McIntosh CR-7, CR-8 Owners manual

IMPORTANT SAFETY INSTRUCTIONS

THESE INSTRUCTIONS ARE TO PRO­TECT YOU AND THE MclNTOSH IN­STRUMENT. BE SURE TO FAMILIARIZE
YOURSELF WITH THEM.

1. Read all instructions - Read the safety and oper­ating instructions before operating the instrument.

2. Retain Instructions - Retain the safety and oper­ating instructions for future reference.

3. Heed warnings - Adhere to warnings and oper­ating instructions.

4. Follow Instructions - Follow all operating and use

instructions.

WARNING: TO REDUCE RISK OF FIRE OR ELEC­TRICAL SHOCK, DO NOT EXPOSE THIS INSTRU­MENT TO RAIN OR MOISTURE.

5. Power Sources - Connect the power supply only to
the type described in the operating instructions or
as marked on the unit.

6. Power-Cord Protection - Route power-supply cords
so that they are not likely to be walked on or pin­ched by items placed upon or against them, pay­ing particular attention to cords at plugs, conve­nience receptacles, and the point where they exit
from the instrument.

7. Ventilation - Locate the instrument for proper ven­tilation. For example, the instrument should not be
placed on a bed, sofa, rug, or similar surface that

may block ventilation openings; or, placed in a

built-in installation, such as a bookcase or cabinet,
that may impede the flow of air through the ven­tilation openings.

8. Heat - Locate the instrument away from heat
sources such as radiators, heat registers, stoves, or
other appliance (including amplifiers) that produce
heat.

9. Wall or Cabinet Mounting - Mount the instrument
in a wall or cabinet only as described in the
owners manual.

10. Water and Moisture - Do not use the instrument

near water - for example, near a bathtub,

washbowl, kitchen sink, laundry tub, in a wet

basement, or near a swimming pool, etc.

11. Cleaning - Clean the instrument by dusting with a
dry cloth. Clean the panel with a cloth moistened
with a window cleaner.

12. Object and Liquid Entry - Do not permit objects to
fall and liquids to spill into the instrument through
enclosure openings.

13. Power Lines - Locate any outdoor antenna away
from power lines.

14. Outdoor Antenna Grounding - If an outdoor
antenna is connected to the antenna terminal, be
sure the antenna system is grounded to provide
some protection against voltage surges and built
up static charge.
In the U.S.A., section 810 of the National Electrical
Code, ANSI/NFPA No. 70-1987, provides informa­tion on the proper ground for the mast and sup­porting structure, ground for the lead-in wire to an
antenna discharge
ductors, location of antenna-discharge unit, con­nection to grounding electrodes, and requirements
for the grounding electrode.
For ground wire:
a) Use No. 10 AWG (5.3 mm2) copper No. 8 AWG
(8.4 mm2) aluminum, No. 17 AWG (1.0 mm2)
copper-clad steel, bronze wire, or larger as ground
wire.
b) Secure antenna lead-in and ground wires to
house with stand-off insulators spaced from 4 feet
(1.22 meters) to 6 feet (1.83 meters) apart.
c) Mount antenna discharge unit as closely as
possible to where lead-in enters house.
d) Use jumper wire not smaller than No. 6 AWG
(13.3 mm2) copper or equivalent when separate
antenna grounding electrode is used.

unit,

and

size

of

ground

con-

15. Nonuse Periods - Unplug the power cord from the
AC power outlet when left unused for a long

period of time.

16. Damage Requiring Service - Service must be per­formed by qualified service personnel when:

A. The power supply cord or the plug has been

damaged; or
B. Objects have fallen, or liquid has been spilled
into the instrument; or
C. The instrument has been exposed to rain; or
D. The instrument does not appear to operate
normally or exhibits a marked change in perfor­mance; or
E. The instrument has been dropped, or the
enclosure damaged.

17. Servicing - Do not attempt to service beyond that
described in the operating instructions. All other
service should be referred to qualified service
personnel.

18. Grounding or Polarization - Do not defeat the in­herent design features of the polarized plug. Non­polarized line cord adaptors will defeat the safely

provided by the polarized AC plug.

19. CAUTION: TO PREVENT ELECTRICAL SHOCK DO

NOT USE THIS (POLARIZED) PLUG WITH AN EX-

TENSION CORD, RECEPTACLE OR OTHER OUTLET

UNLESS THE BLADES CAN BE FULLY INSERTED TO
PREVENT BLADE EXPOSURE.

Note to CATV system installer:

This reminder is provided to call the CATV system

installer's attention to Article 820-22 of the NEC

that provides guidelines for proper grounding

and, in particular, specifies that the cable ground

shall be connected to the grounding system of
the building, as close to the point of cable entry
as practical.

ATTENTION: POUR PREVENIR LES CHOCS ELEC­TRIQUES PAS UTILISER CETTE FICHE POLARISEE
AVEC UN PROLONCATEUR, UNE PRISE DE
COURANT OU UNE AUTRE SORTIE DE COURANT,

SAUF SI LES LAMES PEUVENT ETRE INSEREES A

FOND

SANS

EN

LAISSER

DECOUVERT.

AUCUNE

PARTIE

A

The lightning flash with arrowhead, within an

equilateral triangle, is intended to alert the user to

the presence of uninsulated "dangerous voltage"
within the product's enclosure that may be of suffi­cient magnitude to constitute a risk of electric shock

to persons.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO PREVENT THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR BACK). NO
USER-SERVICABLE PARTS INSIDE. REFER SERVICING

TO QUALIFIED PERSONNEL.

The exclamation point within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance (servicing) in-

structions in the literature accompanying the
appliance.

The serial number, purchase date, and Mclntosh

Laboratory Service Contract number are important to

you for possible insurance claim or future service.

Record this information here.

Serial Number

Purchase Date

Service Contract Number

Upon application, Mclntosh Laboratory
provides a Service Contract to the original
purchaser. Your Mclntosh Authorized
Service Agency can expedite repairs when

you present the Service Contract with the

instrument.

Copyright MCMLXXXVIII © by Mclntosh Laboratory Inc.

Contents

INTRODUCTION 3

FRONT PANEL 4

HAND HELD REMOTE 5

CONNECTIONS 6, 7, 8, 9
CONNECTIONS 10, 11, 12
CONNECTIONS 13

ACCESSORIES 14

PERFORMANCE LIMITS 15

BLOCK DIAGRAM 16, 17

Take Advantage of 3 Years of
Contract Service. . .
Fill in the Application NOW.

Your CR 7 and CR 8 Remote Control will 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 13903-9990

Phone: [phone]

MclNTOSH THREE YEAR SERVICE CONTRACT

An

application

The terms of the contract are:

I. If the instrument covered by this contract

becomes defective, Mclntosh will provide all parts,
materials, and labor needed to return the

measured performance of the instrument to the
original performance limits free of any charge. The
service contract does not cover any shipping costs
to and from the authorized service agency or the
factory.

2. Any Mclntosh authorized service agency will
repair all Mclntosh instruments at normal service
rates. To receive the free service under the terms

of the service contract, the service contract cer­tificate must accompany the instrument when
taken to the service agency.

3. Always have service done by a Mclntosh authoriz-

ed service agency. If the instrument is modified or

tor A

THREE

YEAR

SERVICE

CONTRACT

4. The service contract is issued to you as the

5. Units in operation outside the United States and

is

included

damaged as a result of unauthorized repair the
service contract will be cancelled. Damage by im-

proper use or mishandling is not covered by the
service contract.

original purchaser. To protect you from
misrepresentation this contract cannot be transfer­red to a second owner.

Canada are not covered by the Mclntosh Factory
Service Contract, irrespective of the place of pur­chase. Nor are units acquired outside the USA and
Canada, the purchasers of which should consult
with their dealer to ascertain what, if any, service
contract or warranty may be available locally.

with

this manual.

2

The Mclntosh infrared Remote Control System pro-

vides unusual versatility with operating simplicity. It

is a system which provides remote control in one
listening area yet can be expanded to provide in­dividual source selection with independent volume
settings in up to five additional areas. In each of
these areas, when connected to a Mclntosh tuner,
designed to connect to the infrared remote control
system, and a Mclntosh compact disc player:

1) you can turn on the AC power to the local area
or turn off the AC power for the local area only
or for all areas;

2) you can select the listening sound source
(tuner, compact disc, or preamplifier) for the
local area while other areas can choose their
listening source independently;

3) you can adjust the volume in the local area and
not affect the volume in other areas;

4) when the tuner is the sound source, you can
select the stations you wish to hear on either
AM or FM and depending on the tuner, scan
the preset stations on either AM or FM or

search the entire AM or FM band;

5) When the compact disc player is the sound
source, you can put the CD player in the play
mode, shift to the next track or the proceeding
track on the disc or stop the play from the disc;

or

6) you can select the preamplifier as a program
source with all of its connected sources.

To illustrate the control versatility of the Mclntosh
infrared Remote Control System, with the hand-held
remote controller, you can turn on the AC power for

that equipment, which feeds program material to a

listening area, without turning on the AC power for
other areas. While you arc listening to a compact
disc in the main area, someone in another area can

turn on the AC power for their area and elect to

listen to FM. When you are through listening in your

area, you can turn off the AC power to your area
while the listener in the other area continues to

listen to the tuner. Each area can adjust their own

volume without affecting the other areas volume. In

addition, the AC power to all areas can be turned off
by a hand-held controller in any area.

Your listening commands are executed by pressing
the selected buttons on the hand-held remote con­troller. When you press a button the controller
transmits, via an infrared beam, a twelve bit com­mand signal. The receiver for these signals is an in­frared sensor on the front of the CR 7 remote con­trol

module

Remote sensors are designed to be installed in an
electrical switch box for in wall or ceiling installation.
Ordinary video distribution cable, RG-59/U, connects
the remote sensor to the Mclntosh infrared Control
Modules.

The CR8 contains the interconnecting circuits, the
remote station data decoder and switch facilities for
a second or remote area. The only front panel in­dicator is a red LED which lights when the remote
area AC power is turned on.

or the

Mclntosh

R607

Remote

Sensor.

INTRODUCTION 3

The touch-buttons on the black anodized aluminum
front pane! of the CR7 control AC power to the local
area, source selection, system mute and volume. In
the upper right is an infrared sensor which receives
the control data transmitted by the hand-held remote
controller. In addition to the touch-buttons on the
CR7, these functions and more, can be initiated by
the hand-held remote controller.

POWER

The red POWER touch-button on the CR7 and the

POWER button on the remote control turn the AC
power on or off to the local area. When AC power is

turned on, the system switches automatically to the

tuner, with volume set to 40 dB below full volume.
The station heard will be the last one tuned when the
system was turned off. A green LED above the TUNER
touch-button will light. AC power to the local area is
turned off when the POWER button on either the

hand-held controller or the CR7 is pressed. To turn
off AC power in all areas first turn off the AC power

locally by pressing POWER followed by pressing both

VOLUME and VOLUME simultaneously.

SOURCE SELECTION

To listen to the compact disc player, the tuner or
the preamplifier, touch the corresponding button on
the front panel or on the hand-held remote con-

troller. A green LED above the touch-button will light
to indicate the source selected.

MUTE

Should you desire to silence the system briefly,

touch the MUTE button on either the CR7 or the

remote control. A red LED above the MUTE button

will light, and the program will be silenced. To hear

the program again, touch the MUTE button a second

time. The red LED will go out and the program will

be heard.

VOLUME

Volume may be adjusted by using the VOLUME
or VOLUME buttons on the front panel or on the
remote control. Adjustment of the volume is perform­ed by an electronically switched, precision ladder at­tenuaior. The Mclntosh electronic precision ladder at­tenuator adjusts volume by C2 MOS transistor swit­ches that select the right combinations of highly ac­curate deposits of resistive material. The entire range
of volume adjustment is 68 dB in 2 dB increments.
Left and right tracking is controlled to a fraction of a
dB. Because the volume control doesn't have moving
parts, the volume adjustment cannot be misaligned.

Unlike ordinary voltage controlled electronic volume
controls, the Mclntosh precision ladder attenuator
supports the distortion-free, low-noise performance of
the Mclntosh products.

SENSOR

The infrared sensor is located above the VOLUME
buttons. When using the hand-held controller a red
LED in the center of the sensor will flash to indicate
receiving the transmission.

4 FRONT PANEL