Rotel RC-870 User manual

STEREO CONTROL AMPLIFIER RC-870
INTRODUCTION
We at Rotel want to thank vou for purchasing
our audk> product.
Rotel audio products are designed to use the
latest electronic technology, and they incorpo¬
rate our long experience as a specialist manufac¬
turer of audio equipment. We are confident
that you will find satisfaction in the high
quality sound and top performance, and that
you will find pleasure in the functional beauty
achieved through humarvengineerir>g concept.
Before starting operation, please read this
instruction manual thoroughly and acquaint
yourself with the proper mode of using the unit
and all its connections.
We hope you will enjoy top-notch performance
for many years to come.
BEFORE ENJOYMENT/
POWER SUPPLY
Follow the instructions below for maximum
safety:
1. Use a wall outlet for power supply
Be sure to connect the AC tine cord to a house¬
hold wall outlet. Be certain that the outlet
voltage matches the electrical rating of the unit,
found on the rear panel name plate.
2. Connecting and removirtg AC cord
Be sure to connect or disconnect the AC line
cord only after turning off the power switch to
prevent possible shock noise or damage to
the speakers.
3. Ventilate the unit well
Never block any ventilation holes at the top
and bottom of the unit. Be sure also to provide
ample ventilation space around the unit. Poor
ventilation may result in damage due to exces¬
sive heat.
4. Do not open the cabinet
In order to avoid electric shock or damage to
the component, never open the cabinet. If a
foreign object falls inside the unit by mistake,
turn the power off. disconnect the wall plug,
and consult a qualified electrician or your
dealer.
5. Irtttallation
Be sure to place the unit in a level artd flat place
where it is free from humidity, vibration, high
temperature and not exposed to direct sunlight.
Be careful not to place the unit in a highly
enclosed place such as near a wall or on a
bookshelf. A poor ventilation will cause unde¬
sirable effects to the unit.
6. Moving the unit
When transporting, remove the AC cord from
the wall outlet and all other connected cords on
the rear panel to prevent wire breakage arxi
short circuits.
7. If the unit gets wet
If the unit should get wet, immediately discon¬
nect the AC cord, and consult your dealer or a
qualified electrician.
8. Cleaning and maintenance
Do not use chemicals such as benzine or thin-
ners on the front panel. Always use a soft, dry
cloth to clean the unit.
9. O wr>er's manual
Keep the owner’s manual near the unit, arxl
record the serial number (found on the rear
panel) on the cover.
Caution (applicable to the U.S.A., Canada,
Hong Kong, arxl Southeast Asia): On the rear
panel of the RC-870 are two sets of AC outlet
through which power is supplied to audio
equipment (turntable. CD player, tuner, cas¬
sette deck, etc.) you use in conjunction with
the RC-870. Each AC outlet is the switched
type, turned on or off upon switching on or off
the power in the RC-870, and has rating of 200
watts maximum. Do not attempt to connect
equipment whose power consumption exceeds
the rating of these AC outlets. Never connect a
power amplifier to these AC outlets.
CONNECTING COMPONENTS
Connect all necessary audio components to the
rear panel of the unit, using RCA pin cords. See
the illustration for properly completed con¬
nections. When connecting RCA pm cords, be
sure that L (left) ar>d R (right) markings on
each component are matched correctly. Con¬
nect the grour>ding wire of the turntable to the
terminal marked GND on the amplifier.
Note: The unit is provided with two sets of
PHONO input terminals, labeled MM and MC
respectively. When using a turntable equipped
with a moving magnet (MM) type cartridge,
use the PHONO MM terminals. When u$ir>g a
turntable with an MC type cartridge, use the
PHONO MC termiruls.
If you have two turntables, one with an MM
type cartridge arKf the other with an MC type,
you may connect both units simultaneously.
(with Moving Magnet
Cartridge)
SWITCHES AND CONTROLS
(1) Power Button
Depress this button to turn on the power in the
unit. Press the button a second time to release
it arxJ to cut off the power.
(2) Power Indicator
Glows when power is turned on with the power
button.
(3) Headphone Jack
For private listening, plug your headphones
into this jack, which cuts off the sound from
speakers. The volume of the headphone sound
can be regulated with the volume control.
(4) Volume Control
Used to regulate the volume level. Turn clock¬
wise to increase the volume, and counter¬
clockwise to reduce it. This is a dual con¬
centric knob which permits either separate or
combined adjustment of both channels.
(5) Mode Selector
Used to selea the reproducing mode of the
stereo signal fed into the unit. STEREO posi¬
tion is for rtormal stereo reproduction, and
MONO position for morK)phonic reproduction.
When the selector is set to MUTE position,
output of the unit is cut off, and r>o sound will
be heard.
(6) Tape Monitor Selector
Used to listen to a signal supplied from the tap>e
deck. Set the selector to TAPE 1 position for
the signal from a tape deck connected to TAPE
1 terminals on the rear parcel, and set to TAPE
2 for the deck connected to TAPE 2 terminals.
When it is set to the > 2 ” position, you can
perform tape-to-tape copying from the TAPE 1

to the TAPE 2 deck. Likewise, the "2 ► V’
position permits copying from the TAPE 2 to
the TAPE 1 deck.
Be sure to set this selector to OFF when listen¬
ing to a source selected by the Input selector.
(7) Input Selector
Selects input signal fed through the component
conr>ected to PHONO MM, PHONO MC,
TUNER, and CD terminals on the rear panel.
Set it to the appropriate position according to
the source you desire. Note that this selector is
operable when the Tape Monitor selector is set
to the OFF position.
OPERATION
• Before comnrMncing operation, check to
see if all connections are properly made.
• Always be sure to set the volume control
to the minimum position before turnirtg on
power.
Listening from turntable
1. Set Tape Monitor selector to OFF.
2. Set Input selector to MM position for a
turntable connected to PHONO MM terminals,
and to MC position for a turntable connected
to PHONO MC terminals.
3. Start playing turntable, arid raise the
volume to the desired level.
Listening from compact disc player or
tuner
1. Set Tape Monitor selector to OFF.
2. To listen to a compact disc, set the
Input selector to the CD position; set it to the
TUNER position to listen to radio broadcasts.
3. Play the compact disc or tune in to the
desired station, according to instructions given
for the equipment.
4. Raise the volume to the desired level.
Playing back tape deck
1. Set Tape Monitor selector to TAPE 1 or
TAPE 2 position according to the tape deck
you are going to play back.
2. Start playback.
3. Raise the volume to the desired level.
Recording program source
Play the desired program source according to
the procedures mentioned above. The signal
from the source will be sent through TAPE
MONITOR OUT terminals on unit's rear panel.
Put the tape deck in the record mode to record
the sigr^l. During recording, operation of
Volume control, and Mode selector will have
no effect on the sigr>ai beirvg sent through
TAPE MONITOR OUT terminals.
Dubbing
By connectirtg two tape decks. dubbir>g (tape-
to-tape copying) of prerecorded tapes can be
performed. The unit allows two modes of dub¬
bing: from TAPE 1 to TAPE 2 deck, and TAPE
2 to TAPE 1 deck.
1. Set Tape Monitor selector to "1 ► 2" or
■ '2P-1".
2. Play back TAPE 1 (or TAPE 2) deck,
and put TAPE 2 (or TAPE 1) deck in record
mode, then dubbing starts. During this oper¬
ation, you can listen to the sigrtal with Volume
control or Mode selector set as desired; they
have no effect on the signal to be recorded.
2
HUM AND NOISE
In any high fidelity installation, hum may be
caused by the interconnection of a turntable,
tuner and amplifier, and speakers as the result
of wiring, different grounding or location of
components.
Before commencing operation, be absolutely
sure that connection between each component
is properly made, and each RCA pin jack is
securely inserted.
Since noise from fluorescent lamps or thermo¬
stats may be picked up. the location of the
audio system should be carefully selected. In
case you cannot locate the cause of noise,
consult your dealer.
PROTECTION CIRCUIT
The unit incorporates a protection relay circuit
to prevent a popping noise from being gener¬
ated upon turnir>g on the power. Upon turn-on,
no sound is produced for several seconds. This
is for the stabilization of the unit arxf is rK>t
an abnormal operation.
SPECIFICATIONS
VOLTAGE SELECTION
Not available for U.K., Canada and Scandinavia
The unit is a variable voltage equipment that
can run on 120V, 220V or 240V power supply.
Your unit should already be preset at the
proper voltage for use in your area. However, if
you move to an area where the power supply
voltage is different, consult your dealer.
Total Harmonic Distortion.No more than 0.004%
(20 to 20,000 Hz) CD/TUNER (Rated output)
Intarmodulation Distortion.No more than 0.004%
(60 Hz : 7 kHz - 4 :1) CD/ (Rated output)
TUNER
Output (Headphone).4 to 16 ohms
Input Sensitivity/Impedance:
PHONO (Mid).2.5 mV/47 kohms
PHONO (MC).350 <iV/150 ohms
CD.450 mV/15 kohms
TUNER, TAPE MONITOR . . .150 mV/33 kohms
Output Sensitivity/lmpedance. . . .1.0 V/1.2 kohms
Overload Level (T.H.D. 0.5%. 1 kHz);
PHONO (MM).150 mV
PHONO (MC).20 mV
CD, TUNER, TAPE.5V
Frequency Response:
PHONO.40 to 100,000 Hz, t0.2dB (RIAASTD)
CD, TUNER, TAPE.. .4 to 100,000 Hz, +0dB, -3dB
Signal'tO'Noise Ratio (IHF, A network):
PHONO (MM).7BdB
PHONO (MC).64 dB
CD, TUNER, TAPE.95 dB
Power Consumption.20 watts
Dimensions (overall).430 (W) x 66 (H) x 317 (D) mm
16-5/16” X 2-19/32" x 12-15/32"
Weight (net).5.2 k9/11.44lbs.
• Specifications and design subject to possible modification without
notice.