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7-13. GSM Transmitter
TX ON (5Level)
Yes
MODULE1 Pin8
> = 20dBm
Yes
MODULE1 pin11
> = 18dBm
Yes
U101 pin8
> = 18dBm
Yes
U101 pin7
< = -11dBm
Yes
U101 pin7
< = -15dBm
Yes
U100 pin
H8,J8,H7,J7
> = 1V
Yes
Check U200
END
No
Resolder CN100, C102
No
No
Resolder C113, C107, C112
No
No
Resolder R106, R107,
No
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Check MODULE1
pin10 = H (2.68V),
pin9,12 = L
Yes
No
Check U101
pin 5, OK?
Yes
R108, R109
R110, C126, C129
No
> = 2 .7V
OK?
Yes
7-27
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder
MODULE1
Resolder or Change U101
Check +VBAT or PAM
control signal
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Resolder U100
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