SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-22
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9-14. GSM850/900 Transmitter
①
②
④
Check VBAT or PAM
control signal
No
Change or Resolder
FEM101
Yes
FEM101 Pin17≥
-65dBm
TX ON (5Level)
Check FEM101
pin10 = H (2.6V),
Pin16 = L
FEM101 pin13
≥ -30dBm
PAM101 pin5
≥ -4dBm
Check ANT Switch
control circuit
Yes
Check PAM101 pin
1,2,3,20, VBAT OK?
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Resolder FEM101, L106, C104
PAM101 pin13
≥ -30dBm
③
No
Resolder or Change C105,
C106, C109
Resolder or Change
PAM101
Check UCP201
END
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