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9-13. GSM Transmitter
TX ON (5Level)
Yes
F100 Pin8
>= 20dBm
Yes
F100 pin11
>= 18dBm
Yes
PAM100 pin16
>= 18dBm
Yes
PAM100 pin12
<= -11dBm
Yes
PAM100 pin 38<=
-15dB
Yes
U101 pin 7,8,9,10
>= 1V
Yes
Check UCP201
END
No
Resolder RFS100,C101
No
No
Resolder or Change PAM100
No
No
Resolder R110,R111,R112
No
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Check F100
pin10 = H (2.6V),
12 = L
Yes
No
Check F101, OK?
Yes
No
U101 pin 23,26,31
>=2.8V
Yes
9-21
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder
L107,C125,C124
Resolder or Change F101
Check +VBAT or PAM
control signal
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Resolder U101
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