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9-2-2. DCS RX
Continuous RX ON
RF Input : 698 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
U100 Check
Pin #6 ≥ -65dBm ?
YES
U100 Check
Pin #10,11 ≥ -65dBm ?
YES
U101 Check
Pin#8, 9 ≥ -65dBm ?
YES
U101 Check
Pin#1,13,22,32
≥ 3.1V?
YES
U101 Check
R117 : 13MHz
YES
U101 Check
Pin 35,36,37,38:
Vp-p 100mV
YES
GSM Receiver is ok?
YES
END
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NO
Check soldered status of
C100, C101, L102, C102
NO
RFS100, C100, L101
Resolder or Change
NO
U100 Resolder or Change
NO
Check soldered status of
L108, L109
NO
BTC500 PIN 3, C526
Check or resolder
NO
R117
Check or resolder
NO
U101
Resolder or Change
NO
GSM RX path component
resolder or change
9-19
Flow Chart of Troubleshooting
TCX100 CHECK
NO
pin 4 : 2.9V
PIN 3 : 13MHz
V p-p : 800mV
NO
TCX100
change
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