00042241.DOC, Version 1.3
20/21
7 CLEANING AND MAINTENANCE
Disconnect from mains before starting maintenance operation!
DANGER TO LIFE!
We recommend a frequent cleaning of the devices. Please use a soft lint-free and moistened cloth. Never
use alcohol or solvents!
There are no serviceable parts inside the devices. Maintenance and service operations are only to be carried
out by authorized dealers.
Should you need any spare parts, please use genuine parts.
Should you have further questions, please contact your dealer.
8 PROBLEM CART
PROBLEM
REMEDY
No power.
•
Check the connection cable of the power unit and any extension-cables.
No sound; receiver HF
indicator does not light.
•
Make sure transmitter and receiver are switched on.
•
Check the transmitter's battery LED to ensure that the battery is providing
power. Replace the battery if necessary.
•
Make sure that the receiver is in the line of sight of the transmitter. If
necessary, reduce the distance between transmitter and receiver.
No receiver sound;
receiver HF indicator
lights.
•
Turn up the receiver audio output level control.
•
Check for proper connection between receiver and mixer/amplifier.
•
Talk into the microphone and observe the receiver's HF indicator. If it lights up
the problem is elsewhere in the sound system.
Received signal is noisy
or contains extraneous
sounds with transmitter
on.
•
Check the transmitter's battery LED to ensure that battery is providing power.
•
Remove local sources of HF interference, such as lighting equipment.
•
Two transmitters may be operating on the same frequency. Locate and turn
one off.
•
The signal may be too weak. If possible, move the receiver closer to the
transmitter.
Noise from receiver with
transmitter off.
•
Remove local sources of HF interference, such as lighting equipment.
•
Reposition the receiver.
Momentary loss of sound
as transmitter is moved
around performing area.
•
Reposition receiver and perform another test and observe the HF indicator. If
audio drop-outs persist, mark these dead spots in the performing area and avoid
them during the performance.
