Protective Circuits; Problem Chart - Omnitronic MCP-4150 Bedienungsanleitung

9. PROTECTIVE CIRCUITS

The integrated protective circuits prevent damage to the speakers and the amplifier. To prevent distortions in
case overload, the integrated level limiter reduces the input signal if the limit level is reached at the output. If
one of the other protective cuircuits is activated, the speakers are electrically separated from the amplifier:
• for a few seconds after switching-on until the speaker outputs are ready for operation
• in case of overheating of the amplifier
• in case of overload of the amplifier
• in case of DC voltage at a speaker output
• in case of a short-circuit at a speaker output (the clip indicator of the corresponding channel lights up)
If the speakers are switched off during operation or if they are not ready for operation after switching on, the
amplifier has to be switched off and the cause of the fault has to be removed.

10. PROBLEM CHART

PROBLEM
No power.
No sound.
Fan does not work, LEDs
do not light up.
Speakers are switched off
CAUSE
Power cable is not connected.
•
Power cable of respective signal
•
source is not connected properly or
not connected at all.
Connection jack or plug are dirty.
•
Power cable is not connected.
•
Amplifier is overheated
•
impurities.
Impedance of speakers too low.
•
Short-circuit in speaker connection or
•
in speakers.
Technical default of amplifier.
•
30/32
Check power
•
extension cables.
Check power cable and if plugs are
•
tightly connected with jacks.
Clean jacks and/or plug.
•
Please check if power is available.
•
due to Clean fan grille.
•
Connect other speakers.
•
Check speakers.
•
Switch amplifier off and have it
•
checked by a service technician.
00052968.DOC, Version 1.2
REMEDY
cable and any