Crest Audio CD 1500, Руководство пользователя

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2
p. 7
installation
Make certain that there
is enough space around
the front and rear of the
amplifier to allow the
heated air to escape.
When mounting in a rack,
try to avoid using doors
or covers on the front
and rear of the enclosure;
the exhaust air must not
be impeded
suggestion
In racks with closed backs
allow at least
one stan-
dard-rack-space opening
for every four amps.
a
cooling and ventilation
CD amplifiers use a forced air cooling system to maintain a low, even operating tem-
perature.
Air is drawn in by a DC fan on the rear panel, flows through the cooling fins and then
exhausts through the front panel vent.
Heat sink temperature is monitored and controls the variable speed fan. Fan speed
increases only as required, keeping fan noise to a minimum.
Keep this unit 8” from any combustible surface on all sides.
If the heat sink surpasses its maximum allowed temperature, the thermal protection
circuit will activate and open the output relays allowing the amplifier to cool to a safe
temperature. Normal operation will resume once the amplifier cools to a safe level.
Thermal protect activation only occurs under extreme thermal conditions and is not
part of normal operation.
powering
Unless otherwise specified when ordered, CD amplifiers are supplied factory set to
following voltage options :
Option 1
US domestic
nominal 120Vac 60Hz for rated power output
(safe operating range 100 - 132Vac )
Option 2
export models
nominal 230Vac 50Hz for rated power output
(safe operating range 200 - 253Vac )
maintenance
On some CD amplifier models the fan is supplied with a removable foam filter.This fil-
ter should be cleaned periodically with compressed air.
If the amplifier is used in an extremely dusty or smoky environment , the unit should
be periodically blown free ( using compressed air ) of any foreign matter that may have
built up inside the unit.
Users will not need to make any adjustments to the amplifier during its lifetime.There
are no user-serviceable parts or adjustments that require opening the amplifier.