7
When you press one of the volume control buttons on the remote control, the front panel will illuminate on
and the arrow that indicates whether the level is climbing or descending. Arriving at the maximum
attenuation or maximum exaltation written and arrows do not light up anymore, indicating that they have
been reached the limits of adjustment.
Press "MUTING", when pressed on the remote, due to the lowering of instantaneous output level of 20 dB.
To return to the original level is sufficient to press the switch.
TURNING OFF THE AMPLIFIER
To put the amplifier in STAND-BY, and just press on the remote control simultaneously the keys (+ / -).
To turn off the amplifier you must first press the right button on the front panel and then subsequently lead to
the OFF position the switch on the rear panel. The microprocessor control provides first a short circuit by the
output signal from the preamplifier, so as to prevent impulsive noise, then deactivates the relay that supplies
power to the power supply main: at this point all the lights on the panel are turned off.
WARNING: NEVER TURN OFF THE AMPLIFIER WITH THE MAIN LINE SUPPLY POWER
SWITCH BEFORE HAVING PLACED THE UNIT IN STAND-BY. THIS ERRONEUS
PROCEDURE WILL CAUSE VIOLENT TRANSIENT AT THE AMPLIFIER OUTPUT, WITH
POTENTIALLY DANGEROUS EFFECTS ON THE SPEAKERS.
TROUBLESHOOTING
The main power switch is turned on, but the POWER LED is not illuminated.
The wall outlet is not powered.
Check that the correct voltage is presents at the end of the power cord. If
the mains supply voltage is supplied to the machine
The fuse to the microprocessor has blown*.
Turn off the amplifier, disconnect the cord from the wall socket,
remove the fuse from its holder and check for continuity.
If the fuse is in good condition,
The POWER LED is burned out
Try to activate the amplifier using the remote control. If there is not
action,
The microprocessor has failed.
The POWER LED is illuminated but the amplifier does not respond to the remote control.
The infrared detector on the amplifier is obstructed, or it is placed at an
angle greater than 30° with respect to the remote control.
Check that the amplifier is in correct position.
If the amplifier is in the correct position,
The batteries in the remote control unit are dead.
Check the battery charge level, and replace as required.
If the battery are charged,
The remote control unit has malfunctioned.
Try setting the amplifier with another remote control of the same
type.
If the unit still does not work properly,
the infrared detector has failed.
The amplifier goes ON normally, but no sound is produced by the speakers.
The program source is not connected correctly.
Check that the input selected is correctly connected to the audio
source.
If the connections are correct,
The source is not functioning properly,
Check that a correct signal is output by the source.
If the output signal is correct,
The cable are bad.
Check the electrical continuity of the cables and jacks.
Summary of Contents for MK 2250
Page 1: ...1 Owner s Manual MK 2250...