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5-14
SGH-Q100 Flow Chart of Troubleshooting and Circuit Diagram
5-14. DCS Transmitter
Y
Y
Y
Change CN301
DCS TX
N
U1006
9 pin : 30 dBm?
N
Change U1005
Change U1004
N
Y
U1006
2, 8 pin:Low?
4, 10 pin:High?
U1005
2 pin:High?
N
N
U1004
2pin:High?
U703 5pin:High?
3pin:LHigh?
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
R701, R702,
R710, R711
U702
1, 7, 8, 14 pin
like left?
N
Y
Change
U702
U704
4, 5, 13, 14 pin
like left?
Y
Change
U704
U704
2, 6, 11, 15 pin
like left?
N
Y
Change
Resister
R718, R719, R722,
R723 like left?
N
Change U1004
Change
U703
Y
Y
N
U1004
3pin:Low?
Change U1008
1.75 V
0.75 V
1.25 V
1.75 V
0.75 V
1.25 V
2.0 V
1.5 V
1.75 V
2.0 V
1.5 V
1.75 V