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Flow Chart of Troubleshooting
9-28
9-12. GSM Receiver
DUF100 Pin8
>= -65dBm
Resolder
RFS101, C101, L104
END
No
Yes
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Check DUF100
pin9,pin10,pin12 = L
DUF100 pin 5,6
>= -65dBm
U102 pin 7, 8, 9,
10
>= 1V
U102
pin 30 >= -70dBm
pin 29 >= -70dBm
Check ANT Switch
control circuit
Resolder DUF100
Resolder L106, C103, C108
Check U102
pin 23, 26, 31
>= 2.7V
Check & Resolder
U102, R109,
RF26MHz, RF PSU Part
Resolder U102
R122, R123, R124,
R125 >= 1V
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Check UCP200
Summary of Contents for SGH-P200
Page 30: ...8 PCB Diagrams 8 1 Top ...
Page 31: ...PCB Diagrams 8 2 Bottom ...