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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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7-25
13. GSM Transmitter
MODULE1 Pin8
>= 20dBm
Resolder CN100, C102
TX ON (5Level)
Check MODULE1
pin10 = H (2.68V),
pin9,12 = L
MODULE1 pin11
>= 18dBm
U101 pin8
>= 18dBm
U101 pin7
<= -15dBm
U101 pin7
<= -11dBm
Change or Resolder
MODULE1
Check ANT Switch
control circuit
Resolder C113, C107, C112
Resolder R106, R107,
R108, R109
U100 pin
H8,J8,H7,J7
>= 1V
Yes
Check U101
pin 5, OK?
Resolder or Change U101
Check +VBAT or PAM
control signal
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
END
Check U200
Resolder U100
Yes
R110, C126, C129
>=2.7V
OK?