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SGH-E700 Flow Chart of Troubleshooting
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7-
18
13. GSM Transmitter
F101 Pin8
>= 20dBm
Resolder RFS100, C100
TX ON (5Level)
Check F101
pin11 = H (2.68V),
pin2 = L
F101 pin5
>= 20dBm
PAM100 pin9
>= 20dBm
VCO101 pin1
>= -8dBm
PAM100 pin7
>= -11dBm
Change or Resolder F101
Check ANT Switch
control circuit
Resolder L105, C114
Resolder R107, R108, R109
U100 pin5, 6, 7, 8
>= 500mV
Yes
Check PAM100
+VBATT, pin4, 7
OK?
Resolder or Change PAM100
Check +VBATT or PAM
control signal
Check U100
pin 26>=-20dB
& pin11>=2V
OK?
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
Check UCP200
Check U100 pin
2,12,4,23>=2.7V
OK?
Resolder U100
Yes