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Flow Chart of Troubleshooting
7-26
7-16. PCS Receiver
+
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
U100 Pin8
>= -65dBm
No
Resolder RFS100, C102,C103
Yes
Check ANT Switch
control circuit
U100 pin3,4
>= -68dBm
Check U100
pin10,pin12 = L
No
No
Yes
Yes
Resolder U100
No
Resolder C112, C118, C115
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, R102, R103
RF26MHz, RF PSU Part
Yes
Yes
Resolder U102
Check U200
END