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Flow Chart of Troubleshooting
9-22
9-15. DCS/PCS Transmitter
④
TX ON (5Level)
①
Yes
U100 Pin17
≥
-65dBm
No
Resolder U100, L105, C116
Yes
Check ANT Switch
control circuit
U100 pin11
≥
-30dBm
Check U100
pin10 =H (2.6V)
pin16 = L
No
No
②
Change or Resolder U100
Yes
③
PAM100 pin15
≥
-30dBm
Yes
No
Resolder or Change C124, C125,
C126
Yes
Check PAM100 pin 1,
2,3,20, VBAT OK?
PAM100 pin3
≥
-4dBm
No
Resolder or Change
PAM100
No
Check VBAT or PAM
control signal
Check UCP200
Yes
END