McIntosh | C712 | Operating instructions | McIntosh C712 Operating instructions

McIntosh C712 Operating instructions
C712
SYSTEM
CONTROL
CENTER
C712
SYSTEM
CONTROL
CENTER
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 owner's 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. Nonuse Periods - Unplug the power cord from the AC power outlet when left
unused for a long period of time.
14. 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.
15. Servicing - Do not attempt to service beyond that described in the operating
instructions. All other service should be referred to qualified service personnel.
16. Grounding or Polarization - Do not defeat the inherent design features of the
polarized plug. Non-polarized line cord adapters will defeat the safety provided by
the polarized AC plug.
Copyright© 1997 by
Mclntosh Laboratory, Inc.
2
17. CAUTION: TO PREVENT ELECTRICAL SHOCK DO NOT USE THIS
IMPORTANT
SAFETY
INSTRUCTIONS
(POLARIZED) PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER
OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT
BLADE EXPOSURE.
ATTENTION: POUR PEVENIR LES CHOCS ELECRIQUES PAS UTILISER
THESE
INSTRUCTIONS
ARE TO
PROTECT
YOU AND THE
MclNTOSH
INSTRUMENT. BE
SURE TO
FAMILIARIZE
YOURSELF WITH
THEM.
CETTEFICHE POLARISEE AVEC UN PROLONGATEUR, UNE PRISE DE
COURANT OU UNE AUTRE SORTIE DE COURANT, SAUF SI LES LAMES
PEUVENT ETRE INSEREES A FOND SANS EN LAISSER AUCUNE PARTIE A
DECOUVERT.
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-SERVICEABLE 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) instructions in the literature accompanying the appliance.
WARNING: THIS UNIT IS CAPABLE OF PRODUCING HIGH
SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO
HIGH SOUND PRESSURE LEVELS CAN CAUSE
PERMANENT HEARING IMPAIRMENT OR LOSS. USER
CAUTION IS ADVISED AND EAR PROTECTION IS
RECOMMENDED WHEN PLAYING AT HIGH VOLUMES.
LIGHTNING - For added protection for this product during a lightning storm, or when
it is left unattended and unused for long periods of time, unplug it from the wall outlet
and disconnect the antenna or cable system. This will prevent damage to the
product due to lightning or power line surges.
OVERLOADING - Do not overload wall outlets, extension cords or integral
convenience receptacles as this can result in a risk of fire or electric shock.
REPLACEMENT PARTS - When replacement parts are required, be sure the service
technician has used replacement parts specified by the manufacturer or have the
same characteristics as the original part. Unauthorized substitutions may result in
fire, electric shock, or other hazards.
SAFETY CHECK - Upon completion of any service or repairs to this product, ask the
service technician to perform safety checks to determine that the product is in proper
operating condition.
3
THANK
YOU
Your decision to own this piece of Mclntosh Stereo Equipment ranks you at the
very top among discriminating music listeners. You now have "The Best". The
Mclntosh dedication to "Quality", is assurance that you will receive thousands of
years of musical enjoyment from this unit.
Please take a short time to read the information in this manual. We want you to be
as familiar as possible with all the features and functions of your new piece of
Mclntosh. This will ensure that you receive all the performance benefits this
instrument can offer you, and that it will become a highly valued part of your home
music system.
The serial number and purchase date are important to you for possible insurance
claim or future service. Record this information here.
Serial Number
TABLE OF
CONTENTS
Purchase Date
INTRODUCTION
HOW TO INSTALL THE C712
FRONT PANEL CONTROLS, SWITCHES AND PUSHBUTTONS
REAR PANEL AND HOW TO MAKE CONNECTIONS
C712 HAND HELD REMOTE CONTROLLER
5
5,6
6, 7
7 -10
10-12
SPECIFICATIONS
12
CUSTOM INSTALLATION DRAWING
13
FOLD OUT DRAWINGS OF FRONT AND BACK PANEL.........
14
4
Mclntosh has earned world renown for its technical contributions to improved sound
reproduction. When you bought Mclntosh, you bought not only high technology, but also
technological integrity proven by time. The Mclntosh C712 System Control Center is another
example of Mclntosh engineering excellence.
Mclntosh audio products are always designed for the best sound and superior reliability.
Dedication to achieving these goals since 1949, has earned Mclntosh the reputation for
creating the finest quality products in the stereo industry. The Mclntosh "Classic" design
has also been recognized as the most outstanding in the industry.
Mclntosh products are designed to be maximum user friendly so anyone can enjoy using
them. Another Mclntosh design policy is to provide products that are easy to maintain.
The C712 System Control Center is simple, yet elegant. There are many useful features
to enhance your listening enjoyment. The C712 is fully remote controlled and all operating
functions can be performed at the front panel, from the Hand Held Remote Controller or from
a wall mounted Keypad.
There are seven pairs of high level inputs to accommodate the traditional program sources
as well as the most recent new sources. These include CD players, audio signals from laser
disc players and audio from video recorders. A PHONO input is also provided for a record
player with a magnetic phono cartridge. If the PHONO is not used, the AUX input can accommodate another high-level program source.
DIGITAL LOGIC integrated circuits drive ELECTROMAGNETIC SWITCHES on all inputs and
operating functions for the most reliable, lowest distortion switching available today.
Two TAPE MONITOR switches allow the use of two separate tape recorders. Two TAPE COPY
switches are also provided for easy tape copying from one recorder to the other. A continuously
variable Active Loudness control allows loudness compensation to be selected for any setting of the volume control. The Loudness control circuit elements are removed from the signal
path when the control is in the flat or fully counterclockwise position.
Bass and Treble tone controls provide 12dB of boost or cut. At the center or detent position
of the tone controls, all tone control circuits are removed from the signal path. Other features
include a front panel Headphone output, a Mono switch and rear panel Signal Processor Loop
connections that affect the main outputs. Power supply voltage regulator circuits maintain
stable operation even though the AC power line may vary. A double shielded power transformer
completely isolates it from the audio circuits.
A pair of Balanced Outputs is also included to take advantage of the greater noise reduction capabilities of balanced cables.
The C712 can be placed upright on a table or shelf, standing on its own plastic feet. It
also can be installed in an optional Mclntosh L70 equipment cabinet. Follow the mounting
instructions enclosed with the L70 cabinet.
The C712 also can be custom installed in a piece of furniture or cabinet of your choice.
The required panel cutout and unit dimensions are shown on a page further back in this manual.
Always provide adequate ventilation for your C712, even though it develops very little heat.
Cool operation insures the longest possible operating life for any electronic instrument. Do
not install your C712 directly above a heat generating component such as a high powered
amplifier. In a system stack, the power amplifier should always be at the top. If all the comonents are installed in a single cabinet, a quiet running ventilation fan can be a definite asset
5
INTRODUCTION
HOW TO
INSTALL
THE C712
HOW TO
INSTALL
THE C712
FRONT PANEL
CONTROLS,
SWITCHES
AND
PUSHBUTTONS
in maintaining all the system components at the coolest possible operating temperatures.
A custom cabinet installation should provide the following recommended minimum spacing dimensions for cool operation. Allow at least 1-1/2 inches (3.8cm) above the unit so airflow
is not obstructed. Allow 17-1/2 inches (44.5cm) depth behind the mounting panel, which includes clearance for connectors. Allow 1-1/8 inches (2.9cm) in front of the mounting panel
for knob clearance.
The last page of this manual folds out to show photographs of the front and rear
panels of the C712. This will help you in identifying and locating the controls and
switches on the C712 front panel, and the connectors on the rear panel. The letters
and numbers on the photographs refer to the paragraphs that follow.
A. INPUT
Selects the program source that feeds the MAIN BALANCED, UNBALANCED, TAPE 1 and
TAPE 2 OUTPUTS.
B. BASS and TREBLE
Provide 12dB Boost or Cut with flat response at the center detent position. All tone control
circuit elements are removed from the signal path in the center flat position.
C. BALANCE
The BALANCE control adjusts the volume of the channels relative to each other.
L, (left): Turn the control to the left to accent the left channel by reducing the volume of
the right channel.
R, (right): Turn the right to accent the right channel by reducing the volume in the left channel.
D. LOUDNESS
The LOUDNESS control provides frequency response contoured to compensate for the
behavior of the human ear at softer listening levels. At the fully counterclockwise detent position, the frequency response is perfectly flat and the loudness circuit components are removed
from the signal path. Turn the control clockwise to increase frequency compensation in the
correct proportion for proper listening at softer volume levels. The compensated frequency
response is not affected by changes in the volume control settings. First adjust the volume
for the desired listening level, then adjust the loudness control to the setting you prefer.
E. IR SENSOR WINDOW
The IR (Infrared) sensor that accepts IR signals from the C712 Hand Held Remote Controller.
R VOLUME
Adjusts the Volume level from the MAIN BALANCED and UNBALANCED OUTPUTS. The
TAPE OUTPUTS are not affected by the VOLUME control.
G. MONO
Press the MONO pushbutton to add the left and right channel signals together for MONO
signals at the MAIN BALANCED and UNBALANCED OUTPUTS. A Red LED above the pushbutton will light to indicate the MONO mode of operation. The MONO pushbutton does not affect
the TAPE outputs. They are always stereo.
H. TAPE MONitor 1 and 2
Press TAPE MON 1 or 2 to listen to playback of tapes from either of two tape recorders.
6
You can listen to previously recorded tapes, or monitor tape from a three-head tape recorder
during the recording process. The TAPE MON pushbuttons operate independently from the
INPUT switch. A Red LED will light above either pushbutton to indicate which TAPE MON has
been selected.
I. HEADPHONES
Plug in a pair of low impedance dynamic headphones to this jack for headphone listening.
Press MUTE on the C712 Remote Controller to mute the main outputs to the power amplifier
to allow private headphone listening. MUTE does not affect the Headphones Output.
J. TAPE COPY, 1
2,2
FRONT PANEL
CONTROLS,
SWITCHES
AND
PUSHBUTTONS
1
Copy tapes from either of two tape recorders, to each other. The TAPE COPY pushbutton
switches operate independently from the INPUT switch. Use the TAPE MONitor switches to
monitor the output of the recorder playing the original tape, or the recorder making the copy.
A Red LED will light above either pushbutton to indicate which TAPE COPY mode is in use.
The TAPE COPY switches are electronically interconnected to prevent both circuits from
being activated at the same time. If you press one of the TAPE COPY switches to activate
a copy function, you must press the same TAPE COPY switch again before pressing the other
TAPE COPY switch.
K. POWER
Press the red POWER button to turn the C712 system ON. Press again to turn it OFF. The
rear panel SWITCHED AC Outlet turns on with the POWER switch.
Use good quality shielded cables to interconnect the associated equipment used with the
C712. The installation of high quality cables will insure the best possible performance from
your stereo system. Your Mclntosh dealer can advise you on the type and length of cables
best suited for your installation.
1. SWITCHED AC OUTLET
The SWITCHED AC outlet turns on and off with the front panel POWER Switch. Connect
a power amplifier or accessories to this outlet.
The total power capacity of the SWITCHED AC outlet must not exceed 1400 watts
or 11.6 amperes.
To expand the AC capacity of the SWITCHED outlet, add a Mclntosh R612A or PC2 Power
Controller.
2. L and R BALANCED OUTPUTS
Connect cables with XLR type Balanced Connectors from the C712, L (Left) and R (Right)
BALANCED OUTPUT jacks to the balanced input jacks of a stereo amplifier, or two mono amplifiers. Signals at the BALANCED jacks are the same signals as at the Unbalanced MAIN OUTPUTS.
Using balanced connectors and cables can reduce noise and interference by as much as
40dB. This extra noise reduction can be a significant improvement, especially if the cables
are quite long. If two separate mono power amplifiers are used with the C712, balanced cables
can eliminate the possibility of hum pickup. If cable lengths between the C712 and the power
amplifiers are one meter or less, you may find high quality unbalanced cables to be adequate.
Balanced Jack Pin Configuration:
Pin 1. System Ground
Pin 2. + Output
Pin 3. - Output
7
THE REAR PANEL
AND HOW
TO MAKE
CONNECTIONS
THE REAR PANEL
AND HOW
TO MAKE
CONNECTIONS
3.
MAIN OUTPUTS (Unbalanced)
Connect shielded cables from the C712 MAIN L and R OUTPUTS to the Left and Right
channel power amplifier inputs.
4. TAPE OUTPUTS 1 and 2
These outputs provide signals to feed two separate tape recorders. The program that appears at the tape outputs is determined by the setting of the front panel INPUT switch. The
TAPE COPY Switch also affects the signals at the tape outputs.
Connect a cable from the C712 Left channel TAPE 1 OUTPUT to the left channel high level
input of a tape recorder. Connect a cable from the C712 Right channel TAPE 1 OUTPUT to
the right channel high level input of the tape recorder. Connect a second tape recorder in
a similar manner, to the TAPE 2 OUTPUTS.
If more than one tape recorder is connected for both record and play, make certain
that the inputs and outputs of each recorder are connected to the same matching
numbered inputs and outputs.
5. PROCESSOR FROM and TO
An external signal processor can be added to the C712 that will affect only the MAIN and
BALANCED Outputs.
The PROCESSOR-FROM jacks have built-in switching contacts to allow normal signals to
pass through when no cables are connected. When an external processor is properly connected, the program signals feed to the processor from the PROCESSOR-TO jacks, and return
to the C712 at the PROCESSOR-FROM jacks.
Connect a cable from the left channel processor output to the C712 left channel
PROCESSOR-FROM jack. Connect a cable from the right channel signal output to the C712
right channel PROCESSOR-FROM jack.
Connect a cable from the C712 left channel PROCESSOR-TO jack to the signal processor
left channel input. Connect a cable from the C712 right channel PROCESSOR-TO jack to the
right channel signal processor input.
WHEN AN EXTERNAL SIGNAL PROCESSOR IS CONNECTED TO THE C712 PROCESSOR JACKS, THE PROCESSOR MUST BE TURNED ON AND OPERATING, OR IN
BYPASS MODE, FOR A PROGRAM TO BE HEARD THROUGH THE SYSTEM.
6. TAPES 1 and 2
Connect a cable from the left channel output of a tape recorder to the C712 L (Left) channel
TAPE 1 or 2 INPUT. Connect a cable from the right channel output to the corresponding R
(Right) TAPE 1 or 2 INPUT. Connect a second tape recorder in a similar manner.
The TAPE INPUTS can also be used for other accessory equipment with similar output levels.
IF MORE THAN ONE TAPE RECORDER IS CONNECTED TO BOTH RECORD AND PLAY,
MAKE CERTAIN THAT THE INPUTS AND OUTPUTS OF EACH RECORDER ARE CONNECTED TO THE SAME MATCHING NUMBERED INPUTS AND OUTPUTS.
7. VIDEO
Use these inputs for the audio signals from accessories such as a Laser Disc Player, VCR,
or TV receiver.
Connect a cable from the left channel audio output of the video unit to the C712 L (Left)
channel VIDEO INPUT. Connect a cable from the right channel audio output to the C712 R
(Right) VIDEO INPUT. Use the VIDEO input when an optional MVS-3 Audio/Video Switcher
8
is added to the C712 for the addition of video switching. The MVS-3 must also be connected
to the C712 VIDEO DATA PORT.
8. TUNER
Connect cables from the left and right channel outputs of a tuner to the C712 L (Left) and
R (Right) TUNER INPUTS.
9. CD1 and CD2
Connect a cable from the left channel output of a CD player to the C712 L (Left) CD1 INPUT. Connect a cable from the right channel output to the C712 R (Right) CD1 INPUT. Connect a second CD player to the C712 CD2 inputs in a similar manner.
For example, CD1 inputs could be used for a single play CD player, and the CD2 inputs
for a CD changer.
10. AUX (Auxiliary) / PH (Phono)
Both the PHono and Auxiliary input jacks are selected by the same position on the front
panel INPUT switch. One or the other pair of inputs can be used, but not both simultaneously.
Connect the left channel high level output of any audio accessory unit to the C712, L (Left)
Auxiliary INPUT. Connect the right channel accessory output to the C712, R (Right) Auxiliary
INPUT. When cables are connected to the AUX input jacks, the PHono circuit is automatically bypassed.
To connect a record player with a magnetic phono cartridge, FIRST, remove any connecting cables from the Auxiliary input jacks.
Connect a cable from the left channel turntable output to the C712 L (Left) PHono INPUT.
Connect a cable from the right channel to the C712 R (Right) PHono INPUT.
The C712 phono input circuit is designed to accept the signals from a standard moving
magnet phono cartridge.
11. AC POWER
Connect the AC Power cable to a live 120 volt 50/60Hz AC outlet.
The plug blades are polarized so be certain the plug is fully inserted in the outlet to
prevent blade exposure.
CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT CONNECT THE POLARIZED AC
PLUG ON THIS UNIT TO AN EXTENSION CORD OR OTHER AC OUTLET THAT IS NOT
DESIGNED TO ACCEPT POLARIZED PLUGS. THE PLUG MUST BE FULLY INSERTED
TO PREVENT BLADE EXPOSURE AND MAINTAIN LINE POLARITY.
12. EXTernal SENSOR
Connect a coaxial cable from the EXTernal SENSOR connector to an R649 Wall IR Sensor,
a WK-1 or WK-2 Keypad. This allows the C712 hand held remote controller to send control
signals to the C712 without aiming it at the C712 front panel. An example would be if the
C712 were installed behind a cabinet door that would block the front panel sensor.
13. TUNER CONTROL
Connect a Mclntosh W102 Tuner Control Cable from the TUNER CONTROL connector to
a connector on a compatible Mclntosh tuner such as the MR7083. This allows you to select
and control tuner operating functions with the C712 hand held remote controller transmitting
to a C712 IR sensor.
14. CD1/CD2 CONTROL
Connect a Mclntosh Model W101 CD control cable from the CD1 or CD2 CONTROL con-
9
THE REAR PANEL
AND HOW
TO MAKE
CONNECTIONS
THE REAR PANEL
AND HOW
TO MAKE
CONNECTIONS
C712 HAND HELD
REMOTE
CONTROLLER
nector to a matching connector on a Mclntosh CD player or changer. This allows you
to control CD player functions with the C712 remote controller transmitting to a C712
IR sensor. You could use CD1 for a single play CD player and CD2 for a CD changer.
15. POWER CONTROL
This connector supplies a 5 volt, DC Logic 1 control signal to feed to a similar Power
Control input on a compatible power amplifier or accessory. The POWER CONTROL
signal is used to turn the AC power of the accessory component on and off.
The POWER CONTROL connector uses single conductor shielded wire with 1/8
inch mini Phono plugs. Connections are to the top and sleeve of the plug.
16. DATA PORTS
The eight DATA PORTS provide data signals to be fed to compatible audio and
video accessories. This allows you to control the accessory components with their
own remote controllers transmitting to a C712 IR sensor.
The SUM DATA PORT can be used to connect to a Mclntosh RCT-2 Remote
Control Translator. Any IR signal transmitted to a C712 IR sensor results in data
signals at this port. The RCT-2 is a learning device that will allow the C712 to
remotely control most major brands of accessory components.
Use the VIDEO DATA PORT to connect to the MVS-3 Audio Video Switcher.
All cables connected from the data ports use shielded wire with 1/8" mini phone
plugs. Connections are to the sleeve and tip of the plug.
17. GND (Ground).
If there is a separate ground wire from the turntable, connect it to the GND terminal.
The descriptions and functions of the C712 Remote Controller pushbuttons refer to
the numbers on the drawing.
SPECIAL NOTE: The pushbuttons marked in black do not function with the
C712. They function only when this Remote Controller is used with another
Mclntosh model.
1. CD1, CD2, TUNER, PH/AUX AND VIDEO
Select input signals for CD1, CD2, TUNER, PHono/Aux or VIDEO.
2. LS/TM1,LS/TM2
Press LS/TM1, (TAPE MONITOR 1), or LS/TM2, (TAPE MONITOR 2) to listen to
playback of tapes from either of two tape recorders. You can listen to previously
recorded tapes, or monitor tape from a three head tape recorder during the
recording process. A Red LED will turn ON above the C712 front panel pushbutton
marked TAPE MON 1 or TAPE MON 2. to indicate which is selected. The TAPE
MONITOR inputs can also be used for any similar high level signal source such as a
tuner or CD player.
3. TV, LV, VCR1, VCR2 and V/AUX
Select additional Audio video program sources when the optional MVS-3
Audio/Video Selector is added to the C712. First press the VIDEO pushbutton and
then the desired pushbutton for any of the five sources that can be selected by the
MSV-3.
4. CD/TAPE
Select CD player, CD Changer or tape recorder functions.
10
Using a Mclntosh SINGLE DISC CD
PLAYER, STOP, BACK TRACK
NEXT
TRACK
and PLAY functions can be
performed.
Using a Mclntosh CD CHANGER, STOP,
BACK TRACK
NEXT TRACK
and
PLAY functions can be performed while a
disc is playing.
When the CD changer is in the STOP
position, BACK TRACK
selects the
SINGLE DISC and NEXT TRACK
selects
which of the other six discs you wish to play.
After pressing STOP, the first time you press
NEXT
disc number 1 is selected. Press
again as desired to select discs 2 through
6.
FOR EXAMPLE: To select disc number 6
from the single disc play mode, press
STOP and then NEXT
six times. To
select disc number 2, press STOP and then
press NEXT
twice. To select the disc in the SINGLE disc slot, press STOP and
then press BACK
once.
5. POWER
Press the POWER pushbutton to turn the C712 system on or off.
6. ACC OFF, ACC ON
The ACC (Accessory) On or OFF pushbuttons function when the optional RCT-2
Remote Control Translator is being used with the C712. They can be programmed to
turn the AC power of an accessory component on or off.
(Pushbuttons listed under Number 7 and Number 8 function when a
compatible Mclntosh Tuner is connected to the C712.)
7. 0 through 9
Press one of the numbered pushbuttons to select Tuner Station presets.
8. AM, FM, REVIEW and
SEEK
Select the Tuner functions AM, FM, REVIEW, SEEK UP or SEEK DOWN.
9. E
E (ENTER) is used with the optional RCT-2 Remote Control Translator to operate
accessory equipment.
10. MUTE
Press MUTE to mute all audio outputs except those for Headphones and Tape. A
Red LED above the front panel volume control turns ON to indicate that the outputs
are muted. Press MUTE a second time to restore normal operation.
11. VOLUME
Press (UP) VOLUME to raise the listening volume and
(DOWN) VOLUME to
lower the listening volume. The Tape Outputs are not affected by the remote
VOLUME pushbuttons.
C712 HAND HELD
REMOTE
CONTROLLER
11
C712 HAND HELD
REMOTE
CONTROLLER
SPECIFICATIONS
HOW TO INSTALL BATTERIES IN THE C712 HAND HELD REMOTE CONTROLLER
Slide open the battery compartment. Insert two type AAA batteries into the
compartment, making sure to observe the battery polarities indicated in the battery
compartment.
When the batteries are nearing exhaustion, the effective range of the remote
controller decreases, and MAY even fail to operate. In this case, replace both
batteries with fresh ones.
NOTE:
1. Do not mix old and new batteries. Use ONLY batteries that are new.
2. Make sure both batteries are of the same type and identical.
3. To prevent damage caused by possible battery leakage, remove the batteries from
the remote controller if it is not going to be used for an extended period of time.
4. Never dismantle batteries or dispose of them in a fire, as they may explode.
Dispose of old batteries in an approved method for proper safety.
FRQUENCY RESPONSE
+0, -0.5dB from 20Hz to 20,000Hz
RATED OUTPUT
2.5V at BALANCED and MAIN
(Unbalanced) OUTPUTS
MAXIMUM VOLTAGE OUTPUT
8V from 20Hz to 20,000Hz at
BALANCED and MAIN (Unbalanced)
OUTPUTS.
TOTAL HARMONIC DISTORTION
0.002% maximum from 20Hz to
20,000Hz at rated output.
SENSITIVITY
Phono: 2.5mV for 2.5V rated output,
(0.5mV IHF).
High Level: 250mV for 2.5V rated
output, (50mV IHF).
SIGNAL-TO-NOISE RATIO,
A-Weighted
Phono: 90dB below 10mV input, (84dB
IHF).
High Level: 105dB below rated output,
(95dB IHF).
MAXIMUM INPUT SIGNAL
Phono: 90mV
High Level: 10V
INPUT IMPEDANCE
Phono: 47K ohms and 65pF Capacitance
High Level: 22K ohms
12
VOLTAGE GAIN
Phono to Tape: 40dB
Phono to Main: 60dB
High Level to Tape: 0dB
High Level to Main: 20dB
TONE CONTROLS
Bass and Treble, variable 12dB boost
to 12dB cut.
AC POWER OUTLET
One Switched; Total current capacity
11.6 amperes, (1400 watts)
MECHANICAL
SIZE
Front Panel measures 17-1/2 inches
(44.5cm) wide by 3-5/8 inches (9.2cm)
high. Chassis depth behind the mounting
panel including clearance for connectors
is 17-1/2 inches (44.5cm). Knob
clearance required in front of mounting
panel is 1-1/8 inches (2.9cm).
FINISH
Front Panel is glass with gold/teal
nomenclature illumination. The chassis is
black.
WEIGHT
17 lbs. (7.7Kg) net, 29 Ibs. (13.2Kg) in
shipping carton.
CUSTOM
INSTALLATION
DRAWING
13
The letters and numbers correspond to the paragraphs on pages 7, 8, 9, and 10.
04050400
BE012003
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