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Flow Chart of Troubleshooting
7-30
7-16. PCS Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
MODULE1 Pin7
>= -65dBm
No
Resolder CN100, C102
Yes
U100 pin5, 6
>= -68dBm
Check MODULE1
pin9 =
H,pin10,pin12 = L
No
No
Check ANT Switch
control circuit
Yes
Yes
Resolder MODULE1
U100
pin A1 >= -70dBm
pin B1 >= -70dBm
No
Resolder C119, L107, L108, C118
Yes
R110, C126, C129
>=2.7V
U100 pin
H8,J8,H7,J7
>= 1V
No
No
Check & Resolder
U100, R113
RF26MHz, RF PSU Part
Yes
Yes
Resolder U100
Check U200
END