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Flow Chart of Troubleshooting
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9-31
9-16. PCS Transmitter
C118, C116, C115
≥2.8V
C114 ≥ 2.9V
Yes
Resolder U101
Check UCP200
END
No
Yes
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
No
Check & Resolder
U101, C118, C116, C115
And PMU Part
Check +VBAT or PAM
control signal
Resolder R102 or Change
U107
Check U107 pin
2,3,5,6,8+Vbatt
pin4, OK?
Yes
U101 pin C2, B1,
B2, A1 ≥ 0.2Vp_p
Resolder or Change
R100
Check ANT Switch
control circuit
Change or Resolder F100
R102
≤ -4dBm
U107 pin18
≥ 25dBm
F100 pin11
≥ 25dBm
Check F100
pin10 = H (2.6V),
pin12 = L
TX ON (0Level)
Resolder RFS100,C101,L107
F100 Pin8
≥ 25dBm