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Flow Chart of Troubleshooting
10-38
10-15. DCS Transmitter
Resolder RFS100, C113, L102
U107 pin11,12,16,29,
32, 33,36
≥
2.8V
pin 10
≥
1.8V
F100 Pin13
≥
25dBm
TX ON (0Level)
Check F100
pin9 = H (2.6V),
pin11 = L
F100 pin8
≥
25dBm
U106 pin18
≥
25dBm
U106 pin1
≤
-4dBm
Change or Resolder F100
Check ANT Switch
control circuit
Resolder or Change
C122, C123, L112
U107 pin 4,5,6,7
≥
0.2Vp_p
Yes
Check U106
pin2,3,4,5,6 OK?
Resolder or Change U106
Check +VBAT or PAM
control signal
Check & Resolder
C128, C134, C137
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
No
Yes
No
END
Check UCP200
Resolder U107
Yes