TOSHIBA AMERICA CONSUMER PRODUCTS, INC.
NATIONAL SERVICE DIVISION
TRAINING DEPARTMENT
1420-B TOSHIBA DRIVE
LEBANON, TENNESSEE 37087
PHONE: (615) 449-2360
FAX: (615) 444-7520
www.toshiba.com/tacp

DVD VIDEO PLAYER

SD-3006

TECHNICAL TRAINING MANUAL

SD-2006

NTDDVD01

TOSHIBA

– 2 –

Contents

1. BIRTH OF DVD .............................. 3

1-1. Background ......................................... 3

1-2. Specifications of the DVD Player ...... 3

1-3. Disc Type ............................................. 3

1-4. Disc Structure ..................................... 4

1-5. Disc Capacity ...................................... 4

1-6. DVD Memory Capacity ..................... 4

1-7. Recording Sequence and Direction ... 5

1-8. Two Bonded Discs ............................... 5

2. FEATURES OF DVD ..................... 6

2-1. DVD is not a Digital Video Disc ......... 6

2-2. Very Large Capacity .......................... 6

2-3. Enabling Technology .......................... 6

2-4. High Picture Quality .......................... 8

2-5. Digital Sound ...................................... 9

2-6. Advanced Functions of DVD ............. 9

3. DVD TECHNICAL POINTS ....... 12

3-1. Compatible Disc ................................ 12

3-2. Title, Chapter, and Track ................. 13

3-3. Video Compression ........................... 14

3-4. Tracking and Focus Errors .............. 15

3-5. Reading a 2-layer Disc ..................... 15

3-6. 1-Track Lens Kick (Return) ............ 16

3-7. Laser PU ........................................... 16

4. BLOCK DIAGRAMS ................... 17

4-1. Main Board. ...................................... 17

4-2. RF Amp and Tracking. ..................... 18

4-3. Servo. ................................................. 19

4-4. Demodulation, Error Correction, and

Decryption. ........................................ 20

4-5. MPEG2 Decoder ............................... 21

4-6. Video Processor ................................ 22

4-7. Video Processing ............................... 23

4-8. Audio Processing .............................. 24

4-9. System Control. ................................ 25

5. CIRCUIT DESCRIPTIONS ......... 26

5-1. Overview ........................................... 26

5-2. Power Supply .................................... 27

5-3. Front Panel Display .......................... 29

– 3 –

1. BIRTH OF DVD

1-1. Background

Everyday, we enjoy entertainment through various media,

such as movies, television, radio, newspapers, and magazines.

A computer, which has been used mainly for business, is

coming closer to becoming a tool in our everyday lives.

We are surrounded by a host of visual images, photographs,

sounds, and characters.

TOSHIBA has sought out the means which enables us to

record as much of this information as possible, in the highest

quality possible. in a form as compact as possible, and is

easy to handle and enjoy.

For this purpose, we have developed many unique

technologies, through discussion with computer profession-

als, as well as the studio staffs in Hollywood, the home of the

film industry in the U.S.A.

As a result, we have developed “DVD”, a digital versatile

disc for the next generation, having the memory capacity of

7 times that of a CD on a single side of the disc.

1-2. Specifications of the DVD Player

Table 1

Disc diameter:

120 mm

Disc thickness:

1.2 mm, 0.6 mm x 2 (stuck)

Semiconductor laser
wave length:

650 nm

Lens (NA):

0.6

Pit length:

0.4 ~ 1. 87 µm (Single-layer)/
0.44 ~2.05 µm (Double-layer)

Track pitch:

0.74 µm

Sector placement:

CLV (Constant Linear Velocity)

Modulation:

8/16 modulation

Error correction:

RS-PC (Read Solomon Product
Code)

Memory capacity:

1) 4.7 GB
(Single-side single-layer)

2) 8.5 GB
(Single-side double-layer)

3) 9.4 GB
(Double-side single-layer)

4) 17 GB
(Double-side double-layer)

1-3. Disc Type

There are four types of discs.

1-3-1. Single-layer, Single-side Disc.

1-3-2. Single-layer, Double-side Disc

1-3-3. Double-layer, Single-side Disc.

1-3-4. Double-layer, Double-side Disc.

0.6mm

Side A

Side B

0.6mm

2nd layer

1st layer

0.6mm

2nd layer

1st layer

2nd layer

1st layer

– 4 –

0.6mm

Side B (standard reflection film)

Bonded layer

Side A (standard reflection film)

0.6mm

2nd layer (standard reflection film)

Bonded layer (transparent)

1st layer (semi-transparent reflection film)

1-4. Disc Structure

The 1st layer (semitransparent reflection film) of the dou-

ble-layer disc does not reflect if a laser beam focus is not

correct.

1-4-1. Single-layer, Double-side Disc

1-4-2. Double-layer Single-side Disc

1-5. Disc Capacity

Table 2

Giga bytes (G Bytes)

Single-layer

single-side

Double-layer

single-side

Single-layer
double-side

Double-layer

double-side

12 cm

4.7

8.5

9.4

8 cm

1.4

2.6

2.9

5.3

1-6. Calculation of DVD Memory Capacity

Conditions:

1. Average video data rate is 3.5 Mbps (bit per second)

or more.

(The compression rate varies depending on video

data.)

2. Sound is Dolby AC-3, 5.1 channel digital surround.

3. Three dubbing languages plus four subtitle lan-

guages.

4. Record 133 minutes on one side of the single-layer

single-side disc.

Data rate required:

Disc capacity required:

Video

Audio

Sub

Total

total

3,500 k + (384 k x 3) + (19 k) = 4,692 kbps

Data rate

Recording time

Memory capacity

4.692 kbps x (133 x 60) sec

8 = 4,680.270 kBytes

(8 bits = 1 Byte)

Recording for 133 minutes in one side of the single-

layer single-side disc requires 4.7 giga bytes.

– 5 –

1-7. Disc Recording Sequence and Direction

There are three recording sequences and directions.

1-7-1. Single-layer disc

1-8. Two Bonded Discs

The DVD disc consists of two 0.6 mm bonded discs, suitable

for reading a data signal recorded in high density. Since the

disc is thinner, the obstacle in the optical pickup and in the

pit on the disc are smaller, enabling accurate reading.

1-7-2. Double-layer disc (A)

1-7-3. Double-layer disc (B)

Disc
center

Lead-in area

Data area

Lead-out area

Disc
center

Lead-in area

Data area

Lead-out area

Lead-in area

Lead-out area

Data area

Middle area

Disc
center

0.6mm
0.6mm

1.2mm

DVD (stuck)

CD (single-plate)

Warp caused by heat or humidity

By bonding discs of the same material back to back, the

flatness of the disc is increased, suppressing warp caused by

heat and humidity by 1.2 mm compared with a single-plate

disc, greatly enhancing reliability.

– 6 –

2. FEATURES OF DVD

2-1. DVD is not a Digital Video Disc

"DVD" has been known as digital video disc, as well digital

versatile disc. Actually, DVD sets the standard for the next

generation of high density optical disc. The abbreviation for

digital video disc does not encompass all the capability of

DVD. DVD is employed as the name for the standard it sets.

The memory capacity of the disc is determined by the in-

formation time and data per second (data rate). In a CD, the

quantized bit number is 16 bits, the sampling frequency is

44.1 kHz and the number of channels is two. Therefore, the

data volume of a CD is 16

44.1 kHz

2 = approximately

1,411 k(bit/sec) = 1.411 M(bit/sec).

The DVD disc has 4.7 GB or 37.6 giga bits (4.7 GB x 8) of

memory capacity in one side. A CD records 74 minutes

maximum. Therefore the DVD disc records 7 hours and 24

minutes (37.6

1000 ÷ 1.411 = 26.648 sec.) with the same

quality sound as a CD.

4.7

688

DVD

x 6.8 pcs.

(single-side)

Approx. 7 times
of CD

133

minutes

DVD

x 2.2 (side)

(single-side)

Approx. 2.2 times
of CD

DVD recording time
(Approximate amount)

DVD data capacity

minutes

2-2. Very Large Capacity

A DVD disc is the same size as a 12 cm CD, but it can record

4.7 Giga Bytes (GB) on one side, which is equivalent to about

7 CDs. It can record one whole movie of 133 minutes with

theater quality picture and sound. This is the capacity of the

single-side single-layer disc. The single-side double-layer

disc has a capacity of 8.5 GB. The single-layer double-side

disc has a capacity of 9.4 GB. The double-layer double-side

disc has the capacity of 17 GB maximum.

2-3. Enabling Technology

2-3-1. Large Recording Capacity

• Track pitch is reduced to half that of a CD to make the

track length long.

• Pits are made fine (half that of a CD) to increase the

volume of data to be recorded.

• The fine pit requires the laser beam spot (focus) to be

small.

• To make the spot small, the laser beam wavelength is

made short and the number of aperture (NA) of the ob-

jective lens is made large.

With the larger NA, the influence of laser beam aberrations

due to the protective film (the transparent plastic part)

increases and the beam spot (focus) blurs with respect to

the disc inclination or the spot displaces widely from the

pit, decreasing the signal read accuracy and increasing the

noise element.

To minimize the influence of laser beam aberrations, the

disc is made thin (0.6 mm or half the thickness of a CD).

To provide compatibility with a CD, the disc is made by

bonding two 0.6 mm discs. The two-disc structure increases

planarity of the disc, resulting in improved signal read

accuracy, as well better resistance to warpage.

– 7 –

2-3-2. Comparing DVD with CD

Table 3

2-3-3. Small Laser Beam Spot (Focus)

The size of the laser beam spot, ø, is smaller because the

laser wavelength is shorter and the NA is larger, as

determined by the equation below.

Where,

NA (Number of aperture) = 0.6 (DVD)

= 0.35 (CD, DVD)

laser beam wavelength = 650 nano-meter

* CD mode of DVD

NA indicates brightness of the lens. It increases as the focal

distance is decreased, and the diameter is increased, as

determined by the following equation:

Item

DVD

DVD (CD) *

Track pitch

1.60 µm

0.74 µm

1.60 µm

Minimum pit

0.87 µm

0.40 µm

0.87 µm

Laser beam wavelength

780 nm (Infrared
ray)

650 nm (Red)

Number of objective aperture

0.45

0.6

0.35

Laser spot

1.8 µm

1.0 µm

1.8 µm

laser wavelength

DVD

= = Approx. 1 micro-meter

650 nm

0.6

CD (DVD)

= = Approx. 1.8 micro-meter

650 nm

0.35

NA=

Disc

0.74

m track pitch

Laser beam spot

0.4

Minimum pit

Laser beam spot

Objective lens

2-3-4. Long Track Length

2-3-5. Thin Disc

The thin disc minimizes blur (disturbance) in the focus and

shift of the beam spot against the disc inclination.

DVD

– 8 –

2-3-6. Long Play Time

The increased capacity, due to the longer track and finer

pit, still won't allow the recording of a complete movie on

one side (one layer) of a 12 cm DVD without compression.

The digital video data must be compressed to realize a full

133 minutes on a one side-single layer disc.

The technique of compressing video data was developed

by the Moving Picture image coding Experts Group (MPEG)

and is the worldwide standard.

MPEG1 (fixed bit rate system) was standardized first and

was applied to video CD, such as used for KARAOKE and

CD-ROM.

MPEG2 (variable bit rate system) was standardized next

and makes DVD possible. Since video images contain

redundant information from one frame to the next, MPEG2

compresses data by predicting motion that occurs from one

frame of video to the next. Motion vectors and background

information are recorded rather than entire video frames.

2-4. High Picture Quality

2-4-1. High Resolution

The picture quality of DVD is 500 lines of horizontal reso-

lution, a great improvement over current media, such as the

Laser Disc at 430 lines.

With the high resolution and high picture quality, the image

contour is clear and sharp and even a dark scene can be

played with perspective and with minimum noise.

2-4-2. Applicable to a Wide Screen

When DVD is applied to a wide screen TV, it can play fine

and beautiful images free from degradation even when in

zoom (magnifying images vertically/horizontally).

Full mode

DVD play on a wide screen TV. High picture
quality of a wide screen TV can be realized.

Video play on a wide screen TV. Picture is
degraded.

Zoom mode

DVD

Horizontal

resolution

500

lines

400 lines/240 lines

430 lines

240 lines

S-VHS video/VHS video

Video CD

Recording
method

Digital (MPEG2)

Analog

Digital (MPEG1)

Comparing the horizontal resolution and recording method of DVD with current media

Applicable to a Wide Screen

– 9 –

2-5. Digital Sound

2-5-1. Recording a Dynamic Range of 144 dB

Utilizing its large capacity, DVD realizes ultra Hi-Fi digital

audio with a dynamic range of 144 dB, based on a high

sampling rate of 96 kHz and 24 bits resolution.

Dynamic ranges of DVD and CD

2-5-2. Sound Effects Like a Movie Theater

Dolby AC 3 digital sound is adopted. AC 3 consists of 5.1

channels; Front left, center, and right, Rear left and right,

and a sub woofer (Low frequency effects). An AC 3 decoder

and 5.1 channel amplifier and speaker system allow for

playback of the full digital sound.

The DVD delivers a super digital sound, exceeding that of a

CD.

Band frequency

20 kHz

40 kHz

DVD range

CD range

Natural sound

Dynamic range

146 dB
(24 bit)

96 dB
(16 bit)

2-6. Advanced Functions of DVD

Many advanced functions can be recorded on a DVD and

are determined by the individual software makers. Each

DVD disc may have different functions. Only the recorded

functions on a particular disc can be played back.

2-6-1. Multilanguage

(1) Selection of voice

A maximum of eight audio streams is available for a

DVD video. These are digital signal paths, not "chan-

nels." Up to eight languages, including the original lan-

guage, can be recorded. It is also possible to record all

of the Dolby AC-3 5.1 channels in the eight streams.

For example, a 5.1 channel in English in the first stream,

French in the 2nd stream, and non-compressed linear

PCM in the 3rd stream.

As the amount of sound data increases, the recording

time decreases accordingly. To increase the recording

time, producers may reduce the number of streams or

select Dolby AC-3 2 channel instead of non-compressed

linear PCM.

(2) Selection of subtitles

Utilizing 32 channels of sub image, up to 32 subtitle

languages can be superimposed. Japanese, English or

French can be independently recorded into each chan-

nel.

– 10 –

2-6-2. Special Modes

(1) Multi-angle function

Using two or more cameras, the images of concerts,

sporting events, dramas, or other events can be recorded

at a maximum of nine angles. With a DVD disc recorded

in this way, a viewer can select a desired angle.

(2) Parental lock function

Utilizing the multistory function, parents can lock out

the violence, sex or other scenes, they don’t want their

children to view. Parents can:

1) Cut these scenes.

2) Replace these scenes by the other scenes, if pre-

pared previously.

3) Disable playing the disc itself.

• The lock function can be set at the lock level.

• Nine lock levels are available and are used based on

the regulations in each country.

• If scenes, which are not wanted to be viewed by chil-

dren, are recorded on a DVD disc, a certain lock level

is set in the disc.

• Once a lock level has been set or selected in the DVD

video player, the system will not play a disc or scenes

from a higher lock level setting.

(3) Multistory function

If two or more branch stories have been recorded for a

main story, it is possible to select a branch story, call the

menu screen at each branch, and select a desired branch

and change the main story.

A. Main and sub story function

This function enables the viewer to play a main story

with another hero or heroine by selecting a sub story.

B. Multi-version function

This function enables the viewer to play two or more

versions, such as a theater version, complete version,

and director’s cut version.

C. Highlight scene scan function

This function enables the viewer to play scenes of fa-

vorite stars or music.

Main story and sub story

– 11 –

D. Branching story function

(simple interactive function)

This function enables the viewer to develop a story

interactively, similar to a so-called roll playing game.

For example, it is possible to change the development

of a story by selecting the actions of characters from

a menu.

Branching story

(4) Playing the multistory

The multistory functions are possible only for discs re-

corded with this feature. Since the contents of a DVD

disc are determined by the disc producer, a variety of

different discs may be marketed. Because a specific ex-

planation of the operation of the multistory features is

not possible, the owner's manual only instructs the user

to "Follow the procedure displayed on the screen or DVD

package."

(5) Multi-aspect function

This function makes a DVD disc compatible with any

type of TV. Since the “squeeze method” is employed to

record wide screen images, compressed to a 4:3 ratio,

the width is simply returned in the full mode when the

disc is played on a wide screen TV. With 4:3 large screen

or direct view TVs , high picture quality is ensured by

selecting the letter box to reduce the height, or the pan

& scan to cut the side portions to fit the 4:3 ratio.

In many cases, current wide screen images are broad-

cast or recorded with the black bars at top and bottom

for the 4:3 screen. Thus, when viewed or played back

on a wide screen TV, the black bars are expelled by

zooming the screen to realize the wide screen image. In

this case, scanning lines are expelled out of the screen

and are reduced from 425 to 360, causing degradation

in picture quality. On DVD, the “squeeze recording

method” solves this problem and allows playback on a

wide screen TV with the normal number of scanning

lines.

• The recording methods and whether the letter box/

pan & scan can be used, depends on the DVD disc

manufacturer. They are not always available on all

DVD discs.

Multi-aspect function

Wide image

Squeeze recording

Disc

DVD player

Converted output

Direct output

Wide screen TV (full mode)

4 : 3 TV

Letter box conversion

Pan & scan conversion

– 12 –

3. DVD TECHNICAL POINTS (MODEL SD-3006, SD-2006)

3-1. Compatible Disc

3-1-1. Types of Discs Playable with the DVD Video Player

The DVD video player is a play only device. It can play

DVD video discs and music CDs as shown below.

Table 4

3-1-2. Recognition (Area Code) of DVD Video Disc

The area code is globally set for Japan, USA/Canada, Asia,

Europe, and other areas and countries. This area code is

recognized in some DVD discs. This is the result of the

strategies of the software makers. Essentially, the DVD discs

of newly released movies and music CDs are not playable

other than in those areas that are authorized.

Therefore, if you play a DVD video disc purchased in a

foreign country using a DVD player sold in the U.S.A., or if

you play a business-use disc, the message, “The area code

is wrong and the disc cannot be played” may appear on the

screen.

3-1-3. Copy Prevention

It is forbidden by law to copy, broadcast, show, broadcast

on cable, play in public, and rent copyrighted material

without permission.

DVD video discs are copy protected, and any recordings

made from these discs will be distorted.

3-1-4. Wide World of DVD

Since video, sound, and data file formats are unified for

DVD, it eliminates the borders between television, audio,

and computer applications.

Note:

• Other discs cannot be played.

• This player conforms to the NTSC TV system, and is

not compatible with discs made for the other TV sys-

tems (PAL, SECAM).

VIDEO

Mark (logo)

Contents

Size

Max play time

DVD video
disk

Sound + video
(moving picture)

12 cm

Single-side disc
About 4 hours

Double-side disc
About 8 hours

8 cm

Single-side disc
About 80 minutes

Double-side disc
About 160 minutes

Music CD

Sound

12 cm

74 minutes

8 cm

(Single CD)

20 minutes

Computer application

Civil apparatus (TV environment)

DVD

Audio CD

DVD Video

CD-ROM

DVD-ROM
DVD-
Rewritable

– 13 –

3-2. Title, Chapter, and Track

A DVD video disc is generally divided by “title” and is fur-

ther divided into “chapters”. On the other hand, a music

CD is divided into “tracks”.

Example: DVD video disc

Example: Music CD

The titles, chapters, and tracks are numbered. These numbers

are not recorded on some discs.

Title:

DVD video disc contents are divided into several parts. This

is equivalent to a “story” or a collection of short stories.

Chapter:

The title contents are further divided into scenes or tunes.

This is equivalent to a “chapter” of a book.

Track:

Music CDs are divided into songs.

Chapter 1

Title 1

Title 2

DVD video disc

Truck 1

Truck 3

Truck 4

Truck 5

Truck 2

Music CD

– 14 –

3-3. Video Compression

Though the recording capacity of a DVD disc is 7 times

greater than a CD, only about 4 minutes of an NTSC TV

image can be recorded as a full digital file.

Investigations into data compression techniques began in

the 1960’s, yielding such standards as JPEG, MPEG1, and

MPEG2.

MPEG1 was adopted for video CD (music CDs used to ac-

company live singing). MPEG1 compresses data to 1/100,

enabling it to record a maximum of 74 minutes of video,

but, the picture quality is inferior to that of a Laser Disc.

MPEG2 compresses data to about 1/40, and, along with other

techniques achieves a picture quality higher than LD.

* MPEG is the Moving Picture Experts Group, the com-

pression technique working group, part of the ISO/IEC joint

technical committee. ISO is the International Standardization

Organization and IEC is the International Electric Standard

Conference.

Comparing the video of MPEG2 with MREG1

3-3-1. Concept of MPEG2

The MPEG2 compression technique consists of about 20

items, including a variable data transfer rate from 10 Mbps

for a complex or quick moving picture to 1 Mbps for a simple

or nearly still picture. The average data transfer rate is 3.5

Mbps.

Video compression system

(apparatus adopting this system)

MPEG2

(DVD)

MPEG1

(Video CD)

Main video resolution

720 x 480 pixel

352 x 240 pixel

Frame rate

1/60 sec

1/30 sec

60 images per second

30 images per second

Data transmission rate

1 ~ 10 Mbit/sec (variable)

1.15 Mbit/sec (fixed)

Average compression rate

Approx. 1/40

Approx. 1/100

Picture quality

Higher than LD

Equivalent to VH

Generally, the system is based on the principal that moving

images contain redundant information from one frame of

video to the next; the background stays the same for many

frames at a time. Compression is accomplished by predicting

motion that occurs from one frame to the next. Motion

vectors and background information is recorded, rather than

entire video frames.

MPEG2 decoding reconstructs the video frames.

– 15 –

3-4. Detection of Tracking and Focus Errors

3-4-1. Detecting a Tracking Error in CD Mode

(3-Beam Mode)

The auxiliary beams (E and F) are made by the diffraction

grating of the laser PU and are displaced from the main

beam as shown below. The auxiliary beams are displaced

ahead of and behind the main beam to prevent crosstalk

between tracks or signal interference between auxiliary

beams. Condition 2 below is the correct condition; the

main beam is located at the middle of the track and the

auxiliary beams A and B ride a little over the track by the

same amount on either side, so the outputs of E and F

become equivalant and the output of the error circuit

becomes zero. If the auxiliary beams are offset to either

side, as shown in 1 or 3, the outputs of E and F are no

longer equal and the error signal becomes positive for

condition 1 and negative for condition 3.

A (E)

B (F)

1 = +
2 = 0
3 = Ð

3-4-2. Detecting a Tracking Error in DVD Mode

(Verified DPD)

<Verified Differential Phase Detect>

The phase difference system improves stability against

damaged discs. The phases of the one-beam PD (Photo

Detector) outputs A + C and B + D are compared in the DP

(Phase Detector), and a tracking error signal is generated.

When the beam is correctly located, as shown in drawing 2

below, the phases of A + C and B + D are the same, and the

tracking error output is zero. However, if the beam is offset,

as shown in drawing1 or 3, a phase difference occurs and a +

or - DC voltage is produced as an error signal.

B+D

A+C

B + D

A + C

Pit

Beam

Array of PD

Tracking

error output

Phase Delayed

Same

Advanced

3-4-3. Detecting a Focus Error (Astigmatic Method)

An error signal is detected by changes in the beam shape.

This beam is formed by the sensor lens of the laser PU, and

as the distance between the objective lens and the disc surface

varies, the beam shape changes. The shape of the beam from

the sensor lens, applied to the PD, is circular if the beam

focus is adjusted to the surface of the disc. If it is out of

focus, it spreads in the direction of A + C or B + D of the PD,

like an ellipse, as shown below. The corresponding ±DC

voltage is the focus error signal.

A + C

B + D

Sensor lens

Beam spreading
in the directions
of A and C

Beam spreading
in the directions
of B and D

Focus
error signal

Distance from
the lens to the
disc

Near

Optimum

Far

3-5. Reading a 2-layer Disc

Some DVD video discs have two layers of reflective film

on one side. The upper layer is a standard reflective film

(2nd layer), and the lower layer is a semi-transparent

reflective film (1st layer).

With a single-layer reflective film, signals are read in the

same manner as with audio CDs. With double-layer discs, a

laser beam must pass through the lower reflective film to

read the the upper reflective film.

The lower film is made semi-transparent (reflection rate of

30%) and the beam focus is adjusted to the upper film.

0.6mm

2nd layer (standard reflection film)

Bonded layer (transparent)

1st layer (semi-transparent reflection film)

– 16 –

3-6. 1-Track Lens Kick (Return)

Data pickup for an audio CD is performed at a constant rate

along the track of a disc, because the data is recorded at a

fixed bit rate in the track. In DVD, data is recorded at a

variable bit rate and the amount of data is not constant in

each track. Thus, the readout information (by frames) from

the laser PU is stored in memory prior to playing on the screen

at the correct frame rate. Since the memory capacity is

limited, it soon overflows. When the amount of data in the

memory reaches a certain level, the objective lens is returned

by one track, and held in the pause mode until the memory

volume decreases. This keeps the memory controlled at about

90% of capacity.

Same time

Time

Memory access

Called from the memory and played on the
TV screen (the access time is constant).

Read from a disk
and memorized.

Memory information
is given priority.

Held in pause
mode until

3-7. Laser PU

3-8-1. Two Lenses

“DVD can play an audio CD” is one of the conditions of the

DVD format. The methods of reading DVD and CD signals

is the same, but the pit size and disc thicknesses are different.

The same lens can not read both.

To solve this problem, the DVD/CD 2 lens switching system

or the two-focus system (which uses a holographic lens at

the center of the main lens, so that the CD signal is read at

the middle of the lens and the DVD signal is read with the

whole lens) is used. The SD-3006 uses the two-lens system.

The large lens is selected when playing a DVD disc, and the

small lens is selected to play a CD.

Lens case

Lens support
axis

Rotation
direction

Lens for DVD

Lens for CD

3-7-2. Laser PU Structure

The construction of the PU is shown below.

The working lens is detected by
receiving the laser beam reflected
from the mirror provided under the
objective of CD using a
photosensor.

Disc

Objective

Mirror

Photosensor

Collimator lens (used to parallel the beam)

Deflection beam splitter

Diffraction
grating

Laser
diode

Reflector

/4 plate

Sensor lens

Photodetector

3-7-3. Cleaning the laser PU objective

The objective lens becomes dirty over time and should be

cleaned periodically. As the lens surface gets dirtier, the

intensity of the laser beam decreases, causing playback

failures.

• If the RF level is not restored to the correct level after

cleaning the objective lens, the collimator lens probably

needs cleaning.

(1) Cleaning the Objective Lens

1 Moisten a cotton swab with pure alcohol (not rubbing

alcohol) and wipe the lens outward 3 to 4 times, just

like drawing a circle.

2 Repeat at least two more times, using a clean cotton

swab each time.

(2) Laser PU Performance

If proper performance is not regained after cleaning the

objective lens and internal optics, the laser diode may

be near the end of its useful life.

The lifetime of the laser diode depends on environ-

mental conditions, such as temperature and humidity,

but is usually about 5,000 to 10,000 hours.

– 17 –

4-1. Main Board.

4. BLOCK DIAGRAMS

Refer to Diagram 4-1. Main Board.

The main board of the DVD player can be segmented into

eight distinct functional blocks:

1. RF Amp and Tracking.

2. Servo.

3. Demodulation, Error Correction, and Decryption.

4. MPEG 2 Decoder

5. Video Processor

6. Video Processing

7. Audio Processing

8. System Control.

VIDEO

OUT

AUDIO

OUT

Diagram 4-1. Main Board

Except for the System Control block, video and audio data

flow in a linear progression through each of the blocks, until

the data is converted to the desired format, and exits the player.

– 18 –

4-2. RF Amp and Tracking.

Refer to Diagram 4-2. RF Amp and Tracking.

IC502 develops the laser drive signal and sends it to the laser

pickup via pin 7 of CN501. Once the disc starts spinning,

the laser pickup sends two differential RF signals to the

equalization circuits in IC502 via pins 16 and 17 of CN501.

If a DVD disc is playing, the RF eye pattern signal is output

on pin 34 and can be monitored at test point 502.

If a CD audio disc is playing, a lower frequency eye pattern

signal is output on pin 39 and can be monitored at test point

501.

The laser pickup develops tracking error and focus error

signals and sends them to IC501 and IC502, via pins 10

through 15 of CN501. There are two types of tracking error

signals developed. The DVD player functions as a single

beam system for DVD discs, and a three beam system for

CD audio discs. Error signals A, B, C, and D are applied to

the offset comparator in IC501 to develop the DVD tracking

error signal. The DVD tracking error signal is phase detected,

output on pin 14, and applied to a switch in IC502, via pin 8.

Error signals E and F are generated by a CD audio disc and

applied to the CD tracking error comparator in IC502. The

resulting CD tracking error signal is also applied to the switch.

The switch selects the proper tracking error signal, TE, and

outputs it on pin 21. TE can be monitored at test point 507.

Signals A, B, C, and D are applied to the focus detector circuit

in IC502 to develop the focus error signal, FE. FE is output

on pin 27, and can be monitored at test point 505.

IC501 DVD-TE

DVD EQ

CD TE COMP

FOCUS DET

CD EQ

OFFSET

COMP

PHASE

DET

IC502 RF AMP

LASER

DRIVE

DVD TE

DVD RF

CD RF

LASER

PICKUP

FOCUS

TRACKING

COIL

LASER

PICKUP

CN501

PINS

16 & 17

PINS

10 - 15

A, B,

C, & D

A, B,

C, & D

E & F

TP507

TP505

TP502

TP501

Diagram 4-2. RF Amp and Tracking.

GO TO MAIN BLOCK

– 19 –

4-3. Servo.

Refer to Diagram 4-3. Servo.

The servo block is responsible for driving and controlling

the disc motor, the feed motor, and the focus and tracking

coils. When a disc is inserted in the player, several events

occur before the RF signals or tracking signals are developed.

First, the feed motor pulls the laser slide assembly toward

the disc motor and stops when the disc is in the correct

position. Then, the focus coil pushes the objective lens up

and down in an attempt to achieve focus. During this startup

process, the focus and tracking error signals are developed

and applied to the servo control circuit in IC503, via pins 43

and 46. The servo control circuit processes the focus and

tracking error signals, and develops the focus and tracking

drive signals, output on pins 48 and 49. The focus and

tracking coils must be rotated 90 degrees to change the

objective lens for an audio CD. The focus and tracking drive

signals are switched for the proper orientation in IC506. The

drive signals are amplified in IC505 and applied to the focus

and tracking coils, via pins 1, 2, 3, and 4 of CN501.

Feed motor drive information from the system control, IC601,

is sent to the servo control in IC503 via an I/O bus. The

servo control develops the feed motor drive signal and outputs

it on pin 53. This signal is amplified in IC505 and sent to the

feed motor, via pins 1 and 2 of CN502. Two hall switches

monitor the rotation of the feed motor and send signals to

IC509, via pins 5 through 8 of CN502. This information is

processed in IC509, and sent back to the system control IC,

which monitors the speed and position of the feed motor.

IC503 also processes the CD RF signal on pin 38. The signal

is demodulated, error corrected, and sent to IC904, via pin 9.

This signal is also monitored by the servo control to develop

the CD CLV error signal, output on pin 55.

The CD CLV signal is applied to the disc motor drive, IC510,

pin 21. The disc motor drive keeps the disc motor running at

the proper speed. IC510 sends three drive signals to the disc

motor via pins 17, 18, and 19 of CN502 . A series of hall

switches in the disc motor sends feedback signals to IC510,

via pina 9 through 16 of CN502.

DISC

MOTOR

IC510

DISC

MOTOR

DRIVE

LASER

F/T

COIL

IC506

SWITCH

IC503

SERVO

IC505

DRIVE

IC509

SPEED

DET

FEED

MOTOR

SERVO

CONTROL

DEMOD

PLL

CORR

FE TE CD RF

DATA

IC904

FROM IC502

PUTAC

TO IC601

CD CLV

DVD CLV

FROM IC201

PINS

5 - 8

CN501

CN502

2 & 3

1 & 4

1 & 2

17 - 19

9 - 16

DRIVE

FEED

BACK

FOCUS

TRACKING

FROM

IC601

90 - 93

Diagram 4-3. Servo.

GO TO MAIN BLOCK

– 20 –

4-4. Demodulation, Error Correction, and

Decryption.

Refer to Diagram 4-4. Demodulation, Error Correction, and

Decryption.

The DVD RF signal from IC503 is applied to the data slicer

in Data Processor 1, IC207, via pin 50. The data is processed

and applied to the phase locked loop (PLL), so the incoming

data can be locked to the timing of the processor. Since the

bit rate of the DVD data can vary, the data is stored in the 4

meg DRAM, IC202, then sent to the 8/16 demodulator as

needed.

Once the signal is demodulated, it is error corrected and sent

to Data Processor 2, IC207. Data Processor 2 detects the

region code in the DVD signal, and if it matches the region

code of the player, the signal is processed, and the MPEG2

Data is sent to IC304, the MPEG2 Decoder. However, if the

region code is incompatible, the disc will not play, and the

region code error message is displayed on the screen instead.

The DVD signal from the PLL circuit is also applied to the

CLV drive circuit, to produce the DVD CLV error signal.

This error signal is sent to pin 21 of IC510 to keep the disc

motor running at the proper speed.

IC202

4 MEG

DRAM

DATA SLICER

8/16

DEMOD

PLL

ERROR

CORRECTION

CLV

IC207 DATA

PROCESSOR 2

DECRYPTION

IC207 DATA

PROCESSOR 1

DEMOD & ERROR

CORRECTION

DVD CLV
TO IC510

DVD RF

FROM

IC502

MPEG2 DATA

TO IC304

Diagram 4-4. Demodulation, Error Correction, and

Decryption.

GO TO MAIN BLOCK

– 21 –

4-5. MPEG2 Decoder

Diagram 4-5. MPEG2 Decoder.

Refer to Diagram 4-5. MPEG2 Decoder.

The parallel DVD data from IC207 is applied to the Program

Stream Decoder in the MPEG2 decoder, IC304, where it is

decoded into audio and video data. During the decoding

process, the data is stored in the 16 meg DRAM, IC202, via

the memory interface. The decoded audio and video data

are sent to IC301 via the video interface.

IC202

16 MEG

DRAM

PROGRAM

STREAM

DECODER

IC304

MPEG2

DECODER

MEMORY

INTERFACE

VIDEO

INTERFACE

MPEG2 DATA

FROM IC207

VIDEO & AUDIO

DATA

TO IC301

GO TO MAIN BLOCK

– 22 –

4-6. Video Processor

Diagram 4-6. Video Processor.

Refer to Diagram 4-6. Video Processor.

The Video Processor, IC301, processes both the audio and

the video data from IC304. Audio is processed by the system

decoder and sent to IC902. Video is processed by the mixer

and sent to IC307. In the model SD3006, the color difference

signals, Cb and Cr, are produced by the mixer and output on

pins 115 and 117. All On Screen Display (OSD) information

is produced by IC303 and applied to the mixer. Sub titles,

extracted from the DVD data, are processed by the Sub Title

Processor, in conjunction with the 1 meg DRAM, IC302.

The sub title data is sent to the mixer to be combined with

the video signal.

IC303

OSD

SYSTEM

DECODER

IC301

VIDEO

PROCESSOR

MIXER

SUB TITLE

PROCESSOR

VIDEO & AUDIO

DATA

FROM IC304

IC302

1 MEG

DRAM

AUDIO DATA

TO IC902

VIDEO DATA

TO IC307

Cr (R-Y)

Cb (B-Y)

115

117

GO TO MAIN BLOCK

– 23 –

4-7. Video Processing

Diagram 4-7. Video Processing.

Refer to Diagram 4-7. Video Processing.

Video data from IC301 is applied to the Macrovision

Copyguard, IC307. The data is then applied to the video

Digital to Analog Converter (DAC), IC306. Analog

luminance (Y) is output on pin 46, chrominance (C) is output

on pin 43, and composite video (CV) is output on pin 40. In

model SD2006, the switches (SW) are fixed to output only

the Y, C, and CV. However, in model SD3006, the switches

are controlled by the Video Select Switch, on the back of the

player. In one position, the outputs are the same as for the

SD2006. When the Video Select Switch is in the other

position, the player outputs Cb, Cr, and Y.

IC307 MACROVISION

COPYGUARD

IC306

VIDEO

DAC

AMP

LPF

SD3006

ONLY

FROM VIDEO SELECT SWITCH

SD3006 ONLY

VIDEO DATA

FROM IC301

GO TO MAIN BLOCK

– 24 –

4-8. Audio Processing

Diagram 4-8. Audio Processing.

Refer to Diagram 4-8. Audio Processing.

Parallel audio data from IC301 is applied to the buffer in the

parallel to serial converter, IC902. The 4 meg DRAM, IC903,

stores the data as it is converted into serial data. The serial

audio data is then output on pin 44 to the AC3 decoder, IC901.

The audio data is then applied to the data I/O in the audio

system processor, IC904. The Data I/O selects either DVD

audio, or CD audio, depending on the type of disc being

played.

If the audio selector switch on the back of the player is in the

ANALOG/PCM position, analog audio data are output on

pin 11, and PCM audio data are encoded and output on pin

17. Analog audio data is converted to right and left analog

signals by the audio DAC, IC905, and output on pins 17 and

18. However, if the audio selector switch is in the AC3/

ANALOG OFF position, no analog data is output on pin 11,

but AC3 audio data is encoded and output on pin 17.

IC902 P/S

CONV

BUFFER

P/S

IC903

4 MEG

DRAM

IC901

AC3

DECODER

DATA I/O

DIGITAL

ENCODER

IC904

AUDIO

SYSTEM

PRO

IC905

AUDIO

DAC

LPF

AMP

LPF

AMP

DIGITAL

AC3/PCM

ANALOG

RIGHT

ANALOG

LEFT

AUDIO DATA

FROM IC301

CD DATA

FROM IC503

GO TO MAIN BLOCK

– 25 –

4-9. System Control.

Diagram 4-9. System Control.

Refer to Diagram 4-9. System Control.

All functions of the DVD player are controlled by the System

Control. This consists of the main microcomputer, IC601;

the SRAM, IC604; the DRAM, IC611; and the EEPROM,

IC605.

When the player is plugged in, the main microcomputer is

reset by the DSPRST signal on pin 67. The microcomputer

stays powered by the EVER +5Vdc on pin 25. Its timing is

derived from the 16 Mhz crystal, X601, on pins 27 and 28.

Communications on the main board are accomplished with

parallel data and address busses, as well as serial clock and

data lines.

Communications for the front panel are separate from the

internal main board communications.

DATA BUS

IC601 MAIN

MICROCOMPUTER

IC604

SRAM

IC611

DRAM

IC605

EEP ROM

ADDRESS BUS

FRONT PANEL

COMM

SERIAL DATA

SERIAL CLOCK

RESET

DSPRST

EVER

+5Vdc

X601

16Mhz

GO TO MAIN BLOCK

– 26 –

5. CIRCUIT DESCRIPTIONS

5-1. Overview

Refer to diagram 5-1. Overview.

Toshiba DVD players consist of four main functional blocks;

the power supply, the laser mechanical assembly, the main

board, and the front panel display. The laser mechanical

assembly is a collection of individual parts and PC boards.

The other functional blocks are housed on individual PC

boards. A color difference board is added to the SD3006

player to output the component video signal.

As long as the DVD player is plugged in, the power supply

is active, but only in standby mode. Only the DC supplies

necessary to activate the microprocessors and the front display

panel are activate. When the power button is pushed, either

on the front panel, or the remote, a power on signal is sent to

the power supply to activate the remaining DC supplies.

On power up, the main board drives the laser mechanical

assembly to check if there is a disc in the tray. If there is a

disc in the tray, the main board monitors the servo feedback

signals and the RF signal to determine if the disc is a DVD or

a CD. The disc's table of contents is read and the player

either goes into the stop mode, or, with some DVD discs,

into the play mode. While a disc is playing, the main board

constantly monitors the servo feedback signals and adjusts

the drive signals for changing conditions.

The main board processes the DVD RF signal and extracts

the MPEG2 video and whatever type of audio was recorded

on the disc. MPEG2 digital video is converted to analog

video and output as S-Video or composite video. In the

SD3006 player, the MPEG2 video can be converted to

component video R-Y, B-Y, and Y, and output through the

color difference board as Cr, Cb, and Y. The audio recorded

on the disc is processed on the main board, then output as

analog left and right audio, digital PCM audio, or digital AC-

3 audio.

SERVO FB

DRIVE SIG

DVD/CD RF SIG

LASER

MECHANICAL

ASSEMBLY

MAIN

BOARD

COLOR DIF

BOARD SD3006

POWER

SUPPLY

FRONT PANEL

DISPLAY

DC SUPPLY VOLTAGES

POWER ON/OFF

SUPPLY

VOLTAGES

CONTROL

SIGNALS & DATA

R-Y

B-Y

S-VIDEO

COMPOSITE
VIDEO

AC-3/PCM
AUDIO

L AUDIO

R AUDIO

Diagram 5-1. Overview.

– 27 –

5-2. Power Supply

Refer to Diagram 5-2. Power Supply.

The power supply in the Toshiba DVD player is a self

oscillating, free running, switched mode supply with optical

feedback for regulation. Except for the Control IC, Q821,

it’s operation is typical of most free running switched mode

power supplies. To prevent damage to the player or test

equipment, always use an isolation transformer when

servicing the player.

One hundred and twenty volts AC is applied to the bridge,

where it is rectified and then filtered to approximately 160

Vdc by filter capacitor, C805. The 160Vdc is applied to pin

3 (the collector) of switch, Q803, through the primary

winding, P1 of transformer T802. At the same time, a small

start up voltage derived from the 160Vdc is applied to pin 2

(the base) of Q803 through resistors R804 and R805. This

positive voltage on the base of the transistor turns it on,

allowing current flow through the primary winding P1 of

T802. A magnetic field starts building around all of the

windings in T802; however, no secondary voltages are

developed at this time due to the polarity of the secondary

windings and the rectifier diodes. The building magnetic

field developed by P1 induces current flow in P2 that is

positive at pin 2 of T802. Also, since there is current flowing

in P2, P2 develops it’s own small magnetic field with the

same polarity as the field developed by P1. The positive

voltage developed by P2 is applied to the base the Q803 to

saturate it. Eventually, collector current reaches maximum

and the magnetic field around P1 stabilizes. Current no longer

flows in P2, so the positive voltage applied to the base of the

transistor disappears. The small magnetic field around P2

collapses, making pin 2 of T802 negative with respect to pin

1, and the transistor turns off. Current flowing through P1

ceases and the magnetic field collapses. As this field collapses

it induces current flow in P2 that is negative at pin 2 with

respect to pin 1, and P2 builds its own small magnetic field.

Once P1's field has completely collapsed, the small magnetic

field around P2 collapses, making pin 2 positive with respect

to pin 1. This positive voltage is applied to the base of the

transistor, turning it on. Now that the oscillator has started,

it can continue oscillating even if the start up voltage is

removed.

Power is transferred to the secondary windings when the

magnetic field around P1 collapses, and after a few cycles,

the supplies are up to their full voltage. Until the power is

turned on, the only supplies that are active at connector

CN801 are the Ever +5Vdc, the -24Vdc, the F+ (-16Vdc),

and the F- (-21Vdc). The Ever +5Vdc is used to power the

microcomputers, while the -24Vdc, F+, and F- are used for

the fluorescent display.

The control IC, Q821, monitors the +9.3Vdc supply

developed at pin 7 of T802 and sends an error signal from

error amp 1 to the optical feedback IC, Q802. This error

signal is optically coupled to the base of the switch transistor

to regulate the frequency of the oscillator. Since the frequency

of the oscillator determines the amount of power coupled to

the secondaries, the supply can regulate itself. Without the

feedback, the supply cannot regulate itself, usually causing

failure of the switch in the primary, as well as various other

components. Often, these types of supplies have cascade

failures that can only be isolated while the supply is operating.

Always bring the line voltage up slowly with a variac, to

prevent damaging any repairs already made.

During normal operation, the supply operates at a frequency

of approximately 130Khz with power off and 55Khz with

power on. However, these frequencies will vary, depending

on the line voltage. This supply maintains regulation down

to a line voltage of about 25 VAC with power off, and about

50 VAC with power on.

When the player is turned on, the microcomputer on the main

board applies +5Vdc to the power supply via pin 3 of CN801.

The +5Vdc is inverted to a low by Q827 and is applied to the

on/off block in Q821, the regulator Q824, and the switch

Q825. Inside the control IC, the on/off block turns on

regulator 2, applying the analog +5Vdc supply to pin 4 of

CN801. The on/off block also turns on error amp 2, allowing

regulator Q822 to supply 3.3Vdc to pin 8 of CN801.

Regulator Q824 is allowed to supply the +9Vdc via pin 5 of

CN801, and the +8Vdc at pin 6 through D835. Switch Q825

allows the control IC to control regulator Q823, in turn

supplying the digital +5Vdc at pin 7 of CN801.

– 28 –

There are three simple protection circuits that can shutdown

the power supply.

T he first of these consists of diodes D831, D832, and D833.

If either the +9Vdc, +8Vdc, or digital +5Vdc supplies is

shorted to ground, a low is applied to the base of Q827,

turning the supply off just like an off signal from the

microcomputer.

The second protection circuit is an over voltage shutdown

that monitors the +9.3Vdc supply derived from pin 7 of T802.

If this supply exceeds 11 volts, D828 conducts and turns on

Q828, which in turn shuts the supply down by applying a

low to the base of Q827.

The third shutdown circuit monitors the temperature of the

control IC, Q821. If the temperature of the control IC rises

above the operating threshold of the circuit (approximately

130 degrees, celsius) all of the positive supplies are turned

off.

This supply runs unloaded at full line voltage, so it’s easy to

check for loading on any of the sources. Also, a jumper can

be inserted between pins 2 and 3 of CN801 to activate all of

the sources during troubleshooting.

FILTER

C805

T802

TRANSFORMER

Q802

OPTICAL

FEEDBACK

START

R804
R805

Q803

SWITCH

21V

REG2

ERR

AMP 1

REG1

REG3

ERR

AMP 2

REG

Q824

REG

Q823

REG

Q822

OFF

TEMP
SHUT

DOWN

Q825

Q827

Q828

D828

(11V)

D821
C821
C822

D822
C823
C824

D823
C825

D824
C826
C835

D825
C828
C836

EVER
+5Vdc

ANALOG
+5Vdc

POWER
ON/OFF

+9Vdc

DIGITAL
+5Vdc

+3.3Vdc

-24Vdc

D835

+8Vdc

F+
-16Vdc

F-
-21Vdc

Q821

CONTROL IC

13 12

CN801

130 C

+/- 20 C

D832

D833

D831

+9.3Vdc

+5.8Vdc

+4.3Vdc

-36Vdc

Diagram 5-2. Power Supply.

– 29 –

Refer to Diagram 5-3. Front Panel Display.

There are two main functions of the front panel in a Toshiba

DVD player. The first of these functions is to display the

status of the player, and the second is to interpret and

communicate user commands from either the front panel

buttons or the remote control to the main board. Three

components, the Fluorescent Display, the Remote Sensor,

and the Display Microcomputer comprise the majority of

the front panel. A flex cable connects the front panel to the

main board via CN101, and supplies all power and

communications.

Power for the fluorescent display is the -21Vdc (F-) input on

pin 1, and the -16Vdc (F+) input on pin 2. The display

microcomputer requires two supplies, the Ever +5Vdc via

pin 9, and the -24Vdc (Vkk) via pin 3.

Communication signals are the FSTBX on pin 4, the DSPCK

on pin 5, the DSPSO on pin 6, and the DSPSI on pin 7. The

DSPRST signal on pin 10 is a +5Vdc reset high signal, which

resets the display microcomputer when power is applied to

the player. The FSTBX signal is an enable signal which

allows communications between the two boards during low

transitions. Use the FSTBX signal as a trigger and reference

all other signals to it when viewing the communication signals

with a scope.

The DSPCK signal is the serial clock, which consist of eleven

low clock pulses during one low period of the FSTBX signal.

Serial data from the main board to the front panel is

transferred on the DSPSO signal, and serial data from the

front panel to the main board is transferred on the DSPSI

signal. All of these signal are applied to the serial transfer

block in the display microcomputer.

User commands are sent to the serial transfer block in the

display microcomputer either by the remote control sensor,

via pin 22, or by the buttons on the front panel via pins 9 and

10. The key process block in the microcomputer monitors

the voltage levels on the KEYIN 1 and KEYIN 2 inputs to

determine when a button is pressed. For example, when the

power button is pressed the voltage on the KEYIN 1 input

drops from 5Vdc to +2.5Vdc, signaling the microcomputer

to turn on the player. Similar voltage level changes occur

on each line for all of the buttons on the front panel.

Refer to the diagram 5-4. Grid and Cathode chart.

The fluorescent display is driven by the combination of the

signals on the grids, G1 through G7, and the anodes, P1

through P16. An element is illuminated when both the anode

signal and the grid signal are high. This chart is also on page

3-14 of the service manual.

Timing for the microcomputer is supplied by the 8Mhz

crystal, X101.

5-3. Front Panel Display

– 30 –

A-

CHP/TRK

TITLE

RANDOM

TITLE

MEMORY

REMAIN

TOTAL

CHP/TRK

TITLE

CHP/TRK

CD TOTAL REMAIN

A-B

MEMORY
RANDOM

CHP/TRK

TITLE

DVD

col

DVD

GRID

ANODE

P10

P11

P12

P13

P14

P15

P16

-
-

TITLE

CHP/TRK

CD TOTAL REMAIN

A-B

MEMORY
RANDOM

CHP/TRK

TITLE

F- (Pins 1&2)

-21Vdc (F-)

-16Vdc (F+)

CN101

S1 - S16

(Pins 1-8, 35-38, 41-44 )

FLUORESCENT

DISPLAY DRIVER

DISPLAY

MEMORY

SERIAL

TRANSFER

KEY

PROCESS

ICX01

DISPLAY

MICROCOMPUTER

CN101

+5Vdc

DSPCK

DSPSI

DSPSO

DSPRST

MT101

REMOTE

SENSOR

FSTBX

Power (+2.5Vdc)

Open/Close (0Vdc)

Play (0Vdc)

Skip FW (+1.25Vdc)

Skip REV (+2.5Vdc)

Pause (+3.8Vdc)

F+ (Pins 41&42)

G1 - G7 (Pins 5 - 11)

S1 - S16 (Pins 21 - 38)

G1 - G7 (Pins 28 - 34)

KEYIN 1

KEYIN 2

(KEYIN 3 & 4)

X101 8Mhz

Ever +5Vdc

Vkk -24Vdc

CN101

DVD

Diagram 5-3. Front Panel Display.

Diagram 5-4. Grid and Cathode Chart.

Document Outline

Cover
Contents

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