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Flow Chart of Troubleshooting
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9-19
9-12. GSM Receiver
RX ON
Cell Power : -60dBm
PAM100 Pin 20
≥
-65dBm
Yes
Resolder L101, L110, L111, C105, C118
No
Yes
No
Check PAM100
pin
8
=
H, pin6=L,
pin 3=L
PAM100 Pin 12
≥
-68dBm
Check ANT Switch
control circuit
No
Yes
Resolder PAM100
Yes
UCP200
pin G1
≥
-70dBm
pin F1
≥
-70dBm
Resolder C127, C128, C129, L109
No
Yes
Check UCP200
END