McIntosh MC 2250, Руководство пользователя

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Remove the three screws securing the shipping
pallet and remove the pallet and bottom shipping
pad. Remove the plastic shipping bag. If the
amplifier is to be mounted in a cabinet or rack
mount, remove the four plastic feet from the bottom
of the amplifier. If the amplifier is used alone, leave
the feet screwed to the amplifier. They are
necessary to hold the amplifier above the supporting
surface to allow adequate ventilation. The amplifier
can not be used without ventilation through the
chassis and heatsinks.
INSTALLATION IN A MclNTOSH CABINET
Install the amplifier by following the instructions
enclosed with the cabinet.
The MC 2250 can be housed in a Mclntosh L54
cabinet, installed in a custom cabinet or mounted in
a standard 19 inch rack by using the addition of
RACK MOUNTING ADAPTERS (RMA 7). The MC 2250
weights 80 pounds (36.3 kg). In any installation it is
necessary to provide proper support for the weight.
The mounting methods described and the amplifier
have been designed to accomodate the weight. Be
sure that the panel in which the amplifier is mounted
can also handle the weight.
UNPACKING THE AMPLIFIER
Remove the amplifier and hardware package from
the outer and inner shipping cartons. Be careful to
avoid maring or placing a strain on the edges of the
front panel. Place the amplifier upside down on a
surface that will support the transformer and heat-
sinks but will not touch the edge of the front panel. A
pad from the shipping carton can be used for this
purpose.
INSTALLATION IN A CUSTOM CABINET
The trouble-free life of an electronic instrument is
greatly extended by providing sufficient ventilation
around it. This prevents the buildup of high internal
temperatures that cause deterioration. Allow
enough clearance so that cool air can enter at the
bottom of the cabinet and be vented from the top.
With adequate ventilation the instrument can be
mounted in any position. The recommended
minimum space for installation is 15 inches (38.1
cm) deep, 17 inches (43.2 cm) wide, and 8 inches
(20.3 cm) high.
Vertical mounting of the amplifier requires careful
consideration. The total weight is supported by the
panel and shelf on which the amplifier is to be
mounted. Thought should be given to providing a
means for raising the amplifier out of the panel.
More consideration should be given to providing
adequate ventilation at the panel in vertical moun-
ting. The heat sinks are at the rear of the chassis per-
mitting the heat to pass over the entire chassis. It is
then trapped behind the panel causing the overall
temperature to rise. In any case, air flow for cooling
can be improved by the use of a properly installed
low noise fan. Adequate cooling will extend the life
of the amplifier.
DEPTH REQUIRED
TOP OF SHELF & BOTTOM
OF CUTOUT SHOULD COINCIDE.
Fig. 1. Views showing mounting shelf in position.
-2-
MOUNTING SCREWS
DIFFERENCE BETWEEN SCREW
LENGTH & TOTAL SHELF THICKNESS
MUST NOT EXCEED 1/2"
SHELF