Sony Ericsson W910 User manual

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/129 A
Company Internal
© Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, Mechanical
Applicable for W910
Contents
1
General ...............................................................................................................2
1.1 Service functions in the software...........................................................2
1.2 Misuse and other no warranty issues ....................................................3
2 Appearance Problems.......................................................................................7
3 Network/Signal Problems .................................................................................8
4 On/Off Problems .............................................................................................. 10
5 Audio Problems ............................................................................................... 11
6 Key Problems...................................................................................................14
7 Slider Problems ............................................................................................... 16
8 Display Problems ............................................................................................17
9 Illumination Problems .....................................................................................18
10 Alert Problems ................................................................................................. 19
11 SIM Problems...................................................................................................20
12 Charging/Capacity Problems .........................................................................21
13 Camera Problems ............................................................................................ 22
14 Data Communication Problems .....................................................................25
15 Software Problems ..........................................................................................26
16 Revision History ..............................................................................................27

Trouble Shooting Guide, Mechanical
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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 navigation keys ⇒*⇐⇐*⇐*
They are as follows:
Service info
Service settings
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
Flash LED
Video call camera
Memory Stick
FM Radio
Real time clock
Total call time
NOTE: Different names will occur depending on language setting and customization.

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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.
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

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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).
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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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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2 Appearance 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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3 Network/Signal Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved by
a regular software update.
Visually inspect SIM holder. •If dirty or oxidized – Clean it
•If damaged – Handle the unit
according to local directives.
Visually inspect antenna contact pads
and the antenna connector.
•If dirty or oxidized – Clean it
•If damaged – Replace it.
Visually inspect the Speaker Flex
Module.
•If dirty or oxidized – Clean it.
•If damaged – Replace it.
Visually inspect the Antenna Coax and
Speaker Flex BtB connected to the
Main PCB.
•If improperly connected – Re-establish
proper connection.
•If damaged – Replace the Speaker
Flex Module.
No Signal or Poor
Signal
If the issue has not been resolved !
•Handle the unit according to local
directives.

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Problem Area Items to Check Repair Action Reference Image
Connect the phone to a handsfree car
kit connected with external antenna.
Visually inspect the antenna bar on the
phone.
•If no or only very less signal – Push
the middle pin of the ext. antenna
connector a few times.
Note: Take care not to scratch the gold
surface.
No signal when
using external
antenna (ex.
Hands free in car)
If the issue has not been resolved !•Handle the unit according to local
directives.

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4 On/Off Problems
Problem Area Items to Check Repair Action Reference Image
Check whether the phone vibrates 10 to
15 seconds after pressing the power
key and whether the keypad
illuminates.
•If activation of the vibrator or keypad
are detected, refer to the “Display
Problems” chapter 8
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved be
a regular software update.
Cannot be power on,
Cannot be detected on USB cable on
EMMA III.
1. Log on to EMMA III as usual.
2. Use SEPI A1 with power charger
attached.
3. Press keys 2 and 5 when you connect
the phone.
Visually inspect contact pads on
battery.
•If dirty or oxidized – Clean pads.
•If damaged – Replace the battery.
Visually inspect battery connector. •If dirty or oxidized – Clean it.
Note: Take care not to bend the
connector pin’s
•If damaged – Handle the unit
according to local directives.
Visually inspect the power key. •If damaged – Replace on/off key.
Power On
problems
If the issue has not been resolved !•Handle the unit according to local
directives.

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5 Audio Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved be
a regular software update.
Visually inspect the microphone. •If clogged – Clean.
Note: It can easily happen that the
customer blocks the microphone port
with their hand.
If no fault found. Please inform the
customer where the port is and that it
is important not to cover it during calls
Microphone:
If the issue has not been resolved !•Handle the unit according to local
directives.
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved be
a regular software update.
Receiver
(earphone):
No sound or poor
quality sound Visually inspect receiver’s external port. •If clogged – Clean or replace the front.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect whether the Receiver
Flex Module BtB is properly connected
to its connector on the Navi Key PBA.
•If improperly connected – Re-establish
proper connection.
•If Receiver Flex Module is damaged –
Replace it.
Visually inspect whether the Slider Flex
is properly connected to its connector
on the Navi Key PBA and the Main
PCB.
•If improperly connected – Re-establish
proper connection.
•If the Slider Flex is damaged –
Replace it.
•If the BtB connector on the Navi Key
PBA is damaged – Replace the Navi
Key PBA.
•If the BtB connector on the Main PCB
is damaged – Handle the unit
according to local directives.
If the issue has not been resolved !•Handle the unit according to local
directives.
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved be
a regular software update.
Speaker:
No sound or poor
quality sound
Visually inspect the speaker’s external
port.
•If clogged – Clean or replace the Rear
Back Cover.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect the Speaker Flex BtB
connected to the Main PCB.
•If improperly connected – Re-establish
proper connection.
•If damaged – Replace the Speaker
Flex Module.
If the issue has not been resolved !•Handle the unit according to local
directives.

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6 Key Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect for debris between
Keyboard Main and Key Foil Assy, also
for damage to the Kayboard and the
numeric Key Foil Assy.
•If dirty – Clean it.
•If damaged – Replace Keyboard Main
and/or Key Foil Assy as necessary.
Keyboard
Numeric:
A key on the main
keyboard (1.2.3…)
is not functioning or
is intermittent
If the issue has not been resolved !•Handle the unit according to local
directives.
Visually inspect for debris between the
Navi Key and the Navi Key PBA, also
for damage to the Navi Key and the
Navi Key PBA.
•If dirty – Clean it.
•If damaged – Replace the Navi Key
and/or theNavi Key PBA as necessary.
Visually inspect whether the Slider Flex
is properly connected to its connector
on both the Main PCB and the Navi Key
PBA.
•If improperly connected – Re-establish
proper connection.
•If the Slider Flex is damaged –
Replace it.
•If any of the BtB connectors on the
Navi Key PBA are damaged – Replace
the Navi Key PBA.
•If the BtB connector on the Main PCB
is damaged – Handle the unit
according to local directives.
Keyboard
Navigation:
A key on the sub
keyboard (navi
keys) is not
functioning or is
intermittent
If the issue has not been resolved !•Handle the unit according to local
directives.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect for debris between the
Game Keys and the Receiver Flex
Module, also for damage to the Game
Keys and the Receiver Flex Module.
•If dirty – Clean it.
•If damaged – Replace the Game Keys
and/or the Receiver Flex Module as
necessary.
Visually inspect whether the Receiver
Flex Module is properly connected to its
connector on the Navi Key PBA.
•If improperly connected – Re-establish
proper connection.
•If main flex is damage – Replace it.
Visually inspect whether the Slider Flex
is properly connected to its connectors
on the Navi Key PBA and the Main
PCB.
•If improperly connected – Re-establish
proper connection.
•If the Slider Flex is damaged –
Replace it.
•If any of the BtB connector on the Navi
Key PBA are damaged – Replace the
Navi Key PBA.
•If the BtB connector on the Main PCB
is damaged – Handle the unit
according to local directives.
Game keys
If the issue has not been resolved !•Handle the unit according to local
directives.

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7 Slider Problems
Problem Area Items to Check Repair Action Reference Image
Inspect whether the Slider opens and
closes properly.
•If there are any problems – Replace
the Slider.
If the display do not change when open
or close.
•If damaged – Replace it.
Slider
The slider can not
open or close
If the issue has not been resolved !•Handle the unit according to local
directives.

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8 Display Problems
Problem Area Items to Check Repair Action Reference Image
Check whether the phone vibrates 10 to
15 seconds after pressing the power
key and whether the keypad illuminates
•If activation of the vibrator are not
detected, refer to the On/Off
Problems” chapter 4
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved be
a regular software update.
Visually inspect whether the Display
flex film is properly connected to its
connector on the Navi Key PBA.
•If improperly connected – Re-establish
proper connection.
•If damaged – Replace the Navi Key
PBA or the Display as necessary.
Visually inspect whether the Slider Flex
is properly connected to its connectors
on both the Navi Key PBA and the Main
PCB.
•If improperly connected – Re-establish
proper connection.
•If the Slider Flex is damaged –
Replace it.
•If the BtB connector on the Navi Key
PBA is damaged – Replace the Navi
Key PBA.
•If the BtB connector on the Main PCB
is damaged – Handle the unit
according to local directives.
Display
If the issue has not been resolved !•Replace the Display.
NOTE: Misuse is not covered by
warranty. Refer to chapter 1.2

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Problem Area Items to Check Repair Action Reference Image
If the issue has not been resolved !•Handle the unit according to local
directives.
9 Illumination Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding !•Do software update content refresh.
Note: this problem will not be solved be
a regular software update.
LCD illumination Refer to “Display” section under “Display Problems”
Key numeric
illumination:
Refer to “Keyboard numeric ” section under “Key Problems”
Key navigation
illumination:
Refer to “Keyboard navigation ” section under “Key Problems”

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10 Alert Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding !•Do a software update content refresh.
Note: this problem will not be solved by
a regular software update.
Vibrator:
If the issue has not been resolved !•Handle the unit according to local
directives.
Loudspeaker Refer to “loudspeaker” section under “Audio Problems”

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11 SIM Problems
Problem Area Items to Check Repair Action Reference Image
SIM undetected
(Insert SIM)
Visually inspect SIM holder •If dirty or oxidized – Clean it.
•If damaged – Handle the unit
according to local directives.
Unit indicates an
incorrect SIM is
inserted (Insert
correct SIM)
Check whether the phone is locked to a
particular carrier and whether the
correct carrier’s SIM is being used
•Use Correct Carrier SIM or test SIM.
If the issue has not been resolved !•Handle the unit according to local
directives.