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SGH-E100 Flow Chart of Troubleshooting
7-
18
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12. GSM Transmitter
MODULE1 pin5
>= 20dBm
Resolder CON201, C210
TX ON (5Level)
Check MODULE1
pin8 = H (2.68V),
pin4 = L
MODULE1 pin5
>= 20dBm
U201 pin9
>= 20dBm
U102 pin1
>= -8dBm
U201 pin7
>= -11dBm
Change or Resolder
MODULE1
Check ANT Switch
control circuit
Resolder C220
Resolder R201, R202, R203
U100 pin6, 7, 8, 9
>= 500mV
Yes
Check U201
+VBATT, pin4, 7
OK?
Resolder or Change U201
Check +VBATT or PAM
control signal
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
END
Check U504
Yes
Check & Resolder RFLO
signal, RF26MHz,
RF PSU Part
Check U100 pin 10,
22,23>=2.7V
OK?
Resolder U100