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Flow Chart of Troubleshooting
7-34
7-21. PCS Receiver
+
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
F101 Pin8
>= -65dBm
No
Resolder RFS100,C103,L141
Yes
Check ANT Switch
control circuit
F101 pin2,3
>= -68dBm
Check F101
pin13 = H
pin9,pin12 = L
No
No
Yes
Yes
Resolder F101
No
Resolder C112, C118, L137
U102
pin 32 >= -70dBm
pin 33 >= -70dBm
Yes
No
Check U102
pin 23,26,31 >=2.7V
U102 pin 7.8.9.10
>= 1V
No
Check & Resolder
U102, R129
RF26MHz, RF PSU Part
Yes
Yes
Resolder U102
Check UCP200
END