Samsung SGH-E100 Service Manual page 40

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