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Flow Chart of Troubleshooting
7-15. PCS Receiver
RX ON
RF input : CH center freq
Amp : -50dBm
Yes
U100 Pin7
>= -65dBm
Yes
U100 Pin3
>= -65dBm
Yes
F100 Pin1
>= -70dBm
Yes
U101 Pin35,36
>= -70dBm
Yes
U101 Pin 6,7,8,9
>= 1V
Yes
R130,R131,R132,
R133 >= 1V
Yes
Check U202
END
No
Resolder CN101, C102
No
No
Resolder F100, C103, L104
No
Resolder L101, L102, L103
No
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Check U100
pin2=H,pin4=L,pin8=L
Check U101
pin4 >= 4.0V
pin22, 28 >= 2.7V
7-30
No
Change
or Resolder U100
Yes
Check ANT Switch
control circuit
Check & Resolder
RF PSU part
Check & Resolder
U101, RF 26MHz part,
R104, R105
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