Troubleshooting - Lectrosonics QUADUHFD Operating Instructions And Troubleshooting Manual

SYMPTOM
NO POWER LEDs OR AUDIO
POWER LED LIGHTS ON UDM6
BUT NO LIGHTS ON RECEIVERS
NO POWER LEDs, ALL
CONNECTIONS CHECK OK
POWER AND MODULATION LEDs ON,
BUT NO AUDIO
POWER LEDs ON, NO MODULATION LEDs
POOR SIGNAL/NOISE OR DROPOUTS
INTERNAL GEL-CELLS NOT CHARGING

TROUBLESHOOTING

POSSIBLE CAUSE
1) Power switch in the OFF position. Switch to EXT or EXT OR BAT.
1) Power leads in back not connected to receivers.
Check power connections.
2) Check power switch on receivers.
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.
1) No audio connection to recorder or mixer. Check
connections.
1) Transmitters not on or in mute position. Check transmitters.
2) Transmitters have dead batteries, check batteries.
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.
1) Check CH 80 charger - Output voltage should be 15 VDC on
pin 3, with pin 2 as ground.
Rio Rancho, NM – USA
Multi-channel Wireless System
7