Gsm Receiver - Samsung SGH-T329 Service Manual

Flow Chart of Troubleshooting

9-12. GSM Receiver

RX ON
RF input : 191CH center freq : 836.8MHz
Amp : -50dBm
Yes
F100 Pin13
>= -65dBm
Yes
F100 pin1,2
>= -68dBm
Yes
U101
pin 23 >= -70dBm
pin 24 >= -70dBm
Yes
U101 pin 4,5,6,7
>= 1V
Yes
Check UCP200
END
No
Resolder RFS100, C101, L102
No
No
Resolder C111, C113, L108
No
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Check F100
pin9,pin11 = L
Yes
U101 pin
12,13,28,29 >=2.8V
Yes
9-20
No
Check ANT Switch
control circuit
Resolder F100
No
Check
U101, OSC100
RF26MHz, RF PSU Part
Resolder U101