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10-2. RF
10-2-1. GSM Receiver
CONTINUOS RX ON
RF INPUT : 62CH
Cell power : -50dBm
NORMAL CONDITION
c atch the channel ?
U102 CHECK
pin6 ≥ -65dBm?
U102 CHECK
pin12,13 ≥ -
U100 CHECK
pin6,7 ≥ -65dBm?
the power source
of U100
U100 CHECK
Pin19,21 :13MHz
GSM Receiver is ok?
END
NO
YES
NO
resolder or change
YES
NO
resolder or change
YES
NO
L108, L109, C131
resolder or change
YES
NO
check battery contact
YES
NO
check TCX101 and
YES
NO
GSM RX path component
1
CHECK
C101
2
CON101
3
U102
4
5
6
change
resolder or change
10-18
Flow Chart of Troubleshooting
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