Lectrosonics Pro 4 Channel - Manual (Page 7)

TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSE
NO POWER LEDs OR AUDIO 1) Power switch in the OFF position. Switch to ON.
POWER LED LIGHTS ON DM4
BUT NO LIGHTS ON RECEIVERS 1) Power leads in back not connected to receivers.
Check power connections.
POWER AND MODULATION LEDs ON,
BUT NO AUDIO 1) No audio connection to recorder or mixer. Check
connections.
POWER LEDs ON, NO MODULATION LEDs 1) Transmitters not on or in mute position. Check
transmitters.
2) Transmitters have dead batteries, check batteries.
POOR SIGNAL/NOISE OR DROPOUTS 1) Antenna leads not connected, Check antennas.
2) Main antenna(s) improperly connected. Check
antenna(s).
3) Antenna "blocked" or in poor RF location. Try
repositioning the antenna(s).
4) Transmitter modulation improperly set. Check mod
levels.
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