Flow Chart of Troubleshooting
9-9. GSM850 Receiver
RX ON
Cell Power : -60dBm
Yes
PAM100 Pin15 ≥
-65dBm
Yes
PAM100 Pin18
≥ -68dBm
Yes
F101
Pin 8 ≥ -70dBm
Pin 9 ≥ -70dBm
Yes
Resolder L113, L115, L116, L117
Check UCP200
END
①
No
Resolder PAM100, C152, C151,
L109, L114, C117
No
③
No
Resolder F101, L119, C119
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Check PAM100 Pin9,
Pin10 = L
Yes
9-16
No
Check ANT Switch
control circuit
②
Resolder PAM100