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Flow Chart of Troubleshooting
3-16
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U100
CHECK
pin12
-65dBm ?
3-2-2. DCS RX
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm
YES
NORMAL CONDITION
catch the channel?
CHECK
ANT
contact ?
U101
pin 13 : 2.9V ?
U100 CHECK
pin18
-65dBm ?
U101
CHECK
pin19,20
-65dBm ?
U100,RFS101
resolder or change
U100
resolder or change
C13,C116,L108
resolder or change
UCP301 pinA13, C312
change or resolder
U101 CHECK
pin 30,31
freq :26MHz ?
Vp-p : 380mV?
OSC101
change or resolder
U101
resolder or change
UCP301
CHECK!!
U101 pin 4,5,6,7
Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
F101 CHECK
pin3,4
-65dBm ?
F101
resolder or change
YES
NO