Samsung GT-i8910 Service Manual page 91
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Also See for GT-i8910:
- Quick start manual (47 pages) ,
- User manual (78 pages) ,
- User manual (112 pages)
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Flow Chart of Troubleshooting
9-2-7. Abnormal WCDMA2100 Rx Operation
RX ON
AMP = -50dBm
1. Check
FEM Ant
F100 PIN20
≥ -65dBm
2. Check
FEM output
F100 PIN18
≥ -70dBm
3. Check
Duplexer Input
DUF102 PIN2
≥ -75dBm
4. Check
Transceiver Input
RFT100 PIN36
≥ -75dBm
5. Check
Transceiver Output
RFT PIN34
≥ -75dBm
Check RFT100,
UCP300
END
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
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Resolder RFS100,
L103, C101
PIN12=H
YES
Resolder DUF101,
L129, L128
Resolder or change
C199, C119, L131
Resolder or Change
F102, C167, L120, L119, L122
9-54
Check Antenna
Switch Control
NO
Resolder or Change
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