Sony-Ericsson W950 Service Manual Trouble Shooting
Trouble Shooting Guide, Mechanical
Trouble Shooting Guide, Mechanical
Applicable for W950i and W950c
Contents
General ...............................................................................................................2
1
1.1 Service functions in the software...........................................................2
1.2 Misuse and other no warranty issues ....................................................3
2 Appearance Problems....................................................................................... 6
3 Network/Signal Problems .................................................................................8
4 On/Off Problems ..............................................................................................10
5 Audio Problems ...............................................................................................12
6 Key Problems................................................................................................... 15
7 Display Problems ............................................................................................18
8 Illumination Problems .....................................................................................20
9 Alert Problems .................................................................................................22
10 SIM Problems...................................................................................................24
11 Charging/Capacity Problems .........................................................................25
12 Data Communication Problems .....................................................................27
13 Media Memory Problems ................................................................................28
14 Software Problems ..........................................................................................29
15 Revision History ..............................................................................................30
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Trouble Shooting Guide, Mechanical
1 General
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.
1.1 Service functions in the software
The service menu will be accessed with the following key combination. Use the jog dial and keyboard.
▲*▼▼*▼*
They are as follows:
Service information
Service tests
Format internal disk
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:
Display
Touch screen
Illumination
LED’s
Keyboard
Vibrator
Speaker’s
Microphone
Memory stick
NOTE: Different names may occur depending on language setting and customization.
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Trouble Shooting Guide, Mechanical
1.2 Misuse 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.
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LCD cracked due to
drop.
Clear scratches Mark after drop Corrosion components
on the PCB.
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Corrosion components on
Corrosion components on the
the PCB.
Components around system
connector damaged by liquid
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.
PCB.
SIM reader damaged by
liquid.
System connector pad(s)
damaged by liquid
System connector damaged by
liquid
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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).
This sticker is ok This sticker is not ok
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.
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Fig. 1.2.2 Fig. 1.2.3
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.
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2 Appearance Problems
Problem Area Items to Check Repair Action Reference Image
Appearance
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
Visually inspect for improper gap
between seams
• 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
• Reassemble or replace damaged parts
as necessary.
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Trouble Shooting Guide, Mechanical
Problem Area Items to Check Repair Action Reference Image
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Trouble Shooting Guide, Mechanical
3 Network/Signal Problems
Problem Area Items to Check Repair Action Reference Image
No Signal or Poor
Signal
Before proceeding ! Perform a flash upgrade.
Visually inspect SIM holder
Visually inspect antenna contact pads
• If dirty, oxidized or damaged – Replace
the SIM PWB ASM.
• If dirty or oxidized – Send to electrical
repair center
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Visually inspect antenna
• If dirty, damaged or oxidized – Replace
Antenna ASM.
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Trouble Shooting Guide, Mechanical
Problem Area Items to Check Repair Action Reference Image
If the issue has not been resolved !
• Handle the unit according to local
directives.
No signal when
using external
antenna (ex. Hands
free in car).
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Connect the phone to a handsfree car
kit connected with external antenna.
Visually inspect the antenna bar on the
phone.
If the issue has not been resolved !
• If no or only very less signal – Push
the middle pin of the ext. antenna
connector a few times.
Note: Be gently it might damage the
connector.
• Handle the unit according to local
directives.
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