Samsung GT-i8910 Service Manual page 81

Flow Chart of Troubleshooting
9-2-4. Abnormal WCDMA2100 Tx Operation
TX ON
PWR=23dBm
Target
1. Check
FEM Ant
F100 PIN20
≥ 10dBm
2. Check
FEM In/Out
F100 PIN18
≥ 8dBm
3. Check
Duplexer Ant
DUF102 PIN2
≥ 5dBm
4 .Check
Coupler Input
CPL102 PIN2
≥ 5dBm
5. Check
PAM Output
PAM101 PIN8
≥ -15dBm
6. Check
Transceiver Input
RFT100 PIN59
≥ -20dBm
Check RFT100,
UCP300
END
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Resolder RFS100,
L103, C101
Check F100
PIN12=H
YES
Resolder
L129, L128
Resolder or change
CPL102, R118, R112,
R114, R115
Resolder or Change
C194, C118, L140, C142
Resolder or Change
PAM101, F104, C152,
C148, C113
9-44
Check Antenna
Switch Control
NO
Resolder or Change
F100