Sony Ericsson C702 User manual

Trouble Shooting Guide Repair Instruction Mechanical/, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 1213-5331
Trouble Shooting Guide, Mechanical
Applicable for C702, C702a & C702c
Contents
1General ...............................................................................................................2
1.1 Service functions in the software...........................................................2
1.2 Misuse and other no warranty issues....................................................3
2Appearance Problems.......................................................................................7
3Network/Signal Problems .................................................................................9
4On/Off Problems..............................................................................................12
5Audio Problems...............................................................................................14
6Key Problems...................................................................................................18
7Display Problems ............................................................................................20
8Illumination Problems.....................................................................................21
9Alert Problems.................................................................................................23
10 SIM Problems...................................................................................................24
11 FM Radio Problems.........................................................................................25
12 M2 Memory Problems .....................................................................................26
13 Charging/Capacity Problems .........................................................................27
14 Camera Problems............................................................................................29
15 Data Communication Problems .....................................................................34
16 Software Problems..........................................................................................37
17 Revision History..............................................................................................38

Trouble Shooting Guide Repair Instruction Mechanical/, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 2(38)
1General
This document outlines the mechanical repairs that should be made in an attempt to fix the common failures that are seen in the
field. To gain a complete understanding of how to test and repair a specific failure, this document should be used in conjunction
with the Test Instructions, Mechanical and the Working Instructions, Mechanical.
1.1Service functions in the software
The service menu will be accessed with the following key combination. Use the joystick.
⇒*⇐⇐*⇐*
They are as follows:
Service info
Service tests
Text labels
The phones software has a built in service functionality that allows you to test some of the phones functions. (See point 2 above) It
looks like this:
Main display
LED/illumination
Keyboard
Speaker
Earphone
Microphone
Vibrator
Camera
Memory Stick
Real time clock
Total call time
NOTE: Different names may occur depending on language setting and customization.

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1.2Misuse and other no warranty issues
Misuse is not covered by warranty. This chapter will explain what’s not covered by warranty. Phones that have been exposed to
misuse will not be covered by warranty.
This means: if it is possible to repair the phone, the customer will have to pay for the repair. SEMC will not allow any of these
phones to be claimed into WCMS. Some local perspectives may interfere with this. Please reference to local directives.
1.2.1 Action
Make a general visual inspection for misuse.
Below are some examples of what is not covered by warranty.
Front window broken
due to misuse. LCD cracked due to drop. Clear scratches Mark after drop Corrosion components on the PCB.

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Corrosion components on
the PCB. Corrosion components on the PCB. SIM reader damaged by liquid. System connector damaged by liquid
Components around system
connector damaged by liquid System connector pad(s) damaged by liquid Battery O-ring broken due to misuse

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1.2.2 Liquid damage sticker
In the phone there is placed a sticker that can give you a hint to see if the phone is damage by liquid or not. This sticker is located
near the SIM reader (Fig. 1.2.1) and it is possible to see it without disassemble the phone.
Fig. 1.2.1
On the pictures below you will see the different between a sticker that has been in contact with liquid (Fig. 1.2.3) and with one that
hasn’t (Fig. 1.2.2).

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1.2.3 Action
Make a general visual inspection for misuse, corrosion or oxidation from liquid damage. No further action should be taken for a liquid
damaged phone. Handle the unit according to local directives.
This sticker is ok This sticker is not ok
The white sticker that has been in contact with
liquid turns into a red or pink sticker. In this
case you should check the phone for liquid
damage
(See point 1.1.1) .
Note: There must be clear marks after liquid on
the PCB before rejecting the phone for repair.
Fig. 1.2.2 Fig. 1.2.3

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2Appearance Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect the cosmetic quality of
all user viewable surfaces •If dirty – Clean parts as necessary.
•If unacceptably scratched or damaged
– Replace damage parts as necessary.
NOTE: Misuse is not covered by
warranty. Refer to chapter 1.2
Visually inspect all keys •If dirty – Clean parts as necessary.
•If unacceptably scratched or damaged
– Replace damaged parts as
necessary.
NOTE: Misuse is not covered by warranty.
Refer to chapter 1.2
Appearance
Visually inspect for improper gap
between seams •Reassemble or replace damaged parts
as necessary.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect Battery O-ring •If loose – Put parts back.
•If unacceptably missing or damaged –
Replace Back Cover Assy as
necessary.
NOTE: Misuse is not covered by warranty.
Refer to chapter 1.2

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3Network/Signal Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding ÆPerform a flash upgrade.
Visually inspect SIM holder •If dirty or oxidized – Clean it.
•If damaged – Send to an electrical
repair location.
No Signal or Poor
Signal
Visually inspect antenna contact pins. •If dirty or oxidized – Clean the pins.
•If damaged – Send to an electrical
repair location.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect antenna •If dirty, oxidized or damaged – Replace
it.
If the issue has not been resolved Æ•Handle the unit according to local
directives.