User Guide

Flow Chart of Troubleshooting
3-14
3-2-2. DCS Rx
Normal condition
catch the channel ?
Check PAM400
pin 12
≥
-65
dbm ?
Check U400
pin 19,20
≥
-
65dBm ?
Yes
No
No
Check PAM400
pin 18
≥
-65 dbm
?
Yes
No
Yes
Check ANT, C303, R300
Resolder or change
RFS400, L300, L301, L303, C305, C302
Resolder or change
PAM400
Resolder or change
F400, C310, C312, L304
Resolder or change
UCP201
CONTINOUS RX ON
RF INPUT : 698CH
AMP : -50dbm
Check U400
pin 13 = 2.9V
Yes
Resolder or change
UCP101
Yes
No
No
1
2
3
4
5