Lectrosonics QUADUHFD - Manual (Page 7)

Multi-channel Wireless System
TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSE
NO POWER LEDs OR AUDIO 1) Power switch in the OFF position. Switch to EXT or EXT OR BAT.
POWER LED LIGHTS ON UDM6
BUT NO LIGHTS ON RECEIVERS 1) Power leads in back not connected to receivers.
Check power connections.
2) Check power switch on receivers.
NO POWER LEDs, ALL
CONNECTIONS CHECK OK 1) Gel-cell battery charge too low. Either use an external 12 VDC
power supply, or operate on110 to 240 VAC with the CH-80
charger.
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 improperly connected. Check antenna.
3) Antenna “blocked” or in poor RF location. Try moving the
system or the antenna.
4) Transmitter modulation improperly set. Check mod levels.
INTERNAL GEL-CELLS NOT CHARGING 1) Check CH 80 charger - Output voltage should be 15 VDC on
pin 3, with pin 2 as ground.
Rio Rancho, NM – USA 7