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Trouble Shooting Guide, SP/Mech
Trouble Shooting Guide, SP/Mech
Applicable for T226, T230, T238
Contents
1 General Information................................................................................... 2
2 Appearance Problems ................................................................................ 3
3 Network Problems ..................................................................................... 4
4 On/Off Problems........................................................................................ 5
5 Audio Problems ......................................................................................... 6
6 Keypad/Volume Keys/Navigation Button Problems ................................. 7
7 Display/Illumination Problems .................................................................. 8
8 Capacity/Charging Problems ..................................................................... 9
9 Alert Problems ......................................................................................... 10
10 SIM Problems .......................................................................................... 11
11 Revision History ...................................................................................... 11
4/000 21-1/FEA 209 544/574 B
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
1 General Information
The Mechanical Troubleshooting Guide outlines the mechanical repairs that can be made to try
and fix the common failure areas that are seen in the field. The subsections under "General
Information" are steps that apply to all phones that are being looked at for repair at a mechanical
level. 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, SP/Mech and the Working
Instructions, SP/Mech.
1.1 Liquid Damage
Before any repair is made, an inspection for corrosion or oxidation from liquid damage should be
performed. If evidence of liquid damage is present, no repair actions should be taken. Please
consult your local company for additional handling instructions.
1.2 Flashing
Before any repair is made, a phone should be flashed to see if that fixes the problem. If the first
attempt at flashing a phone is unsuccessful, check whether the system connector is dirty or
oxidized, clean it if necessary, and try reflashing the phone. If the second attempt at flashing is
not successful, handle the unit according to your local company directives.
1.3 Unrepairable at the SP/Mechanical Level
If the Mechanical Troubleshooting Guide is exhausted and the cause of the failure was not
determined or the failure cannot be repaired at this level, handle the unit according to your local
company directives.
4/000 21-1/FEA 209 544/574 B 2(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
2 Appearance Problems
Troubleshooting Steps
1. Check for cosmetic damage on the external surfaces
of the phone. Make sure that the various external
seams between the front cover, back frame, antenna
cover, and battery cover fit together correctly.
Replace any faulty component, if necessary.
2. Check the keypad for marks. Replace the keypad if
necessary.
4/000 21-1/FEA 209 544/574 B 3(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
3 Network Problems
Troubleshooting Steps
1. If a network problem exists, check whether the SIM
cardholder is damaged, dirty, or oxidized. Clean it if
necessary.
2. Check whether the antenna connector on the PCB is
damaged, dirty, or oxidized. Clean it if necessary.
3. Check that the antenna contact pads on the antenna
assembly are not damaged, dirty, or oxidized. Clean
the contact pads or replace the antenna assembly as
necessary.
4/000 21-1/FEA 209 544/574 B 4(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
4 On/Off Problems
Troubleshooting Steps
NOTE! If the phone does not appear to power up,
check whether the keypad is illuminated. If
the keypad is illuminated, refer to Section 6,
Display/Illumination Problems.
1. If the LCD and keypad are not illuminated, check
that the contact pads on the battery are not damaged,
dirty, or oxidized. Clean the contact pads or replace
the battery as necessary.
2. Also, check whether the phone's battery connector is
damaged, dirty, or oxidized. Clean the battery
connector if necessary.
3. If an issue with the "NO" button is suspected to be
the problem, check whether the keypad PCB-to-main
PCB connector or the contact pads on the keypad
PCB assembly are damaged, dirty, or oxidized.
Clean them if necessary.
4. If the phone still will not power on, replace the
keypad PCB assembly.
4/000 21-1/FEA 209 544/574 B 5(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
5 Audio Problems
Troubleshooting Steps
1. If an audio problem is determined to be with the
receiver, check that the receiver's external port is not
clogged. Clean the port if necessary.
2. Check that the receiver's board connections are not
dirty or oxidized. Clean them if necessary.
3. Also, check whether the receiver or the receiver
gasket is damaged or dirty. Clean or replace them as
necessary.
4. If an audio problem is determined to be with the
microphone, check that the microphone's external
port is not clogged. Clean the port if necessary.
5. Check that the microphone board connection is not
dirty or oxidized. Clean it if necessary.
4/000 21-1/FEA 209 544/574 B 6(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
Troubleshooting Steps
6. Also, check whether the microphone is damaged,
dirty, or oxidized. Replace it if necessary.
7. Replace the microphone grommet.
6 Keypad/Volume Keys/Navigation Button Problems
Troubleshooting Steps
1. If there is an issue with any of the keys on the
keypad including the navigation switch, disassemble
the phone and check whether keypad PCB-to-main
PCB connector and/or the contact pads on the
keypad PCB assembly are damaged, dirty, or
oxidized. Clean them if necessary.
2. If the problem persists, replace the keypad PCB
assembly.
3. If there is an issue with the volume keys,
disassemble the phone and visually inspect the side
volume button and side volume switch for damage,
dirt, or oxidation. Clean or replace the side volume
switch and/or the side volume button as necessary.
4/000 21-1/FEA 209 544/574 B 7(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
7 Display/Illumination Problems
Troubleshooting Steps
NOTE! If neither the keypad nor the LCD
illuminate, there may be a power problem.
Refer to Section 4, On/Off Problems.
1. If the LCD does not illuminate, disassemble the
phone and check whether the LCD ZIF connector is
damaged, dirty, oxidized, or improperly closed.
Clean and/or adjust how the ZIF connector is closed
as necessary.
2. Also, check whether the LCD's flex film connection
is damaged, dirty, or oxidized. Clean the connection
or replace the LCD as necessary.
3. If the LCD still is not lighting up properly and has
not been replaced, replace it.
NOTE! When replacing the LCD, the contrast
should be checked.
4. If the LCD illuminates, but the keypad does not,
disassemble the phone and check whether the keypad
PCB-to-main PCB connector and/or the contact pads
on the keypad PCB assembly are damaged, dirty, or
oxidized. Clean them if necessary.
5. If the LEDs on the keypad PCB assembly still are
not lighting up properly, replace the keypad PCB
assembly.
4/000 21-1/FEA 209 544/574 B 8(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
8 Capacity/Charging Problems
Troubleshooting Steps
1. If the phone will not charge, check whether the
contact pads on the battery are damaged, dirty, or
oxidized. Clean the battery's contact pads or replace
the battery as necessary.
2. Also, check whether the phone's battery connector is
damaged, dirty, or oxidized. Clean the battery
connector if necessary.
3. Check whether the system connector is dirty or
oxidized. Clean it if necessary.
4/000 21-1/FEA 209 544/574 B 9(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
9 Alert Problems
Troubleshooting Steps
1. If the phone will not vibrate, disassemble the phone
and check whether the vibrator contact pads on the
PCB are damaged, dirty, or oxidized. Clean the pads
if necessary.
2. Also, check whether the contacts on the vibrator are
damaged, dirty, or oxidized. Replace the vibrator if
necessary.
3. If the polyphonic speaker cannot be heard, check that
the speaker's external port is not clogged. Clean the
port if necessary.
4. Check whether the contacts on the polyphonic
speaker are damaged, dirty, or oxidized. Clean the
contacts or replace the speaker as necessary.
5. Also, check whether the polyphonic speaker contacts
on the PCB are damaged, dirty, or oxidized. Clean
them if necessary.
4/000 21-1/FEA 209 544/574 B 10(11)
Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mech
10 SIM Problems
Troubleshooting Steps
4. Check whether the SIM cardholder is damaged,
dirty, or oxidized. Clean it if necessary.
11 Revision History
Rev. Date Changes / Comments
PA1 2003-05-19 First Draft
A 2003-08-04 Initial Release
B 2003-09-18