Pcs Transmitter - Samsung SGH-Q105 Service Manual

SGH-Q105 Flow Chart of Troubleshooting and Circuit Diagram

5-14. PCS Transmitter

DCS TX 0pcl
N
U1006
9 pin : 30 dBm?
N
U1006
2, 8 pin:Low?
4, 10 pin:High?
Y
OSC903
3 pin:0.8 V~2.5 V?
N
1.65 V
1.2 V
17, 18, 19, 20 pin
like left?
0.75 V
R701, R702, R711,
R712 like left?
Change CN301
Y
N
Change
Y
U1006
U901
Change
Y
OSC903
Y
Change
Y
Resister
SAMSUNG Proprietary-Contents may change without notice
U1005
N
2 pin:High?
Y
U1004
N
2pin:High?
Y
U1004
N
3pin:High?
Y
Change U1008
5-14
Change U1005
Change
U703 5pin:High?
N
3pin:High?
Y
Change U1004
Change U1004
U703