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