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9. PROBLEM CHART
PROBLEM:
CAUSE:
REMEDY:
No power.
• The power-cord is not connected.
• Check the power-cord and any
extension-cables.
No sound.
• The power-cord of the respective
device is not connected properly or
not connected at all.
• The connection-socket or the plug is
dirty.
• Check the power-cord and if the
plugs are tightly connected with the
sockets.
• Clean the socket and/or the plug.
Noise.
• The input-signal is too strong.
• Reduce the input-signal via the Gain-
control.
Fan does not work, LEDs
do not light up
• The power-cord is not connected.
Please check if the power is available
Protect LED lights up
permanently
• Inputs receive DC-voltage.
• Amplifier is overheated due to
impurities.
• Impedance of speakers too low
• Short-circuit in speaker connection or
in speakers
• Technical default of amplifier
• Switch amplifier off and have the
device checked by a service-
technician.
• Clean the fan-grille.
• Connect other speakers.
• Check speakers.
• Switch amplifier off and have the
device checked by a service-
technician.
10. CLEANING AND MAINTENANCE
The operator has to make sure that safety-relating and machine-technical installations are inspected by an
expert after every four years in the course of an acceptance test.
The operator has to make sure that safety-relating and machine-technical installations are inspected by a
skilled person once a year.
Disconnect from mains before starting maintenance operation!
DANGER TO LIFE!
We recommend a frequent cleaning of the device. Please use a soft lint-free and moistened cloth. Never use
alcohol or solvents!
There are no serviceable parts inside the device except for the fuse. Maintenance and service operations are
only to be carried out by authorized dealers.
Replacing the fuse
If the fine-wire fuse of the device fuses, only replace the fuse by a fuse of same type and rating.
Before replacing the fuse, unplug mains lead.
Procedure:
Step 1:
Open the fuseholder on the rear panel with a fitting screwdriver.
Step 2:
Remove the old fuse from the fuseholder.
Step 3:
Install the new fuse in the fuseholder.
Step 4:
Replace the fuseholder in the housing.
Should you need any spare parts, please use genuine parts.
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