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Flow Chart of Troubleshooting
7-15. DCS Receiver
RX ON
RF input : CH center freq
Amp : -50dBm
Yes
U201 Pin1
>= -65dBm
Yes
U201 pin8,9
>= -65dBm
Yes
U100Pin38>=-70dBm
Pin39>=-70dBm
Yes
U100 pin6, 7, 8, 9
>= 1V
Yes
R110,R113,R114,
R115 >= 1V
Yes
Check U300
END
No
Resolder CN201, C209
No
No
Resolder C107, C108, L104
No
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Check U201
pin3=L,pin5=L,pin2=L
Check U100
pin22,28 >= 2.7V
pin4 >= 4.0V
7-24
No
Check ANT Switch
control circuit
Yes
Resolder U201
No
Check & Resolder
RF PMU Part
Yes
Check & Resolder
U100, RF26MHz part
R100, R101
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