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9-13. GSM Transmitter
TX ON (5Level)
Yes
F100 Pin13
>= 30dBm
Yes
F100 pin10
>= 30dBm
Yes
U103 pin12
>= 30dBm
Yes
U103 pin7
<= -4dBm
Yes
U106 pin 4,5,6,7
>= 0.2Vp-p
Yes
Check UCP200
END
No
Resolder CN101,C103,L102
No
No
Resolder or Change L101
No
Yes
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Check F100
pin11 = H (2.6V),
Pin9 = L
Yes
Yes
Check U103pin 2,3,
5,6,8+Vbatt
pin4,OK?
No
U106 pin 16,17,29,
No
32,36
>=2.8Vpin10>=1.8
Yes
9-21
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder F100
Resolder or Change U103
Check +VBAT or PAM
control signal
Check
U106,C117,C126,L123
Resolder U106
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