Sony Ericsson T650 User manual

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/118 A
Company Internal
© Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, Mechanical
Applicable for T650 and T658
Contents
1 General ................................................................................................................................. 3
1.1 Service functions in the software .......................................................................... 3
1.2 Misuse and other no warranty issues ................................................................... 4
2 Power Problems.................................................................................................................... 7
3 Network/Signal Problems...................................................................................................... 8
4 Audio Problems..................................................................................................................... 9
Microphone: ................................................................................................................... 9
Receiver:........................................................................................................................ 9
Rear Speaker:.............................................................................................................. 11
5 Key Problems...................................................................................................................... 12
Keyboard: .................................................................................................................... 12
Functional Keyboard:................................................................................................... 13
Navigation Key:............................................................................................................ 13
Numeric Keyboard: ...................................................................................................... 13
Volume key: ................................................................................................................. 14
Power Key: .................................................................................................................. 15
Camera Key:................................................................................................................ 16
6 Display Problems ................................................................................................................17
7 Illumination Problems..........................................................................................................19
Keyboard Illumination: ................................................................................................. 19
Navigation Key Illumination: ........................................................................................19
Display Illumination:..................................................................................................... 19
8 Alert Problems..................................................................................................................... 20
Rear speaker: .............................................................................................................. 20
9 Charging/Capacity Problems .............................................................................................. 21
10 Rear Camera Problems ...................................................................................................... 22
11 Video Call Camera Problems – T650 Only ......................................................................... 24
12 SIM Problems...................................................................................................................... 25
13 Data Transfer Problems using a Data Cable ...................................................................... 25

Trouble Shooting Guide, Mechanical
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14 Bluetooth Problems............................................................................................................. 26
15 Memory Stick Problems ...................................................................................................... 26
16 Hands-Free Problems ......................................................................................................... 27
17 Revision History .................................................................................................................. 28

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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 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
Video call camera
Flash LED
Memory Stick
FM radio (You need a headset to test)
Real time clock
Total call time
NOTE: Different names may 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
On the pictures below you will see the different between a sticker that has been in contact with liquid (Fig. 1.2.2) and with one that
hasn’t (Fig. 1.2.1).
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
Text
Fig. 1.2.1 Fig. 1.2.2

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2 Power Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Check whether the keyboard
illuminates 15 to 20 seconds after
pressing the power key
If illumination of the keyboard is detected,
refer to the “Display Problems” section
Inspect battery connector •If dirty or oxidized – Clean
•If damaged – Send to an electrical
repair location
Inspect the power key and the power
key’s switch
•Make sure the power key is properly
positioned in the phone.
•If dirt or debris is detected – Clean
both the key and the switch
•If the key is damaged – Replace it
•If the switch is damaged – Escalate to
an electrical repair level
Unit will not
Power On
If the issue is still not resolved!•Escalate to an electrical repair level

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3 Network/Signal Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Inspect SIM holder •If dirty or oxidized – Clean
•If damaged – replace the Holder M2
and SIM assy
If the issue has not been resolved!•Clean the antenna-to-board
connectors on the circuit board and
replace the antenna/speaker box
assembly
No Signal or Poor
Signal
If the issue is still not resolved!•Escalate to an electrical repair level

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4 Audio Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Before proceeding !•Perform a setting reset
Inspect the microphone’s external
port
•If clogged – Clean the microphone
port in the board frame or replace the
Frame assy as determined
necessary.
Microphone:
If the issue is still not resolved!•Escalate to an electrical repair level
Before proceeding !•Perform a setting reset
Receiver:
No sound or poor
quality sound
Check if the receiver’s external ports
are clogged
•If clogged – Clean the external ports
in the front cover complete or replace
the front assy and/or earspeaker as
determined necessary

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Problem Area Items to Inspect Repair Action Inspection Reference
If the issue has not been resolved!
•Clean the receiver’s contact pads on
the circuit board and replace receiver
Receiver:
No sound or poor
quality sound
(Cont.)
If the issue is still not resolved!•Escalate to an electrical repair level

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Problem Area
Items to Inspect Repair Action Inspection Reference
Before proceeding !•Perform a setting reset
Inspect whether the rear speaker’s
external ports are clogged
•If clogged – Clean out the rear
speaker’s external ports and replace
the rear cover
If the issue has not been resolved!•Clean the rear speaker’s contact
pads on the circuit board and replace
antenna/speaker box assembly
Rear Speaker:
No sound or poor
quality sound
If the issue is still not resolved!•Escalate to an electrical repair level

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5 Key Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Inspect whether the keyfoil assembly
is properly connected to the circuit
board
•If improperly connected -
Reestablish proper connection
Inspect each half of the keyfoil to
circuit board connection
•If dirty or oxidized – Clean both
halves of the connection
•If the portion of the connection on
the key foil complete is damaged -
Replace the key foil complete
•If the portion of the connection on
the circuit board is damaged – Send
to an electrical repair location
If the issue has not been resolved !•Replace the key foil complete, if it
has not already been replaced
Keyboard:
None of the keys
on the keyboard
are functioning
(excluding the
navigation key)
If the issue is still not resolved!•Escalate to an electrical repair level

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Problem Area Items to Inspect Repair Action Inspection Reference
Inspect for debris between and/or
damage to the functional keyboard
and the corresponding portion of the
keyfoil assembly.
•If debris is found – Clean both parts
•If damage is seen – Replace the
functional keyboard and/or the key
foil complete as necessary
If the issue has not been resolved !•Replace the functional keyboard and
the key foil complete, if they have not
already been replaced
Functional
Keyboard:
A key on the
functional
keyboard is not
functioning or is
intermittent
If the issue is still not resolved!•Escalate to an electrical repair level
Navigation Key: Perform the following action !Escalate to an electrical repair level
Inspect for debris between and/or
damage to the numeric keyboard
and the corresponding portion of the
keyfoil assembly.
•If debris is found – Clean both parts
•If damage is seen – Replace the
numeric keyboard and/or the key foil
complete as necessary
If the issue has not been resolved !•Replace the numeric keyboard and
the key foil complete, if they have not
already been replaced
Numeric
Keyboard:
A key on the
numeric keyboard
is not functioning
or is intermittent
•

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Problem Area Items to Inspect Repair Action Inspection Reference
If the issue is still not resolved!•Escalate to an electrical repair level
Inspect the portion of the volume key
that is not functioning and its
corresponding switch.
•Make sure the volume key is
properly positioned in the Antenna
assembly.
•If dirt or debris is detected – Clean
the volume key and both switches
•If the key is damaged – Replace it
•If the switch is damaged – Escalate
to an electrical repair level
Volume key:
A direction of the
key is not
functioning or is
intermittent
If the issue has not been resolved !•Escalate to an electrical repair level
•
•

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Problem Area Items to Inspect Repair Action Inspection Reference
Inspect the power key and the power
key’s switch
•Make sure the power key is properly
positioned in the phone.
•If dirt or debris is detected – Clean
both the key and the switch
•If the key is damaged – Replace it
•If the switch is damaged – Escalate
to an electrical repair level
Power Key:
If the issue has not been resolved !•Escalate to an electrical repair level

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Problem Area Items to Inspect Repair Action Inspection Reference
Inspect the camera key and its
switch
•Make sure the camera key is
properly positioned in the front cover.
•Make sure the camera switch is
properly positioned in the Frame
assy.
•If dirt or debris is detected – Clean
both the camera key and its switch
•If the camera key is damaged –
Replace it
If the issue has not been resolved !•Replace the key foil complete
Camera Key:
If the issue is still not resolved!•Escalate to an electrical repair level

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6 Display Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Check whether the keyboard
illuminates 15 to 20 seconds after
pressing the power key
•If the keyboard does not illuminate,
refer to the “Power Problems” section
Inspect whether the LCD assembly’s
flex film is properly connected to the
circuit board
•If improperly connected - Reestablish
proper connection
Inspect each half of the LCD to
circuit board connection
•If dirty or oxidized – Clean both
halves of the connection
•If the portion of the connector on the
LCD is damaged - Replace the LCD
•If the portion of the connector on the
circuit board is damaged – Escalate
to an electrical repair level
If the issue has not been resolved !•Replace the LCD if it has not been
replaced
If a display is not
functioning
If the issue is still not resolved !•Escalate to an electrical repair level

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Problem Area Items to Inspect Repair Action Inspection Reference
Perform the following action !•Replace the LCD
If a display has
lines or missing
pixels
If the issue is still not resolved !•Escalate to an electrical repair level

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7 Illumination Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Perform the following action !•Replace the key foil complete
Keyboard
Illumination:
Neither the
numeric or the
functional
keyboard
illuminates If the issue is still not resolved!•Escalate to an electrical repair level
Perform the following action !•Replace the key foil complete
Keyboard
Illumination:
A portion of the
numeric or
functional
keyboard does not
illuminate If the issue is still not resolved!•Escalate to an electrical repair level
Navigation Key
Illumination: Refer to the “Keyboard” sections under “Illumination Problems”
Before proceeding !•Perform a setting reset
Perform the following action !•Replace the LCD
Display
Illumination:
If the issue is still not resolved !•Escalate to an electrical repair level

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8 Alert Problems
Problem Area Items to Inspect Repair Action Inspection Reference
Before proceeding !•Perform a setting reset
Inspect whether the rear speaker’s
external port is clogged
•If clogged – Clean out the rear
speaker’s external ports and replace
the rear speaker cloth
If the issue has not been resolved!•Clean the rear speaker’s contact
pads on the circuit board and replace
antenna/speaker box assembly
Rear speaker:
No sound or poor
quality sound
If the issue is still not resolved!•Escalate to an electrical repair level