Yamaha MX D1_U D1 Manual E1

User Manual: Yamaha MX-D1 Manual

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STEREO POWER AMPLIFIER

OWNER’S MANUAL

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CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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.

• 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.

IMPORTANT!

Please record the serial number of this unit in the space below.

Model:

Serial No.:

The serial number is located on the rear of the unit.

Retain this Owner’s Manual in a safe place for future reference.

1Read these instructions.

2Keep these instructions.

3Heed all warnings.

4Follow all instructions.

5Do not use this apparatus near water.

6Clean only with dry cloth.

7Do not block any ventilation openings. Install in accordance with the

manufacturer’s instructions.

8Do not install near any heat sources such as radiators, heat registers,

stoves, or other apparatus (including amplifiers) that produce heat.

9Do 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.

12 Use only with the cart, stand, tripod, bracket, or table

specified by the manufacturer, or sold with the

apparatus. When a cart is used, use caution when

moving the cart/apparatus combination to avoid

injury from tip-over.

13 Unplug this apparatus during lightning storms or when unused for

long periods of time.

14 Refer all servicing to qualified service personnel. Servicing is

required when the apparatus has been damaged in any way, such as

power-supply cord or plug is damaged, liquid has been spilled or

objects have fallen into the apparatus, the apparatus has been exposed

to rain or moisture, does not operate normally, or has been dropped.

CAUTION I

IMPORTANT SAFETY INSTRUCTIONS

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FCC INFORMATION (for US customers)

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

Electronics Corp., U.S.A. 6660 Orangethorpe Ave, Buena Park, CA

90620.

The above statements apply ONLY to those products distributed by

Yamaha Corporation of America or its subsidiaries.

We Want You Listening For A Lifetime

YAMAHA and the Electronic Industries Association’s Consumer Electronics Group want you to get the most out of your equipment by playing

it at a safe level. One that lets the sound come through loud and clear without annoying blaring or distortion – and, most importantly, without

affecting your sensitive hearing. Since hearing damage from loud sounds is often undetectable until it is too late, YAMAHA and the Electronic

Industries Association’s Consumer Electronics Group recommend you to avoid prolonged exposure from excessive volume levels.

CAUTION II

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• To assure the finest performance, please read this manual carefully.

Keep it in a safe place for future reference.

• Install this unit in a well ventilated, cool, dry, clean place – away from

direct sunlight, heat sources, vibration, dust, moisture, and/or cold.

Avoid ventilation space of at least 30 cm on the top, 20 cm on the left

and right, and 10 cm on the back of this unit.

• Locate this unit away from other electrical appliances, motors, or

transformers to avoid humming sounds.

• Do not expose this unit to sudden temperature changes from cold to hot,

and do not locate this unit in a environment with high humidity (i.e. a

room with a humidifier) to prevent condensation inside this unit, which

may cause an electrical shock, fire, damage to this unit, and/or personal

injury.

• Avoid installing this unit where foreign object may fall onto this unit

and/or this unit may be exposed to liquid dripping or splashing. On the

top of this unit, do not place:

• Other components, as they may cause damage and/or discoloration

on the surface of this unit.

• Burning objects (i.e. candles), as they may cause fire, damage to this

unit, and/or personal injury.

• Containers with liquid in them, as they may fall and liquid may

electrical shock to the user and/or damage to this unit.

• Do not cover the top panel of this unit with a newspaper, tablecloth,

curtain, etc. in order not to obstruct heat radiation. If the temperature

inside this unit rises, it may cause fire, damage to this unit, and/or

personal injury.

• Do not plug in this unit to a wall outlet until all connections are

complete.

• Do not operate this unit upside-down. It may overheat, possibly causing

damage.

• Do not use force on switches, knobs and/or cords.

• When disconnecting the power cord from the wall outlet, grasp the

plug; do not pull the cord.

• Do not clean this unit with chemical solvents; this might damage the

finish. Use a clean, dry cloth.

• Only voltage specified on this unit must be used. Using this unit with a

higher voltage than specified is dangerous and may cause fire, damage

to this unit, and/or personal injury. YAMAHA will not be held

responsible for any damage resulting from use of this unit with a

voltage other than specified.

• To prevent damage by lightning, disconnect the power cord from the

wall outlet during an electrical storm.

• Do not attempt to modify or fix this unit. Contact qualified YAMAHA

service personnel when any service is needed. The cabinet should never

be opened for any reasons.

• When not planning to use this unit for long periods of time (i.e.

vacation), disconnect the AC power plug from the wall outlet.

• Be sure to read the “TROUBLESHOOTING” section on common

operating errors before concluding that this unit is faulty.

• Before moving this unit, first check that there is no disc in the disc tray.

Finally, press the STANDBY/ON switch to turn off this unit, and

disconnect the AC power plug from the wall outlet.

SPECIAL INSTRUCTIONS FOR U.K. MODEL

For U.K. customers

If the socket outlets in the home are not suitable for the plug supplied with

this appliance, it should be cut off and an appropriate 3 pin plug fitted. For

details, refer to the instructions described above.

Note: The plug severed from the mains lead must be destroyed, as a plug

with bared flexible cord is hazardous if engaged in a live socket outlet.

his unit is not disconnected from the AC power source as long as it is

connected to the wall outlet, even if this unit itself is turned off. This

state is called standby mode. In this state, this unit is designed to con-

sume a very small quantity of power.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO

NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.

IMPORTANT

The wires in this mains lead are coloures in accordance with the

following code:

GREEN-and-YELLOW: Earth

BLUE: Neutral

BROWN: Live

As the colours of the wires in the mains lead of this apparatus may not

correspond with the coloured markings identifying the terminals in

your plug proceed as follows: The wire which is coloured GREEN-

and-YELLOW must be connected to the terminal in the plug which is

marked by the letter E or by the safety earth symbol or coloured

GREEN or GREEN-and -YELLOW. The wire which is coloured

BLUE must be connected to the terminal which is marked with the

letter N or coloured BLACK. The wire which is coloured BROWN

must be connected to the terminal which is marked with the letter L or

coloured RED.

For Canadian Customers

To prevent electric shock, match wide blade of plug to wide slot and

fully insert.

This Class B digital apparatus complies with Canadian ICES-003.

CAUTION: READ THIS BEFORE OPARATING THIS UNIT

CAUTION III

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FEATURES

FEATURES ............................................................................................................................................................................... 1

CONTROLS AND FUNCTIONS............................................................................................................................................. 2

CONNECTIONS....................................................................................................................................................................... 4

BLOCK DIAGRAMS ............................................................................................................................................................... 6

TROUBLESHOOTING ............................................................................................................................................................ 8

SPECIFICATIONS.................................................................................................................................................................... 9

• 500 W + 500 W max. (4 to 8 Ω) high-power, high-performance digital stereo power amp

• 120 dB dynamic range

• Yamaha-designed LSI chips used in the digital-modulation and power-drive circuits

• Active Power Control System ensures optimum performance under any load (4 to 8 Ω)

• Constant Gain PLL Modulator provides a fixed, open-loop gain that is unaffected by supply voltage fluctuations

• 0.003% THD (Total Harmonic Distortion)

• 100 dB channel separation

• Yamaha's own high-efficiency, low-noise resonant-type switching power supply

• WBT (German) connectors used for inputs (RCA/phono) and speaker outputs

• Futuristic, super-thin design

CONTENTS

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CONTROLS AND FUNCTIONS

Rear Panel

Front Panel

This mark indicates a dangerous electrically live terminal.

When connecting to this terminal, it is necessary either to have “a person

who have received appropriate guidance on handling” make the connection

or to use a cable that have been manufactured in such a way that the

connection can be made simply and without problem.

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1STANDBY/ON switch/indicator

This switch is used to set the MX-D1 to on or standby. A small amount of power is used in standby mode.

When the MX-D1 is turned on, this indicator lights blue and the MX-D1 is ready for use.

If a fault is detected, the MX-D1's protection system activates and this indicator lights red. If this happens,

set the MX-D1 to standby mode immediately.

2SPEAKER terminals

These terminals are for connecting your speakers.

They provide a reliable connection even with really

thick cables. Be sure to connect the left and right

channels, and the speaker polarities (+/-) correctly.

You can connect speakers with impedance of between

4 to 8 ohms.

3BALANCE jacks

If your source component has balanced XLR output

jacks, connect them to these jacks using XLR cables.

4UNBALANCE jacks

If your source component has unbalanced RCA/

phono jacks (labeled “AUDIO OUTPUT” on the

YPC-1), connect them to these jacks using an audio

pin cable.

5UNBAL/BAL switch

With this switch you can select the BALANCE jacks

or the UNBALANCE jacks.

6MUTE button

You can temporarily mute the output from the MX-D1

by holding down this button. If you need to change

any input connections while the MX-D1 is still on,

you can protect your speakers against sudden loud

noises, thumps, and clicks by keeping this button

pressed while making such changes.

7RS-232C terminal

This terminal is for servicing purposes only.

8AMP ID switch

This switch is for servicing purposes only.

9CONTROL IN jack

The MX-D1 can be turned on or off via this jack.

The control range is +3 to +30 volts.

0CONTROL OUT jack

When the MX-D1 is turned on, this jack outputs +12

volts. The maximum current is 15 mA.

wPOWER/THROUGH switch

This switch determines the operation of the

CONTROL IN/OUT jacks. When using the MX-D1

as the master component, set this switch to “POWER”.

When using it as a slave component, set it to

“THROUGH”.

eAC IN connector

Connect the supplied AC power cable here.

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CONNECTIONS

Pre-amplifier

CD player with a volume control

PA equipment

Balanced XLR output

To AC outlet

Speaker (R) Speaker (L)

Audio output

YPC-1

CD player

Ta pe deck

Tu n e r

etc.

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Speaker cables typically consist of two insulated conductors. To ensure that the speakers are connected with the correct

polarity (+/-), the insulation on one of the conductors is a different color or is marked with a line.

Preparing the speaker cables

1. Strip about 15 mm of insulation from the ends of the speaker cables.

2. Twist the bare wires tightly.

To prevent a short circuit, make sure the bare wires are twisted tightly.

Connecting the speaker cables

1. Unscrew the SPEAKER terminals.

2. Insert the twisted bare wires into the holes on the SPEAKER terminals.

3. Screw the SPEAKER terminals tight.

15mm

Red: + (positive)

White: - (negative)

Connecting Your Speakers

Connecting to the BALANCE jacks

Connect your component with the balanced XLR output jacks.

The pin assignments for these jacks are shown below. Refer to the owner’s manual of your component and verify that its

output jacks are compatible with the pin assignments for these jacks.

When connecting, match the pins and insert the connector of the XLR cable until you

hear a “click.”

When disconnecting, pull out the XLR cable while holding down the lever of the

BALANCE jack.

When using this balanced connection, set the UNBAL/BAL switch to “BAL.”

Connecting to the UNBALANCE jacks

Connect your component with the unbalanced RCA/phono output jacks.

When using this unbalanced connection, set the UNBAL/BAL switch to “UNBAL.”

Note that if you input signals to the BALANCE jacks and UNBALANCE jacks at the same, cross talk may occur between

these input jacks.

2: hot

1: ground

3: cold

Caution

Connecting Your Source Components

Plug the AC power cable into the AC IN connector when all connections are complete, and then plug in the AC power cable

to the AC outlet.

Connecting the AC Power Cable

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The MX-D1 is a high-power, high-performance PWM (Pulse Width Modulation) digital stereo power amp, utilizing Yamaha's

latest digital power amplifier and switching power supply technologies.

The following block diagrams show the amplifier and power supply circuits.

BLOCK DIAGRAMS

Power Supply Block Diagram

YDA133

SPOUT

YDA134

-B

Input amp

Active power

control

Output current information

Analog

feedback

Closed-loop

feedback

2.8 MHz

clock input

Constant-gain

PLL

modulator circuit

Real-time

protection

Real-time

protection

Protection

/mute

AC IN

88kHz 2.8MHz

(amp)

OSC

88kHz

100V(on)

200V(off)

-B

2.8MHz

(amp)

Line filter

Choke

Inrush

protection circuit

Sub-

transformer

Protection circuit Microcomputer

Isolator

Right-channel power supply

Driver

For op-amps

and LSI

Magnetically

-coupled

rectifier circuit

External interface

Amplifier Block Diagram

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PWM (Pulse Width Modulation), which theoretically produces zero quantization noise, a dynamic range that is dependent only on circuit technology, and

feedback all combine to make the MX-D1 a superb high-performance power amp.

In addition, the Yamaha high-performance, high-speed analog and digital LSI chips are designed to optimize the performance of the modulator and

MOSFET drive circuits that form the heart of the MX-D1.

Active power control system

By continuously monitoring the amp's output current and controlling the maximum continuous output power and

instantaneous dynamic power, the MX-D1 always delivers maximum performance with any load impedance between 2 to

8 ohms.

Constant-gain PLL modulator circuit

With a conventional digital power amp, the output is adversely affected by fluctuations in power supply voltage as the

current demands of the amp change. The MX-D1's modulation circuit, consisting of a PLL (Phase Locked Loop) and

modulation circuit, provides a radical solution to this problem.

In response to power supply voltage fluctuations, the constant-gain PLL modulator circuit produces a pulse-width

modulated waveform by modulating the input signal at a suitable rate. In this way, linearity is maintained and the open-

loop gain is fixed, providing stable feedback.

Feedback

Digital output pulses are fed back in a closed-loop feedback circuit, which improves the performance of the modulator

circuit and the linearity of the output stage, providing very low distortion and a wide dynamic range.

In addition, an analog output signal taken from after the LC output filter is fed back to ensure a high damping factor and a

wide frequency response that is unaffected by the load impedance.

Protection system

The protection system, which guarantees safe operation, includes a super-fast current detection circuit that can measure

the current of a single pulse. It also includes safe operating sequential logic, DC detection, and over-current protection.

Switching power supply

Independent, high-efficiency, low noise resonant-type switching power supplies, developed by Yamaha, are used for the

left and right channels.

In addition, the secondary rectifier circuit has a magnetically coupled rectifier, which resolves issues normally associated

with conventional SEPP (single-ended push-pull) digital amps and allows the MX-D1 to always maintain perfect

symmetry between the positive and negative power supply rails regardless of the direction of the output current.

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TROUBLESHOOTING

If your MX-D1 does not appear to be working properly, look up the symptoms in the following table. If the symptoms per-

sist, or are not listed, set the MX-D1 to standby mode, disconnect the AC power cable from the AC outlet, and then contact

the nearest Yamaha dealer.

Symptom Cause Remedy

Cannot turn on the MX-

D1?

The AC power cable is not connected

properly.

Make sure the AC power cable is connected

properly to the AC IN connector and a

suitable AC outlet.

The component connected to the

CONTROL IN jack is not turned on.

Turn on the component that is connected to

the CONTROL IN jack.

There is no sound? The MX-D1 is not connected properly. Check all connections and correct as

necessary.

The source component connected to the

MX-D1's input jacks is not set correctly.

Refer to the owner’s manual of the source

component.

The wrong inputs are selected on the MX-D1. Use the UNBAL/BAL switch to select the

correct inputs.

The MX-D1's protection system is active. Check the speaker cables for short circuits

and correct as necessary.

A hum can be heard? The audio pin cable connected to the

UNBALANCE jacks is not fully inserted.

Fully insert the audio pin cable.

The output sounds

unnatural, has a limited

bass range, and poor

stereo image?

The speaker polarity is wrong. Check the polarity of the speaker

connections and correct as necessary.

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SPECIFICATIONS

Maximum output...................... 500 W + 500 W (4 to 8 Ω)

Dynamic power..................... 1000 W + 1000 W (4 to 8 Ω)

Damping factor................................................ or more 200

Total harmonic distortion............... or less 0.003% (1 kHz)

Dynamic range........................................... or more 120 dB

(IHF-A, LPF: 20 kHz)

Frequency response.................... 1 Hz to 100 kHz (+ 3 dB)

20 Hz to 20 kHz (+0.5 dB)

Channel separation..................................... or more 100 dB

(5.1 kΩ terminated, 1 kHz)

Input jacks

UNBALANCE........................ Unbalanced 1.3 V/25 kΩ

BALANCE .................................... Balanced XLR 1.3 V

Pin 2 hot

Output jacks

SPEAKER................. Supports standard speaker cables,

banana plugs, and Y plugs

Modulation ..................... PWM (Pulse Width Modulation)

Output ............................. SEPP (Single-Ended Push-Pull)

Power source......... Resonant-type switching power supply

(frequency: 88 kHz)

CONTROL OUT

Power on .......................................... +12 V (Max. 15 mA)

Power off ...................................................................... 0 V

Power supply

U.S.A and Canada models ...................... AC 120 V, 60 Hz

Australia model....................................... AC 240 V, 50 Hz

U.K. and Europe models......................... AC 230 V, 50 Hz

China and Korea models......................... AC 220 V, 60 Hz

Asia model.................... AC 110/120/220/240 V, 50/60 Hz

Power consumption ................................................. 350 W

Power consumption in st.andby mode............ or less 0.1 Ω

Dimensions (W x H x D)..................... 435 x 75 x 437 mm

(17-1/8” x 2-7/8” x 17-3/16”)

Weight ............................................ 10.4 kg (22 lbs. 15 oz)

Accessory

AC power cable

Specifications are subject to change without notice.

MX-D1_U.fm Page 9 Thursday, June 26, 2003 5:14 PM

YAMAHA ELECTRONICS CORPORATION, USA 6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A.

YAMAHA CANADA MUSIC LTD. 135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA

YAMAHA ELECTRONIK EUROPA G.m.b.H. SIEMENSSTR. 22-34, 25462 RELLINGEN BEI HAMBURG, F.R. OF GERMANY

YAMAHA ELECTRONIQUE FRANCE S.A. RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCE

YAMAHA ELECTRONICS (UK) LTD. YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD18 7GQ, ENGLAND

YAMAHA SCANDINAVIA A.B. J A WETTERGRENS GATA 1, BOX 30053, 400 43 VÄSTRA FRÖLUNDA, SWEDEN

YAMAHA MUSIC AUSTRALIA PTY, LTD. 17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA

Printed in Japan WC01600

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Yamaha MX D1_U D1 Manual E1

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