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Flow Chart of Troubleshooting
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9-23
9-14. DCS Receiver
RX ON
RF input : CH center freq
Amp : -50dBm
MODULE200 Pin8
>= -65dBm
MODULE200 Pin1,2
>= -65dBm
U100Pin38>=-70dBm
Pin39>=-70dBm
U100 pin6, 7, 8, 9
>= 1V
Yes
Yes
No
Resolder CN201, C209
No
Yes
No
Resolder
MODULE200
Check ANT Switch
control circuit
Check MODULE200
pin9=L,pin12=L
Yes
Yes
Resolder L107, L108, L104
No
Check U100
pin22,28 >= 2.7V
pin4 >= 4.0V
Check & Resolder
RF PSU Part
No
No
Check & Resolder
U100, RF26MHz part
R100, R101
Yes
Yes
R110,R113,R114,
R115 >= 1V
Yes
Check U300
END