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Flow Chart of Troubleshooting
7-13. DCS Receiver
RX ON
RF input : CH center freq
Amp : -50dBm
Yes
U100 Pin7
>= -65dBm
Yes
U100 pin1
>= -65dBm
Yes
F102 pin1
>= -70dBm
Yes
U101Pin38>=-70dBm
Pin39>=-70dBm
Yes
U101 pin6, 7, 8, 9
>= 1V
Yes
R130,R131,R132
,R133 >= 1V
Yes
Check U202
END
No
Resolder CN101, C102
No
No
Resolder F102, C104, L111
No
Resolder L105, L106, L108
No
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Check U100
pin2=L,pin4=L,pin8=L
Check U101
pin22,28 >= 2.7V
pin4 >= 4.0V
7-26
No
Check ANT Switch
control circuit
Yes
Resolder U100
No
Check & Resolder
RF PSU Part
Yes
Check & Resolder
U101, RF26MHz part
R104, R105
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