Flow Chart of Troubleshooting
9-12
9-2-2. DCS Rx
Normal condition
catch the
channel ?
Check U100
pin 12
≥
-65
dbm ?
Check U101
pin 19,20
≥
-
65dBm ?
Yes
No
No
Check U100
pin 18
≥
-65
dbm ?
Yes
No
Yes
Check ANT,
R102, R105, R135
Resolder or change
RFS601, C110,L106,L103,L104
Resolder or change
U100
Resolder or change
F101,C111,C113,L108
Resolder or change
UCP201
CONTINOUS RX ON
RF INPUT : 698CH
AMP : -50dbm
Check U101
pin 13 = 2.9V
Yes
Resolder or change
UCP300
Yes
No
No
1
2
3
4
5