Yamaha PC4002M User Manual [en, de, fr]

PROFESSIONAL SERIES

POWER AMPLIFIERS

PC4002/4002M

OPERATING MANUAL

MODE D'EMPLOl

BEDIENUNGSANLEITUNG

YAMAHA

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ABOUT THIS MANUAL

The PC4002I4002M are high-power, high-quality power am

plifiers, designed for professional use. As with any power

amplifier, the overall performance of the PC4002j4002M de

pends to a certain extent upon the system design and instal

lation, as well as on its own capabilities. Hence, this manual has been written with system installation in mind, as well as describing the operation and performance of the PC4002I4002M. It is recommended that you read the whole of this manual, but

if you are adding a PC4002I4002M to an existing system, and you are familiar with the operation of high-power amplifiers, pages 3 through 4 contain all the information necessary for

basic connection and operation.

IMPORTANT NOTICE FOR THE UNITED KINGDOM

Connecting the Plug and Cord

IMPORTANT:Tlie wires in this mains lead are coloured in accordance with the following code:

Blue

Brown

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

coloured miu'kings identifying the terminals in your plug proceed as follows:

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.

Making sure that neither core is connected to the earth terminal of the three pin plug.

NEUTRAL

LIVE

PRECAUTIONS

• Avoid placing the unit in locations exposed to direct sunlight or high temperatures, excessively high or low humidity, high dust concentraion, or vibration.

• Be sure to connect to an AC power supply that meets the power supply specifications listed on the rear of the unit.

• If there is any danger of lightning occurring nearby, remove the power plug from the wall socket in advance.

• To avoid damaging your speakers and other playback equip ment, turn off the power of all related equipment before making connections.

• Do not use excessive force in handling control switches and knobs.

• To avoid broken cords and short circuits, be sure to unplug all connectors by grasping the respective plugs—NOT the cords.

• Remove the power plug from the AC mains socket if the unit is not to be used for an extended period of time.

• Remove all plugs and connections if the unit is to be transported, to prevent damage to the cords and jacks.

• Do not use solvents such as benzene or paint thinner to clean the unit. Do not use insecticides or other pressurized spray products in proximity to the unit. Wipe off the exterior with soft cloth.

• The XLR (Cannon) type Input connectors are wired in the fol lowing configuration: Pin 1: GROUND. Pin 2: HOT. Pin 3: COLD. Ensure that all equipment connected to the PC4002/4002M matches this wiring.

CONTENTS

INTRODUCTION ..................................................................... 2

FRONT PANEL ....................................................................... 3

REAR PANEL ......................................................................... 4

INSTRUCTIONS FOR CONNECTION OF

SPEAKER CABLES ............................................................... 5

GENERAL SPECIFICATIONS

PERFORMANCE GRAPHS

MOUNTING ............................................................................. 8

INSTALLATION PRECAUTIONS CLEANING THE FAN FILTER ELEMENTS

BLOCK DIAGRAM

DIMENSIONS

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6 7

INTRODUCTION

The PC4002/4002M are top-quality, high-power ampli fiers, and with their impressive output combined with low distortion figures, are ideally suited to studio monitoring use, but at the same time are rugged enough to act ad mirably as a professional amplifier where top quality is required. Their features include:

Large, illuminated peak meters (PC4002IVI only) for instant confirmation of output levels. In addition to the

meters, which provide a faster response than VU meters,

LED clip level indicators are provided for instant signalling

of clipping.

Front panel status indicators show the following:

if bridged (BTL) operation has been selected, high-speed

fan operation, and overload/power-up muting, as well as

a power indicator. The power switch is recessed into the front panel, to prevent accidental resetting.

Decibel-calibrated input attenuators, detected for

extra accuracy. This makes for predictable and repeatable setting-up on the road, and accurate input sensitivity ad justments. In multi-amplifier setups, precise tracking be tween amplifiers can be easily achieved. Input attenuator

knob locks prevent accidental resetting of levels.

Power-up muting for about six seconds after the power

has been turned on gives protection to speakers after

power-on, avoiding the "thump" which can easily blow out cones.

Each channel is provided with input connectors

which are male and female balanced XLR, as well as bal anced 1 /4-inch phone (using a TRS-type connector). This allows convenient bridging to another amplifier, as well as adapter-free connection to almost any mixer.

Robust mechanical design for practical use. The

PC4002/4002M is, of course, 19" rack-mountable, with front handles which also help protect the controls and meters. Though designed to be extremely reliable, and to withstand the rigours of life on the road, if access is ever needed to the interior of the unit, this has been made easy, with bulb replacement, meter adjustment, etc, being pos sible from the front panel. Power-cable hooks also act as a support if the amplifier is used in a vertical position, and four feet ensure airflow if the amplifier is shelf-mounted. Multiple protection circuits safeguard the amplifier and speaker system against abuse and faulty connections.

Twin power supplies and transformers for the power amplifier stage add reliability and add quality to the sound of the PC4002/4002M.

Bridged mode (BTL) from the A channel input is easily obtained by the use of one switch on the back panel, and connecting the ( + ) terminals of the CH-A and CH-B speaker outputs to one speaker.

Figures that match the features. With a THD of less

than 0.005% at 215W into 80, and a figure which is still less than 0.01% at 700W (mono) into 80, the

PC4002/4002M is one of the cleanest high-power am

plifiers on the market - making it especially useful for studio monitoring operation. Channel separation, damping factor and signal/noise figures are as good as or better than you would normally expect from an amplifier of this calibre, while the slew rate is an impressive 60V/ixS (stereo)-fast enough to handle the fastest transients.

Speaker terminals are screw-post type, with the ability to accept heavy-gauge speaker cable for maximum fidelity.

An automatic two-speed quiet twin-fan cooling system prevents thermal overload, and cuts in at the low

speed when heat-sink temperatures exceed 60°C, and at

high speed above 80°C. The washable fan filters are re movable from the front panel, eliminating the need to re move the amplifier from a rack when the filters need to be cleaned.

FRONT PANEL

Rack Handle

Q KNOB LOCKS’

Rack Handle

PC4002 ONLY

O POWER SWITCH/POWER INDICATOR (RED)

Push this switch to turn the power ON, and push it again to turn the power OFF. The red power indicator will light when power is supplied.

©PROTECTION INDICATOR (RED)

This indicator will illuminate under two sets of circum stances: when power is first applied, a muting circuit is in operation for about six seconds after power-up, to avoid damage to speakers. This indicator will be lit at this time. Additionally, if the protection circuitry is activated for any reason (for instance, if a DC voltage exceeding ±2V ap pears at the output terminal), the speaker outputs will be shut off, and this indicator will go on. It will stay on for as long as power is applied and the condition which caused the protection circuit to activate still applies. Once the condition has been remedied, the indicator will go off, and normal operation will be resumed.

©THERMAL FAN INDICATOR (RED)

If the fans are operating at high speed (ie a heat-sink temperature of 80°C has been attained), this indicator will go on.

O BTL INDICATOR (GREEN)

This indicator will be lit if the BTL (mono bridging rtiode) switch on the back panel has been set ON.

©PEAK METERS (PC 4002M ONLY)

These large illuminated meters give a peak reading of the output level from the amplifier. The bulbs illuminating these meters are replaceable without soldering from the front

panel. The meters' zero points may also be adjusted from

the front panel.

SIGNAL INDICATORS (GREEN) (PC4002 ONLY)

These signal indicators light when the output signal level

is 2V or more (in the frequency range 20Hz-20kHz) to

confirm the input signal.

©CLIP INDICATORS

These LED indicators light up when the output distortion of the respective channel reaches a level of about 1 %.

© INPUT ATTENUATORS

These allow attenuation of the input signals in IdB cali

brations from 0-20dB, and in 2dB calibrations thereafter. The controls are detented for a positive feel, and to help with replicating settings.

© KNOB LOCKS (supplied)

Push these locks over the attenuation controls to prevent

accidental resetting of the levels. Pull them off again if you

need to reset the levels.

REAR PANEL

Cord Reel

O SPEAKER TERMINALS (FOR EACH CHANNEL)

The red speaker terminal should be connected to the "+" terminal of the speaker system, and the black terminal to the channel. (In the above illustration, terminal covers are not shown. See page 5)

©GROUND LIFT SWITCH (FOR EACH CHANNEL)

Connects or isolates the ground of XLR-pin 1. Usually left ON. However, in some cases where ground loops are causing hum, "lifting" the ground by turning this switch OFF can interrupt the loop, thereby reducing hum.

©INPUT CONNECTORS (XLR-3-31)

These female input connectors are usually used as inputs. They are wired: Pini =ground, Pin2 = hot, Pin3=cold.

Compatible connectors include ITT-Cannon XLR-3-12C,

Switchcraft 5C-1055A and Neutric NC3MX.

©INPUT CONNECTORS (XLR-3-32)

These male inputs duplicate the female input connectors

(same wiring), but are usually used for retransmitting the input signal to other amplifiers. Compatible connectors include ITT-Cannon XLR-3-11C, Switchcraft 5C-1056A

and Neutric NC3FX.

O PHONE INPUT CONNECTORS

These 1 /4-inch balanced TRS connectors accept balanced

and unblanced input signals. Tip=hot, Ring=cold, Sleeve=ground.

© MODE SELECTOR SWITCH (BTL)

When set to MONO, this switch allows bridged (mono)

operation of the amplifier. The speaker terminals should be connected to the" + " terminals of both channels (CH-A

to the speaker "+" and CH-B to the speaker "-"). When

using the PC4002/4002M in BTL (MONO) mode, con nection should be made to CH-A input only.

INSTRUCTIONS FOR CONNECTION OF SPEAKER CABLES

1. Make sure the power to the amplifier is OFF

2. Unscrew the covers over the speaker terminals (Terminal covers are not installed in USA model)

3. For each cable, strip the insulation off one end of the speaker cable for about 10mm and twist and tin the wires. Pass the

tinned wires through the terminal hole and tighten the screw to grip the cable in place.

4. Replace the covers over the speaker terminals. Make sure that the speaker cables are fed down through the gap at the bottom

of the cover, and are not pinched or trapped by the covers.

Screw

5. If all other components are connected, turn on the amplifier.

expozed to touch the chassis or cover.

GENERAL SPECIFICATIONS

These specifications are measured when the distortion of the AC Voltage is less than 1 %.

POWER OUTPUT LEVEL

Continuous average sine wave power with less than

0.05% THD. 20Hz - 20kHz Stereo 8Q

Stereo 4Q ..................................................... 700W+700W

Mono 8Q................................................................. 1400W

FREQUENCY RESPONSE

Stereo, @ 8Q, 1W Mono, @ 8Q, 1W

POWER BANDWIDTH

Stereo, 215W, 8Q, 0.1% THD

Stereo, 350W, 4Q, 0.1% THD

Mono, 700W, 8Q, 0.1% THD

TOTAL HARMONIC DISTORTION

Stereo, 215W, 8Q, 20Hz - 20kHz Stereo, 350W, 4Q, 20Hz - 20kHz

Mono, 700W, 8Q,

20Hz-20kHz

INTERMODULATION DISTORTION

Stereo, 215W, 8fì,

60Hz:7kHz=4:1 .................................................. < 0.005%

Stereo, 350W, 4i2, 60Hz:7kHz=4:1 Mono, 700W, 8£î, 60Hz:7kHz=4:1

CHANNEL SEPARATION

(Input ATT max, input 600Q Shunt) 215W, 20Hz - 20kHz

@ 8Q...........................................

DAMPING FACTOR

1kHz @ 8ÎÎ

S/N

Input 600Î2 Shunt @ IHF-A .

RESIDUAL NOISE

ATT at min, @ 12.7kHz, -6dB/oct LPF ATT at min, IHF-A network

SLEW RATE

Stereo, 8Q Mono, 8Q

SENSITIVITY

ATT max, 400W 80 @ 1 kHz .

INPUT IMPEDANCE

Balanced/unbalanced

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.......................................................... <0.01%

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......................................... <0.01%

.....

............................................... < 0.01%

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10Hz - 50kHz OdB + ldB 10Hz - 50kHz 0dB±1dB

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430W+430W

10Hz - 100kHz

............... < 0.005%

< 0.01%

> IIOdB

... +60V/).iS, Full Swing

±100V/pS, Full Swing

+4dB (1.23V)

> 80dB

> 300

< 75dB < 80dB

>15kO

MAXIMUM VOLTAGE GAIN

Input ATT maximum, @ 1kHz

METERS (PC4002M ONLY)

Large illuminated peak level meters x 2

INDICATORS

Green signal LED x (PC4002 only) Red clip LED x 2 ...

Green BTL LED x 1

Red thermal fan LED X 1 Red protection LED X 1 Red power LED x 1

PROTECTION CIRCUIT

Muting............................ 6 .sec (±2 sec) after power-on

DC sensing

PC limiter ............................................................ RL < 2Q

Thermal

COOLING FAN SPEED CIRCUIT

All temperatures refer to heat-sink temperature

Off to Low speed ..................................................... < 60°C

Low speed ................................Cuts in above 60°C. Cuts

High speed

POWER REQUIREMENTS

General model

US&Canadian models ................................ 120V AC 60Hz

POWER CONSUMPTION

General model US&Canadian models

DIMENSIONS

(W X H X D)................................ 480 X 185.6 x 460 (mm)

WEIGHT

43 kg (94.8 lbs)

SUPPLIED ACCESSORIES

KNOB LOCK X2 3mm, ALLEN KEY x 1

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2 Illuminate when signal

outputlevel goes above 2V.

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Illuminate when output

distortion from channel

Illuminates when BTL

(mono) mode is selected

Illuminates during high-

Illuminates during protection

or muting circuit operation

Illuminates when power on

....... DC +2V output voltage

> 100°C Heat Sink Temp

out when heat-sink temperature

Cuts in above 80°C. Drops

to low speed when heatsink

temperature drops below 65°C.

220/240V AC 50/60Hz

(18-7/g"x 7 5/i6"x 18-1/8")

-50dB - +7dB

0dB = 160W@8Q

exceeds approx 1 %

speed fan operation

drops below 45°C.

1600W, 2000VA

33.3dB

1600W

PERFORMANCE GRAPHS

T.H. DISTORTION VS. OUTPUT POWER

10 100 1K

POWER(W)

DAMPING FACTOR VS FREQUENCY

LOAD : 80 MODE : STEREO

LOAD : 80

T.H.DISTORTION VS OUTPUT POWER

10 100 IK

POWER(W)

FREQENCY RESPONSE

LOAD : 80

LOAD ; 80 MODE ; STEREO OdB = 1W

100 IK 10K

T.H.D. VS FREQUENCY

100

FREQ.(Hz)

LOAD : 80 MODE ; STEREO Po = 200W coni.

10K

100

CHANNEL SEPARATION

m TO

-50

-90

100

FREQ.(Hz)

10K

LOAD : 80

OdB = 200W

Measuring ch. input 6000 shunt ATT.Max.

10K

MOUNTING

When installing the PC4002/4002M, take care to avoid radiant heat. Since the amplifier is fitted with twin fans cooling system, do not block the front and rear panels.

SHELF MOUNTING

The PC4002M can be used on any flat, level surface as long as there is adequate ventilation. Do not remove the amplifier's feet as this would block airflow through the bottom panel.

PC4002M

Air Flow

Shelf

Shelf mounting

permanent-installation rack mounting

The PC4002M can be mounted in any standard 19 elec tronic equipment rack. The rear panel of the rack should be left open to promote smooth airflow. Refer to the dia grams below for the ideal cooling configuration.

* One vented blanking panel (1 U size) is necessary for

each PC4002M.

Air Flow

PORTABLE RACK MOUNTING

Road cases must be durable enough to withstand rough

handling and airline travel. Use a vented blanking panel

(1 Usize) at the bottom of the PC4002M (like that below).

li ii[ III II iiiiiii III III mil II mil II III III III

Unit : mm

Blanking panel

PC4002M- 1U size vented

blanking panel

Rack mounting with vented Blanking panels

YAMAHA VP1 Ventilation panel may he provided as an optional accessory, (open area should be at least 35% of total area)

---------------------------If unit(s) are to be used in a rack mounted installation, it

is recommended that Unit(s) should be used with vented blanking panel(s) as above.

CAUTION!

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INSTALLATION PRECAUTIONS

• If you are using long speaker cables, use the heavy gauge cables which are practical, in order to prevent damping factor deterioration and/or power loss through the cable. The PC4002/4002M's speaker terminals allow you to use even the heavy gauge cables.

• The PC4002/4002M produces 430W + 430W (into Sohms) in stereo mode, and 1400W (into Sohms) in mono mode, so use a speaker system which has sufficient capacity to handle this power comfortably. You can protect speakers of lower rated input capacity than the rated output power of the PC4002/4002M by connecting a fuse directly between the speaker and amplifier (see illustration). When using a system such as the one illustrated, follow the procedure on this page to determine the capacity of the fuse to be used.

PO = |2r

PO: Speaker continuous input power capacity (Noise

or RMS) R: Nominal impedance of speaker I: Required fuse capacity (A)

l = yP0/R

Example

Speaker continuous input power capacity 100W Speaker impedance Sohms

IF THE CUPPING AND PROTECTION CIRCUIT OPERATION INDICATORS LIGHT UP

Indicator

Clip Indicator

Protection indicator

Short in speaker termi nal, amplifier output ter minal, or cable

Amplifier overloaded

Heatsink temperature exceeds 100°C

A DC voltage of more than Ì2V has occurred at the output terminals

Cause Check

Examine the places where shorting may have occurred

Make sure the speaker system impedance is more than 4ohms when in stereo mode, and Sohms when in mono mode

Check the airflow and take appropriate meas ures to keep the amplifier(s) cool

Contact your YAMAHA distributor or service center

In this example

l=yi00/8

l==3.5A

Protection Circuit Oper ation

The PC limiter is in op eration, protectiong the power transistors

The same as above

The thermal protection is in operation, protecting the Power transistors.

The protection relay is in operation, protecting the speaker system

CLEANING THE FAN FILTER ELEMENTS

1. Make sure the power to the amplifier is OFF.

2. Remove the power plug from the AC mains socket.

3. Use the supplied 3mm Allen key (hex wrench) to remove the four hex bolts securirig the front filter grilles.

4. Remove the filter elements, and wash in plain water. If the filter elements are exceptionally dirty, detergent

(washing-up liquid) may be used.

5. Dry the filter elements thoroughly. NEVER REPLACE THE FILTER ELEMENTS WHILE THEY ARE STILL WETI Replace the elements and front filter grilles. (The re placement part number of the filter element is Vi 31380.)

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