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Flow Chart of Troubleshooting
9-13. GSM Transmitter
TX ON (5Level)
Yes
F100 Pin13
≥ 30dBm
No
F100 pin10
≥ 30dBm
No
pam100 pin12
≥ 30dBm
No
pam100 pin7
≥ -4dBm
No
U102 pin 4,5,6,7
≥ 0.2Vp_p
No
Check UCP200
END
Yes
Resolder RFS100,C102,L102
Yes
Yes
Resolder or Change L106,
Yes
Yes
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Check F100
pin11 = H (2.6V),
Pin9 = L
Yes
Yes
Check pam100pin
2,3,5,6,8+Vbatt
pin4, OK?
No
osc100pin
16,17,29
No
32,36 ≥2.8V
pin10≥1.8V
Yes
9-22
No
Check ANT Switch
control circuit
Change or Resolder F100
Resolder or Change pam100
Check VBAT or PAM
control signal
Check U102,
C120,C124126126,L123
Resolder U102
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