ASR Audio Systems Friedrich Schaefer, D-35745 Herborn, Germany +49 / 2772 – 42 905
High End Integrated Amplifier ASR Emitter I and II version 2009 on Page 14
4.2
Distortion- and Overload-protection circuit
This protection switches the ASR Emitter OFF in case of
overload
or a
missing
supply
voltage
.
When you play so loud that the required output voltage is higher than the operational voltage of
the amplifier the signal pulse are cut. This results in
very high distortions
that may
damage
the midrange- and treble drivers of your loudspeakers.
As soon as the protection circuits detects distortion, the distorted channel of the ASR Emitter is
switched OFF – the display
indicates
the switch OFF with two flashing red Led bars „
Overload
“
and „
Offset
“.
These two Leds are flashing, too, if the loudspeaker-outputs are not free from DC voltage.
The duration of the switch OFF time delay is variable with one two switch Dip switch per channel
Switch 1
OFF long switch-off time ON Switch-off time short
Switch 2
OFF no influence
ON No disconnection at distortion or short-circuit
If the protection circuit is switched OFF, the amplifier can no more recognise a short circuit of the
loudspeaker outputs during operation!
!! WARNING !!
For this reason, this switch position should only be used in exception.
A guarantee can not be undertaken at switched Off protection circuit.
4.3
Over-temperature protection circuit
The ASR Emitter is equipped with a sensitive over-temperature protection circuit. Temperature
sensors are located at the large heat sinks of the ASR Emitter. If these sensors detect a temperature
> 55° Celsius, the ASR Emitter will be switched off. The display indicates the switch off with a
flashing Led (red) „Overheat“. Please put the left knob on the ASR Emitter’s front plate to the
„Off“-position. After the amplifier has cooled down you can switch the amplifier On again.
5.0
Maintenance of the ASR Emitter
5.1
Cleaning of the ASR Emitter
The standard cleaning set includes everything you need to take care of the finish of the ASR
Emitter: antistatic plastic cleaner and a special cloth. Please do not use any other cloths than
the supplied one to clean the acrylic glass of the ASR Emitter.
The use of the plastic cleaner is quite simple: spray some of the liquid on the acrylic glass and
spread it with the cloth. Clean the acrylic glass, wipe off the liquid and polish it with the cloth.
The knob on the front plate is sealed and may not be cleaned with anything else than a soft cloth
with no liquids or chemicals on it.
Tipp:
if your are not using your equipment for a certain time cover it with a soft, fluff-free cloth –
you avoid most of the soiling on your equipment.
Removal of scratches
Most of all scratches can easily be removed by using acrylic polishing paste. Please use as
specified by manufacturer. After the use of acrylic polishing paste you should use the plastic
cleaner. The ASR warranty does not cover any damage caused by using any other cleaner than the
supplied one.