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10-17. PCS Transmitter
TX ON (0Level)
Yes
F101 pin13
≥ 25dBm
No
F101 pin8
≥ 25dBm
No
PAM100 pin18
≥ 25dBm
No
PAM100 pin1
≤ -4dBm
Yes
U104 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check UCP200
END
Yes
Resolder RFS100,C113,C154
Yes
Yes
Resolder or Change
No
No
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Check F101
pin9 = H (2.6V),
pin12 = L
Yes
C134
Yes
Check PAM100 pin2,
3,4,5,8 is ok?
No
U104 pin11,12,17,
No
32,33 ≥ 2.8V
pin 10 ≥ 1.8V
Yes
10-31
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder F101
Resolder or Change PAM100
Check +VBAT or PAM
control signal
Check & Resolder
C126,C130,C132
And PMU Part
Resolder U104
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