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Flow Chart of Troubleshooting
9-14
9-2-3. PCS Rx
Normal condition
catch the channel ?
Check U101
pin 12
≥
-65
dbm ?
Check U100
pin 17,18
≥
-
65dBm ?
Yes
No
No
Check U101
pin 20
≥
-65 dbm
?
Yes
No
Yes
Check ANT,
L101, C110, C108, L105
Resolder or change
RFS101, C112,L102,L103,L104
Resolder or change
U101
Resolder or change
F103,C116,C119,L107
Resolder or change
U201
CONTINOUS RX ON
RF INPUT : 660CH
AMP : -50dbm
Check U100
pin 13 = 2.9V
Yes
Resolder or change
UCP301
Yes
No
No
1
2
3
4
5