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 |