YAMAHA Power Amplifier Owner’s Manual

YAMAHA Power Amplifier Owner’s Manual

IMPORTANT SAFETY INSTRUCTIONS

CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER- SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The above warning is located on the rear of the unit

• Explanation of Graphical Symbols
  The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert you 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.
  The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and maintenance (servicing) instructions in the
  literature accompanying the appliance.

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10 Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11 Only use attachments/accessories specified by the manufacturer.

FCC INFORMATION (USA)

1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product.

2. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s supplied with this product MUST be used. Follow all
   installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the USA.

3. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class “B” digital devices. Compliance with these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interference with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the users manual, may cause interference harmful to the operation of other
   electronic devices. Compliance with FCC regulations does not guarantee that interference will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit “OFF” and “ON”, please try to eliminate the problem by using one of the following measures: Relocate either this product or the device that is being affected by the interference. Utilize power outlets that are on different branch (circuit breaker or fuse) circuits or install AC line filter/s. In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300 ohm ribbon lead, change the lead-in to coaxial type cable. If these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this type of product. If you can not locate the appropriate retailer, please contact Yamaha Corporation of America A/V Division, 6600 Orangethorpe Avenue, Buena Park, CA 90620, USA. The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries.

• This applies only to products distributed by YAMAHA CORPORATION OF AMERICA.

COMPLIANCE INFORMATION STATEMENT (Supplier’s declaration of conformity

procedure)

Responsible Party:                        Yamaha Corporation of America
Address:                                       6600 Orangethorpe Avenue, Buena Park, CA 90620
Telephone: 714-522-9011
Type of Equipment:                     Power Amplifier
Model Name:                               MX-A5200

This device complies with Part 15 of FCC Rules. Operation is subject to the following two conditions:

1. this device may not cause harmful interference, and
2. this device must accept any interference received including interference that may cause undesired operation.

The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries.

PRECAUTIONS

PLEASE READ CAREFULLY BEFORE USE. BE SURE TO FOLLOW THESE INSTRUCTIONS.
The precautions listed below are to prevent risk of harm to the user and others, as well as to prevent property damage, and to help the user use this unit properly and safely. Be sure to follow these instructions. After reading this manual, be sure to keep it in a safe place where it can be referenced at any time.

• Be sure to request inspections or repairs from the dealer where you purchased the unit or from qualified Yamaha service personnel.
• Yamaha cannot be held responsible for injury to you or damage of the products caused by improper use or modifications to the unit, or data that is lost or destroyed.
• This product is for ordinary homes. Do not use for applications requiring high reliability, such as managing lives, health care or high-value assets.

WARNING

This content indicates “risk of serious injury or death.” Power

supply/power cord

• Do not do anything that could damage the power cord.
  – Do not place it near a heater.
  – Do not bend it excessively or alter it.
  – Do not scratch it.
  – Do not place it under a heavy object. Using the power cord/adaptor with the core of the cord exposed could cause electric shocks or a fire.

• Do not touch the power plug or cord if there is a chance of lightning. Failure to observe this may cause electric shocks.

• Use this unit with the power supply voltage printed on it. Failure to connect to an appropriate AC outlet may cause a fire, electric shocks, or malfunctions.

• Be sure to use the power cord. Also, do not use the supplied power cord for other units. Failure to observe the above may cause a fire, burns, or malfunctions.

• Check the electric plug periodically and remove any dirt or dust which may have accumulated on it. Failure to observe this may cause a fire or electric shocks.

• When setting up the unit, make sure that the AC outlet you are using is easily accessible. If some trouble or malfunction occurs, immediately turn off the power switch and disconnect
  the plug from the AC outlet. Even when the power switch is turned off, as long as the power cord is not unplugged from the wall AC outlet, the unit will not be disconnected from the power source.

• If you hear thunder or suspect approaching lightning, quickly turn off the power switch and pull the power plug from the AC outlet. Failure to observe this may cause a fire or malfunctions.

• If not using the unit for long periods of time, be sure to pull the power plug from the AC outlet. Failure to observe this may cause a fire or malfunctions.

Do not disassemble

• Do not disassemble or modify this unit. Failure to observe this may cause a fire, electric shocks, injury, or malfunctions. If you notice any irregularities, be sure to request an
  inspection or repair from the dealer where you purchased the unit or from qualified Yamaha

Water warning

• Do not expose the unit to rain, use it near water or in damp or wet conditions, or place on it any containers (such as vases, bottles or glasses) containing liquids which might spill into
  any openings or places where water may drop. A liquid such as water getting into the unit may cause a fire, electric shocks, or malfunctions. If any liquid such as water seeps into the
  device, turn off the power immediately and unplug the power cord from the AC outlet. Then, request an inspection from the dealer where you purchased the unit or from qualified
  Yamaha service personnel.

• Never insert or remove an electric plug with wet hands. Do not handle this unit with wet hands. Failure to observe this may cause electric shocks or malfunctions.

Fire warning

• Do not place any burning items or open flames near the unit, since they may cause a fire.

Maintenance and care

• Do not use aerosols or spray-type chemicals that contain combustible gas for cleaning or lubrication. The combustible gas will remain inside the unit, which may cause explosion or
fire.

If you notice any abnormality

• If any of the following abnormalities occur, immediately turn off the power and disconnect the power plug. If any of the following abnormalities occur, immediately turn off any amplifiers and receivers.  The power cord/plug is damaged.
  – An unusual smell or smoke is emitted from the unit.
  – Foreign material gets into the interior of the unit.
  – There is a loss of sound during use.
  – There is a crack or damage in the unit. Continued use could cause electric shocks, a fire, or malfunctions. Immediately request an inspection or repair from the dealer where you purchased the unit or from qualified Yamaha service personnel.

• Be careful not to drop or apply strong impact to this unit. If you suspect the unit may have been damaged due to dropping or impact, immediately turn off the power and pull the powerplug from the AC outlet. Failure to observe this may cause electric shocks, a fire, or malfunctions. Immediately request an inspection from the dealer where you purchased the
  unit or from qualified Yamaha service personnel.

This content indicates “risk of injury.” Power supply/power cord

• Do not use an AC outlet where the power plug fits loosely when inserted. Failure to observe this may cause a fire, electric shocks, or burns.
• When removing the electric plug from the unit or an AC outlet, always hold the plug itself and not the cord. Pulling by the cord can damage it and cause electric shocks or a fire.
• Insert the power plug firmly all the way into the AC outlet. Using the unit when it is not plugged in sufficiently can cause dust to accumulate on the plug, causing a fire or burns.

Installation

• Do not place the unit in an unstable position where it might accidentally drop or fall over and cause injuries.

• Do not block this unit’s ventilation holes (cooling slits). This unit has ventilation holes on the top/side/bottom to prevent the internal temperature from becoming too high. Failure to
  observe this may trap heat inside the unit, causing a fire or malfunctions.

• When installing this unit:
  – Do not cover it with any cloth.
  – Do not install it on a carpet or rug.
  – Make sure the top surface faces up; do not install on its sides or upside down.
  – Do not use the device in a confined, poorly-ventilated location. Failure to observe the above may trap heat inside the unit, causing a fire or malfunctions.
  Ensure that there is adequate space around the unit: at least 30 cm (11-3/4 in) on top, 20 cm (7-7/8 in) on the sides, and 20 cm (7-7/8 in) on the rear.

• Do not install the unit in places where it may come into contact with corrosive gases or salt air. Doing so may result in malfunction.

• Avoid being near the unit during a disaster, such as an earthquake. Since the unit may turn over or fall and cause injury, quickly move away from the unit and go to a safe place.

• Before moving this unit, be sure to turn off the power switch and disconnect all connection cables. Failure to observe this may damage the cables or cause you or someone else to trip
  and fall.

• When transporting or moving the unit always use two or more people. Attempting to lift the unit by yourself may damage your back, result in other injury, or cause damage to the unit
  itself.

Hearing loss

• Do not use the unit/speakers for a long period of time at a high or uncomfortable volume level, since this can cause permanent hearing loss. If you experience any hearing loss or
  ringing in the ears, consult a physician.

• Before connecting the unit to other devices, turn off the power for all devices. Also, before turning the power of all devices on or off, make sure that all volume levels are set to the
  minimum. Failing to do so may result in hearing loss, electric shock, or device damage.

• When turning on the AC power in your audio system, always turn on the unit LAST, to avoid hearing loss and speaker damage. When turning the power off, the unit should be turned off
  FIRST for the same reason. Failure to observe the above may cause hearing impairment or speaker damage.

Maintenance

Remove the power plug from the AC outlet before cleaning the unit. Failure to observe this may cause electric shocks.

Handling caution

• Do not touch the surface having this label. Doing so may cause burns. The label on the device indicates that the surface to which the label is attached may become hot during operation.

• Do not insert your hand or fingers into the ventilation holes of this unit. Failure to observe this may cause injury.

• Do not insert foreign materials such as metal or paper into the ventilation holes of this unit. Failure to observe this may cause a fire, electric shocks, or malfunctions. If foreign material gets into the unit, immediately shut off the power and pull the power plug from the AC outlet and request an inspection from the dealer where you purchased the unit or from qualified
  Yamaha service personnel.

• Keep small parts out of the reach of infants. Your children may accidentally swallow them.

• Do not do the following:
  – put heavy items on top of the equipment.
  – place the equipment in a stack.
  – apply unreasonable force to buttons, switches, input/output terminals, etc.

• Avoid pulling the connected cables to prevent injuries or damage to the unit by causing it to fall.

Notice
Indicates points that you must observe in order to prevent product failure, damage or malfunction and data loss. Power supply/power cord

• If not using the unit for a long period of time, be sure to pull the power plug from the outlet. Even if the z (Standby/On) switch has been turned off, a minute current is still flowing.

Installation

• Do not use this unit in the vicinity of other electronic equipment, such as a TV, radio, or mobile phone. Failure to observe this may cause this unit or the TV or radio to produce noise.

• Do not use this unit in a location that is exposed to direct sunlight, that becomes extremely hot, such as near a heater, or extremely cold, or that is subject to excessive dust or vibration.
  Failure to observe this may cause the unit’s panel to become deformed, the internal components to malfunction, or for operation to become unstable.

• Install this unit as far away from other electronic equipment as possible. Digital signals from this unit may interfere with other electronic equipment.

Connections

• If connecting external units, be sure to thoroughly read the manual for each unit and connect them in accordance with the instructions. Failure to properly handle a unit in accordance with the instructions could cause malfunctions.

Handling

• Do not place vinyl, plastic, or rubber products on this unit. Failure to observe this may cause discoloration or deformation in the panel of this unit.
• If the ambient temperature changes drastically (such as during unit transportation or under rapid heating or cooling) and there is a chance condensation may have formed in the unit,
  leave the unit for several hours without turning on the power until it is completely dry before use. Using the unit while there is condensation can cause malfunctions.

Maintenance

• When cleaning the unit, use a dry, soft cloth. Using chemicals such as benzine or thinner, cleaning agents, or chemical scrubbing cloths can cause discoloration or deformation.

Information

About content in this manual

• The illustrations and screens in this manual are for instructional purposes only.
• The company names and product names in this manual are the trademarks or registered trademarks of their respective companies.
• Software may be revised and updated without prior notice.

Read the supplied booklet “Safety Brochure” before using the unit.

Install the unit in a well ventilated, cool, dry, clean place – away from direct sunlight, heat sources, vibration, dust, moisture, and/or cold. Allow ventilation space of at least 30 cm
(11-3/4”) on the top, 20 cm (7-7/8”) on the left and right, and 20 cm (7-7/8”) on the back of the unit.

Since the unit adopts bare metallic speaker terminals, make sure keeping enough space on the back of the unit. If the speaker terminals come into contact with metal parts of the AV rack,
etc., the unit will be shortened and damaged. Also, never touch the speaker terminals when the unit is powered on since it may cause an electrical shock.

The unit does not have volume controls. Make sure you connect a device with volume control (such as a pre-amplifier) to the unit. If you connect a device without volume control (such as a
CD player) directly to the unit, the volume may become excessively loud and result in damage to the unit or speakers.

Accessories

Check that the following accessories are supplied with the product.

• Power cable

*The supplied power cable varies depending on the region of purchase.

• System control cable
  

• Owner’s Manual

• Due to product improvements, specifications and appearance are subject to change without notice.

• indicates precautions for use of the unit and its feature limitations.

• indicates supplementary explanations for better use.

Features

High-quality power amplifier

■ High output/high audio-quality amplifier (150 W x 11 channels)
The unit provides an 11-channel power amplifier featuring a three-stage Darlington current feedback circuit, with a power supply that uses the same type of toroidal transformer used in
top-level hi-fi audio devices. The gold-plated speaker connectors are also of the highest quality, delivering high-grade sound.

■ Balance and unbalanced connections are supported Balanced (XLR) and unbalanced (RCA) input jacks are provided on all channels, and can be selected independently for each
channel. Balanced connections minimize the extraneous noise that can arise in the cable connection between the unit and the pre-amplifier, ensuring high- fidelity transmission of the audio
signal. Unbalanced connections utilize ground-sensing to achieve fidelity that is close to balanced transmission.

■ Chassis structure that maximizes the potential of the unit’s performance The chassis features a special structure that allows the full potential of the high-quality power amplifier’s potential to be revealed.

• Symmetrical power amplifier design
• Aluminum front panel and side panels
• Extremely stable feet utilizing the A.R.T. (Anti-Resonance Technology)

■ Freedom for speaker placement Since power amplifiers of the identical specification are provided for all 11 channels, you use the unit not only for constructing a home theater setup of up to 11 channels but also for multi-room systems or any other speaker configuration to meet your needs.

■ Support for bi-amp connections/ bridge connection and multi-speaker playback

The unit provides a channel selector function that lets you utilize bi-amp connections /bridge connection or multi-speaker connections without having to connect additional cables from your pre-amplifier. Output the CH.3 input signals from both the CH.3 and CH.4 speaker terminals to realize a high sound quality bi-amp drive, or bridge the front
speakers to enjoy high-powered sound. You can also output a CH.1 (monaural) input signal from the three speakers connected to CH.1, CH.2 (L) and CH.2 (R).

■ Switch the unit’s power from your pre-amplifier (trigger function) The unit can switch its own power status in synchronization with power switching operations on another device that
supports the trigger function, such as an AV pre-amplifier (TRIGGER IN). The input signal from the TRIGGER IN jack can also be output without change in a cascade connection to
switch the power of another device such as a Yamaha subwoofer (THROUGH OUT). In addition, another device can be switched in synchronization when the power of the unit is switched (TRIGGER OUT), allowing you to set up a variety of systems with synchronized power switching.

Part names and functions

Front panel

1.  (power) key Turns on/off (standby) the unit (p.16).

2. Power indicator Lights up when the unit is turned on. If the indicator blinks, the protection circuitry has been activated. For details, see “Troubleshooting” (p.22).
   You can dim the power indicator (p.17).

3. SPEAKERS A/B keys
   Turns on /off the speakers connected to the CH.3 A/B terminals (p.20).
   

• Both the speakers (A and B) are turned off by default. Press the key to turn on the speakers you want to use.
• When using two pairs of the speakers connected to the CH.3 A/B terminals at the same time, be sure to use 8-ohm speakers and set IMPEDANCE SELECTOR to the upper position (p.15).

Rear panel

Caution

• Remove the unit’s power cable from an AC wall outlet before making any connections or operating the switches and/or selectors

1. 1SPEAKERS terminals
   For connecting to speakers (p.15).

2. TRIGGER jacks
   For connecting to devices that support the trigger function (p.18).

3. AUTO POWER STANDBY switch
   Enables/disables the auto-standby function (p.17).

4. IMPEDANCE SELECTOR
   Changes the unit’s speaker impedance setting depending on the speakers connected (p.15).

5. AC IN jack
   For connecting the supplied power cable (p.16).

6. CH. AMP ASSIGN
   (CH.2, CH.4 and CH.6 only) Selects the audio source input to the CH.2, CH.4 or CH.6 amplifier when applying a bi-amp connection and bridge connection (p.19)
   or a multi-speaker connection (p.20).

7. INPUT (XLR) jack
   For connecting to a pre-amplifier with XLR output jacks (p.14). To use the XLR jack, set the corresponding BAL/UNBAL switch to “BAL”. When connecting an XLR balanced cable, match the pins and insert the “male” connector of the cable until you hear a click.
   

8. 8INPUT (RCA) jack
   For connecting to a pre-amplifier with RCA output jacks (p.14). To use the RCA jack, set the corresponding BAL/UNBAL switch to “UNBAL”.
   

• When disconnecting the cable from the unit, hold down the PUSH button on the unit and then pull the connector out.

About the XLR jacks

• The pin assignments for the XLR jacks of the unit are shown below. Before connecting an XLR balanced cable, refer to the instruction manual of your pre-amplifier and verify that its XLR output jacks are compatible with the pin assignments
• Remove the RCA short pins attached to the INPUT (RCA) jacks before making connections. Be sure to keep them in a place inaccessible to small children who may accidentally swallow small parts.
• To protect against noise contamination, we recommend attaching the RCA short pins when the INPUT (RCA) jacks are not in use.

9 .BAL/UNBAL switch
Switches between XLR input and RCA input for each channel (p.14).

Connections

Caution

• Remove the unit’s power cable from an AC wall outlet before making any connections or operating the switches and/or selectors

Connect a pre-amplifier and speakers to the unit.

To connect a pre-amplifier, use an XLR balanced cable (for balanced connection) or an RCA unbalanced cable (for unbalanced connection) for each channel depending on the output jacks available on your pre-amplifier.

Connecting speakers

■ Note on the speaker impedance
The unit supports the following speaker impedance.

• CH.3 A/B: 4 or more (8 or more when using CH.3 A and CH.3 B at the same time)
• BRIDGE connection: 8 or more
•  Other channels: 6 or more Set the IMPEDANCE SELECTOR to the upper/lower position depending on the speakers connected to the unit.
  

Upper position

Select this option when your speaker system meets one of the followings.

• When connecting speakers with impedance of less than 8  (4  or more) to the CH.3 A or CH.3 B terminal
• When using two pairs of speakers connected to the CH.3 A/B terminals at the same time (be sure to use 8-ohm speakers for both CH.3 A and CH.3 B)
• When simultaneously using speakers of 8 Ω or more connected to both CH.3 A terminals and CH.4 terminals.
• When connecting speakers with impedance of less than 8  (6  or more) to speaker terminals other than CH.3 A or CH.3 B

Lower position (default)

■ Connecting speaker cables

Speaker cables have two wires. One is for connecting the negative (-) terminal of the unit and the speaker, and the other is for the positive (+) terminal. If the wires are colored to prevent confusion, connect the black wire to the negative and the other wire to the positive terminal.

1. Remove approximately 10 mm (0.40 in) of insulation from the ends of the speaker cable, and twist the bare wires of the cable firmly together.
2. Loosen the speaker terminal.
3. Insert the bare wires of the cable into the gap on the side (upper left or bottom right) of the terminal.
4. Tighten the terminal.

Using a banana plug (U.S.A., Canada, China, Taiwan and Australia models only)

1. Tighten the speaker terminal.
2. Insert a banana plug into the end of the terminal.
   

Using a Y-shaped lug connector

1. Loosen the speaker terminal.
2. Insert the Y-shaped lug connector into the groove between the knob and base part of the terminal.
3. Tighten the terminal.
   

Connecting the power cable

After all the connections and switch operations are complete, connect the supplied power cable to the unit and then to an AC wall outlet.

Turning on/off the unit

Press (power) to turn on/off the unit. When the unit is turned on, the power indicator lights up.

• When an external device is connected to the TRIGGER IN jack, the unit is set to standby mode after z(power) is pressed. If you turn on the external device, the unit automatically turns on by the trigger function (p.18).

Other functions

Turning off the unit automatically (auto-standby function)

The unit will automatically go into standby mode 8 hours after the unit is turned on. To disable the auto-standby function, set the AUTO POWER STANDBY switch to “OFF”.

• The auto-standby function works even if playback is ongoing.
• When the system control cable is connected to the TRIGGER IN jack, the auto-standby function does not work even if it is enabled.

Dimming the power indicator

You can dim the power indicator on the front panel of the unit.

• When an external device is connected to the TRIGGER IN jack, turn on it before performing the following procedure.

1. If the unit is turned on, press z (power) to turn off it.
2. Press z (power) three times within 3 seconds.
   The power indicator dims.

• To cancel the dimmer, perform the procedure again.
• If the power cable is unplugged, the dimmer will be canceled.

Turning on the unit in conjunction with operating other devices (trigger

function)

The trigger function can control power of the unit in conjunction with operating other devices or control power of other devices in conjunction with turning on/off the unit. If you have a power amplifier or a Yamaha subwoofer that supports the trigger function, you can use the trigger function by connecting your devices to the TRIGGER jacks with the supplied system control cable. Depending on the intended use, connect your device to one of the following TRIGGER jacks.

IN jack:

For connecting a device that supports the trigger output function (such as a pre-amplifier). If you turn on/off your device, the unit will automatically turns on/off (standby).

• This function is available only when z (power) of the unit is on (pressed down).

THROUGH OUT jack:

This jack outputs signals input from the IN jack. If you connect a device that supports the trigger input function (such as another power amplifier), your device will automatically turn on/off in conjunction with turning on/off the device connected to the IN jack.

OUT jack:

For connecting a device that supports the trigger input function (such as a subwoofer).
If you turn on/off (standby) the unit, your device will automatically turns on/off.

• To connect multiple devices to the TRIGGER jacks, you need to prepare commercially-available monaural mini-plug cables.

Advanced speaker configuration

Caution

• Remove the unit’s power cable from an AC wall outlet before making any connections or operating the switches.

Using a speaker that supports bi-amp connection

If you want to use a speaker that supports bi-amp connection to have more high-quality sounds, change the CH. SELECTOR setting and connect the speaker to the corresponding pair of the
SPEAKERS terminals.

(Example)

Using a speaker that supports bi-amp connection for CH.3 (R)

By setting the CH. SELECTOR for CH.4 (R) to “CH.3”, CH.3 (R) input signals are output from both the CH.3 A (R) and CH.4 (R) speaker terminals. In this case, CH.4 (R) input is not used.

Caution

• Before making bi-amp connections, remove any brackets or cables that connect a woofer with a tweeter. Refer to the instruction manual of the speakers for details. If you are not making bi-amp connections, make sure that the brackets or cables are connected before connecting the speaker cables.

Making a Bridge Connection Between the Front Speakers

You can enjoy high-powered sound by bridging the front speakers. To make a bridge connection, set the CH. SELECTOR for CH.4 (L/R) to “CH 3 BRIDGE”, and then
connect speakers to the CH.3 A (L/R) and CH.4 (L/R) speaker terminals.

Caution

• When using a bridge connection, the +/- terminals of CH.3 B as well as the – terminals of CH.3 A and CH.4
  cannot be used.

Using two pairs of front speakers (SPEAKERS A/B)

If you connect two pairs of front speakers to the CH.3 A/B terminals, you can switch the front speakers to be used by pressing SPEAKERS A/B on the front panel of the unit.

• When using two pairs of the speakers connected to the CH.3 A/B terminals at the same time, be sure to use 8-ohm
  speakers and set IMPEDANCE SELECTOR to the upper position (p.15).
  

Using three speakers for one channel (multi-speaker)

If you want to use three speakers for reproducing CH.1 audio signals (such as center channel signals), change the CH. SELECTOR setting and connect the speakers to the CH.1 and CH.2 (L/R) terminals.

Input-output signal path diagram

Troubleshooting

Refer to the table below when the unit does not function properly. If the problem you are experiencing is not listed below or if the instructions below do not help, turn off the unit, disconnect the power cable, and contact the nearest authorized Yamaha dealer or service center.

First, check the followings:

1. The power cables of the unit and other devices (such as a pre-amplifier) are connected to AC wall outlets securely.
2. The unit and other devices (such as a pre-amplifier) are turned on.
3. The connectors of each cable are securely inserted in to jacks on each device.

Problem

|

Cause

|

Remedy

---|---|---
  The power does not turn on.|   The protection circuitry has been activated three times consecutively. When the unit is in this condition, the power indicator on the unit blinks.| As a safety precaution, capability to turn on the power is disabled. Contact your nearest
Yamaha dealer or service center to request repair.
  The internal microcomputer has frozen, due to an external electric shock
(such as lightning or excessive static electricity) or to a drop in the power
supply voltage.|   Disconnect the power cable from the AC wall outlet and plug it again.
  An external device is connected to the   TRIGGER (IN) jack.|   Press down z (power) on the unit and then   turn on the external device.
The power turns off (standby mode) immediately.|   The unit was turned on while a speaker cable was shorted.|   Twist the bare wires of each speaker cable firmly and reconnect to the unit and speakers
(p.15).
  The unit was shorted because the speaker terminals come into contact
with metal parts of the AV rack, etc.|   Keep enough space on the back of the unit (p.8).
  The unit enters standby mode     automatically.|   The auto-standby function worked.|   To disable the auto-standby function, set the AUTO POWER STANDBY switch to “OFF” (p.17).
  The protection circuitry has been activated because the volume of the
external device connected to the unit is too high.|   Turn down the volume of the external device.
  The protection circuitry has been activated   because the temperature
inside of the unit is too high.|   Install the unit in a well ventilated, place   and allow enough ventilation space around   the unit (p.8).
  No sound.|   The BAL/UNBAL switch setting is not   correct.|   Change the BAL/UNBAL switch setting so that it matches the connections (p.14).
  No sound is coming from a specific speaker.|   The speakers connected to the CH.3 A/B terminals are turned off.|   Press SPEAKERS A/B to turn on the speakers (p.20).
  The XLR balanced cable (or RCA unbalanced cable) connecting the unit
and pre-amplifier is defective, or the speaker cable connecting the unit
and speaker is defective.|   If there is no problem with the connection, replace with another cable.
  Another channel sound is coming from a     specific speaker.|   The CH SELECTOR setting is not correct.|   Change the CH SELECTOR setting so that it matches your speaker system (p.19).

• Dimensions (W x H x D)
  .435 x 211 x 464 mm (17-1/8” x 8-1/4” x 18-1/4”)
• Including legs and protrusions
  • Weight  26.4 kg (58.2 lbs)
• Specifications are subject to change without notice.

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