Level 3 Repair
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8-33
8-3-14. GSM1800 RX
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm
Check C103
≤
-65dBm ?
Yes
No
END
Check L108
≤
-65dBm ?
Check soldered or change
C100, C101, F106, C174,
RFS100, L100, L129, C109
Check soldered or change
U100, L102, L108
Yes
No
Check L104
≤
-65dBm ?
Yes
No
Check component
soldering status OK at
U104
Check soldered or change
F100, L103, C112, L105, L109, L104
Check soldered or change U104
Yes
No
GSM1800 Rx is OK?
Check soldered or change UCP300
Yes
No
NORMAL CONDITION
catch the channel?