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SAMSUNG Proprietary-Contents may change without notice
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Flow Chart of Troubleshooting
9-20
9-12. GSM Receiver
RX ON
RF input : 62CH center freq : 942MHz
Amp : -50dBm
Yes
DUF200 Pin8
>= -65dBm
No
Resolder RFS200,C203,L201
Yes
Check ANT Switch
control circuit
DUF200 5,6
>= -68dBm
Check DUF200
pin10,pin12 = L
No
No
Yes
Yes
Resolder DUF200
No
Resolder L101, L102, L103
U101
pin 29 >= -70dBm
pin 30 >= -70dBm
Yes
No
U101 pin
10,15>=2.8V
U101 pin 6,7,8,9
>= 1V
No
Check & Resolder
U101, OSC100
RF26MHz, RF PSU Part
Yes
Yes
Resolder U101
Check U500
END