RADIO TROUBLE SHOOTING Master Switch ON Fuse IN Breaker IN

RADIO TROUBLE SHOOTING
Master Switch
Fuse
Breaker
Radio Master Switch
Radio Volume
Frequency
Nav. Ident Button
TROUBLE SHOOTING HINTS
ON
IN
IN
ON
ON and Loud
123.50
In or OFF, Volume DOWN
Audio panel
See diagram below
Intercom Volume
ON and set
Intercom Squelch
SET (can hear yourself speak)
Intercom/ISO to INTERCOM (not to “Pilot Isolate”)
If you can’t hear your passengers ensure that the ISOLATE
switch is set to INTERCOM, not Pilot Isolate
If you can hear yourself speaking in your headset (sidetone),
there is likely power through the system (check frequency,
radio selected)
If there is no sidetone, it is likely a power failure or
misconnection (check switches, connections and breakers).
When you use the PTT (push to talk) you should hear a
quieter than normal sidetone (check the PTT connection or
radio selection).
Headset Volume
ON and adjusted
(set to MONO if option exists)
Headset
PLUGGED IN FULLY
Swap headsets with passenger to check if headset is the
problem.
(HOLD THE PLUG BODY WHEN PLUGGING OR UNPLUGGING THE HEADSET (pulling on the cords instead
of the body causes broken wires).
RADIO TROUBLE DURING FLIGHT
Make sure the Radio is properly plugged in – push in gently.
To eliminate background noise, adjust intercom squelch and
radio squelch and ensure Nav. Ident Button is In or OFF,
Volume DOWN
If the PTT switch isn’t working, use the copilot’s headset and
the copilot’s PTT button. DO NOT SWITCH THE PLUGS
TO THE OTHER JACKS.
When trying to contact a distant station and reception is poor,
try pulling out the squelch knob to disconnect it from the
circuit allowing full reception signal to get through.
If all else fails, use microphone and overhead speaker.