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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-35
9-12. GSM850 Transmitter
TX ON (5Level)
Check & Resolder
CP PMIC(U401)t
Yes
No
Resolder U101
Check all voltage
sources of U101
Is it OK?
Resolder or Change PAM100
Yes
F100 Pin2
>= 20dBm
Resolder RFS100,C110
Check F100
pin3 = H, pin4 = L
,pin5 = L, pin6 = L
F100 pin11
>= 20 dBm
PAM100 pin9
>= 20 dBm
1.5dBm >=
PAM100 pin8
> = 5.5dBm
Change or Resolder
F100
Check ANT Switch
control circuit
Resolder L106,C119,L126
or Change PAM100
U101 pin 1,3,23
>= 1V
Yes
Check PAM100
and VBAT(pin4) OK?
Check VBAT or PAM
control signal
Yes
Yes
Yes
Yes
No
Yes
No
No
No
No
No
No
END
Check UCP300
Yes