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SAMSUNG Proprietary-Contents may change without notice
5-12
SGH-Q105 Flow Chart of Troubleshooting and Circuit Diagram
5-12. GSM Transmitter
Y
Y
Y
Change CN301
GSM TX 5pcl
N
U1006
9 pin : 33 dBm?
N
Change U1005
Change U1004
N
Y
U1006
2, 8 pin:High?
4, 10 pin:Low?
U1005
2 pin:High?
N
N
U1004 2pin:Low?
U703 5pin:Low?
3pin:Low?
N
Y
Change
U1006
OSC903
3 pin:0.8 V~2.5 V?
N
Y
Change
OSC903
U901
17, 18, 19, 20 pin
like left?
N
Y
Change
Resister
R701, R702, R711,
R712 like left?
Change U1004
Change
U703
Y
Y
N
U1004
3pin:Low?
Change U1008
1.7 V
0.8 V
1.25 V