Trouble Shooting Guide, Electrical





Trouble Shooting Guide T200, Electrical

by Toko ([e-mail])





Contents



1

Explanations ....................................................................................................................2

1.1 Service functions in the software................................................................................2

2

Network Problems ..........................................................................................................3

3

On/Off Problem...............................................................................................................4

4

Display / Illumination Problems ....................................................................................5

5

Charging Problems .........................................................................................................6

6

LED Problems .................................................................................................................7

7

Alert Problems ................................................................................................................8

8

Microphone Problem ......................................................................................................9

9

Real time clock problem...............................................................................................10

10

SIM Card recognition Problem ...................................................................................10

11

Revision history.............................................................................................................12



4/00021-2/FEA 209 544/71 B

Approved according to 000 21-LXE 107 42/1

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Trouble Shooting Guide, Electrical





1 Explanations



For Component replacement refer to doc. Component List.

The Go / No Go test has to be performed with a mounted phone.



1.1 Service functions in the software



In the software of the phone there is a built in service function that allows testing some of the functions of the phone.





They are as follows:

â€Ã³ Service info

â€Ã³ Service settings

â€Ã³ Service tests

â€Ã³ Text labels



To use the function press the following combination, using the naviation button and the keyboard: > * < < * < *





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Trouble Shooting Guide, Electrical



2 Network

Problems



â€Ã³ Check the Antenna Units flex film is properly fitted and undamaged.





(Fig2.1) Also check the connectors on the antenna unit.

Replace the Antenna unit if it’s necessary.

Also check the PCB pads, if necessary clean them.



â€Ã³ Check the External Antenna Connector (Fig2.2) if it’s incorrectly soldered, mechanically damaged, dirty, deformed or oxidized. Measure the resistance through the Antenna Connector; it should be less than 1â"Åš.

Replace Antenna Connector if it’s necessary.





If fault still remains, send the unit to higher level according to local company directives.





Fig. 2.1

Fi

F g

i .

g 2.2





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Trouble Shooting Guide, Electrical



3 On/Off

Problem



â€Ã³ Check that the telephone battery connector if it is incorrectly soldered, mechanically damaged, dirty, deformed or oxidized (Fig. 3.1 ).

Replace battery Connector if necessary.

â€Ã³ Make sure that the battery is working properly.





Replace battery if necessary.

â€Ã³ Make sure that the keypad is not damaged.





Replace keypad if necessary.

â€Ã³ Make sure that the system connector is not damaged



Replace system connector if necessary.



If fault still remains, send the unit to higher level according to local company directives Fig. 3.1





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Trouble Shooting Guide, Electrical



4 Display / Illumination Problems



â€Ã³ Check the LCD Zif connector if it’s (Fig. 4.1) if it’s incorrectly soldered, Mechanically damaged, dirty or oxidized.





Replace it if necessary.

â€Ã³ If the LCD connector is OK, replace the Display assembly (Fig 4.2) If fault still remains, send the unit to higher level according to local company directives.





Fig. 4.1





Fig. 4.2





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Trouble Shooting Guide, Electrical



5 Charging Problems





â€Ã³ Check the System Connector (Fig. 5.1) if it’s incorrectly soldered, Mechanically damaged, dirty or oxidized.





Replace the System Connector (Fig 5.2) if it’s necessary.





If fault still remains, send the unit to higher level according to local company directives Fig. 5.1

Fig. 5.2





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Trouble Shooting Guide, Electrical



6 LED

Problems



â€Ã³ Test the LEDÅ› by using Service Function – LED test, to make sure if the problem is caused by a defect LED.

â€Ã³ Check the Keypad LEDÅ› (Fig. 6.1) if it’s incorrectly soldered or damaged.

Replace LED if necessary.

â€Ã³ Check the Display LEDÅ› (Fig. 6.2) if it’s incorrectly soldered or damaged.

Replace Display LED if necessary.





Note:



Always take off the dome foil before soldering / replacing LED (Fig 6.3).

Refer to Mechanical work instruction.





If fault still remains, send the unit to higher level according to local company directives





Fig. 6.2





Fig. 6.1





Fig. 6.3

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Trouble Shooting Guide, Electrical



7 Alert

Problems

â€Ã³ Test the Buzzer by using Service Function – Buzzer test.

â€Ã³ Check the Buzzer (Fig. 7.1) if it’s incorrectly soldered.





Replace the Buzzer if necessary.



If fault still remains, send the unit to higher level according to local company directives Fig. 7.1





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Trouble Shooting Guide, Electrical



8 Microphone

Problem



â€Ã³ Use Service Function – Earphone test to make sure that the speaker is working properly.

â€Ã³ Test the microphone by using Service Function – Microphone Audio Loop test.

Replace the microphone (Fig 8.1) if it’s necessary.

â€Ã³ Check the microphone holder (Fig. 8.2) if it’s incorrectly soldered, dirty or oxidized.





Replace the microphone holder if it’s necessary.



If fault still remains, send the unit to higher level according to local company directives





Fig. 8.1

Fig. 8.2





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Trouble Shooting Guide, Electrical



9 Real time clock problem

â€Ã³ Check the RTC Backup Battery(Fig. 9.1) if it’s incorrectly soldered, Mechanically damaged, dirty or oxidized.

â€Ã³ Replace the RTC Backup battery if it’s necessary.

â€Ã³ Use Service function – Real time clock test to make sure that RTC is working properly.



If fault still remains, send the unit to higher level according to local company directives





Fig. 9.1





10 SIM Card recognition Problem

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Trouble Shooting Guide, Electrical





â€Ã³ Check the SIM Card Connector (Fig. 10.1) if it’s incorrectly soldered, Mechanically damaged, dirty or oxidized.





Replace the SIM Connector (Fig 10.2) if it’s necessary.



If fault still remains, send the unit to higher level according to local company directives





Fig. 10.1

Fig. 10.2





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Trouble Shooting Guide, Electrical



11 Revision history

Rev. Date

Changes / Comments

A 2002-07-02

First

release

B 2002-09-04

Minor

changes



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