Service manual

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Flow Chart of Troubleshooting
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10-18
10-2-3. PCS RX
Continuous RX ON
RF Input : 660 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
F100 Check
Pin #6
≥
-65dBm ?
F100 Check
Pin #11
≥
-65dBm ?
U106 Check
Pin#1
≥
-65dBm ?
Check soldered status of
R101, C102, L104
C101, CN101
Resolder or Change
F100 Resolder or Change
U106 Check
Pin#15,16,23,27,31
=Clean 2.8V?
U106 Check
Pin#28,29,30,54=100mV?
C110, 111, 118, 121, U302
Check or resolder
Check U302
NO
NO
YES
YES
YES
YES
NO
YES
U106 Check
Pin #17 : 13MHz ?
Vpp : 1.1V?
R104 = 13MHz ?
Vpp : 1.2V?
R102 = 1.5V ?
U106
Change or resolder
NO
NO
NO
C105, R104
resolder
OSC101
Change or resolder
YES
YES
YES
NO
Check soldered status of
L106, C125
NO