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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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7-27
7-13. GSM Transmitter
R110, C126, C129
>=2.7V
OK?
Yes
Resolder U100
Check U200
END
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Check +VBAT or PAM
control signal
Resolder or Change U101
Check U101
pin 5, OK?
Yes
U100 pin
H8,J8,H7,J7
>= 1V
Resolder R106, R107,
R108, R109
Resolder C113, C107, C112
Check ANT Switch
control circuit
Change or Resolder
MODULE1
U101 pin7
<= -11dBm
U101
pin7
<= -15dBm
U101 pin8
>= 18dBm
MODULE1 pin11
>= 18dBm
Check MODULE1
pin10 = H (2.68V),
pin9,12 = L
TX ON (5Level)
Resolder CN100, C102
MODULE1 Pin8
>= 20dBm