Cambridge Audio 540A: instruction

azur 540A/640A V2.0

Integrated amplifier / Integrierter Verstärker / Amplificateur intégré / Amplificador integrado /

Amplificatore integrato / Geïntegreerde versterker / Integreret forstærker /

Интегральный усилитель

User’s manual / Bedienungsanleitung / Mode d'emploi / Manual del usuario /

Manuale per l'utente / Gebruikershandleiding / Brugermanual /

Руководство для пользователя

CONTENTS

English .........................................................................................................2

Introduction .................................................................................................3

Deutsch .....................................................................................................20

Safety precautions ......................................................................................4

Français .....................................................................................................38

Important safety instructions.....................................................................5

Rear panel connections..............................................................................6

Español......................................................................................................56

Connecting...................................................................................................8

Italiano .......................................................................................................74

Front panel controls..................................................................................10

Nederlands................................................................................................92

Remote control..........................................................................................12

Dansk ......................................................................................................110

Custom installation use ...........................................................................12

Русский....................................................................................................128

Multi-Room................................................................................................13

CAP5 protection system ...........................................................................14

Troubleshooting.........................................................................................16

Technical specifications ...........................................................................17

Limited warranty .......................................................................................18

2 Azur integrated amplifier

540A/640A V2.0 Integrated amplifier

INTRODUCTION

Thank

you

for

purchasing

this

Cambridge

Audio

Azur

range

amplifier.

Incognito

Ready

/

Custom

Install

Use

These

version

2

models

are

part

of

our

commitment

to

the

on-ggoing

development

of

the

Azur

range.

We

hope

that

you

will

appreciate

the

Both the 540A V2.0 and 640A V2.0 now feature outputs for the new

results

and

enjoy

many

years

of

listening

pleasure

from

them.

Cambridge Audio Incognito system. By plugging in one or two external

Incognito Keypads and a power supply unit your V2.0 amplifier can

For these version 2 models we have been able to further improve the

become the hub of a simple multi-room system. In addition, Control Bus

audio quality and make them more powerful through many detailed

Input/Output and IR Emitter Input are provided to make it easy to

changes and enhancements developed as a result of our on-going

integrate these units into Custom Installation systems.

research programme. We have also added some new features, including

support for Multi-Room use. All this proprietary engineering is housed

Your V2.0 amplifier can only be as good as the system it is connected to.

within our low resonance, acoustically damped chassis. An Azur

Please do not compromise on your source equipment, speakers or

Navigator remote control is also provided, giving full remote control of

cabling. Naturally we particularly recommend models from the

your amplifier in an attractive and easy to use handset.

Cambridge Audio Azur range, which have been designed to the same

exacting standards as our amplifiers. Your dealer can also supply

About

the

540A

V2.0

excellent quality Cambridge Audio interconnects to ensure your system

realises its full potential.

The 540A V2.0 features a new preamp stage with buffered inputs for

lower crosstalk and improved stereo imaging, whilst the headphone

Thanks for taking the time to read this manual, we do recommend you

output is now provided be a separate Class A headphone driver circuit.

keep it for future reference.

The amplifier stage has been revised with new low-noise input

transistors, special driver stage PSU regulation, a new voltage amplifier

topology and separate current sources for the voltage amplifier and pre-

driver stages. These enhancements to the original circuits all work to

elevate the sound quality to a new level. A new heatsink and transformer

Matthew Bramble

are employed and the power output is now 60 watts per channel (from

Technical Director

50 wpc on the V1 model).

About

the

640A

V2.0

Featuring all of the above enhancements, the 640A V2.0 also features

separate transformer secondaries for left and right channels, twin

rectifiers and separate PSU's for dual mono operation of the left and

right power amplifiers. An even larger heatsink and transformer are

employed and power output is now 75 watts per channel (from 65wpc

on the V1 model).

Azur integrated amplifier 3

SAFETY PRECAUTIONS

Checking

the

Power

Supply

Rating

The crossed-out wheeled bin is the European Union symbol for

indicating separate collection for electrical and electronic

For your own safety please read the following instructions carefully before attempting

equipment. This product contains electrical and electronic

to connect this unit to the mains.

equipment which should be reused, recycled or recovered and

should not be disposed of with unsorted regular waste. Please

Check that the rear of your unit indicates the correct supply voltage. If your mains

return the unit or contact the authorised dealer from whom you

supply voltage is different, consult your dealer.

purchased this product for more information.

This unit is designed to operate only on the supply voltage and type that is

indicated on the rear panel of the unit. Connecting to other power sources may

Plug

Fitting

Instructions

(UK Only)

damage the unit.

The cord supplied with this appliance is factory fitted with a 13 amp mains plug

fitted with a 3 amp fuse inside. If it is necessary to change the fuse, it is important

This equipment must be switched off when not in use and must not be used unless

that a 3 amp one is used. If the plug needs to be changed because it is not suitable

correctly earthed. To reduce the risk of electric shock, do not remove the unit's

for your socket, or becomes damaged, it should be cut off and an appropriate plug

cover (or back). There are no user serviceable parts inside. Refer servicing to

fitted following the wiring instructions below. The plug must then be disposed of

qualified service personnel. If the power cord is fitted with a moulded mains plug

safely, as insertion into a 13 amp socket is likely to cause an electrical hazard.

the unit must not be used if the plastic fuse carrier is not in place. Should you lose

Should it be necessary to fit a 3-pin BS mains plug to the power cord the wires

the fuse carrier the correct part must be reordered from your Cambridge Audio

should be fitted as shown in this diagram. The colours of the wires in the mains

dealer.

lead of this appliance may not correspond with the coloured markings identifying

The lightning flash with the arrowhead symbol within an equilateral

the terminals in your plug. Connect them as follows:

triangle is intended to alert the user to the presence of un-insulated

The wire which is coloured BLUE must be connected to the terminal which is

‘dangerous voltage’ within the product’s enclosure that may be of

marked with the letter ‘N’ or coloured BLACK.

sufficient magnitude to constitute a risk of electric shock to

persons.

The wire which is coloured BROWN must be connected to the terminal which is

marked with the letter ‘L’ or coloured RED.

The exclamation point within an equilateral triangle is intended to alert

the user to the presence of important operating and maintenance

The wire which is coloured GREEN/YELLOW must be connected to the terminal

instructions in the service literature relevant to this appliance.

which is marked with the letter ‘E’ or coloured GREEN.

This product complies with European Low

If your model does not have an earth wire, then disregard this instruction.

Voltage (73/23/EEC) and Electromagnetic Compatibility

(89/336/EEC) Directives when used and installed according to

If a 13amp (BS 1363) plug is used, a 3amp fuse must be fitted, or if any other type

this instruction manual. For continued compliance only

of plug is used a 3amp or 5amp fuse must be fitted, either in the plug or adaptor,

Cambridge Audio accessories should be used with this product

or on the distribution board.

and servicing must be referred to qualified service personnel.

4 Azur integrated amplifier

540A/640A V2.0 Integrated amplifier

IMPORTANT SAFETY INSTRUCTIONS

Please take a moment to read these notes before installing your Azur

It is recommended that when bi-amping, the same type power amplifiers

amplifier, they will enable you to get the best performance and prolong

are used.

the life of the product. We advise you follow all instructions, heed all

This unit must be disconnected from the mains socket to be turned off

warnings and keep the instructions for future reference.

completely. If you do not intend to use this unit for a long period of time,

The unit is of Class 1 construction and must be connected to a Mains

unplug it from the mains socket. Unplug this unit during lightning

socket outlet with a protective earthing connection.

storms.

The unit requires ventilation above and below. Do not situate it on a rug

To clean the unit, wipe its case with a moist, lint-free cloth. Do not use

or other soft surface and do not obstruct any air inlet or outlet grilles on

any cleaning fluids containing alcohol, ammonia or abrasives. Do not

the underside and top cover. Do not place in an enclosed area such as

spray an aerosol at or near the amplifier.

a bookcase or in the cabinet.

This unit is not user serviceable, never attempt to repair, disassemble or

Do not install near any heat sources such as radiators, heat register,

reconstruct the unit if there seems to be a problem. Servicing is required

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

when the unit has been damaged in any way, such as power-supply cord

or plug is damaged, liquid has been spilled or objects have fallen into it,

Do not defeat the safety purpose of the polarized or grounding type plug.

the unit has been exposed to rain or moisture, does not operate

A polarized plug has two blades with one wider than the other. A

normally or has been dropped. A serious electric shock could result if

grounding type plug has two blades and a third grounding prong. The

this precautionary measure is ignored.

wide blade or third prong are provided for your safety. If the provided

plug does not fit your outlet, consult an electrician for replacement of

This unit should be installed on a sturdy, level surface. Due to stray

the obsolete outlet.

magnetic fields turntables should not be located nearby due to

interference.

WARNING - To reduce the risk of fire or electric shock, do not expose this

unit to rain or moisture. This unit must not be exposed to dripping or

splashing water or other liquids. No objects filled with liquid, such as

vases, shall be placed on the unit. In the event, switch off immediately,

disconnect from the mains supply and contact your dealer for advice.

Ensure that small objects do not fall through any ventilation grille. If this

happens, switch off immediately, disconnect from the mains supply and

contact your dealer for advice.

Do not route the power cable so that it can be walked upon or damaged

by other items near it.

Azur integrated amplifier 5

Power

On/Off

Connect the wires from your left channel loudspeaker to the LEFT + & -

terminals, and the wires from the right channel loudspeaker to the

Switches the unit on and off.

RIGHT + & - terminals. In each case, the red terminal is the positive

output and the black terminal is the negative output.

Mains

voltage

selector

switch

Care should be taken to ensure no stray strands of wire are shorting speaker

Switches the mains voltage between 115V and 230V. For use by

outputs together. Please ensure that the loudspeaker terminals have been

installer/dealer only.

tightened adequately to provide a good electrical connection. It is possible

AC power

socket

for the sound quality to be affected if the screw terminals are loose.

Once you have completed all connections to the amplifier, plug the AC

Note:

When using one pair of speakers, use speakers with a nominal

power cable into an appropriate mains socket. Your amplifier is now

impedance of between 4-8 ohms. When using two pairs of speakers,

ready for use.

use speakers with a nominal impedance of between 6-8 ohms each.

Loudspeaker

terminals

IR

(Infrared)

Emitter

In

Two sets of loudspeaker terminals are available,

A

(main loudspeaker

Allows modulated IR commands from multi-room systems to be received by

terminals) and

B

(secondary switchable loudspeaker terminals).

the amplifier. Commands received here are not looped out of the Control

Bus. Refer to the ‘Custom Installation’ section for more information.

6 Azur integrated amplifier

REAR PANEL CONNECTIONS

6

1

5

7

2

4

111098

3

1

2

3

4

5