Problem Chart; Cleaning And Maintenance; Replacing The Fuse - Omnitronic MCR-4250 Bedienungsanleitung

If one of the PROTECT LEDs lights up red during operation or if it does not extinguish after switching on, the
amplifier has to be switched off and the cause of the fault has to be removed.

9. PROBLEM CHART

PROBLEM:
No power.
No sound.
Noise.
Fan does not work, LEDs
do not light up
Protect LED lights
permanently

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.
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.
CAUSE:
• The power-cord is not connected.
• The power-cord of the respective
device is not connected properly or
not connected at all.
• The connection-socket or the plug is
dirty.
• The input-signal is too strong.
• The power-cord is not connected.
up • 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
DANGER TO LIFE!
Disconnect from mains before starting maintenance operation!
• Check the power-cord and any
extension-cables.
• Check the power-cord and if the
plugs are tightly connected with the
sockets.
• Clean the socket and/or the plug.
• Reduce the input-signal via the Gain-
control.
Please check if the power is available
• 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.
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REMEDY:
00030070.DOC, Version 1.0