LD Systems U504.7 IEM Wireless Stereo In-Ear Monitoring System (470 to 490 MHz) - Manual (Page 16)

TROUBLESHOOTING
PROBLEM DISPLAY SOLUTION
No audio signal or level
too low
Receiver: Reception is not indicated by RF LED. Check if the transmitter is turned on.
Receiver: Display lighting is switched off Check that the receiver is switched on and that the
battery charge status is sufficient.
Receiver: Reception is not indicated by RF LED.
Transmitter: Device is switched on. Audio signal
is available.
Check that the radio frequency of the transmitter and
receiver is the same.
Check the transmit power.
Reduce the distance between transmitter and receiver.
Make sure that there is a direct line of sight between
transmitter and receiver.
Make sure that the antennas of transmitter and receiver
are correctly connected, not covered and not kinked.
Reduce the level of noise reduction (SQUELCH)
Receiver: Reception is indicated by RF LED. Check whether an audio signal is present at the
transmitter.
If necessary, increase the signal level of the playback
device or check the GAIN setting in the transmitter.
Distortion and
interference
Receiver: Reception is indicated by RF LED. Remove possible sources of interference (digital devices,
other radio systems).
Increase the level of noise reduction (SQUELCH)
at the receiver.
Distorted sound Receiver: "LOW BATTERY" is displayed.
Receiver: Peak is shown AF PK in the receiver and
transmitter display.
Check the headphone output of the transmitter.
Make sure that the available signal is "clean".
If necessary, reduce the signal level of the playback
device or lower the audio level GAIN in the transmitter.
RECOMMENDATIONS FOR ERROR PREVENTION
• When using a radio transmitter and a radio receiver on your body at the same time, position the two devices as far apart
from each other as possible.
• Do not install the radio receiver and radio transmitter together in a rack, and position a receiver rack as far away
from a transmitter rack as possible.
• When rack-mounting transmitters or receivers, maintain at least half a height unit between the two.
• Use separate power supplies for transmitter and receiver and do not use the same power supply for wireless systems
made by different manufacturers.
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