McIntosh MR-75 Owners manual

THE MR 75 AM/FM TUNER

Reading Time: 32 Minutes

Price $2.00

VARIOUS REGULATORY AGENCIES REQUIRE THAT WE BRING THE FOLLOWING
INFORMATION TO YOUR ATTENTION. PLEASE READ IT CAREFULLY.

WARNING: TO PREVENT FIRE OR SHOCK

HAZARD, DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE.

The Mclntosh you have purchased is a Model MR 75.
It has a serial number located on the rear panel of the
chassis. Record that serial number here:

Serial Number

The model, serial number and purchase date are
important to you for any future service. Record the
purchase date here:

Purchase date

Upon application, Mclntosh Laboratory provides a

Three-Year Service Contract. Your Mclntosh author-

ized Service Agency can expedite repairs when you
provide the Service Contract with the instrument for
repair. To assist, record your Service Contract number
here:

Service Contract Number

Your MR 75 AM/FM Tuner
can give you many years of
satisfactory performance. If you

have any questions, please contact:

CUSTOMER SERVICE

Mclntosh Laboratory Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: [phone]

Take Advantage of 3 years
of Contract Service-

Fill in the Application NOW.

McINTOSH THREE YEAR SERVICE CONTRACT

An application for A THREE YEAR SERVICE CONTRACT is included with this manual.

The terms of the contract are:

1. Mclntosh will provide all parts, materials
and labor needed to return the measured
performance of the instrument to the
original performance limits. The SER­VICE CONTRACT does not cover any

shipping costs to and from the authoriz-

ed service agency or the factory.

2. Any Mclntosh authorized service agency
will repair Mclntosh instruments at nor-

mal service rates. To receive service
under the terms of the SERVICE CON­TRACT, the SERVICE CONTRACT CER­TIFICATE must be presented when the
instrument is taken to the service agency.

3. Always have service done by a
Mclntosh authorized service agency. If
the instrument is modified or damaged
as a result of unauthorized repair, the
SERVICE CONTRACT will be cancelled.
Damage by improper use or mishandl­ing is not covered by the SERVICE
CONTRACT.

4. The SERVICE CONTRACT is issued to
you as the original purchaser. To pro-

tect you from misrepresentation, this

Contents

SERVICE CONTRACT INFORMATION 1

INSTALLATION 2, 3

HOW TO CONNECT AND

BACK PANEL INFORMATION 4-6

FRONT PANEL INFORMATION

AND USE OF CONTROLS 6, 7

PERFORMANCE LIMITS 8

PERFORMANCE CHARTS 9, 10

TECHNICAL DESCRIPTION 11, 12

BLOCK DIAGRAM 13

contract cannot be transferred to a se­cond owner.

5. To receive the SERVICE CONTRACT,
your purchase must be made from a
Mclntosh franchised dealer.

6. Your completely filled in application for
the SERVICE CONTRACT must be post­marked within 30 days of the date of
purchase of the instrument.

7. To receive the SERVICE CONTRACT, all
information on the application must be
filled in. The SERVICE CONTRACT will
be issued when the completely filled in
application is received by Mclntosh
Laboratory Incorporated in Binghamton,
New York.

8. Units in operation outside the United
States and Canada are not covered by
the Mclntosh Factory Service Contract,
irrespective of the place of purchase.
Nor are units acquired outside the
U.S.A. and Canada, the purchasers of
which should consult with their dealer
to ascertain what, if any, service con-

tract or warranty may be available locally.

Copyright 1981 © by Mclntosh Laboratory Inc.

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THE MR 75 AM/FM TUNER

Installation

The PANLOC system of installing equipment con-

veniently and securely is a direct result of Mclntosh

research. By depressing the two PANLOC buttons on
the front panel, the instrument either can be locked
firmly in place or it can be unlocked so that the
chassis can slide forward, giving you easy access to
the top and rear panels.

The trouble-free life of an electronic instrument is
greatly extended by providing sufficient ventilation to
prevent the build-up 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 6
inches (15.2 cm) high.

To install the instrument in a Mclntosh cabinet,

follow the instructions that are enclosed with the
cabinet. For any other type of installation, follow
these instructions:

1. Open the carton and remove the PANLOC brack­ets, hardware package, and mounting template. Re­move the MR 75 from its plastic bag and place it up­side down on the shipping pallet, then unscrew the
four plastic feet from the bottom of the chassis.

2. Mark the cabinet panel
Place the mounting template in the position on the
cabinet panel where the instrument is to be installed,
and tape it in place. The broken lines that represent
the outline of the rectangular cutout also represent
the outside dimensions of the chassis. Make sure
these lines clear shelves, partitions, or any equip-

ment. With the template in place, first mark the six A
and B holes and the four small holes that locate the
corners of the cutout. Then, join the four corner mark­ings with pencil lines using the edge of the template

as a straightedge.

3. Drill Holes
Use a drill with a 3/16 inch bit held perpendicular to the
panel and drill the six A and B holes. Then, using a drill
bit slightly wider than the tip of your saw blade, drill
one hole at each of two diagonally opposite corners.

The holes should barely touch the inside edge of the

penciled outline. Before taking the next step, make

sure that the six A and B holes have been drilled.

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4. Saw the Panel Cutout
Saw carefully on the inside of the penciled lines. First
make the two long cuts and then the two short cuts.
After the rectangular opening has been cut out, use a
file to square the corners and smooth any irregulari­ties in the cut edges.

each side, attach the PANLOC brackets to the cabi­net panel; the short flange is mounted against the
front (face) of the cabinet panel. The screws pass
through the PANLOC bracket flange, the cabinet pan­el, and then through the mounting strips previously
mounted.

5. Install the Mounting Strips
In the hardware package you will find two mounting
strips and two sets of machine screws. For panels
that are less than ½ inch thick, use the ¾ inch
screws; for panels that are more than ½ inch thick,
use the 1 ¼ inch screws.

Starting at the right-hand side of the panel, insert a
screw of proper length into the center hole in the
panel, marked B on the template. On the back of the
panel, align a mounting strip with the holes in the
panel and tighten the screw until the screwhead is
pulled slightly into the wood.

Repeat this procedure to attach the mounting strip
to the left side of the panel.

6. Attach the PANLOC Brackets
Using two screws of proper length in the A holes on

7. Install the Instrument
Guide the AC power cord through the panel opening
to the back of the cabinet; then, slide the instrument

into the opening carefully so that the rails on the bot­tom of each side of the chassis engage the tracks on
the mounting brackets. Continue to slide the instru-

ment into the cabinet until it is stopped by the adjust

position latches. Press the latches inward, this per-

mits the instrument to slide into the cabinet until its
front panel is flush with the cabinet panel. Depress
the PANLOC buttons at the lower left and right cor-

ners of the instrument panel to lock the unit firmly in
the cabinet. Depressing the PANLOC buttons again
will unlock the instrument so that it can slide forward
to the adjust position; if you press inward on the ad­just position latches then you can remove the instru-

ment from the cabinet.

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