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