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Flow Chart of Troubleshooting
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10-21
10-10. GSM Receiver
Yes
CONTINUOUS RX on
RF input : 62CH
Cell power : -50dBm
RX ON
RF input : 62CH
Cell Power : -50 dBm
Yes
No
Resolder RFS100
C107
≥
-65dBm
L105 > 2.5V
R103 < 0.5V
R104 < 0.5V
R105 > 1.5V
Yes
Check UCP300
No
Yes
C108
≥
-68dBm
No
Resolder F101 or Change F101
Yes
No
Check UCP300
Check U202
U202 PIN
11,12,13,14
≥
500mV
END
Summary of Contents for SGH-L770V
Page 74: ...8 Block Diagrams 8 1 8 1 RF Block Diagram ...
Page 75: ...9 PCB Diagrams 9 1 1 Main top ...
Page 76: ...PCB Diagrams 9 2 2 Main bottom ...
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