Pcs Receiver - Samsung SGH-P200 Service Manual

Flow Chart of Troubleshooting

9-16. PCS Receiver

RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
DUF100 Pin8
>= -65dBm
Yes
DUF100 pin3,4
>= -65dBm
Yes
U102
pin32 >= -70dBm
pin33 >= -70dBm
Yes
U102 pin7,8,9,10
>= 1V
Yes
Check UCP200
END
No
Resolder RFS101, C101, L104
No
No
Resolder L107, C110, C111
No
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Check DUF100
pin10,pin12 = L
pin9 = H (2.68V)
Yes
Check U102
pin 23,26,31
>= 2.7V
Yes
9-32
No
Check ANT Switch
control circuit
Resolder DUF100
No
Check & Resolder
U102, R109
RF26MHz, RF PSU Part
Resolder U102