error outline to the left of this page may occur.

ENSURE the correct Developer Drive Assy is used

Part Numbers are:

CLJ - 110v = 07BA-1552KC

- 220v = 07BB-1552KC

CLJ5 - 110v = 07BM-1552KC

- 220v = 07BP-1552KC

Defect

54.4 ENGINE ERROR?

This error indicates the home position for the cam timing was

not sensed. The sensor is located on the back of the Dev Bias Supply. (See Service Note

C3100A-01)

(CLJ / CLJ5 - Apr 97)

Detail & Solution(s) Troubleshooting tips:

1. Check that customer has Re-seated Optics Glass Cleaning Tool correctly.

2. Check tab which activates the AC Interlock switch. The tab is located to the

right & below the black developer. The tab should be straight & not bent towards t

he right of printer. Use your finger & bend back until straight.

3. Check 24v at test connector located on rear of printer(Pin 20 =24v & pin 22 = grd)

on power-on. If no voltage , check I/L switches on LS of printer. Replace switch if

necessary or if 22v is not reached replace DC Power Supply.

4. If DC PS is OK, watch AC Motor (M2) behind RHS cover as the printer is turned

on. If 120/240v is available to Motor M2 connector when motor is disconnected,

replace this motor, if not replace AC power Supply. If pbm persists replace the

Control PCA. See Service Note 3100A-01 for greater detail.

Defect

54.5 Developer Home Position Error? This message indicates the printer failed to detect

the Developer Cam Home Position signal, or PS6 sensor is defective.

(CLJ - Oct 94 - Paul Withers, USA)

Detail & Solution(s) Toner hopper select gears not meshed properly. Removing and

reinstalling the toner hopper assy resolved this problem.

Other actions to try:

Check PS6 is not disconnected of faulty. Refer to service manual page 7-47 to run

Service Mode test to check out Developer Drive Motor and PS6 sensor.

2-7

Defect

ERROR 55.7 ENGINE CMD? At power-on the Fuser Fan does not speed up. Front

panel proceeds through Self-Test, counts memory & displays above error. Print Engine never

moves.

(CLJ - Feb 95 - Tim Johnston, USA)

Detail & Solution(s) The fuse on Control PCA was blown. The reason was because

of the wiring harness in the back of the printer was not routed correctly. This allowed

the Power-Supply drawer to rub on this harness in transit & short-out +5v to the Con-

trol PCA. The cable harness can be seen by removing the PS drawer look in the back

LH corner with a torch. See Service Note C3100-04 for detail. This can also cause the

following errors, 57 Fan Error, 13.5 Fuser Jam plus other problems of an unknown

nature.

It is very important to follow procedure outlined in service note C3100A-04 before

replacing any parts.

1. Check this wiring harness as above, insulate any damaged wiring. Order C3100-

67907 kit.

2. If any of the 8 fuses on install new Control remember to swop NVRAM. Check

+5v on Control PCA.

3. Try re-seating Formatter PCA or replace, check for bent connectors.

Defect

ERROR 57? Fan Motor Service Error. This message indicates either Drum, Formatter,

DC Power Supply or Fuser fan is not running or running at incorrect speed.

(CLJ/CLJ5)

Detail & Solution(s) Cycle power, if fault persists:

1. Reseat fan connector on Relay Bd(CN654), also check connectors CN209, CN208

& CN205.

2. Check wiring harness as per Error 55.7 previously outlined. See service note

C3100A-04 for detail.

3. Physically check fan rotation.

4. Replace defective fan.

5. Replace DC Power Supply.

Defect

79 SERVICE (xxxx) and/or Slow and/or Partial Printing? How to troubleshoot

when this fault error is displayed.

(CLJ5 - Boise Technical Update - Sept 96)

Detail & Solution(s) This error most frequently occurs as a result of the user soft-

ware incorrectly communicating with the printer. It can be often a bug in the software

code that created the print job. The printer hardware may occasionally be the cause of

the problem. To determine if hardware or software:

* print continuous self-test page, if Error 79 occurs replace Formatter ,

otherwise refer customer to software provider:

The root of the software error 79 can be complex, it may be that the print job, especially

when CLJ is connected to networks, is taking a long time to print.

Slow Printing can be attributed to:

* Large colour print jobs takes many minutes to complete, this is quite normal.

* Network software & hardware configurations may contribute.

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-8

* Insufficient memory, note PostScript jobs require a minimum of 36Mb, Note

HP does not quantify performance impact of adding memory.

* High Network traffic can also be a factor

* Memory allocation may be an issue, there may be a small possibility of how

memory is allocated for print jobs over a period of time may diminish available

memory. Try power-cycling the printer to release previously allocated memory.

Partially Printed Print Jobs may be attributed to:

* Slow printing as above

* or, NW software (Novel, MicroSoft, NT) usually have an adjustable timer to

control the amount of time allocated to print spool jobs. Try increasing this.

* or, Internal Printer Timeout value, try setting to 300secs.

* or, Colour print files are far larger than mono files, these can be susceptible to

this problem.

* or, Multiple pages being fed through the printer.

In summary to diagnose this Error 79(xxxx) and slow printing:

1. Run Continuous Self-Test, if it fails replace Formatter PCA.

2. If no, Increase Internal printer Timeout to 300secs. (PCL Menu).

3. Try increasing NW spool allocation timer.

4. Is NW traffic too large

5. Try failing print job to CLJ/CLJ5 when directly connected to parallel port.

6. Is enough memory installed? HP does not quantify this amount, but PostScript

requires minimum of 36Mb.

7. Try power-cycling printer, there may be memory allocation problems over a period

of time.

Again replacing Formatter PCA will most likely not resolve your

problem.

Defect

79 SERVICE (xxxx)? Unrecoverable error occurred in Formatter F/W.

(CLJ/CLJ5)

Detail & Solution(s) Check the following:

1. Check if associated with specific user job. There may be a bug in the software code

that has created the job.

2. Check wiring harnesses per Error 55.7 previously outlined. See service note

C3100A-04 for detail.

3. Replace Formatter PCA.

Note: Ensure failure code (xxxx) is returned with Formatter PCA.

Defect

79 SERVICE (xxxx)

(CLJ5 - Jul 96 - Boise Technical Update)

Detail & Solution(s) The PostScript SIMM for the CLJ (C3112A) is being installed

into the CLJ5. If this is done an Error 79 will be displayed. Also please note the new

PostScript SIMM (C3963A) for the CLJ5 will not work in the old CLJ.

Please when qualifying call, check the correct PostScript SIMM has been installed in

the CLJ or the CLJ5.

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-9

Defect

79 SERVICE (0426) on power-on?

(CLJ - Mar 95)

Detail & Solution(s) Replacing Formatter PCA resolved this problem.

Note: Ensure failure code (xxxx) is returned with Formatter PCA.

Defect

79 SERVICE (xxxx) ?

(CLJ or CLJ5 - Tech Update - Boise - July 96))

Detail & Solution(s) If an incorrect Developer Drive assy is placed into a colour

printer (i.e. a CLJ assy is placed into a CLJ5, or visa-versa) the printer will continue to

function. However, because the drive train gear for the hopper mechanism is different

on the 2 types of assy's, a error outline to the left of this page may occur.

ENSURE the correct Developer Drive Assy is used

Part Numbers are:

CLJ - 110v = 07BA-1552KC

- 220v = 07BB-1552KC

CLJ5 - 110v = 07BM-1552KC

- 220v = 07BP-1552KC

Defect

89 SERVICE (4F00) (0x003B5CAC)? PostScript Error.

(CLJ - Aug95 - Paul Fraser, UKCE)

Detail & Solution(s) This error occurred on FREELANCE, AMI-PRO & CoralDRAW

when print multiple copies of a single page. The copies could set setup in either the

application or via the COPIES in printer front panel and fault would occur. The fault

would start perhaps on the 4th or 5th page with part of printed page missing, then by

6th or 7th page Error 89 would occur. Installing the LJ PostScript Color Driver 3.0.1

resolved this problem.

Defect

89 Service(0092)? When printing Postscript files? Faults occurs on the 4th or 5th page

printed.

(CLJ - Jan 96 - Pepi Fermi / Bob Edwards, UK)

Detail & Solution(s) Customer using PROJECT 4 application to print these Post-

Script files. Problem was found to occur when using JetDirect EX Box to parallel port

of printer. When a MIO JetDirect card was installed no problems. Solution was to

supply customer with a MIO JetDirect card.

Defect

Error "EIFTST-3 SRDY Timeout" or "VIDEO 1 CRC error ex:bac3, rx: 09ca"

messages appear when running the EXTENDED DIAGNOSTIC Printed Test. Coloured

Banner at the top of page does not appear as per example in the Service manual and only 2

pages are printed (1st page with incorrect banner, 2nd blank?)

(CLJ Only - Jun 95)

Detail & Solution(s) This problem only occurs if A4 media is used, it is a known bug

with the CLJ FW. It is highlighted on page 7-119 of the service manual.

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-10

Defect

Message "1. Video 7 Page £2 insufficient memory for image Data" occurs when

running extended diagnostics. This when printing horizontal bars in a landscape mode,

these filled this page (note: not horizontal bars in portrait mode in upper part of the page

as in the service manual page 7-121.

(CLJ5 - Sept 96 - Keith Scoons, UK)

Detail & Solution(s) This problem is most likely to be a printer Firmware issue, but

will not affect the operation of the unit. It may be fixed in a future release of

firmware.

CLJ /CLJ5 - Faults with Error Numbers (Con't)

2-11

CLJ/CLJ5 - Miscellaneous Problems

Defect

"Customer wants to print colour images on A3 size paper"?

(C3100A - May95)

Detail & Solution(s) Colour printing is NOT supported on A3 sizes paper. Only

Letter, A4 and Executive is supported with colour printing.

Defect

Customer printing BOTH SIDES of the Page or DUPLEX printing? This may cause

paper jams, paper feeding or print quality problems.

(CLJ/CLJ5 )

Detail & Solution(s) This model of LaserJet is a SIMPLEX printer and is not designed

for Duplex printing. Although this printer can print on both sides, this practice is not

supported by HP. For the general HP statement on "Duplex printing v Simplex" please

reference HP Reference Guide (Green Book) section 3.

Defect

Customer RE-FEEDING paper, not two sided printing?

(CLJ/CLJ5 )

Detail & Solution(s) As above refer to HP general statement on "Duplex printing v

Simplex" in HP Reference Guide (Green Book) section 3.

Defect

PAPER JAMS/MISFEEDS/SKEWING caused by customers practice of

INTERLEAVING different types of paper in paper trays?

(CLJ/CLJ5 )

Detail & Solution(s) Interleaving, where a variety of paper is placed in the paper

tray, is not recommended by HP. This practice is likely to lead to Paper jams &

Misfeeds. For the general HP statement on "Interleaving Paper" please reference HP

Reference Guide (Green Book) section 3.

Defect

STATUS ERROR (200xx) appears on PC Host when printing multiple copies of a

large document?

(CLJ - May 95)

Detail & Solution(s) In Windows Control Panel:

1. Select Printers.

2. Select Connect

3. Increase"Timeout" to higher value, range 45 to 200. With a setting closer to 200

this resolved this problem.

Defect:

I/O TIMEOUT message appears on Host PC when larger complex files are sent?

(CLJ5/5M - Jul 97 - Bob Edwards, UK)

Found the cause of this problem was a cheap inferior parallel cable, using IEEE 1284

compliant cable resolved this problem.

3-1

Defect:

PAGE COUNTERS are not ACCURATE? The Black and colour counters are derived

numbers and give an indication of usage , but are NOT accurate.

(CLJ - Dec 94)

Detail & Solution(s) The counters may jump around, increments or decrements from

one page to the next without cycling the power. A loss of 10 pages on the colours coun-

ter and gaining 16 on the black from one self-test to the next are common. This is NOT

a fault do NOT attempt to repair it. The consumable usage information at the top of the

Self-Test is accurate. Updating the FW to correct this problem should occur at some

time in the future.

Defect

LASERJETS used for CAMERA-READY work?

(CLJ / CLJ5 - Jun 95 - Boise Div)

Detail & Solution(s) It is up to the customer to decide on the suitability of a LaserJet

for Camera-Ready work. They MUST decide whether the LaserJet meets their needs.

Some may find it does meet their needs, whilst other with more stringent criteria may

not. Camera-ready work may highlight problems with small white voids or holes in

black areas or perhaps amplify skew problems, etc. HP does NOT recommend or

discourage LaserJets used for this type of work, but leaves it to the customer to decide

on suitability of this printer for this type of work. See Section 1 for more detail.

Defect

Host PC displays "Error 20023"? This occurs when printing multiple copies of a large

document.

(CLJ - Jul 95)

Detail & Solution(s) The resolution here was to, within driver, to change the

TIMEOUT from 45 to a longer time-out, perhaps 200.

Defect

IMAGE SLIPS Down Page by 25mm to 37mm from RFU (Rear Feed Unit) ONLY, no

problems when paper is fed via PC Tray? Please remember paper moves through the

printer in Landscape orientation.

(CLJ - Nov 95 - Andy Oldham UKCE)

Detail & Solution(s) It was found that the "Register Adjust" value 74 & 75 were cor-

rupt. These values were set to "0", Reset to factory default 74 = 48 & 75 = 43. See

page 7-128 in service manual and look for Register Adjust table. This problem normally

occurs when a RFU is installed at a time well after the initial installation of the printer.

Defect

MISREGISTRATION in both Vertical & Horizontal planes from the Rear Feed Unit

only?

(CLJ - July 95 - Richard Bacon - UKCE)

Detail & Solution(s) The Register Adjust Address parameters 74 & 75 (page 7-24 in

Service Manual) were set to zero. CE set these to default 74 = 48 & 75 = 43, this

resolved problem.

CLJ / CLJ5 - Miscellaneous Problems (Con't)

3-2

CLJ / CLJ5 - Miscellaneous Problems (Con't)

Defect

"75mm MARGIN on LHS" when printing colour in PostScript mode Only, PCL files were

OK.?

(CLJ - Apr 95 - Keith Scoons UK)

Detail & Solution(s) Initiating a COLD-Reset resolved this problem?

Defect

Prints OK in Monochrome, but not with several other colours?

(CLJ - Oct 95 -Pierre-Andre Buetzberger - Switzerland)

Detail & Solution(s) It was found that the gear (07AA77310KC item 5 on page 8-10

combined service manual) was damaged. Replacing this gear resolved the problem

Defect

Error "EIFTST-3 SRDY Timeout" or "VIDEO 1 CRC error ex:bac3, rx: 09ca"

messages appear when running the EXTENDED DIAGNOSTIC Printed Test. Coloured

Banner at the top of page does not appear as per example in the Service manual and only 2

pages are printed (1st page with incorrect banner, 2nd blank?)

(CLJ Only - Jun 95)

Detail & Solution(s) This problem only occurs if A4 media is used, it is a known bug

with the CLJ FW. It is highlighted on page 7-119 of the service manual.

Defect

Message "1. Video 7 Page £2 insufficient memory for image Data" occurs when

running extended diagnostics. This when printing horizontal bars in a landscape mode, these

filled this page (note: not horizontal bars in portrait mode in upper part of the page as in the

service manual page 7-121.)

(CLJ5 - Sept 96 - Keith Scoons, UK)

Detail & Solution(s) This problem is most likely to be a printer Firmware issue, but

will not affect the operation of the unit. It may be fixed in a future release of

firmware.

Defect

"HANGS in PostScript Mode" when printing PS Start-up page or PS Demo page or

customer PS files or PS Self-test page. No problems when printing in PCL Mode?.

(CLJ - Feb 96 - Pepi Fermi UKCE)

Detail & Solution(s) It was noted that the Coating Pad consumable counter was at a

ridiculously high count (129). The fuse in the Coating Pad consumable was not blowing

when replaced for the 2nd time. As you know on powering the printer on the fuse should

blow and the consumable counter will increment. In this case the fuse stayed intact and

at each power-on the counter would increment again. The net effect of this is to cause

the PostScript files only to hang when run. Ensure this Coating Pad fuse is blown

Information:

CLJ vs CLJ5's which O/P bin do they deposit TRANSPARENCIES (OHT) into?

(CLJ / CLJ5 - Feb 97 - Tony Barrett, Boise Division)

Detail & Solution(s) - Please note the following and educate everybody so they DO

NOT attempt to repair printers if the customer reports this as a fault.

Classic CLJ (C3100A)- All OHT are sent to the top face down bin.

CLJ5 (C3961A)

- All OHT are sent to the front exit.

This is normal difference between the 2 CLJ printers, it is not known why Division

decided to make this change in FW.

3-3

Defect

"PAPER OUTPUT's via Front Face-up Bin" even though Upper O/P Bin is selected?

(CLJ - Nov 95 - Vince Bottacchi - UKCE)

Detail & Solution(s) Will not switch to upper O/P bin at all, always directs paper to

Front Face-Up Bin. Diverter solenoid coil (SL5) at the front of the printer had gone open

circuit. It was found that the blue wire to this solenoid had been arcing to the chassis in the

wiring loom at the rear of the Power Supply Drawer. Note it did not blow fuse on Control

Bd (IC5). Replacing Diverter Solenoid SL5 resolved this problem and ensured wiring

loom could not rub against chassis in Power Supply Drawer area.

Defect

79 SERVICE (xxxx) and/or Slow and/or Partial Printing? How to troubleshoot when

this fault error is displayed.

(CLJ5 - Boise Technical Update - Sept 96)

Detail & Solution(s) This error most frequently occurs as a result of the user software

incorrectly communicating with the printer. It can be often a bug in the software code that

created the print job. The printer hardware may occasionally be the cause of the problem.

To determine if hardware or software:

* print continuous self-test page, if Error 79 occurs replace Formatter ,

otherwise refer customer to software provider:

The root of the software error 79 can be complex, it may be that the print job, especially

when CLJ is connected to networks, is taking a long time to print.

Slow Printing can be attributed to:

* Large colour print jobs takes many minutes to complete, this is quite normal.

* Network software & hardware configurations may contribute.

* Insufficient memory, note PostScript jobs require a minimum of 36Mb, Note

HP does not quantify performance impact of adding memory.

* High Network traffic can also be a factor

* Memory allocation may be an issue, there may be a small possibility of how

memory is allocated for print jobs over a period of time may diminish available

memory. Try power-cycling the printer to release previously allocated memory.

Partially Printed Print Jobs may be attributed to:

* Slow printing as above

* or, NW software (Novel, MicroSoft, NT) usually have an adjustable timer to con-

trol the amount of time allocated to print spool jobs. Try increasing this.

* or, Internal Printer Timeout value, try setting to 300secs.

* or, Colour print files are far larger than mono files, these can be susceptible to

this problem.

* or, Multiple pages being fed through the printer.

In summary to diagnose this Error 79(xxxx) and slow printing:

1. Run Continuous Self-Test, if it fails replace Formatter PCA.

2. If no, Increase Internal printer Timeout to 300secs. (PCL Menu).

3. Try increasing NW spool allocation timer.

4. Is NW traffic too large

5. Try failing print job to CLJ/CLJ5 when directly connected to parallel port.

6. Is enough memory installed? HP does not quantify this amount, but PostScript

requires minimum of 36Mb.

7. Try power-cycling printer, there may be memory allocation problems over a period

of time.

CLJ / CLJ5 - Miscellaneous Problems (Con't)

3-4

Again replacing Formatter PCA will most likely not resolve your

problem.

Subject: Consumables End-of-Life and Postscript Printing

HP Security level: HP Internal

Defect:

If a consumable reaches end-of-life while the customer is attempting to print a Post-

script print-job, a status message will appear on the front panel. The customer will not

be able to print his/her Postscript print-job.

(CL5/5M - Jan 97 - Technical Update - Harold Orien - Boise Division)

Detail & Solution(s) The status message will continue to display on the front panel

and no printing will be possible in Postscript mode until Developer the appropriate

consumable is replaced. This situation does not occur when printing in PCL. (An end-

of-life message does appear, but the customer can continue printing. Print quality de-

grades until the customer replaces the consumable indicated.)

This situation occurs on both the Color LaserJet 5/5M and the Color LaserJet.

The following consumables produce the above situation when they reach end-of-

life:

Color

Black Developer

Drum Cartridge

Transfer Assembly

Fuser

Coating Pad Kit (Color LaserJet Fusers ONLY)

Coating Kit (Color LaserJet 5/5M Fusers)

The situation is not seen when the following consumables reach end-of-life:

Toner (all colors)

Toner Collection Kit (The printer will not print in either PCL or Postscript

mode until replaced.)

Solution:

Customers must replace the consumable indicated by the status message in order to

continue printing in Postscript mode. Where possible customers may wish to switch to

PCL mode to continue printing.

It is recommended that customers keep a supply of consumables on-hand to prevent

downtime.

No technical changes to either the Color LaserJet or the Color LaserJet 5/5M are

planned.

CLJ / CLJ5 - Miscellaneous Problems (Con't)

3-5

Defect:
Print time is very slow?

(CL5/5M - April 97- Boise LaserJet Technical Marketing)

Detail & Solution(s): The Color LaserJet 5 and 5M have a modified Formatter board

with new firmware designed to increase the time to print for PCL driven bitmap print

jobs. Please note this option will NOT help all customers, it is dependent on

application, platform, driver. If the customers print jobs have a high percentage of

bitmap images such as photographs or scanned images, this enhancement will probably

be of benefit. Typically one can expect a 2x to 5x increase in print speed performance

for bitmap images.

A new driver is required to provide this increase in print speed., but the

Formatter must have a revision level of B.01.12 or greater and a CLJ5/5M FR Driver

must be used.

Please contact your local technical support for more detail.

3-6

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Steps to Take in COLOUR FAULT ISOLATION PROCESS.

If you have a

colour problem, whether it be colour mixing, faint colours, faded colours, use this

process to help isolate. Some discretion may be required to adapt this process to your

fault.

Use JetTest96 to run off full pages of CMYK & RGB, also run off a page of Self-test.

Use these pages together with customers examples of fault to help determine & isolate

colour fault. etc, please use this general procedure to isolate these problems:

1. Ensure DRUM ID matches Self-test, NOTE: this is NOT number of Print Drums assys

replaced. Also see Replacing Formatter process section 1.

2. Always clean optics glass, use on-board transfer assy cleaning blade to clean corona,

Clean Print Drum corona using drum cleaning handle, see section 4 of the Service

manual or Section 6 of the User Manual.

2. Run JetTest96 for each colour (CMYK), watch toner hopper for that colour, is the

toner being augured down to respective Developer via plastic pipes?

3. Check Concentration levels in each developer, if any are greater than 63, this means

not enough toner is being measured by the developer concentration sensor. Error

54.3 will most likely occur, refer to troubleshooting for Error 54.3 in "Faults with

Errors Numbers" section this Colour LJ part of this book.

4. If the CMYK full colour pages can be printed using JetTest96, do so. Does the

printed CMYK pages look rich or weak in colour concentration over whole printed

page?

5. Implement a Half-page self-test. Does amount of the toner viewed on the Print

Drum look rich or weak ? If the concentration looks good on the drum suspect the

transfer of toner. Items 2 to 5 will help you decide if:

* the problem is the amount of toner fed or arriving at the developer is sufficient.

* or is the correct amount of toner being developed onto the Print Drum? Laser

Power level problem? HV problem? or Print Drum problem?

* or is the problem a Transfer problem?

6. It is possible that NVRAM addresses had become corrupt, Check Locations 65=2

(Laser Power) and location 70 = 41 (Primary Grid). Beware be very careful as it is

easy to corrupt other NVRAM locations and make matters much worse, if in doubt

contact local RCE.

Note: JetTest96 is a "LaserJet Confidence Test Tool" developed in the UK by Steve

Oakes & Bob Edwards.

COLOUR VARIATIONS FAULT ISOLATION Procedure (CLJ5)

Process to adopt with there are COLOUR VARIATIONS in printed O/P from Multiple

CLJ5's in same location. Firstly check:

1. Is media used within specification?

2. Is environment within specifications?

3. Thoroughly clean printers.

4. Check that physical Drum I.D. (label on PC Drum assy) matches Drum Number

12345678901234567890123456789012123456789012345678901234567890121234567890

FAINT / FADED / WASHED-OUT Print FAULT ISOLATION Proce-

dure?

CLJ / CLJ5 - Print Quality Problems

4-1

on Self-Test page (note the Drum Number on the Self-Test is not the number of

PC Drum assys replaced). Also see Replacing Formatter process near beginning of

this section.

5. Implement "Colour Balancing Adjustment" as per service manual (page 7-140). It

is necessary during the early life of consumables to perform this test every 50 to

100 pages or so, especially if the exact output is required from multiple printers.

Variations should stabilize after 2500 pages on any given consumable.

Defect

RED & GREEN colours do not correct? RED appears magenta and GREEN appears

turquoise on self-test page.

(CLJ - Aug 96) (Vince Bottacchi - UK CE)

Detail & Solution(s) Do not replace Developers assys, use process above at the begin-

ning of this section to help isolate problem, do not throw parts at this printer. By using

above troubleshooting process, when a half self-test was performed it could be seen that

these colours were still not correct on the PC Drum. This led to the CE replacing the

Laser/Scanner assy and this resolved the problem.

Defect

RED on Self-Test Page appears ORANGE?

(CLJ - Oct 95 - Steve Oakes UK)

Detail & Solution(s) Replacing Laser/Optics assy resolved problem. Again use trou-

bleshooting process at the beginning of this section to help isolate problem.

Defect

Lighter Colours such as Yellow appear DARKER than they should be?

(CLJ - May 95)

Detail & Solution(s) Viewing with a magnifying glass it could easily be seen that too

much black was being mixed with yellow. The Black Developer assy was replaced to

resolved this problem. Also check the following if problem persists:

1. Check operating environment as per service manual section 2.

2. Run self-test, check humidity.

3. Check developer age as per self-test.

4. Print a solid yellow page, (use JetTest96) followed by a page of black & yellow

print. If problem appears on 2nd page, perform "Toner Concentration" test.

5. If overheads are being used, look up "Overhead Transparency Defects" in service

manual.

Defect

All Primary COLOURS (CMYK)APPEAR FAINT or FADED over the whole page

(Note Yellow is always difficult to see changes), composite colours (RGB) are not correct

shade?

(CLJ - Jan 95 - Martin Henshaw UK CE)

Detail & Solution(s) The following parts were replaced, HVPS, Developer PS, Both

Developers, Controller PCA, Formatter PCA, and finally the Laser/Optics assy, also the

optics glass was cleaned, but did not improve the faint image problem. It was found

that NVRAM locations 65 & 70 were corrupt, it is not known how this occurs.

Location 65 contained "0", it should be "2".

Location 70 contained "08", it should be "41".

CLJ / CLJ5 - Print Quality Problems (Con't)

4-2

These were reset to their correct factory setting and immediately the printed images

returned to its formative levels. Please be very careful correcting these values via

Service Mode, as the uninitiated can caused even more problems. Contact your local

RCE if in doubt.

Defect:

FAINT PRINT? Faint print or reduced print density in any or all primary

colors(CYMK).

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) Check the following:

1. Ensure Toner Hoppers are not empty. If empty refer to Error 24 message checks.

2. Perform Developer Rotation and Toner Concentration checks. The toner supply

mechanism may fail so that toner is always fed or not fed into the developers.

3. Check & clean Optics mirror.

4. Poor transfer causes faint irregular areas. Ensure Transfer assy connections are

clean & nothing inhibits this assy from fully seating. Implement a "Half Self-Test"

to split problem half (Development or Transfer).

5. If none of above items clears faint print defect replace the Print Drum.

Defect:

All Colours(CMYK) gradually becomes WASHED OUT, TONER STARVATION

(no error message)?

(CLJ5 - Mar 97 - Keith Scoons, UK)

Detail & Solution(s) - Replacing the Black or Color Developer assy clears the prob-

lem for a few days, but problem always returns. Examining concentration levels con-

firms gradual "Toner Starvation" on ALL Colours. The cause was traced to the Toner

Solenoid on the Developer Drive assy not operating. This was due to disconnected

cable connector CN811 on the Control PCA. How this came about is a mystery, the

implication was this printer exhibited this problem from new.

Defect

BLANK or Partially Blank Pages?

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) For this symptom check the following:

1. Developer Spacing rollers may not be seated firmly against the Print Drum?

Check Developers move freely.

2. Is the Cam timing correct? If Gear train has not been disassembled, check for

broken gears.

3. Check the Print Drum drive gears, use "Drum Rotational Check" to confirm its

movement.

4. Check Developers are rotating, may cause 18.5 or 18.6 errors, see previous entry in

this book for those errors.

5. Check Transfer Cam Solenoid is not stuck or broken. Use Service Mode Address

53 to check its operation.

6. Check Media quality, refer to paper specs guide.

7. Replace Laser/Scanner Assy.

8. Replace HVPS.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-3

Defect:

CYAN & MAGENTA BLEEDS into white narrow lines? Customer is producing

Pie-Chart with 4 segments of Green and Red area-fill. On top of these area-fill segments

they overlay text in white. These areas of text are surrounded a white-line rectangle.

These white- lines are very thin. Bleeding is most noticable in these thin white-lines.

(CLJ - Apr 96 - Shaun McManus UKCE)

Detail & Solution(s) - In the green segments the white lines had CYAN bleeding into

them, in the RED segments MAGENTA bled into the white lines. Replacing the Laser/

Optics assy dramatically improved this problem, but still very small amounts of bleed-

ing occurred.

Defect:

54.4 Error (Engine Error/Service) or/and Paper Jams or/and Print Quality Defects.

(CL5 - March 96 - Technical Update, Boise Division)

Detail & Solution(s) Customers are asked to periodically clean the optics glass (refer

to page 6-5 in ?HP Color LaserJet 5/5MPrinter User's Guide.) Customers also perform

this cleaning upon set-up of the printer (refer to step "D" in the getting started guide.)

To perform this cleaning it is necessary to use the ?optics cleaning tool? located inside

the. This tool is purple and is seated on the left-hand side Technical of the printer (just

to the left of the fuser assembly.) Customers are asked to replace or re-seat this tool into

its original location when they are done with the optics glass cleaning. Failure to re-

seat this tool properly can cause difficulty in closing the printer top cover. If the top

cover is forced down when the tool is incorrectly seated, the printer may fail to oper-
ate properly.

The tool is properly seated when it "snaps" into place.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-4

12345678901234567890123456789012123456789012345678901234567890121234567

BANDS / LINES Running Left to Right in Landscape mode

(Scan Direction)

1234567890123456789012345678901212345678901

Defect

"REPETITIVE MARKS or BANDS or LINES"? Defects which occur at regular

intervals.

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s)

There are no distance values for repetitive defects because they are usually at a dis-

tance which cannot be measured on a single page (Remember paper moves through

printer in landscape orientation). Only the Fuser may show a 94mm repetition or

Developer Drive Gears at 20mm. Look for defects that appear the same on each page

& where they are located. By putting 2 consecutive pages together this may show a

defect more clearly. The location can be the key indicator for what is causing the de-

fect. The "Repetitive Defect" page in the service manual shows the location or roller or

pick-up pawl which could cause defect.

Note repetition developed on the print drum will not appear in the same place. Any

defect on this assy will move across the page.

Defect

PRINTS a BAND of text

across page approximately

55mm wide? This band is in a

different position from page

Text here?

to page? See diagram opposite.

(CLJ - May 95)

Detail & Solution(s)

This problem was caused by a sticky Transfer Belt Timing Cam solenoid armature

(SL4). This solenoid did not stop the cam & gears from moving, allowing transfer belt

to move up & down. This is the reason why the image was approx 55mm wide and

moves up & down page.

Defect

BANDS in Scan DIRECTION & possible other P.Q. problems?

(Technical Update - Boise - July 96 - CLJ or CLJ5)

Detail & Solution If an incorrect Developer Drive assy is placed into a colour printer

(i.e. a CLJ assy is placed into a CLJ5, or visa-versa) the printer will continue to func-

tion. However, because the drive train gear for the hopper mechanism is different on

the 2 types of assys, a error outline to the left of this page may occur. ENSURE the

correct Developer Drive Assy is used

Part Numbers are:

CLJ (C3100A) - 110v = 07BA-1552KC

- 220v = 07BB-1552KC

CLJ5(3961A)

- 110v = 07BM-1552KC

- 220v = 07BP-1552KC

4-5

Defect

"LIGHTER BANDS in Scan DIRECTION" these can normally be seen when a

complete CYAN page is printed. These lighter lines approximately 1mm wide can be seen

approximately 20mm apart.

(CLJ - Dave Berry / Manchester - Jan 96)

Detail & Solution This problem may also be seen in processed Green and Blue, but use

the following steps to isolate:

1. Use JetTest96 to print off full page of each primary colour pages (CMYK).

2. If lighter bands as described above appear replace the Developer Drive Gear assy.

ENSURE to correct developer drive gear assy is used for this CLJ not the assy

used in the CLJ5.

Defect

"LIGHTER BANDS in Scan DIRECTION" these can normally be seen when a

complete MAGENTA page is printed. These lighter lines approximately 1mm wide

can be seen approximately 20mm apart.

(CLJ - Feb 97 - Graham Nicholson, Leeds, UKCE)

Detail & Solution This problem may also be seen in processed Green and Blue, but use

the following steps to isolate:

1. Use JetTest96 to print off full page of each primary colour pages (CMYK).

Replacing the Developer Drive Gear assy resolved this problem. ENSURE to correct

developer drive gear assy is used for this CLJ not the assy used in the CLJ5.

Defect

"THIN WHITE VERTICAL LINE" in SCAN direction. These appear in large area

fills. Customer using WORD document.

(CLJ5 - Jun 96 - Vince Bottacchi - Gatwick)

Detail & Solution(s) With Black-area fills, this line appeared 12mm from leading edge,

& started approx 75mm from LHS and continued over to RHS of page. With a magenta

area-fill, this time the line again started 12mm down but began on the LHS and contin-

ued for 75mm & stopped. This occurs again but 25mm down from leading Edge. Run-

ning a similar area-fill print job using PaintBrush, no problems. This is a problem with

the Driver contact the ECSC.

Defect

"RIBBING" or "Small Pitch Banding (SPB)" - A series of thin lines in parallel to

the Scan direction, approximately 1mm apart. It seems more noticable with light area

fills. Some printer may be worse than others.

(CLJ5 - May97 - Bob Edwards)

Detail & Solution(s) In most printers this phenomenon will be acceptable, but if a

customer is complaining try the following:

Implement the User Cleaning/Maintenance procedure.

If there is still a problem of SPB implement the following:

1. Run a test file called MLKGEAR.PCL, please contact your local Technical Support

engineer to obtain a copy.

2. Obtain examples of customer application where SPB occurs and sent to your local

Technical Support.

3. Ensure latest Driver is installed, take note of version number.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-6

CLJ / CLJ5 - Print Quality Problems (Con't)

4. Obtain which applications are being used, and their version numbers.

5. Include application file & print file which shoes SPB.

6. Include copy of self-test.

7. Then annotate this information send to your local technocal Support. Boise can

analyse the MLKGear test page and to advise if printer is within specification.

Note: See "Technical Update" in section 1. with subject "Test Files for Print Defects"

May 29, 1996 on MLKGear Test or on Boise Web site or contact your local RCE.

8. As customer to implement Software Cures for SPB. See software Cures for

"Small Pitch Banding" in section 1. or on Boise Web. Contact your local

Technical Support Engineer as this document should not be given to the customer

in its full entirety. Discuss your problem with your Technical Support Engineer

before contacting the customer. Always escalate.

Defect

BLACK/BROWN/ORANGE BANDS? Horizontally or Vertically.

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) Ambient light getting inside printer. Keep away from strong

sunlight. Generally print-drums will recover, but useful life may be reduced.

Other causes may be:

1. Check Print Drum does not have accumulated under housing.

2. Check that transfer Assy is clean.

3. If problem still exists after 10 pages of Self-test replace Print Drum.

4. Check HVPS connections are clean.

4-7

12345678901234567890123456789012123456789012345678901234567890121234567890123456

1 2345678901234567890123456789012123456789012345678901234567890121234567890123456

12345678901234567890123456789012123456789012345678901234567890121234567890123456

Lines or Bands appearing on the page in the direction of paper movement may

have several causes. To help isolate the cause use the following process:

1. Use JetTest96 to print full CMYK & RGB pages and examine each for defect.

2. Does band(s) or line(s) run from top to bottom of page when viewed in landscape,

in any or most colours (as example below). If so:

* Clean Laser / Scanner mirror.

* Check for debris in fuser assy or scored fuser roller.

* Clean Charging corona on Print Drum. (Only New Style drum). Drum may

require replacement, but exhaust other possible causes first. Is it an old

drum?

* Clean Transfer corona, replace if necessary.

* Laser/Scanner assy may require replacement. (see "White Streaks" entry on

following page.

3. Does band(s) or line(s) run from top to bottom of page when viewed in landscape,

in only some colours. This could be caused by a large foreign particle being stuck

between developer sleeve & its metering rod. See entry on next page titled "Hori-

zontal Line" on next page. Also, see Page 7-73 in service manual for greater detail.

Defect

"REPETITIVE MARKS or BANDS or LINES"? Defects

which occur at regular

intervals.

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s)

There are no distance values for repetitive defects because they are usually at a distance

which cannot be measured on a single page (Remember paper moves through printer in

landscape orientation). Only the Fuser may show a 94mm repetition or Developer

Drive Gears at 20mm. Look for defects that appear the same on each page & where

they are located. By putting 2 consecutive pages together this may show a defect more

clearly. The location can be the key indicator for what is causing the defect. The "Re-

petitive Defect" page in the service manual shows the location or roller or pick-up pawl

which could cause defect.

Note repetition developed on the print drum will not appear in the same place. Any

defect on this assy will move across the page.

Defect

Prints a LIGHTER BAND of

COLOUR in solid coloured

areas? Does not occur in Black?

Solid Area

(Russell Curran - April 95)

Fill

(CLJ)

Lighter Band

Detail & Solution(s)

The resolution was to simply clean laser exit mirror. See page 7-81 in Service Manual.

BANDS/LINES/STREAKS Running Up & Down in Landscape mode

(Paper Direction)

4-8

Defect

"LIGHTER BAND" could be seen in the middle of the page, in paper direction movement.

(CLJ - May 95)

Detail & Solution: This was a new printer straight out of the box with supplied Drum

unit. The PC Drum unit was found to be the cause of this problem.

Defect

"LIGHTER BAND" or "STREAKING", especially when lighter shades or colours

are used as backgrounds (e.g. a 20% grey) , in paper direction movement.

(CLJ/CLJ5 - May97 - Bob Edwards)

Detail & Solution: At this time there has been an increase with the incidents of this

problem, even when new PC Drum assys are replaced. It is known there is contamina-

tion of the PC Drums charge corona. It is also known that cleaning this corona will

improve or even clear this problem. Boise Division are investigating this issue, but until

further updates please implement the following procedure to ensure your problem is in

fact a PC Drum issues as described.

1. Clean Optics window, check if streaking problem is still apparent.

2. Is streaking associated with one particular primary colour? If so check

developer in question, is there any contamination of the developer sleeve that

could attribute to the lines you see on printed page?

3. Clean PC Drum Corona with built-in cleaner. If that fails use a cotton swab and

alcohol to carefully clean this wire (note it is difficult to see, so beware you may

break it). Try another PC Drum assy, does position of streaking change? With new

PC Drums it is recommended to use a cotton swab and alcohol to clean this wire,

not the cleaner as this is quite harsh. If problem does not clear, but defect moves

with replacement drum, contact your local Technical Support.

Defect

"WHITE STREAKS?" These are seen as vertical lines when print-out is viewed in

landscape mode. (i.e. In direction of paper movement)

(Boise Technical Update- CLJ5 - Jun 95)

Detail & Solution(s):

Very thin fine lines with a line width of 1mm or less, these lines are caused by some

types of contamination in the laser assy or developer. Those streaks which track down

the entire page are most likely caused by contamination of the laser assy. Those

which appear to cut through only 1 or 2 colours on the page are most likely to be

developer problems.

Wide Bands (6-8mm), which appear white or faded. These bands do NOT have a darker

area on each side of the band. This is normally caused by a dirty optics glass (Clean)

or by a defective laser/optics assy.

Wide bands (6-8mm), which appear to be white area bordered by darker bands on both

sides. These streaks are most likely due to problems with the charging corona on the

Drum.

Note: Always perform standard cleaning procedures on the printer:

1. Clean Optics glass with tool provided.

2. Clean primary corona wire with swab and Isopropyl or built-in cleaning

tool with new style drums.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-9

3. Clean transfer corona wire with built-in tool.

It is possible to clean the optics glass of the laser/optics assy by removing it. This after

removing both the Drum & 2 developer assys. Carefully remove 2 screws holding op-

tics glass in place. Remove glass by twisting it to the right. Clean with standard glass

cleaner and then blow it off using compressed air. If this does not resolve problem it

will be necessary to replace the laser/optics assy (P/N = 07BA-6501KC)

See CLJ5/5M Boise Technical Update, dated June 5th 1996 for greater detail.

*******************(HP Confidential)*********************

Defect

"YELLOW or BLACK STREAKS"? in the direction of paper movement (horizon-

tal)

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) These can appears as thin horizontal lines in both colours. This

problem can be caused by:

* Print Drum has passed its maximum life

* Printing in low humidity environments for extended periods.

* Oxide build-up on the Print Drum Charging Corona wire.

Replace Print Drum if problem persists. See Page 7-87 of service manual for detail.

Defect

"HORIZONTAL LINE" in one Colour, in direction of paper movement?

(CLJ - Jun 95)

Detail & Solution(s) In Black areas white lines may appear in the direction of paper

movement. This can occur when a relatively large foreign particle becomes stuck

between the Black Developer sleeve & the metering rod. Remove the black developer

and turn gears counter-clockwise to see if the particle can be removed. If not replace

Developer Assy.

Horizontal lines in the coloured areas, in direction of paper movement occur for the

same reasons as described for the black developer. Lines in the primary colours will

appear white, whereas lines in processed colours will not be white. e.g. a particle in

Magenta will create a white line, whereas colours which use magenta will be missing,

leaving a yellow line in a red area or a cyan line in what should be a blue area. Re-

place Colour Developer if particles cannot be removed.

Defect:

"HORIZONTAL LINE(s) in ALL Colours", in direction of paper movement?

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s)

1. Fuzzy lines in all colours result from toner-dust on the Laser/Scanner window/

mirror.

2. Charging corona contaminated?

3. See above for white line in only one colour.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-10

Defect:

THIN WHITE LINE in direction of paper movement, can only be seen when

LIGHTER SHADES of colours are printed (i.e. Light Blue).

(CLJ5 - Feb 97 - Paul Fraser, London)

Detail & Solution(s) - This print defect does not appear in heavier colours (i.e. RGB).

Replacing Laser/|Scanner assy resolved this problem.

Defect

BLACK/BROWN/ORANGE BANDS? Horizontally or Vertically.

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) Ambient light getting inside printer. Keep away from strong

sunlight. Generally print-drums will recover, but useful life may be reduced.

Other causes may be:

1. Check Print Drum does not have accumulated under housing.

2. Check that transfer Assy is clean.

3. If problem still exists after 10 pages of Self-test replace Print Drum.

4. Check HVPS connections are clean.

4-11

CLJ / CLJ5 - Print Quality Problems (Con't)

12345678901234567890123456789012123456789012345678901234567890121234567890

SMEARED PRINT? Text of Graphic Images are smeared or bands ap-

pears across which appear smeared. (Portrait or Landscape)

When smeared printouts occur, examine defective printed pages and check the

following:

1. Check paper path is clean

2. Check that bent corners ("dog ears") on the page are not occurring, suspect media.

or check paper is loaded correctly in paper tray.

3. Check no paper has wrapped around Print Drum, drum-wrap sensor may be faulty.

4. Does media meet paper specifications?

5. Check fuser assy does not have a build-up of toner at its input.

6. Check Pre-transfer brush for build-up of toner.

7. Is toner being fused into paper? Does media meet paper specs? or faulty fuser assy.

8. Follow entries below on "Smeared Print" and "Leading or Trailing Edge Smear"

Defect

"SMEARED PRINT", in the direction of paper movement

(CLJ / CLJ5)

Detail & Solution(s) Cleaning Blade failures are characterized by light smears in the

horizontal axis or in direction of paper movement. This problem may be more pro-

nounced on heavy toner filled areas and multo-colour pages. Replace Photoconductor

Drum, CLEANING BLADE Failure? See page 7-80 service manual

Defect

"13.1 CLEAR DRUM WINDING JAM"? Then printer may be powered down then up

again, a "13.5 CLEAR FUSING JAM "(fuser jam for CLJ), or "ORANGE/BROWN page"

may occurs, or "SMEARED Print" may occur, or appear not to be "FUSING Toner" to

the page.

(CLJ - Jan 96 - James Lomas -Boise)

Detail & Solution(s) When the 13.1 error occurs and then if the side door or top cover

is opened without clearing the paper jam (PJ), the unit believes the PJ has been cleared

and unit will come ready. When the printer starts running, the paper left in the unit will

be pushed further into the drum area. However, this paper may not stop future printing.

It may do the following:

* Block the AC corona, thus preventing charging giving orange/brown pages.

* or, it may SMEAR the print on the print drum

* or, it may give the appearance of Poor Fusing.

If the above is suspected implement the following:

1. Instruct the customer to look closely at the print drum area and ensure it is clear

of paper.

2. Service personnel should also check drum is clear of paper.

Defect

"LEADING or TRAILING EDGE SMEAR" in direction of paper movement?

(CLJ / CLJ5)

Detail & Solution(s) Toner accumulation on the paper charging brush causes this

problem. This can cause the leading or trailing edge of the page to have a smeared

band with loose toner. See page 7-82 of service manual.

1. Thoroughly clean printer.

4-12

2. If media size has been changed(e.g. legal or Exec) print 5 to 10 pages to clear

smearing.

3. If a paper jam has recently occurred or the printer had a multi-feed print 5 to 10

pages to clear smearing.

4. Replace Paper-Charging Brush if pbm persists. (P/N = 07AA45567KC)

Defect

"MOTTLED Print Output and SMEARED print in direction of paper movement?

(CLJ - Sept 95)

Detail & Solution(s) Customer was printing slides with a Dark Blue background. The

last half of the print, in direction of paper movement, appeared Mottled. That is the

toner was not laying uniformly across the page. i.e. the white paper could be seen

through the blue background. Also a smearing occurred, again in direction of paper

movement. This time colour was reported to be Black. Cleaning the Laser Mirror and

the transfer belt resolved problem.

Defect

Customers may see a LIGHT FILM or SMEAR's or STREAK's on the back of their

Overhead Transparencies?

(CLJ - Apr 96 - Boise Technical Update)

Detail & Solution(s) This is due to deposits of lubricant being left on the media by the

exit roller assembly. These streaks can be wiped off the media with tissue and will not

be projected.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-13

CLJ / CLJ5 - Print Quality Problems (Con't)

12345678901234567890123456789012123456789012345678901234567890121234567890

MOTTLED or SPECKLED or RING MARKS Printed paged?

Defect

Coloured Print-outs appear MOTTLED or SPECKLED? This defect appears as

splotchy light areas in thedarker colours. (Poor Transfer?)

(C3100A - Jun 95)

Detail & Solution(s) The following may cause this pbm:

1. Check for excessive moisture in media? Store media correctly, try known good media

2. Check Media is within specification. Rough or heavy can cause this problem.

3. Check self-test for Low humidity. Check environment for high humidity.

4. Clean transfer corona wire, reseat transfer assy.

5. Select ColourSmart from driver menu. Business Blue has more constant transfer

characteristic.

6. Change half-tone patterns. Some half-tone patterns make poor transfers more

visible.

7. Replace Transfer assy if problem persists.

Defect

Coloured Print-outs appear MOTTLED or SPECKLED? this occurs on Transparen-

cies ONLY.

(CLJ5 - Sept 95 - Andy Oldham UKCE)

Detail & Solution(s) This problem occurred on transparencies only on RHS of page

as viewed when standing at the front of the printer (remember transparencies eject only

from the front of the printer). With this CLJ5 the PQ problem extended approx 100 to

120mm from the RHS of the page towards the centre of the printer. The Mottled/Speck-

led print quality problem shows most readily in colour area-fills, especially where

composite colours were used.

Implement half self-test to determine in which part of the printer the problem

occurs (i.e. during printing cycle open lid and stop movement of paper). Check if

problem occurs in PC Drum, or Transfer Belt, or Fuser area's. In this case the trans-

fer belt caused the problem and had become contaminated on its RHS , it was re-

placed.

Defect

"MOTTLED Print Output and SMEARED print in direction of paper movement?

(C3100A - Sept 95)

Detail & Solution(s) Customer was printing slides with a Dark Blue background. The

last half of the print, in direction of paper movement, appeared Mottled. That is the

toner was not laying uniformly across the page. i.e. the white paper could be seen

through the blue background. Also a smearing occurred, again in direction of paper

movement. This time colour was reported to be Black. Cleaning the Laser Mirror and

the transfer belt resolved problem.

4-14

Defect

RING MARKS / CIRCLES, these can appear randomly? These are small ring marks

are small, approximately 2.5mm (1/10 inch) rings of toner, sometimes with a dot in the centre.

In solid fill areas these ring marks can appear as circles, where one of the colour planes is

missing.

(CLJ / CLJ5)

Detail & Solution(s) Sometimes these ring marks will form a "chain" across the page

in the direction of paper movement. Ring marks are caused by an oversized conductive

particle which bridges the 0.5mm gap between the photoconductive drum and a devel-

oper sleeve. This causes an arc or discharge. These random marks mat appear at any

time in the life of a developer, but most often seen in the early developer life. Normally

this problem should

clear within 30 pages of colour printing. The expected ring mark rate is less than 40 in

40,000 pages, but remember it is common to see 10 or 20 in the first few hundred

pages.

Actions:

1. DO NOT replace Developer assy, this often may make it appear worse.

2. DO NOT replace Print Drum Assy, this will have no beneficial effect.

3. If the ring mark rate is >40 / 40,000 pages, look for external sources of conductive

contamination. Ensure Toner Hopper covers are sealed.

4. Ensure environment is clear of airborne conductive contaminates

Defect

Halo Around Dark Images on Lighter Background

(CLJ5/5M - Feb97 - Sylvia Cohen - LaserJet Technical Marketing for CCD)

Detail & Solution(s) This will happen in all applications using both PCL and Post-

Script drivers. Adding dark objects (circles, rectangles, etc. to a light background of

the same color exhibits a white gap between the object and the background. For

instance, if you have a light gray background and place a black object within that

background, you will see a halo around that object. You will also see this problem if

you use any light-coloured background with a dark image of that same color on it.

Cause: An electrical field line in between the light area and the dark area causes the

toner which would normally develop in the light area to develop in the dark area.

You will not see this happen if you have a magenta object in a yellow background.

See example below: The reason is that a different developer roller is being used for

the imagining of each color. If you see a gap between the image and the background

in this case, it could be a registration problem.

Workaround: A workaround is to use a darker gray for the background or use a

different color. Or, if you are using a light blue background and the object is dark

blue, make the background a darker blue.

Defect

When printing RADIAL FILLS ONLY adds small very thin short Black lines into

the area of the radial fill? Linear or conical fills were OK.

(CLJ - Nov 96 - Steve Oakes, UK)

Detail & Solution(s) - The customer was running Windows 3.1 and using the parallel

port. The fault appeared in both CorelDRAW 5 and FREELANCE 2.1. The problem was

visible in any colour used in the radial fills and does occur on both CLJ & CLJ5's. The

resolution for this problem was to update driver for CLJ to version 1.3 or greater.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-15

Defect:

Halo Around Dark Images on Lighter Background?

(CLJ5/5M - Sylvia Cohen - LaserJet Technical Marketing for CCD)

Detail & Solution(s):

Applications: This will happen in all applications using both PCL and PostScript

drivers.

Problem:

Adding dark objects (circles, rectangles, etc. to a light background of the same

color exhibits a white gap between the object and the background. For instance, if you

have a light gray background and place a black object within that background, you will

see a halo around that object. You will also see this problem if you use any light-col-

oured background with a dark image of that same color on it.

Cause:

An electrical field line in between the light area and the dark area causes the

toner which would normally develop in the light area to develop in the dark area.

You will not see this happen if you have a magenta object in a yellow background.

See example below: The reason is that a different developer roller is being used for the

imagining of each color. If you see a gap between the image and the background in

this case, it could be a registration problem.

Workaround:

A workaround is to use a darker gray for the background or use a different

color. Or, if you are using a light blue background and the object is dark blue, make

the background a darker blue.

Defect:

HALO Effect around Dark Colours?

(CLJ5 - Jun 97 - Cindy Martin, Boise NEST)

Detail & Solution(s): - This UK customer site that was experiencing a "halo effect"

around dark colors on a lighter background. In my testing I found that the Microsoft

Universal Driver version 3.78 did improve the halo effect. I would encourage the

customer to install this driver and do some prints to see if it meets their needs. While the

MS driver improves the halo effect, the resolution is very different than the HP PCL

version 2.0 driver.

To install this driver in win 95:

* start/settings/printer/add printer

* In the Add Printer Wizard move through the screens until you see a

Manufacturer/Printer screen. On this screen select "HP" in the Manufacturer,

and select HP Color Laserjet (MS). Proceed through the screens to install the

driver.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-16

CLJ / CLJ5 - Print Quality Problems (Con't)

Tips For Decreasing SKEWING

Some customers are very sensitive to the layout of their printed page or who are

attempting to use a CLJ5/5M for applications which require exact page to page registra-

tion may sometimes complain about "skewing" or "poor registration" on their print

outs. The following will provide you with some options for reducing the amount of

Skew, thus hopefully satisfying the customer's needs.

Media Registration Specifications for Skew:

All lines along the long dimension of Executive, A(Letter), and A4 and all lines

along the short dimensions of Legal, B, and A3 media will be parallel to the leading

edge within:

1.2mm over a 200mm length or 0.6%

1.5mm over a 250mm length or 0.6%

Note: (Bear in mind paper moves through printer in landscape orientation)

With Letter size paper this equates to a maximum skew of 1.7mm along the leading

edge of the paper.

With A4 size paper this equates to a maximum skew of 1.8mm along the leading edge

of the paper.

If the amount of skew is outside specifications for the printer, then check or action the

following:

1. If skewing is occuring on only OHT's, check that customer is using only HP Color

LJ Transparency Film.

2. Is skew consistent from page to page?

If the skewing is consistent (2) from page to page (i.e. the amount of skew is

exactly the same and the skew is in the same direction) this may be an indication of

improper alignment of the Laser/Scanner assy. Whilst adjustment is considered a "fac-

tory adjustment, it is possible to adjust. Please contact your local Technical support for

more detail.

3. If the media is skewing ONLY when fed from RFU, check the paper guides on the

unit to ENSURE they are correctly adjusted. See Service Note C3119A-01

4. Does the skew occur from both I/P sources (front tray and RFU)?

If the skewing is consistent and occurs when paper is fed from BOTH paper

sources, check the following:

* Inspect Mylar strip a rear of printer which is used to guide paper onto the

registration plate. This strip should be completely smooth and free from any

damage/indentations. Replace if damaged.

* ENSURE the registration shutter is completely retracting and not dragging on

the media. Check by manually retracting this shutter and visually inspecting that

the tabs are fully lowered beneath the registration plate.

1234567890123456789012345678901212345678901234567890123456789012123456789012

IMAGE SKEW or REGISTRATION or MARGIN Problems

4-17

Text has moved up and off the

leading edge of the page?

Paper

Movement

* Check to see that the media is flush against the registration shutter tabs. To do

this, power off printer just when paper has reached these tabs and before it

begins the transfer process. This is a "little tricky" and may require several

attempts. The media should be flush against the tabs and slightly "bowed up".

* Check the feed rollers and the registration rollers for any type of contaminates

and/or build-up. Clean or replace if necessary.

* Check the flatness of the upper registration plate. To do this remove the black

developer and visually inspect the upper registration plate from the side door.

If "bowed" down replace this plate.

* Inspect the dust cover located above the pressure rollers. This cover is held in

place by 2-sided tape. Ensure this cover has NOT SHIFTED in position, thereby

causing drag on pressure rollers.

* Inspect Mylar strip on the transfer assy and the paper charging brush. If

damaged replace.

* Also make sure the cleaning tool on the transfer assy is parked in its "Home"

position.

Defect

"IMAGE SKEW"? Printed page does not run parallel with vertical & horizontal edges

of the physical page.

(CLJ / CLJ5)

Detail & Solution(s) The spec for image skew is less than 1.5mm over a distance of

250mm or 0.6%. Image Skew may be caused by:

1. Burrs on Paper Registration Plate.

2. Not feeding from paper trays correctly, check tray-side adjustments, paper stack

tabs.

3. Quality of media, check for "folding" or "nicking" tendencies.

4. Check Paper pick-up rollers for wear.

5. Check paper tray transport rollers for wear.

Defect

"75mm MARGIN on LHS when printing colour in PostScript mode?

(CLJ - Apr 95 - Keith Scoons UK)

Detail & Solution(s) PCL files were OK. Initiating a COLD-Reset resolved this prob-

lem?

Defect

Incorrect REGISTRATION?

(Late or Early Print)

(CLJ - Jun 95)

Detail & Solution(s)

Possible causes:

1. Check Registration Plate for Burrs.

2. Ensure Registration Plate moves freely throughout its range of motion. If it sticks,

check solenoid linkage. Replace solenoid & linkage if necessary.

3. See page 7-127 Incorrect Registration in Service manual for more detail. For small

amounts of mis-registration use service mode REGISTER ADJUST to move image

4-18

CLJ / CLJ5 - Print Quality Problems (Con't)

up and down page.

4. Check Cam Timing in section 6 of service manual

Defect:

"MISREGISTRATION" in both Vertical & Horizontal planes from the Rear Feed

Unit only?

(CLJ- July 95 - Richard Bacon UKCE)

Detail & Solution(s) The Register Adjust Address parameters 74 & 75 (page 7-24 in

Service Manual) were set to zero. CE set these to default 74 = 48 & 75 = 43, this re-

solved problem.

Defect:

IMAGE SLIPS Down Physical Page, i.e Misregistration? As veiwed in Landscape

orientation, i.e. in paper direction movement.

(CLJ- Jun 97 -Hubert Villiers, UK)

Detail & Solution(s) - The SL2 Registration solenoid was found to be contaminated.

Cleaning SL2 Solenoid resolved this problem.

4-19

CLJ / CLJ5 - Print Quality Problems (Con't)

Defect

"WAVY CHARACTERS"? Characters do not appear upright

(CLJ / CLJ5)

Detail & Solution(s) This problem is caused by "scanner wobble". Mechanical instabil-

ity in the scanner or optics assy can cause this fault. If failure repeats replace Laser/

Scanner Assy.

Defect

"WAVINESS" patterns on Overhead Transparencies? These waves appear in a

nearly

horizontal pattern as viewed in landscape mode. These waves may be so pronounced to

effect the projection of text and/or images onto the screen.

(Boise Technical Update- CLJ5 - Sep 96)

Detail & Solution(s)

One cause may be the temperature of the fusing assy. The upper roller of the fusing

assy has a temperature which is too high for correct processing of overhead transpar-

encies. The temperature is controlled by FW located on the Controller Board. The FW

code has been changed to lower the temperature of the upper fusing roller.

This effect will only occur on a few printers, but also note that some waviness will occur

on all transparencies.

A second cause may be the media used. There have been 2 bad lots of C2936A (A4)

transparency media which were produced at the end of last year (1995).

Actions to be taken:

1. Verify customer is using only correct transparency media for the Colour LJ5/5M

(P/N - C2936A (A4) or C2943A (Letter)).

Check lot numbers on bottom of box for C2936A, bad lot numbers were:

23595**DX

26396**DX Note ** these values will vary

2. Ensure customer is not handling the transparencies whilst still hot.

3. Lastly if steps 1 & 2 fail then replace ROM on Controller board This has to be

obtained from Boise, contact your local technical support engineer.

See CLJ5/5M Boise Technical Update, dated June 5th 1996 for greater detail.

*******************(HP Confidential)*****

123456789012345678901234567890121234567

WAVEY TEXT & IMAGES

CLJ / CLJ5 - Print Quality Problems (Con't)

4-20

Defect

BLANK or Partially Blank Pages?

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) For this symptom check the following:

1. Developer Spacing rollers may not be seated firmly against the Print Drum?

Check Developers move freely.

2. Is the Cam timing correct? If Gear train has not been disassembled, check for

broken gears.

3. Check the Print Drum drive gears, use "Drum Rotational Check" to confirm its

movement.

4. Check Developers are rotating, may cause 18.5 or 18.6 errors, see previous entry in

this book for those errors.

5. Check Transfer Cam Solenoid is not stuck or broken. Use Service Mode Address 53

to check its operation.

6. Check Media quality, refer to paper specs guide.

7. Replace Laser/Scanner Assy.

8. Replace HVPS.

Defect

"BACKGROUND TONER SCATTER" around characters or Graphic images?

(CLJ / CLJ5)

Detail & Solution(s) This defect appears has haze around the text or graphics. It can

occur with any colour. Use the following to assist troubleshooting:

1. Thoroughly clean printer first.

2. Does media meets paper specs, especially recycled paper.

3. Check humidity reading on Self-Test is within specifications, see Humidity Sensor

test on page 7-16 in service manual if ambient humidity OK.

4. Replace any developer past their maximum life.

5. Toner concentration too high. This can occur if both the Fuser & developers are

new. This should correct itself after 100 pages. If it does not refer to Developer

Rotation & Toner Concentration info listed under faint print in servicemanual.

Some reference can be found in this section of this book.

6. The Transfer Belt is not fully engaged with

print drum, refer to "Checking the Cam Timing" in service manual.

Note: Feel page for gritty carrier. Loose carrier on the page indicates a poor connec-

tion to the Print-Drum charging grid. Pull spring contacts up to with in 1mm of the top

of the plastic housing. If problem persists, replace Print-Drum.

Defect

Self-Test Page is DARKISH BROWN all over, can still see text and colour bars

underneath?

(CLJ / CLJ5)

Detail & Solution(s) This problem will occur if top covers are off and there is a lot of

ambient light. This is normal, do not attempt to repair. Keep away from strong sunlight.

Generally print-drums will recover, but useful life may be reduced.

4-21

123456789012345678901234567890121234567890123456789012345678

MISCELLANEOUS COLOUR Problems

CLJ / CLJ5 - Print Quality Problems (Con't)

4-22

Defect

BLACK/BROWN/ORANGE BANDS? Horizontally or Vertically.

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) Ambient light getting inside printer. Keep away from strong

sunlight. Generally print-drums will recover, but useful life may be reduced.

Other causes may be:

1. Check Print Drum does not have accumulated under housing.

2. Check that transfer Assy is clean.

3. If problem still exists after 10 pages of Self-test replace Print Drum.

4. Check HVPS connections are clean.

Defect

"13.1 CLEAR DRUM WINDING JAM"? Then printer may be powered down then up

again, a "13.5 CLEAR FUSING JAM "(fuser jam for CLJ), or "ORANGE/BROWN

page" may occurs, or "SMEARED Print" may occur, or appear not to be "FUSING Toner"

to the page.

(CLJ - Jan 96 - James Lomas -Boise)

Detail & Solution(s) When the 13.1 error occurs and then if the side door or top cover

is opened without clearing the paper jam (PJ), the unit believes the PJ has been cleared

and unit will come ready. When the printer starts running, the paper left in the unit will

be pushed further into the drum area. However, this paper may not stop future printing.

It may do the following:

* Block the AC corona, thus preventing charging giving orange/brown pages.

* or, it may SMEAR the print on the print drum

* or, it may give the appearance of Poor Fusing.

If the above is suspected implement the following:

1. Instruct the customer to look closely at the print drum area and ensure it is clear

of paper.

2. Service personnel should also check drum is clear of paper.

Defect

"GHOSTING"? Same image appears, somewhat lighter that original developed image,

but further down the page in the direction of paper movement.

(CLJ / CLJ5)

Detail & Solution(s) This appears as a latent image of the previously printed images

from last page. It may also look like a repetitive defect. Possible causes:

1. Clean printer thoroughly.

2. Check customer is not printing same pattern repeatedly. Repeat patterns WILL

SHORTEN life o Print Drum.

3. Print Drum has passed its maximum life, replace.

Defect

"LASERJETS used for CAMERA-READY work"?

(CLJ / CLJ5 - Jun 95)

Detail & Solution(s) It is up to the customer to decide on the suitability of a LaserJet

for Camera-Ready work. They MUST decide whether the LaserJet meets their needs.

Some may find it does meet their needs, whilst other with more stringent criteria may

not. Camera-ready work may highlight problems with small white voids or holes in

black areas or perhaps amplify skew problems, etc. HP does NOT recommend or dis-

courage LaserJets used for this type of work, but leaves it to the customer to decide on

suitability. See Section 1 for more detail of this book.

Defect

"Parts of LINES MISSING"?

Occurs in all colours.

Site Code Site Name Expenditure

Delivered Price

(C3100A - Aug 95)

CD001 B'ham

28.441

550,000

(M.Henshaw - Stevenage)

Total:

Detail & Solution(s)

The missing portions of lines shown

above was random and very intermittent.

It can appear when printing any colours. Printing the same page again did not repro-

duce the pbm. This problem was caused by the application, in this case MicroSoft

Office for Windows. PageMaker OK. By creating a 25% area fill over whole page ,this

showed the pbm. Use JetTest96 to print off this page.

Defect

CYAN & MAGENTA BLEEDS into white narrow lines? Customer is producing Pie-

Chart with 4 segments of Green and Red area-fill. On top of these area-fill segments they

overlay text in white. These areas of text are surrounded a white-line rectangle. These white-

lines are very thin. Bleeding is most noticable in these thin white-lines.

(CLJ - Apr 96 - Shaun McManus UKCE)

Detail & Solution(s) In the green segments the white lines had CYAN bleeding into

them, in the RED segments MAGENTA bled into the white lines. Replacing the Laser/

Optics assy dramatically improved this problem, but still very small amounts of bleed-

ing occurred.

Defect

"WAVEY" patterns on Overhead Transparencies? These waves appear in a nearly

horizontal pattern as viewed in landscape mode. These waves may be so pronounced to

effect the projection of text and/or images onto the screen.

(Boise Technical Update- CLJ5 - Jun 95)

Detail & Solution(s)

At this time the cause is thought to be the temperature of the fusing assy. The fusing

temperature is controlled by FW located on the Controller Board. The FW code has

been changed to lower the temperature of the upper fusing roller.

Actions to be taken:

1. Verify customer is using correct transparency media for the Colour LJ5/5M (P/N

C2932A)

2. Replace ROM on Controller board

See CLJ5/5M Boise Technical Update, dated June 5th 1996 for greater detail.

*******************(HP Confidential)*****

Defect

CLJ / CLJ5 - Print Quality Problems (Con't)

Missing Portion of Line

4-23

Prints OK in Monochrome, but not with several other colours?

(CLJ - Oct 95 -Pierre-Andre Buetzberger - Switzerland)

Detail & Solution(s) It was found that the gear (07AA77310KC item 5 on page 8-10

combined service manual) was damaged. Replacing this gear resolved the problem.

Defect

When printing RADIAL FILLS ONLY adds small very thin short Black lines into

the area of the radial fill? Linear or conical fills were OK.

(CLJ - Nov 96 - Steve Oakes, UK)

Detail & Solution(s) - The customer was running Windows 3.1 and using the parallel

port. The fault appeared in both CorelDRAW 5 and FREELANCE 2.1. The problem was

visible in any colour used in the radial fills and does occur on both CLJ & CLJ5's. The

resolution for this problem was to update driver for CLJ to version 1.3.

CLJ / CLJ5 - Print Quality Problems (Con't)

4-24

CLJ / CLJ5 - Paper Path Problems

5-1

Defect

"13.1 CLEAR DRUM WINDING JAM? This error indicates paper is beginning to

wrap around the Print drum.

(CLJ / CLJ5 - Jun 96)

A test drum which has the fusible link already blown can be installed to verify failures

such as repetitive print defects. DO NOT print no more than 50 pages with the test

drum. The test drum may cause this error. It occurs, use "Service Mode Status/Test

address 47" to calibrate the Drum Winding Sensor. It is necessary to recalibrate this

sensor when installing the original PC Drum. If the PC Drum is replaced due to it being

defective, the drum winding calibration is automatically performed.

Defect

"13.1 CLEAR DRUM WINDING JAM"? Then printer may be powered down then up

again, a "13.5 CLEAR FUSING JAM "(fuser jam for CLJ), or "ORANGE/BROWN page"

may occurs, or "SMEARED Print" may occur, or appear not to be "FUSING Toner" to the

page.

(CLJ - Jan 96 - James Lomas -Boise)

Detail & Solution(s) When the 13.1 error occurs and then if the side door or top cover

is opened without clearing the paper jam (PJ), the unit believes the PJ has been cleared

and unit will come ready. When the printer starts running, the paper left in the unit will

be pushed further into the drum area. However, this paper may not stop future printing.

It may do the following:

* Block the AC corona, thus preventing charging giving orange/brown pages.

* or, it may SMEAR the print on the print drum

* or, it may give the appearance of Poor Fusing.

If the above is suspected implement the following:

1. Instruct the customer to look closely at the print drum area and ensure it is clear

of paper.

2. Service personnel should also check drum is clear of paper.

Defect

"13.5 CLEAR FUSING JAM"? Paper did not arrive at sensor PS1(exit) in time, this

occurs at power-up. TOP LID MUST be opened and closed to clear message.

(CLJ / CLJ5 - Mar 97)

Detail & Solution(s) - This is obviously a false paper jam, PS1 has failed to detect

media within the predetermined time out paper has jammed within the fuser area. In

this situation C will show if PS1 sensor is OK. Do NOT replace Control bd, Fuser assy,

transfer assy or PS1 sensor, firstly check the following:

1. Use internal service test (Status / Test 22 addr 22) to check out PS1 sensor.

2. If PS1 is OK, check that the LHS and top interlock switches are not overridden or

faulty. Do you get "door open" messages when doors / lid is opened? The I/L's

could be damage. It is normal that these I/L's cause this 13.5 PJ.

Note: Once the printer detects a PJ, it must sense that a door has been opened to

clear jam. If door is not detected open the 13.5 PJ message will remain.

3. Transfer Assy installed correctly.

4. See Error 55.7 in this section of the "C3100A - Faults with Error Numbers", also

refer to service note C3100A-04.

5-2

Defect

"PAPER JAMS or MULTIPLE FEEDS" when feeding media from the Main Paper

Cassette?

(CLJ / CLJ5 - Tony Barrett - Boise - Aug 96)

Detail & Solution(s) Get customer to verify that there are 2 coil springs under the lift-

plate in the cassette. These coils can be clearly seen in Fig 8-16 in any Colour LJ

Service Manual. Get customer to remove cassette and look at the rear end of this assy

and check both springs are there. Rather than replace the whole cassette assy, if

spring is missing, a P/N is now available (05AA47090KC). Send spring to customer

rather that making a CE site visit.

Defect

"PAPER JAMS/MISFEEDS from RFU ONLY"?

(CLJ - July 95)

Detail & Solution(s) This was caused by contaminated RFU paper pick-up feed

rollers. The resolution was to simply clean these rollers. In the 2 cases we have seen so

far a "shiny paper" was used and this was thought to be the cause of the contamination.

Please note there was NO problem feeding from paper trays.

Defect

"INTERLEAVING" different types of paper in same paper tray?

(CLJ / CLJ5)

Detail & Solution(s) For the general HP statement on "Interleaving Paper" please

reference HP Reference Guide (Green Book) section 3.

Defect

PAPER JAMS/MISFEEDS/SKEWING caused by customers practice of INTERLEAV-

ING paper in one Paper Tray?

(CLJ / CLJ5)

Detail & Solution(s) Interleaving, where a variety of different paper is placed in the

paper tray, is not recommended by HP. This practice is likely to lead to Paper jams &

Misfeeds

Defect

Customer is RE-FEEDING paper via the paper trays? The customer may either

reprint on top of a previously printed page or turn paper through 180 degrees and print

on the rear side (Duplex printing).

(CLJ / CLJ5)

Detail & Solution(s) Duplex print is NOT supported on this printer. It can cause

paper jams at the input and exit areas, it can also damage the printer.

Defect

Customer is printing on a PHOTO-COPYING machine, then feeding this page through

the HP Colour LaserJet printer?

(CLJ / CLJ5))

Detail & Solution(s) This is not supported practice and may cause paper jams.

CLJ / CLJ5 - Paper Path Problems

Defect

Printing on ENVELOPES & LABELS? This may cause Paper Jams or Print Quality

problems.

(CLJ / CLJ5))

Detail & Solution(s) This is NOT supported on this printer.

Defect

MISREGISTRATION in both Vertical & Horizontal planes from the Rear Feed

Unit (RFU) only?

(CLJ - July 95 - Richard Bacon UKCE)

Detail & Solution(s) The Register Adjust Address parameters 74 & 75 (page 7-24 in

Service Manual) were set to zero. CE set these to default 74 = 48 & 75 = 43, this

resolved problem.

Information:

CLJ vs CLJ5's which O/P bin do they deposit TRANSPARENCIES (OHT) into?

(CLJ / CLJ5 - Feb 97 - Tony Barrett, Boise Division)

Detail & Solution(s) - Please note the following and educate everybody so they DO

NOT attempt to repair printers if the customer reports this as a fault.

Classic CLJ (C3100A)- All OHT are sent to the top face down bin.

CLJ5 (C3961A)

- All OHT are sent to the front exit.

This is normal difference between the 2 CLJ printers, it is not known why Division

decided to make this change in FW.

Defect

"PAPER OUTPUT's via Front Face-up Bin" even though Upper O/P Bin is selected?

(CLJ - Nov 95 - Vince Bottacchi - UKCE)

Detail & Solution(s) Will not switch to upper O/P bin at all, always directs paper to

Front Face-Up Bin. Diverter solenoid coil (SL5) at the front of the printer had gone

open circuit. It was found that the blue wire to this solenoid had been arcing to the

chassis in the wiring loom at the rear of the Power Supply Drawer. Note it did not blow

fuse on Control Bd (IC5). Replacing Diverter Solenoid SL5 resolved this problem and

ensured wiring loom could not rub against chassis in Power Supply Drawer area.

Defect:

54.4 Error (Engine Error/Service) or/and Paper Jams or/and Print Quality Defects.

(CL5 - March 96 - Technical Update, Boise Division)

Detail & Solution(s) Customers are asked to periodically clean the optics glass (refer

to page 6-5 in ?HP Color LaserJet 5/5MPrinter Users Guide.) Customers also perform

this cleaning upon set-up of the printer (refer to step ?D? in the getting started guide.)

To perform this cleaning it is necessary to use the ?optics cleaning tool? located inside

the. This tool is purple and is seated on the left-hand side Technical of the printer (just

to the left of the fuser assembly.) Customers are asked to replace or re-seat this tool into

its original location when they are done with the optics glass cleaning. Failure to re-

seat this tool properly can cause difficulty in closing the printer top cover. If the top

cover is forced down when the tool is incorrectly seated, the printer may fail to oper-

ate properly. The tool is properly seated when it ?snaps? into place.

CLJ / CLJ5 - Paper Path Problems

5-3

Defect

PAPER JAMS/MISFEEDS from RFU ONLY?

(CLJ - July 95)

Detail & Solution(s) This was caused by contaminated RFU paper pick-up feed

rollers. The resolution was to simply clean these rollers. In the 2 cases we have seen so

far a shiny paper was used and this was thought to be the cause of the contamination.

Please note there was NO problem feeding from paper trays.

Defect:

MISREGISTRATION in both Vertical & Horizontal planes from the Rear Feed Unit

only?

(CLJ - July 95 - Richard Bacon, UKCE)

Detail & Solution(s) - The Register Adjust Address parameters 74 & 75 (page 7-24 in

Service Manual) were set to zero. CE set these to default 74 = 48 & 75 = 43, this

resolved problem.

Defect:

WILL NOT PICK PAPER From the RFU (Rear Feed Unit), always picks from

paper tray.

(CLJ/CLJ5 - Mar 97 - Bob Edwards, UK)

Detail & Solution(s) - Used Basic escape sequences from DOS EDIT to send to printer

via laptop and this successfully picked paper from the RFU. The customer had prob-

lems with their application causing above problem.

Enter the following escape sequences from DOS EDIT and send to CLJ:

<&l4H

This should pick from RFU.

<&l0H

Note: changing line <&l4H to <&l2H the CLJ will pick from tray cassette.

Note: the "<" is the PC equivalent to "escape", to get this to appear in DOS EDIT just

hold Ctrl then P, release both, then press Esc key, this character should appear.

C3119A Rear Feed Unit (RFU) Problems

5-4

CLJ / CLJ5 - PostScript Problems

Defect

HANGS in PostScript Mode when printing PS Start-up page or PS Demo page or cus-

tomer PS files or PS Self-test page. No problems when printing in PCL Mode?.

(CLJ - Feb 96 - Pepi Fermi UKCE)

Detail & Solution(s) It was noted that the Coating Pad consumable counter was at a

ridiculously high count (129). The fuse in the Coating Pad consumable was not blowing

when replaced for the 2nd time. As you know on powering the printer on the fuse should

blow and the consumable counter will increment. In this case the fuse stayed intact and

at each power-on the counter would increment again. The net effect of this is to cause

the PostScript files only to hang when run. Ensure this Coating Pad fuse is blown

See also entry at end of this section "Consumables End-of-Life & PostScript Printing

Defect

"Printer STOPS printing PostScript files"?

(CLJ - Jun 95)

Detail & Solution(s) PCL files print OK. When trying to print PS Self-Test or PS Demo

page or any PS job, the data light flashes, but the printer never prints. Usually, a

consumable was just replaced. The Self-Test page shows one of the consumable counts

is much higher than it should be. It seems the fuse on the consumable is not blowing

when it is replaced as new. Every time the power is cycled the printer will attempt to

blow the fuse, then increment the counter. Why the printer stops printing PS files is not

fully understood at this stage. If you experience this problem contact your local Re-

sponse Centre if in doubt. See also entry at end of this section "Consumables End-of-

Life & PostScript Printing

Defect

"30 PS ERROR 25"?

(CLJ - July 95 - Ray Levy - UKCE)

Detail & Solution(s) CE found that the leading edge of the page was resting against

the paper size switches in the PC Tray at power-up. The " PS ERROR 25" would occur

when PostScript was selected and PS page was printed at power-on.

Defect

"79 SERVICE (xxxx)"?

(CLJ5 - Jul 96 - Boise Technical Update)

Detail & Solution(s) The PostScript SIMM for the CLJ (C3112A) is being installed

into the CLJ5. If this is done an Error 79 will be displayed. Also please note the new

PostScript SIMM (C3963A) for the CLJ5 will not work in the old CLJ. Please when

qualifying call, check the correct PostScript SIMM has been installed in the CLJ or

the CLJ5.

6-1

Defect

"89 SERVICE (4F00 - 0x003B5CAC)" PostScript Error?

(CLJ - Aug95 - Paul Fraser - UKCE )

Detail & Solution(s) This error occurred on FREELANCE, AMI-PRO & CoralDRAW

when print multiple copies of a single page. The copies could set setup in either the

application or via the COPIES in printer front panel and fault would occur. The fault

would start perhaps on the 4th or 5th page with part of printed page missing, then by

6th or 7th page Error 89 would occur. Installing the LJ PostScript Color Driver 3.0.1

resolved this problem.

Defect

"89 Service(0092)"? When printing Postscript files? Faults occurs on the 4th or 5th page

printed.

(CLJ - Jan 96 Pepi Fermi / Bob Edwards)

Detail & Solution(s) Customer using PROJECT 4 application to print these PostScript

files. Problem was found to occur when using JetDirect EX Box to parallel port of

printer. When a MIO JetDirect card was installed no problems. Solution was to supply

customer with a MIO JetDirect card.

Defect

PostScript SIMM will not work in slot 4 of Formatter board?

(CLJ / CLJ5 - April 96 - Boise Technical Updates)

Detail & Solution(s) Move PostScript SIMM to another slot

Defect

"75mm MARGIN on LHS" when printing colour in PostScript mode? PCL files were

OK.

(CLJ - Apr 95 - Keith Scoons - Amen Corner)

Detail & Solution(s) Initiating a COLD-Reset resolved this problem?

Subject: Consumables End-of-Life and Postscript Printing

HP Security level: HP Internal

Defect:

If a consumable reaches end-of-life while the customer is attempting to print a Postscript

print-job, a status message will appear on the front panel. The customer will not be able

to print his/her Postscript print-job.

(CL5/5M - Jan 97 - Technical Update - Harold Orien - Boise Division)

Detail & Solution(s) The status message will continue to display on the front panel and

no printing will be possible in Postscript mode until Developer the appropriate consum-

able is replaced. This situation does not occur when printing in PCL. (An end-of-life

message does appear, but the customer can continue printing. Print quality degrades

until the customer replaces the consumable indicated.)

This situation occurs on both the Color LaserJet 5/5M and the Color LaserJet.

The following consumables produce the above situation when they reach end-of-

life:

CLJ/CLJ5 - PostScript Problem (Con't)

6-2

Color

Black Developer

Drum Cartridge

Transfer Assembly

Fuser

Coating Pad Kit (Color LaserJet Fusers ONLY)

Coating Kit (Color LaserJet 5/5M Fusers)

The situation is not seen when the following consumables reach end-of-life:

Toner (all colors)

Toner Collection Kit (The printer will not print in either PCL or Postscript

mode until replaced.)

Solution:

Customers must replace the consumable indicated by the status message in order to

continue printing in Postscript mode. Where possible customers may wish to switch to

PCL mode to continue printing.

It is recommended that customers keep a supply of consumables on-hand to prevent

downtime.

No technical changes to either the Color LaserJet or the Color LaserJet 5/5M are

planned.

6-3

Index

Page No

54.3 Toner Concentration Error Procedure 2-5

79 Service Error(xxxx) How to Troubleshoot 2-8

A3 Printing in Colour

3-1

Banding:

Faint Horizontal Lines Scan direction

1-5

Bands/Lines in Scan Direction

4-5

Bands/Lines/Streaks in paper

direction.

4-8

Small Pitch Banding, Software cures

1-9

Camera Ready Work:

1-5

Colour Fault troubleshooting Isolation

4-1

Commandments Color LJ's

1-2

Consumables:

Drum Consumable Installation

1-13

End-of-Life & Postscript

1-18

Fusible links

1-4

Front Panel Messages

1-15

Matrix

1-16

Not covered by Warranty

1-17

PostScript - End of Life

6-2

Causing hangs?

6-1

Replacable units matrix

1-16

Contents

1-1

Continue Function Key

1-14

Causing 11.1 Front Tray Load XX

2-1

Drum Consumable Installation

1-13

Duplex Printing, can customers use this mode? 3-1

Error Codes & Messages

A-1

Faults with Error Numbers

2-1

Feature Comparsions

1-3

Formatters:

Replacement Procedure

1-6

Halo's - Print Quality

4-15

Interleaving different types of Media

3-1

I/O Timeouts

3-1

Lines in Scan Direction

4-5

Lines in Paper Movement Direction

4-8

Margin/Image Skew/Registration

4-17

Miscellaneous Problems:

3-1

Mottled Print

4-13

NVRAM Availability?

1-13

Paper Path Problems:

5-1

PostScript Problems:

6-1

Postscript & End-of-Life Consumables

1-18

PostScript - End of Life

6-2

Causing hangs?

6-1

Print Defects Test Files

1-8

Print Quality Problems:

4-1

Colour Fault troubleshooting Isolation

4-1

Faint/faded/Washed-Out Pbms

4-1

Colour Variations Procedures

4-1

Bands/Lines in Scan Direction

4-5

Bands/Lines/Streaks in paper

direction.

4-8

Mottled/Speckled/Ring Marks

4-14

Smeared Print Problems

4-13

Image Skew/Registration/Margin

4-17

Miscellaneous Print Quality Pbms

4-21

Wavey Text & Images

4-20

Rear Feed Unit (RFU)

5-4

Re-Feeding Media in CLJ/CLJ5's

3-1

Registration/Margin/Skew

4-17

Registration Problems, (see section 3 & 5) 3-2 or 5-3

Ring Marks

4-14

Service Note Index

1-4

Skew/Registration/Margin

Skewing, Tips for reducing

4-17

Paper Jams/Misfeeds/Skewing

3-1

Small Pitch Banding (SPB)

Software cures

1-9

Troubleshooting Process

4-6

Smeared Print Problems

4-12

Speckled Print

4-14

Streaks in paper direction.

4-8

Test Files for Print Defects

1-8

Toner Concentration Error 53.4

2-5

Transparencies (OHT)

Light Film, Smears or Streaks

4-13

Wavey patterns (OHT)

4-20

Wavy / Waviness text & Images

4-20

7-1

CLJ / CLJ5

Front Panel

Error Codes

Messages

Appendix - A

A-1

A-2

A-3

A-4

A-5

A-6

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