Samsung SGH-T429 Service Manual - Page 58
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Flow Chart of Troubleshooting 9-16. PCS Receiver RX ON RF input : CH center freq : +67.7kHz Amp : -50dBm Yes F100 Pin7 No >= -65dBm Yes F100 Pin5 No >= -68dBm Yes No F100 pin5 >= -70dBm Yes No U101 Pin4,5,6,7 >= 1V Yes Check UCP200 Resolder CN100,C104 Check F100 No Pin9,Pin11 = L Yes Resolder C102, C103, L108 Check ANT Switch control circuit Resolder F100 U101 pin12,13,28,29 >=2.8V Yes No Check & Resolder U101, RF PSU Part Resolder U101 END 9-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
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SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-26
9-16. PCS Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
F100
Pin7
>= -65dBm
No
Resolder
CN100,C104
Yes
F100
Pin5
>= -68dBm
Check F100
Pin9,Pin11
=L
No
No
Check ANT Switch
control circuit
Yes
Yes
Resolder F100
F100 pin5
>= -70dBm
No
Resolder
C102, C103, L108
Yes
U101
pin12,13,28,29
>=2.8V
U101
Pin4,5,6,7
>= 1V
No
No
Check & Resolder
U101,
RF PSU
Part
Yes
Yes
Resolder U101
Check
UCP200
END