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.