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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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7-29
7-14. GSM Transmitter
Module1 Pin8
>= 20dBm
Resolder CON1, C103
TX ON (5Level)
Check Module1
pin10 = H (2.68V),
pin9, pin12 = L
Module1 pin11
>= 18dBm
U101 pin8
>= 18dBm
U101 7pin
>= -11dBm
Change or Resolder
Module1
Check ANT Switch
control circuit
Resolder R122, C104, C107
Yes
Check U101
+VBAT, pin4, pin6
OK?
Resolder or Change U101
Check +VBAT or U101
control signal
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
No
Check & Resolder
U100, U709
RF26MHz, RF PSU Part
Check U100
J2,A6,B6,A9,E9
>=2.7V
U100 H7,H8,J7,J8
>= 1V
Yes
Yes
Resolder U100
Check U200
END