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Flow Chart of Troubleshooting
9-28
9-19. PCS Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
MOD100 Pin10
>= -65dBm
No
Resolder RFS100,C100,L102
Yes
No
Check ANT Switch
control circuit
Check MOD100
pin13,14 = L
MOD100 pin7,8
>= -68dBm
No
Yes
Yes
Resolder MOD100
No
Resolder L107, L108, L109
U102
pin 22 >= -70dBm
pin 23 >= -70dBm
Yes
No
Check U102
pin 5, 15, 17, 20, 31,
38 >=2.8V
U102 pin 1,2,3,4
>= 1V
No
Check & Resolder
U102, C117
RF26MHz, RF PSU Part
Yes
Yes
Resolder U102
Check UCP200
END