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Flow Chart of Troubleshooting
3-17
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PAM400
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 ?
U400
pin 17 : 2.8V ?
PAM400 CHECK
pin20
≥
-65dBm ?
U400
CHECK
pin27,28
≥
-65dBm ?
PAM400,RFS400
resolder or change
PAM100
resolder or change
C405,C407,L406
resolder or change
UCP100 pinA13, C114
change or resolder
U400 CHECK
pin 19,20 :
26MHz ?
Vp-p : 380mV?
OSC400
change or resolder
U400
resolder or change
UCP100
CHECK!!
U400 pin 2,3,22,23
Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
F400 CHECK
pin3,4
≥
-65dBm ?
F400
resolder or change
YES
NO