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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-19
9-13. GSM850 Receiver
RX ON
Cell Power : -60dBm
①
Yes
U100 Pin17
≥
-
65dBm
No
Resolder U100, L105, C116
Yes
Check ANT Switch
control circuit
U100 VC1, VC2
≥
-68dBm
Check U100
pin10,pin16 = L
No
No
②
Resolder U100
Yes
③
U100
pin 13
≥
-70dBm
pin 5,6
≥
-70dBm
Yes
No
Resolder L119, L123, L120,
C126
Check UCP200
END