SERVICE
Fault Finding Guide

The following is a list of symptoms and causes which can be useful when fault finding:


 
Headset Problems
Possible Cause
Solution
Distortion in both earpieces
Headset battery not charged
Refer to charging instructions
Faulty microphone
Return to Lynx service facility
Foreign objects behind speaker grills
Clean using Air-Duster aerosol
Moisture on headset circuit board
Dry in warm place
Faulty headset circuit board
Return to Lynx service facility
Distortion in one earpiece
Foreign objects behind speaker grill
Clean using Air-Duster aerosol
Faulty headset battery
Return to Lynx service facility
Headset does not recharge
Faulty headset headband / battery
Return to Lynx service facility
Headset coiled lead damaged
Return to Lynx service facility
Headset circuit board fuse blown
Return to Lynx service facility
Faulty headset circuit board
Return to Lynx service facility
Faulty system charger
Return to Lynx service facility
Headset discharges very quickly
Faulty headset headband / battery
Return to Lynx service facility
Faulty headset circuit board
Return to Lynx service facility
Headset coiled lead damaged
Return to Lynx service facility
Audio very quiet in both earpieces
Microphone incorrectly positioned
Refer to instruction manual
Microphone damaged / twisted
Return to Lynx service facility
Volume control incorrectly adjusted
Refer to instruction manual
Moisture in microphone
Dry in warm place
Moisture on headset circuit board
Dry in warm place
Loud background noise in headset
Microphones incorrectly positioned
Refer to instruction manual
Microphone damaged / twisted
Return to Lynx service facility
Volume control incorrectly adjusted
Refer to instruction manual
Incorrect radio squelch setting
Refer to instruction manual
One earpiece dead
Faulty speaker
Return to Lynx service facility
Faulty headset headband / battery
Return to Lynx service facility
Crackling in right-hand earpiece
Faulty headset headband / battery wiring
Return to Lynx service facility
Crackling in both earpieces
Headset coiled lead damaged
Return to Lynx service facility
Faulty headset headband / battery wiring
Return to Lynx service facility
 
Radio Interface Problems
Possible Cause
Solution
No radio transmission (No TX in Radio Display)
Incorrect Interface configuration
Return to Lynx service facility
Interface radio lead damaged
Return to Lynx service facility
Interface jack plugs damaged
Return to Lynx service facility
Faulty P.T.T. switch
Return to Lynx service facility
Radio battery not charged
Refer to charging instructions
Headset battery not charged
Refer to charging instructions
Radio jack plug sockets damaged
Return to radio service facility
Poor quality radio transmission
Microphones incorrectly positioned
Refer to instruction manual
Incorrect interface configuration
Refer to instruction manual
Incorrect PTT input selected
Refer to instruction manual
Faulty antenna
Replace or repair
Interface jack plugs dirty
Clean jack plugs
Radio battery not charged
Refer to charging instructions
Intermittent radio transmission
Faulty PTT switch
Return to Lynx service facility
Interface radio lead damaged
Return to Lynx service facility
Interface jack plugs dirty
Clean jack plugs
Faulty antenna
Replace or repair
No radio reception (No RX in Radio Display)
Incorrect frequency setting
Refer to instruction manual
Incorrect squelch setting
Refer to instruction manual
Faulty antenna
Replace or repair
Radio battery not charged
Refer to charging instructions
Poor quality radio reception
Engine ignition interference
Screen plugs caps and ignition leads
Faulty antenna
Replace or repair
Radio volume incorrectly adjusted
Refer to instruction manual
Interface radio lead damaged
Return to Lynx service facility
Interface Jack Plugs damaged
Return to Lynx service facility
Radio jack plug sockets damaged
Return to radio service facility
Headset battery not charged
Refer to charging instructions
Incorrect Interface configuration
Return to Lynx service facility
Intermittent radio reception
Interface radio lead damaged
Return to Lynx service facility
Faulty antenna
Replace or repair
Interface jack plugs dirty
Clean jack plugs
Interference on radio reception
Engine ignition system
Screen plugs caps and ignition leads
Position of antenna in aircraft
Re-position antenna in aircraft
Faulty antenna
Replace or repair
Antenna cable routing
Re-route antenna cable
 
Radio/Power Interface Problems
Possible Cause
Solution
Interference in headsets (Engine noise)
Unfiltered power supply
Fit power supply filter
Cable routing
Reroute cables
No power supply to Radio
Headset not connected
Connected at least one headset
Incorrect power lead connection
Refer to installation instruction sheet
Incorrect 12Volt power connection
Refer to installation instruction sheet
Interface power fuse blown
Replace power fuse
In-line / main power fuse blown
Replace power fuse
Interface radio lead damaged
Return to Lynx service facility
Interface circuit board damaged
Return to Lynx service facility
Insufficient power supply (Less than 12Volts)
Charge or replace aircraft battery
Headset plug link broken
Return to Lynx service facility
 
Mobile Telephone Problems
Possible Cause
Solution
Loud 'Ticking' noise in headset when the telephone is on standby
Telephone antenna too close to intercom equipment
Use an external telephone antenna
Telephone does not switch to 'Hands-Free' mode
Incorrect Connection Procedure
A Telephone Specific Adapter must be fitted to the telephone before connecting the Mobile Telephone Lead
Telephone does not work
The Mobile Telephone Lead will not work when connected to the Audio Input/Output socket on a Radio/Power Interface
Connect the Mobile Telephone Lead to a headset using an Audio Adapter
Incorrect Telephone Specific Adapter
Refer to Telephone Compatibility List
Faulty Telephone Specific Adapter
Return to Lynx service facility
Faulty Mobile Telephone Lead
Return to Lynx service facility
Faulty Audio Adapter
Return to Lynx service facility
 

TopPreviousHomeNewsProductsPricesDistributorsBrochuresGeneralTechnicalServiceContactOther