Sony Ericsson S312 User manual

1222-7451 Rev 2
Troubleshooting Guide
- electrical -
S312
©Sony Ericsson Mobile Communications AB – Company Internal

Troubleshooting Guide (elect)
1222-7451 Rev 2
CONTENTS
1Troubleshooting 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
2Revision History...........................................................................12
©Sony Ericsson Mobile Communications AB – Company Internal 2(2)

Troubleshooting Guide (elect)
1222-7451 Rev 2
1 Troubleshooting Flow
1.1 Display
Symptom:
Replace: Display problem
J301, if damaged
©Sony Ericsson Mobile Communications AB – Company Internal 3(3)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.2 Illumination
Symptom:
Replace: No Display illumination
J301, if damaged
D302 or D301, if short circuit
Symptom:
Replace: No Navigation keys illumination
J601, if damaged
D605, if short circuit
Symptom:
Replace: No TORCH LIGHT
LED301, if damaged
D304 or D303,if short circuit
©Sony Ericsson Mobile Communications AB – Company Internal 4(4)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.3 Keys
Symptom:
Replace: Keyboard problems
J601, if damaged
D607, D608, D610, D611, D612, D613, D614, D615, D618, if short circuit
©Sony Ericsson Mobile Communications AB – Company Internal 5(5)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.4 Alert & RTC
Symptom:
Replace: Vibrator problems
D508, if short circuit
Symptom:
Replace: The clock gain or lose time X102
©Sony Ericsson Mobile Communications AB – Company Internal 6(6)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.5 Audio
Symptom:
Replace: No Microphone
J501, if damaged
D505, if short circuit
Symptom:
Replace: No Earphone
D506, D507, if short circuit
Symptom:
Replace: No or bad Loudspeaker
D503, D504, if short circuit
U501, if damaged
Symptom:
Replace: Can not detect Hands-free (PHF)
D709, if short circuit
Symptom:
Replace: No FM Radio
U803, if damaged
D702, if short circuit
©Sony Ericsson Mobile Communications AB – Company Internal 7(7)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.6 On/Off
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
Symptom:
Replace: Current draw greater than 300 mA
D403, if short circuit
©Sony Ericsson Mobile Communications AB – Company Internal 8(8)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.7 Charging & Capacity
Symptom:
Replace: No Charging from power outlet
J401, if damaged
D403 or D708, if short circuit
D402 or D405,
U401, if damaged
Symptom:
Replace: 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
Symptom:
Replace: Capacity problem
D404, if short circuit
©Sony Ericsson Mobile Communications AB – Company Internal 9(9)

Troubleshooting Guide (elect)
1222-7451 Rev 2
Troubleshooting Flow
1.8 Data Communication
Symptom:
Replace: No communication via the System Connector
D706, D707 or D701, if short circuit
U703, if damaged
©Sony Ericsson Mobile Communications AB – Company Internal 10(10)