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Trouble Shooting Guide, Mechanical
Trouble Shooting Guide, Mechanical
Applicable for W710 and Z710
Contents
1 General ................................................................................................................................. 2
2 Power Problems.................................................................................................................... 3
3 Network/Signal Problems......................................................................................................4
4 Audio Problems.....................................................................................................................5
Microphone: ................................................................................................................... 5
Receiver:........................................................................................................................ 5
Rear Speaker:................................................................................................................ 6
5 Key Problems........................................................................................................................ 8
Keypad:.......................................................................................................................... 8
Navigation Key:.............................................................................................................. 8
Volume key: ................................................................................................................... 8
Camera key ...................................................................................................................8
Phone Lock Key............................................................................................................. 9
Play/Stop Key ................................................................................................................ 9
Menu/Toggle Key........................................................................................................... 9
“Next” Key....................................................................................................................10
“Previous” Key ............................................................................................................. 10
6 Display Problems ................................................................................................................11
7 Illumination Problems..........................................................................................................14
Keypad Illumination: The entire keypad will not illuminate .........................................14
Keypad Illumination: A portion of the keypad does not illuminate .............................14
Navigation Key Illumination: ........................................................................................14
Display Illumination:..................................................................................................... 15
8 Alert Problems..................................................................................................................... 17
Vibrator: .......................................................................................................................17
Rear speaker: .............................................................................................................. 18
9 Charging/Capacity Problems ..............................................................................................19
10 Camera Problems ............................................................................................................... 20
11 IR Problems ........................................................................................................................ 21
4/000 21-1/FEA 209 544/601 B
© Sony Ericsson Mobile Communications AB
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Trouble Shooting Guide, Mechanical
12 SIM Problems...................................................................................................................... 21
13 Direct Connection Communication Problems .....................................................................22
14 Bluetooth Problems............................................................................................................. 22
15 Hands-Free Problems ......................................................................................................... 23
16 Revision History .................................................................................................................. 23
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 unit, this document should be used in conjunction with the Test
Instructions, Mechanical and the Working Instructions, Mechanical.
NOTE! A unit should always be inspected for liquid damage and flashed with latest software before using the
Mechanical Trouble Shooting Guide. Refer to the Mechanical Test Instructions for details regarding inspecting
for liquid damage and upgrading software.
NOTE! If all of the repair actions listed in this document for addressing a problem have been performed and a unit still
is not working, handle the unit according to your local company directives
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© Sony Ericsson Mobile Communications AB
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Trouble Shooting Guide, Mechanical
2 Power Problems
Problem Area
Unit will not
Power On
Items to Inspect
Check whether the phone vibrates
and the keypad illuminates when you
press the power key
Inspect battery connector
If the issue has not been resolved!
If the issue is still not resolved!
Repair Action
If activation of the vibrator and keypad
are detected, refer to the “Display
Problems” section
• If dirty or oxidized – Clean
• If damaged – Send to an electrical
repair location
• Replace the keypad and the dome
array
• Escalate to an electrical repair level
Inspection Reference
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Trouble Shooting Guide, Mechanical
3 Network/Signal Problems
Problem Area
No Signal or Poor
Signal
Items to Inspect
Inspect SIM holder
Inspect antenna-to-board spring
connectors
If the issue has not been resolved !
Repair Action Inspection Reference
• If dirty or oxidized – Clean
• If damaged – Send to an electrical
repair location
• If dirty or oxidized – Clean the
antenna-to-board spring connectors
and replace the rear speaker box
• If damaged – Send to an electrical
repair location
• Replace the rear speaker box
If the issue is still not resolved!
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• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
4 Audio Problems
Problem Area
Microphone:
Receiver:
No sound or poor
quality sound
Items to Inspect
Before proceeding !
Inspect the microphone’s external
port
If the issue is still not resolved!
Before proceeding !
Inspect the receiver’s external ports
Inspect the receiver’s contact pads
on the flip flex assembly
Repair Action
• Perform a setting reset
• If clogged – Replace the keypad,
dome foil, and the microphone cloth.
Also clean the microphone
• Escalate to an electrical repair level
• Perform a setting reset
• If clogged – Replace the inner flip
cover, the receiver tape, and the
receiver
• If dirty - Clean
• If damaged – Replace the flip flex
assembly
Inspection Reference
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Trouble Shooting Guide, Mechanical
Problem Area
(Continuation)
Receiver:
Items to Inspect
If the issue has not been resolved !
• Replace receiver, if it has not been
replaced
Repair Action
Inspection Reference
No sound or poor
quality sound
Rear Speaker:
No sound or poor
quality sound
If the issue is still not resolved !
If the issue is still not resolved!
Before proceeding !
Inspect whether the rear speaker’s
external port is clogged
Inspect the rear speaker cloth
• Replace the flip flex assembly, if it
has not been replaced
• Escalate to an electrical repair level
• Perform a setting reset
• If clogged – clean/replace the battery
door as necessary
• If dirty or damaged - Replace the
rear speaker cloth
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Trouble Shooting Guide, Mechanical
Problem Area
(Continuation)
Rear Speaker:
No sound or poor
quality sound
Items to Inspect
Inspect the rear speaker connection
springs on the circuit board
• If dirty or oxidized – Clean both
springs and replace the rear speaker
assembly
• If damaged – Send to an electrical
repair location
Repair Action
Inspection Reference
If the issue has not been resolved !
If the issue is still not resolved!
• Replace rear speaker assembly, if it
has not already been replaced
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
5 Key Problems
Problem Area
Keypad:
A key on the
keypad is not
functioning or is
intermittent
Navigation Key:
Volume key:
Camera key
Items to Inspect
Perform the following !
If the issue is still not resolved!
Refer to “Keypad” section under “Key Problems”
Inspect the side key flex assembly,
the side key flex assembly’s
connection to the circuit board, and
the volume key
If the issue has not been resolved!
Inspect the side key flex assembly,
the side key flex assembly’s
connection to the circuit board, and
the camera key
• Replace keypad and dome array
• Escalate to an electrical repair level
• If the side key flex assembly appears
to have any issue with its connection
to the circuit board, try reconnecting
the side key flex assembly to the
circuit board.
• Otherwise, replace the side key flex
assembly and if necessary the
volume key
• Escalate to an electrical repair level
• Replace the side key flex assembly
and if necessary the camera key
Repair Action
Inspection Reference
If the issue has not been resolved !
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© Sony Ericsson Mobile Communications AB
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
Phone Lock Key
Inspect the phone lock key !
• If dirty or damaged – Clean/replace
the key as necessary
Play/Stop Key
Menu/Toggle
Key
Inspect the phone lock switch !
If the issue has not been resolved!
Perform the following !
If the issue has not been resolved!
Perform the following !
• If dirty, clean the switch.
• If damaged, escalate to an electrical
repair level.
• Escalate to an electrical repair level
• Replace the outer flip cover and the
flip flex assembly
• Escalate to an electrical repair level
• Replace the outer flip cover and the
flip flex assembly
If the issue has not been resolved!
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• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
“Next” Key
Perform the following !
• Replace the outer flip cover and the
flip flex assembly
“Previous” Key
If the issue has not been resolved!
Perform the following !
If the issue has not been resolved!
• Escalate to an electrical repair level
• Replace the outer flip cover and the
flip flex assembly
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
6 Display Problems
Problem Area
If neither the
inner or out
display is
functioning
Items to Inspect
Check whether the phone vibrates
and the keypad illuminates when you
press the power key
Inspect whether the main flex
assembly is properly connected to
the circuit board
Inspect each half of the main flex
assembly to circuit board connection
Repair Action
• If activation of the vibrator and
keypad are not detected, refer to the
“Power Problems” section
• If improperly connected - establish
proper connection
• If dirty or oxidized – Clean both
halves of the connection
• If the portion of the connector on the
main flex assembly is damaged Replace the main flex assembly
• If the portion of the connector on the
circuit board is damaged – Send to
an electrical repair location
Inspection Reference
Inspect whether the main flex
assembly is properly connected to
the display assembly
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• If improperly connected - Reestablish
proper connection
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Trouble Shooting Guide, Mechanical
Problem Area
(Continuation)
If neither the
inner or out
display is
functioning
Items to Inspect
Inspect each half of the main flex
assembly to display assembly
connection
• If dirty or oxidized – Clean both
halves of the connection
• If the portion of the connector on the
main flex assembly is damaged Replace the main flex assembly
Repair Action
Inspection Reference
• If the portion of the connector on the
display assembly is damaged Replace the display assembly
If the issue has not been resolved !
If the issue is still not resolved !
If the issue is still not resolved !
• Replace the display assembly if it
has not been replaced
• Replace the main flex assembly if it
has not been replaced
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
Problem Area Items to Inspect Repair Action Inspection Reference
If one of the two
displays is not
functioning
Outer Display Only:
Before proceeding !
• First check the external contrast
setting for the outer display. Refer to
the Mechanical Test Instructions for
the procedure on how to check the
external contrast.
Verify the magnet is in place.
If the issue is not resolved !
If the issue is still not resolved !
• If the magnet is not present, install
one.
• Replace the display assembly
• Replace the main flex assembly
If the issue is still not resolved !
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• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
7 Illumination Problems
Problem Area
Keypad
Illumination:
The entire keypad
will not illuminate
Keypad
Illumination: A
portion of the
keypad does not
illuminate
Navigation Key
Illumination:
Items to Inspect
Before proceeding !
Perform the following action !
Perform the following action !
Perform the following action !
Repair Action
• Perform a setting reset
• Send to an electrical repair location
• Send to an electrical repair location
• Send to an electrical repair location
Inspection Reference
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Trouble Shooting Guide, Mechanical
Display
Illumination:
Before proceeding !
Inspect whether the main flex
assembly is properly connected to
• Perform a setting reset
• If improperly connected - Reestablish
proper connection
the circuit board
Inspect each half of the main flex
assembly to circuit board connection
Inspect whether the main flex
assembly is properly connected to
the display assembly
• If dirty or oxidized – Clean both
halves of the connection
• If the portion of the connector on the
main flex assembly is damaged Replace the main flex assembly
• If the portion of the connector on the
circuit board is damaged – Send to an
electrical repair location
• If improperly connected - Reestablish
proper connection
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Trouble Shooting Guide, Mechanical
(Continuation)
Display
Illumination:
Inspect each half of the display to
main flex assembly connection
• If dirty or oxidized –clean both halves
of the connection
• If the portion of the connector on the
display assembly is damaged Replace the display assembly
• If the portion of the connector on the
main flex assembly is damaged Replace the main flex assembly
If the issue has not been resolved !
If the issue is still not resolved !
If the issue is still not resolved !
• Replace the display assembly
• Replace the main flex assembly
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
8 Alert Problems
Problem Area
Vibrator:
Items to Inspect
Before proceeding !
Inspect the vibrator contact pads on
the flip flex assembly.
Perform the following action !
Perform the following action !
Repair Action
• Perform a setting reset
• If dirty – Clean
• Replace the vibrator
• Replace the flip flex assembly
Inspection Reference
If the issue is still not resolved !
4/000 21-1/FEA 209 544/601 B
© Sony Ericsson Mobile Communications AB
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
Problem Area
Rear speaker:
No sound or poor
quality sound
Items to Inspect
Before proceeding !
Inspect whether the rear speaker’s
external port is clogged
• Perform a setting reset
• If clogged – clean/replace the battery
door as necessary
Repair Action
Inspection Reference
Inspect the rear speaker cloth
Inspect the rear speaker connection
springs on the circuit board
If the issue has not been resolved !
• If dirty or damaged - Replace the rear
speaker cloth
• If dirty – Clean both springs and
replace the rear speaker assembly
• If damaged – Send to an electrical
repair location
• Replace the rear speaker assembly if
it has not been replaced
If the issue is still not resolved !
4/000 21-1/FEA 209 544/601 B
© Sony Ericsson Mobile Communications AB
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
9 Charging/Capacity Problems
Problem Area
Phone is not
charging properly
Items to Inspect
Inspect the battery connector
If the issue has not been resolved !
If the issue is still not resolved !
• If dirty or oxidized – Clean
• If damaged – Send to an electrical
repair location
• Replace the system connector
• Escalate to an electrical repair level
Repair Action
Inspection Reference
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Trouble Shooting Guide, Mechanical
10 Camera Problems
Problem Area
Lines or marks in
picture
Will not capture
an image
Items to Inspect
Perform the following action !
If the issue has not been resolved !
If the issue is still not resolved !
Perform the following action !
Repair Action
• Clean the camera lens
• Replace the camera module and
main flex assembly
• Escalate to an electrical repair level
• Replace camera module and main
flex assembly
Inspection Reference
If the issue is still not resolved !
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• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
11 IR Problems
Problem Area
Will not connect
with a functional
infrared device
Items to Inspect
Inspect the infrared window
If the issue has not been resolved !
12 SIM Problems
Problem Area
SIM undetected
Items to Inspect
Inspect SIM holder
Repair Action
• If dirty – Clean
• If scratched or damaged – Replace
infrared window
• Escalate to an electrical repair level
Repair Action
• If dirty or oxidized – Clean
• If damaged – Send to an electrical
repair location
Inspection Reference
Inspection Reference
If the issue has not been resolved !
Unit indicates the
incorrect SIM is
inserted
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Check whether the phone is locked
to a particular carrier and whether
the correct carrier’s SIM is being
used
If the issue has not been resolved !
© Sony Ericsson Mobile Communications AB
• Escalate to an electrical repair level
• Use Correct Carrier SIM or test SIM
• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
13 Direct Connection Communication Problems
Problem Area
Problem
transferring data
using a direct
connection
Items to Inspect
Perform the following action !
If the issue has not been resolved !
14 Bluetooth Problems
Problem Area
Problem
transferring data
using a Bluetooth
connection
Items to Inspect
Perform the following action !
Repair Action
• Replace the system connector
• Escalate to an electrical repair level
Repair Action
• Replace the system connector
Inspection Reference
Inspection Reference
If the issue has not been resolved !
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• Escalate to an electrical repair level
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Trouble Shooting Guide, Mechanical
15 Hands-Free Problems
Problem Area
Hands-free not
working
Items to Inspect
Perform the following action !
If the issue has not been resolved !
16 Revision History
Rev. Date Changes / Comments
A 06 - August 31 Initial Release
B 06 – October 26 Added a statement to the “If one of the displays is not fuctioning” section that if the outer display is not
working to first check the external contrast setting for the outer display.
Repair Action
• Replace the system connector
• Escalate to an electrical repair level
Inspection Reference
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© Sony Ericsson Mobile Communications AB
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