Tc-978 Warning Message Troubleshooting; Warning Display Messages - FreeFlight FDL-978-TX Quick Reference Manual

FreeFlight FDL-978-TX Transmitter (P/N 85595-00)
Quick Reference Guide
WARNING
Synth Unlock
TX Fault
Tx Power Low
Tx PSU High
Tx PSU Low
Squitter Fail
Remote Hot
No ADS-B Pos
GPS Fault
Top ant Fault
Bot ant Fault
PSU Fail
ADC Fault
TC978 Display Msg
Synth Unlock
Tx Fault
Tx Power Low
Tx PSU High
Tx PSU Low
Squitter Fail
Remote Hot
No ADS-B Pos
GPS Fault
Top ant Fault
Bot ant Fault
PSU Fail
ADC Fault
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Waco, TX 76706-3756
USA
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TC-978 Warning Message Troubleshooting

POTENTIAL CAUSE
Transmitter can't lock to carrier
frequency
Generic Transmitter Fault – POST,
transmit, address, broadcast, or
nominal rate failure.
Transmitter power too low
Transmitter power supply voltage too
high.
Transmitter power supply voltage too
low.
Transmitter modulation fault
FDL-978-TX internal temperature too
high.
GPS position not acquired, satellite
tracking lost, or GPS not
communicating
Top antenna disconnected.
Bottom antenna disconnected.
Internal DC Power Supply failure.
Air Data Computer or Altitude
encoder fault or not responding.

Warning Display Messages

Description
Transmitter Diagnostic – Timing fault
UAT transmitter fault
UAT transmitter power low during transmit
UAT transmitter power supply output too high
UAT transmitter power supply output too low
System Diagnostic
FDL-978-TX internal temperature too high
GPS position not acquired or satellite tracking lost
GPS has reported a fault or not responding
Top antenna disconnected
Bottom antenna disconnected
Internal DC power supply failure
ADC or Altitude sensor fault or not responding
Publication #86963 Rev B
TROUBLESHOOTING
Cycle Power on the FDL-978-TX
If Problem Persists, Contact Authorized Service
Center