2 Channel Amplifier
Contents
Before using
Important Safeguards
Features.......................
Supplied accessor>' ....
Instruction Manual
Precautions
.................
Facilities and connections
Rear panel facilities and connections
Connection diagram..............................
Front panel facilities and connections.
Operations
............................................
Thank you for purchasing the Onkyo 2 Channel
Amplifier.
Please read this manual thoroughly before making
connections and plugging in the unit.
Following the instructions in this manual will enable
you to obtain optimum performance and listening
enjoyment from your new 2 Channel Amplifier. Please
retain this nianual for future reference.
Appendix
Troubleshooting guide
Specifications ...................................Backco’
........................................
Features
Precautions
WIDE KANGE AMPLIFIER TECHNOLOGY (VVRAT)
WRAT virtually eliminates the adverse effects of cotinterelectromoiive force by:
1) applying an uncommonly low amount of NEB (negative feed
back),
2) using carefully selected, high-tolerance, wide range parts in all
critical sections, and
3) incorporating innovative circuit topology based upon decades
of high-end amplifier design experience — the final result is flat
response beyond 100 kHz.
AUTO POWER ON/OFF FUNCTION
You can turn on and off the M-282 via a signal input to the AUDIO
IN jacks or 12V TRIGGER IN jack.
AUDIO IN/OUT LINK FUNCTION
The signal inputs from the AUDIO IN jacks are output from the
AUDIO OUT jacks. When used as a 2 channel amplifier in a multi
room configuration, you can connect several M-282s to enjoy the
same source in several rooms.
1. Warranty Claim
You can find the serial number on the rear panel of this unit. In
case of warranty claim, please report this number.
2. Recording Copyright
Recording of copyrighted material for other than personal use is
illegal without permission of the copyright holder.
3. AC Fuse
The fuse is located inside the chassi.s and is not user-serviceable. If the
power does not come on, conttict your Onkyo authorized service sta
tion.
4. Care
From time to time you should wipe the front and rear panels and
the cabinet with a soft cloth. For heavier dirt, dampen a soft cloth
in a weak solution of mild detergent and water, wring it out dry,
and wipe off the dirt. Following this, dry immediately with a clean
cloth. Do not use rough material, thinner, alcohol or other chemi
cal solvents or cloths since these could damage the finish or re
move the panel lettering.
5. Power
WARNING
BEFORE PLUGGING IN THE UNIT FOR THE FIRST TIME,
READ THE FOLLOWING,SECTION CAREFULLY.
The voltage of the available power supply differs according to
country or region. Be sure that the power supply voltage of the
tirea where this unit will be used meets the required voltage (e.g.,
AC 120 V, 60 Hz) written on the rear panel.
Supplied accessory
Check that the following accessory is supplied with the M-282.
For Canadian models
For models hav ing a power cord with a polarized plug:
CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH
WIDE BLADE OF' PLUG TO WIDE SLOT, FULLY INSERT.
Modelé pour les Canadien
Sur les modèles dont la fiche est polarisée:
ATTENTION: POUR ÉVITER LES CHOCS ÉLECTRIQUES
INTRODUIRE LA LAME LA PLUS LARGE DE LA FICH'
DANS LA BORNE CORRESPONDANTE DE LA PRISE ES
POUSSER JUSQU’AU FOND.
Rear panel facilities and connections
Caution:
• Be sure to always refer to the instructions that came with the
component that you are connecting.
• Do not plug in the power cord until all connections have been
made.
• Do not make connections to input or output jacks while the
M-282 is turned on.
• Always turn the volume of the control amplifier or
preamplifier down before turning on the M-282.
• For input and output jacks, red connectors (marked R) are used
for the right channel and white connectors (marked L) are used
for the left channel.
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TRtGCEH —
Insert all plugs and connectors securely. Improper connections
can result in noise, poor performance, or damage to the
equipment. ^— Improper connection
ni
— Inserted completely
Do not bind audio connection cables with power cords and
speaker cables. Doing so may adversely affect the sound
quality.
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Use this GND terminal for connecting the ground (or earth) wire
of other component if humming noise is heard.
GND
AUDIO IN/OUT
These are the analog audio inputs and outputs. Use an RCA-type
audio connection cable to connect the output jacks of the device to
the AUDIO IN jacks on the M-282. When connecting a control
amplifier or preamplifier, connect the PRE OUT jacks to the
AUDIO IN jacks.
If you connect the AUDIO OUT jacks of the M-282 to the AUDIO
IN jacks of another M-282, the signal input at the AUDIO IN jacks
of the M-282 is also output from the AUDIO OUT jacks (Audio
In/Out Link Function).
If you set the TRIGGER switch to AUDIO, the power of the
connected M-282 turns on automatically when an audio signal is
supplied to the AUDIO IN jacks (Auto Power On/Off Function).
TRIGGER
Set this TRIGGER switch before turning on the M-282.
To turn on the M-282 with the isignal input from the 12V
TRIGGER IN jack, set the TRIGGER switch to 12V TRIGGER.
To turn on the M-282 with the signal input from the AUDIQ IN
jack, set the TRIGGER switch to AUDIO (Auto Power On/Off
Function). If you do not use Aulp Power Function, set the
TRIGGER switch to OFF.
12V TRIGGER IN
If the connected control amplifiers or preamplifiers have a 12V
TRIGGER output jack, use 1/8-inch 2P mini-jack cable to connect
the 12V TRIGGER IN jack on the M-282. This jack works on
between 5 to 12 volts DC. When the M-282 is in the standby state
and the TRIGGER switch is set to 12V TRIGGER, you can switch
the M-282 between the on and standby states with operations at the
control amplifier or preamplifier.
INPUT LEVEL
Turn this INPUT LEVEL control to adjust the input level of the
signal from the AUDIO IN jacks. Normally, set to MAX.
Note:
When a plug is connected to the 12V TRIGGER jack, be sure to
connect the analog output jacks (or PRE OUT jacks) of the device
to the AUDIO IN jacks of the M-282. Otherwise, no sound will be
produced.
•Rear panel facilities and connections
6
Connect the jacks on the speakers to the SPEAKERS terminals
using the speaker cables. These terminals are compatible with
banana plug connections.
• Do not connect any devices other than speakers to these
• Be sure not to mistake the positive and negative outputs or the
• Only connect speakers with an impedance of 6 ohms or higher.
SPEAKERS
Strip away 15 mm (Vs in.) of wire insulation.
Twist wire ends very tight.
Unscrew.
Insert wire.
Screw.
(Vj in.)
terminals.
left and right speakers. Doing so will result in an unnatural
sound space.
If a speaker with an impedance of less than 6 ohms is
connected, it may damage the M-282.
When you are using only one
speaker or when you wish to
listen to monaural (mono)
sound, a single speaker should
never be connected in parallel
to both the right and leftchannel terminals simultane
ously.
To prevent damage to cir
cuitry, never short-circuit the
positive (+) and negative (-)
speaker wire.
NO!
ZJ AC INLET
Plug the supplied power cord into this AC INLET and then into the
power outlet on the wall.
• Do not use a power cord other than the one supplied with the
M-282. The power cord supplied is designed for use with the
M-282 and should not be used with any other device.
• Never disconnect the power cord from the M-282 while the
other end is plugged into the wall outlet. Doing so may cause
an electric shock. Always connect by plugging into the wall
outlet last and disconnect by unplugging from the wall outlet
first.
Connection diagram
Since the many users will purchase the M-282 together with the
TX-DS787, here is an e.\planation of how to connect the M-282 to
theTX-DS787.
When connecting the M-282 to 2 channel control amplifier or
preamplifier, connect the AUDIO IN jacks of the M-282 to the
PRE OUT FRONT jacks of the control amplifier or preamplifier,
and connect the front speakers to the SPEAKERS terminals of the
M-282.
Front panel facilities and connections
m
After plugging in the power cord into the rear panel and wall
outlet, pressing this switch connects the M-282 to the AC mains.
The function of this switch differs depending on the setting of the
TRIGGER switch on the rear panel. Before turning on the power,
be sure to set the TRIGGER switch. Besides, before turning on the
power, make sure all cables are properly connected.
The TRIGGER switch is factory set to OFE.
When the TRIGGER switch is set to OFF
Pressing the POWER switch turns on the M-282. The STANDBY/
ON indicator lights orange after flashing red for 5 seconds.
Press the POWER switch again to turn off the M-282.
When the TRIGGER switch is set to 12V TRIGGER
If no signal is supplied to the 12V TRIGGER IN jack, pressing the
POWER switch enters the standby state and the STANDBY/ON
indicator lights red.
If 12V DC is supplied to the 12V TRIGGER IN jack, pressing the
POWER switch turns on the M-282 and the STANDBY/ON
indicator lights orange after flashing red for 5 seconds.
If the M-282 is in the standby state, the M-282 turns on
automatically when 12V DC is supplied to the 12V TRIGGER IN
jack.
When the signal input to the 12V TRIGGER IN jack is interrupted,
the indicator lights red and the M-282 enters standby state (Auto
Power On/Off Function).
Press the POWER switch to turn off the M-282.
POWER
When the TRIGGER switch is set to AUDIO
If no signal is supplied to the AUDIO IN jacks, pressing the
POWER switch enters the standby state and the STANDBY/ON
indicator lights red after flashing red for 5 seconds.
If an audio signal is supplied to the AUDIO IN jacks, pressing the
POWER switch turns on the M-282 and the STANDBY/ON
indicator lights orange after flashing red for 5 seconds.
If the M-282 is in the standby state, the M-282 turns on
automatically when an audio signal is supplied to the AUDIO IN
jacks.
When the signal input to the AUDIO IN jacks is not supplied for
more than 4 minutes, the indicator turns to red and the M-282
enters standby state (Auto Power On/Off Function).
Press the POWER switch to turn off the M-282.
Note:
You cannot use the Auto Power On Function when the power is
turned off. To use the Auto Power On Function, leave the M-282
in the standby state once the M-282 enters the standby state.
STANDBY/ON indicator
The STANDBY/ON indicator lights red when the M-282 is in the
standby state and lights orange when the M-282 is turned on.
Operations
Troubleshooting guide
To listen to music or view your favorite movies, follow the
operations below.
The procedures given below assume that the other system
components are already connected. (For example, that the source
components are already connected to the control amplifier or the
preamplifier.)
1. Lower the volume at the control amplifier or
preamplifier.
Lower the volume of the control amplifier or preamplifier to
the minimum so that when the M-282 is turned on, you do not
hear loud unwanted sounds.
2. Select the input on the control amplifier or
preamplifier.
Select the proper input on the control amplifier or
preamplifier.
3. Slowly increase the volume of the control
amplifier or preamplifier.
Now all that remains is to control the control amplifier or
preamplifier and the other connected system components to
enjoy your music or movies.
No power.
• The power cord is disconnected.
—♦ Connect the power cord.
• The setting of the TRIGGER switch is wrong.
—> Set the TRIGGER switch to the appropriate position.
• With the TRIGGER switch set to a position other than OFF,
the POWER switch is pressed again immediately after turning
the power off.
—» Be sure to leave more than 3 seconds before turning the
power on again.
Power turns on but no sound.
• Bad connections or wiring.
-> Check connections, speaker cables, etc.
• Amplifier protection circuitry has been activated.
—► Contact your Onkyo Service Center.
• The INPUT LEVEL control is set to MIN.
—* Turn the INPUT LEVEL control to adjust the input
level.
The ST.-\NDBY/ON indicator does not light when the POWER
switch is pre.ssed.
• Bad connections or wiring.
—* Check if the power cord is properly connected. If the
indicator still does not light, turn off the M-282,
disconnect the power cord, and contact your Onkyo
Service Center.
The Sr.-\NDBY/ON indicator flashes red for more than
7 seconds when the POWER switch is pressed,
• A malfunction.
—* Press the POWER switch to turn off the M-282. After
3 seconds, press the POWER switch again to turn on the
M-282. If the indicator still flashes, turn off the M-282,
disconnect the power cord, and contact your Onkyo
Service Center.
No sound from the speaker, or at very low volume.
• Bad connections or wiring.
-♦ Check connections, speaker cables, etc.
• The INPUT LEVEL control is set to MIN.
—* Turn the INPUT LEVEL control to adjust the input
level.
• The settings on the control amplifier or preamplifier are
wrong.
-+ Check the settings on the control amplifier or
preamplifier.
The left and right sounds are unbalanced or reversed.
• Bad connections or wiring.
-* Check connections, speaker cables, etc.
• The polarity of the speaker cable is wrong.
Check the polarity of the speaker cable.
Specifications
AMPLIFIER SECTION
Power Output;
Dynamic Power Output:
Total Harmonic Distortion:
IM Distortion:
Damping Factor;
Input Sensitivity and Impedance:
Output Level and Impedance:
Rated Speaker Impedance:
Frequency Response;
Signal-to-Noise Ratio:
100 Watts per channel min. RMS at
8 ohms, both channel driven from
20 to 20,000 Hz with no more than
0.08 % total harmonic distortion,
125 Watts per channel min. RMS at
6 ohms, both channel driven from
1 kHz with no more than 0.1 %
total harmonic distortion.
2 X 140 Watts at 8 ohms
0.08 % at rated power
0.08 % at rated power
100 at 8 ohms
1 V, 50 kohms
1 V, 10 kohms
6 ohms MIN
10 Hz - 100 kHz, ±1 dB
llOdB (IHFA, 0.5 V input)
GENERAL
Power Supply;
Power Consumption:
Dimensions (W x H x D):
AC 120 V, 60 Hz
2.5 A
435 x 145 X 316 mm
17-Vs" X 5-‘7i6" X 12-Vi<
Weight:
8.5 kg, 18.7 lbs.
Specifications and features are subject to change without notice.
ONKYO CORPORATION
Sales & Product Planning Div.: 2-1, Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPAN
Tel: 072-831-8111 Fax:072-833-5222
ONKYO U.S.A. CORPORATION
200 Williams Drive, Ramsey, N.J. 07446, U.S.A.
Tel: 201-825-7950 Fax:201-825-8150 E-mail: onkyo@onkyousa.com
ONKYO EUROPE ELECTRONICS GmbH
Industriestrasse 20, 82110 Germering, GERMANY
Tel: 089-849-320 Fax: 089-849-3265 E-mail: info@onkyo.de
ONKYO CHINA LIMITED
Units 2102-2107, Metroplaza Tower 1, 223 Hing Fong Road, Kwai Chung,
WT HONR KONG TrI:852-2429-311S Pax: 852-2428-9039
I HOMEPAGE I
http://www.onkyo.co.
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