Gsm850 Transmitter - Samsung SGH-I907 Service Manual

Flow Chart of Troubleshooting

10-9. GSM850 Transmitter

(PCL 5 level)
PAM100 Pin 8
PAM100 Pin 23
U100 Pin 55
Check U100 & UCP200
TX ON
>= 5dBm
No
Yes
>= 5dBm
No
>= 5dBm
No
END
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Resolder RFS100, C103, R100
Yes
,L100 ,L101, C111
Check PAM100
Truth Table
Pin 1 : LOW
Pin 27 : HIGH
Pin 28 : LOW
YES
Resolder or change PAM100
Yes
Resolder or change PAM100, C116, R106
10-28
,R108, R109