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Troubleshooting Guide
- electrical -
S312
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Guide (elect)
CONTENTS
1 Troubleshooting Flow .................................................................... 3
1.1 Display ................................................................................................... 3
1.2 Illumination ........................................................................................... 4
1.3 Keys & Sensors .................................................................................... 5
1.4 Alert & RTC ........................................................................................... 6
1.5 Audio ..................................................................................................... 7
1.6 On/Off .................................................................................................... 8
1.7 Charging & Capacity ............................................................................ 9
1.8 Data Communication .......................................................................... 10
1.9 Network & Signal ................................................................................ 11
2 Revision History ........................................................................... 12
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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1 Troubleshooting Flow
1.1 Display
Symptom:
Replace:
Display problem
J301, if damaged
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1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.2 Illumination
Symptom:
Replace:
Symptom:
Replace:
Symptom:
Replace:
No Display illumination
J301, if damaged
D302 or D301, if short circuit
No Navigation keys illumination
J601, if damaged
D605, if short circuit
No TORCH LIGHT
LED301, if damaged
D304 or D303, if short circuit
Troubleshooting Guide (elect)
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.3 Keys
Symptom:
Replace:
Keyboard problems
J601, if damaged
D607, D608, D610, D611, D612, D613, D614, D615, D618, if short circuit
Troubleshooting Guide (elect)
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.4 Alert & RTC
Symptom:
Replace:
Symptom:
Replace:
Vibrator problems
D508, if short circuit
The clock gain or lose time
X102
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1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.5 Audio
Symptom:
Replace:
Symptom:
Replace:
Symptom:
Replace:
Symptom:
Replace:
Symptom:
Replace:
No Microphone
J501, if damaged
D505, if short circuit
No Earphone
D506, D507, if short circuit
No or bad Loudspeaker
D503, D504, if short circuit
U501, if damaged
Can not detect Hands-free (PHF)
D709, if short circuit
No FM Radio
U803, if damaged
D702, if short circuit
Troubleshooting Guide (elect)
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.6 On/Off
Symptom:
Replace:
Symptom:
Replace:
Using no current when On/Off key is pressed and will not start.
J401, if damaged
J601
D601, if short circuit
U904, if damaged
Current draw greater than 300 mA
D403, if short circuit
Troubleshooting Guide (elect)
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.7 Charging & Capacity
Symptom:
Replace:
Symptom:
Replace:
Symptom:
Replace:
No Charging from power outlet
J401, if damaged
D403 or D708, if short circuit
D402 or D405,
U401, if damaged
No Charging from computer via USB
J401, if damaged
D701, if short circuit
D403 or D701, if short circuit
D401 or D405,
U402, if damaged
Capacity problem
D404, if short circuit
Troubleshooting Guide (elect)
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.8 Data Communication
Symptom:
Replace:
No communication via the System Connector
D706, D707 or D701, if short circuit
U703, if damaged
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1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Troubleshooting Flow
1.9 Network & Signal
Symptom:
Replace:
No network or Poor Signal
J905 or J906, if damaged
J904
U904
Troubleshooting Guide (elect)
1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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Page 12
Revision History
Rev. Date Changes / Comments
1 2009-Jun-14 Initial release
2 2009-Jul-25 Due to system failure. No changes.
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1222-7451 Rev 2
© Sony Ericsson Mobile Communications AB – Company Internal
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