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Flow Chart of Troubleshooting
9-16
9-10. GSM Receiver
RX ON
Cell Power : -60dBm
U100 Pin17
≥
-65dBm
①
Yes
Resolder U100, L105, C116
No
Yes
No
Check MODULE100
pin10,pin16 = L
U100 VC1, VC2
≥
-68dBm
Check ANT Switch
control circuit
No
②
Yes
Resolder U100
Yes
③
U100
pin 13
≥
-70dBm
pin 5,6
≥
-70dBm
Resolder L114, L116, L118
No
Yes
Check UCP200
END