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Flow Chart of Troubleshooting
7-17. PCS Receiver
RX ON
RF input : CH center freq
Amp : -50dBm
Yes
U201 Pin1
>= -65dBm
Yes
U201 Pin10,11
>= -65dBm
Yes
U100 Pin35,36
>= -70dBm
Yes
U100 Pin 6,7,8,9
>= 1V
R110,R113,R114,
R115 >= 1V
Yes
Check U300
END
No
Resolder CN201, C209
No
No
Resolder L101, L103, L102
No
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Check U201
pin3=L,pin5=L,pin2=H
Check U100
pin4 >= 4.0V
pin22, 28 >= 2.7V
7-26
No
Change
or Resolder U201
Yes
Check ANT Switch
control circuit
Check & Resolder
RF PMU part
Check & Resolder
U100, RF 26MHz part,
R100, R101
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