Cambridge Audio Azur 640-C Mk2 Owners manual

azur 540C/640C V2.0

Compact disc player

User’s manual

2 Azur compact disc player

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

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

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

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

Front panel controls....................................................................................7

Remote control............................................................................................8

Operating instructions...........................................................................9-11

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

Troubleshooting.........................................................................................12

Technical specifications ...........................................................................13

Limited warranty .......................................................................................14

CONTENTS

Azur compact disc player 3

Thank you for purchasing this Cambridge Audio Azur range CD player. These
version 2 models are part of our commitment to the on-going development
of the Azur range. We hope that you will appreciate the results and enjoy
many years of listening pleasure from them.

As with previous Azur CD players, both the 540C V2.0 and 640C V2.0 make
use of a custom Cambridge Audio servo solution and transport, at the heart
of which is a VLSI (Very Large Scale Integration) circuit which dynamically
adjusts in real time the focusing, tracking and output level of the laser for the
maximum retrieval of digital information. To ensure the very best
performance there are also multiple separate power supplies for the D/A
converter circuitry, audio filters, clocks and other stages, as well as extensive
use of low impedance film capacitors.

For the Version 2 models, we have significantly upgraded and improved the
Digital to Analog stages as well as the anti-aliasing filters for even better
sound quality and have added features that allow these products to be used
in Custom Install applications. All this proprietary engineering is housed
within our low resonance, acoustically damped chassis. An Azur Navigator
remote control is also provided, giving full remote control of your CD player in
an attractive and easy to use handset.

About the 540C V2.0

The 540C V2.0 now employs a WM8740 24 bit/192 kHz capable Digital to
Analog converter from Wolfson Microelectronics. This very high quality part is
coupled to a new three pole Double Virtual Earth Balanced filter design for
very low noise and distortion. A new toroidal transformer is now fitted giving
lower noise and less waveform distortion, for quieter PSU operation. Finally,
to allow seamless integration with multi-room entertainment systems, a
Control Bus input and output have been fitted, as has an IR emitter input.

About the 640C V2.0

The 640C V2.0 now employs a pair of WM8740 24 bit/192 kHz capable
Digital to Analog converter from Wolfson Microelectronics implemented in a
dual differential configuration. As each channel has its own DAC to process

information, completely separate analog filter circuitry can be implemented.
Moreover, because of the separation of left and right audio conver ters, the
640C V2.0 embraces a symmetrical layout. This ensures that both left and
right channel circuitry operate identically, ensuring the 640C V2.0 delivers
fantastic sound-staging and stereo imaging properties. The dual differential
configuration also offers better signal-to-noise ratios and exceptionally low
distortion characteristics in part from the use of a new version of our
proprietary Double Virtual Earth Balanced filters.

The 640C V2.0 features a new Four Pole Dual Differential Double Virtual
Earth Balanced topology. This means the DAC for each channel features two
fully balanced outputs each of which are then summed in a 3rd order virtual
earth balanced filter stage, then a further 1st order balanced filter stage
sums the balanced outputs of the earlier filter stages. This double balanced
configuration largely rejects noise and distortion products present in the
DACs and filters and provides an unprecedented level of performance. As
with the 540C V2.0, a new toroidal transformer is now fitted giving lower
noise and less waveform distortion for quieter PSU operation. Control Bus
input/output and IR emitter input have also been fitted for Custom Install use.

Your V2.0 CD player can only be as good as the system it is connected to.
Please do not compromise on your amplifier, speakers or cabling. Naturally
we particularly recommend amplification from the Cambridge Audio Azur
range, which have been designed to the same exacting standards as our CD
players. Your dealer can also supply excellent quality Cambridge Audio
interconnects to ensure your system realises its full potential.

Now we invite you to sit back, relax and enjoy!

Matthew Bramble
Technical Director

INTRODUCTION

540C/640C V2.0 Compact disc player

4 Azur compact disc player

Checking the Power Supply Rating

For your own safety please read the following instructions carefully before attempting
to connect this unit to the mains.

Check that the rear of your unit indicates the correct supply voltage. If your mains
supply voltage is different, consult your dealer.

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
damage the unit.

This equipment must be switched off when not in use and must not be used unless
correctly earthed. To reduce the risk of electric shock, do not remove the unit's
cover (or back). There are no user serviceable parts inside. Refer servicing to
qualified service personnel. If the power cord is fitted with a moulded mains plug
the unit must not be used if the plastic fuse carrier is not in place. Should you lose
the fuse carrier the correct part must be reordered from your Cambridge Audio
dealer.

The lightning flash with the arrowhead symbol within an equilateral
triangle is intended to alert the user to the presence of un-insulated
‘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

the user to the presence of important operating and maintenance

instructions in the service literature relevant to this appliance.

This product complies with European Low
Voltage (73/23 /EEC) and Electromagnetic Compatibility
(89/ 336/EEC) Directives when used and installed according to
this instruction manual. For continued compliance only
Cambridge Audio accessories should be used with this product
and servicing must be referred to qualified service personnel.

The crossed-out wheeled bin is the European Union symbol for
indicating separate collection for electrical and electronic
equipment. This product contains electrical and electronic
equipment which should be reused, recycled or recovered and
should not be disposed of with unsorted regular waste. Please
return the unit or contact the authorised dealer from whom you
purchased this product for more information.

Plug Fitting Instructions (UK Only)

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
that a 3 amp one is used. If the plug needs to be changed because it is not suitable
for your socket, or becomes damaged, it should be cut off and an appropriate plug
fitted following the wiring instructions below. The plug must then be disposed of
safely, as insertion into a 13 amp socket is likely to cause an electrical hazard.
Should it be necessary to fit a 3-pin BS mains plug to the power cord the wires
should be fitted as shown in this diagram. The colours of the wires in the mains
lead of this appliance may not correspond with the coloured markings identifying
the terminals in your plug. Connect them 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.

The wire which is coloured GREEN/YELLOW
must be connected to the terminal which is
marked with the letter ‘E’ or coloured GREEN.

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

If a 13amp (BS 1363) plug is used, a 3amp fuse must be fitted, or if any other type
of plug is used a 3amp or 5 amp fuse must be fitted, either in the plug or adaptor,
or on the distribution board.

SAFETY PRECAUTIONS

540C/640C V2.0 Compact disc player

Azur compact disc player 5

Please take a moment to read these notes before installing your Azur CD
player, they will enable you to get the best performance and prolong the
life of the product. We advise you follow all instructions, heed all
warnings and keep the instructions for future reference.

The unit is of Class 1 construction and must be connected to a Mains
socket outlet with a protective earthing connection.

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.

The unit must be installed in a manner that makes disconnection of the
mains plug from the mains socket outlet (or appliance connector from
the rear of the unit) possible.

This unit must be installed on a sturdy, level surface.

The unit requires ventilation. Do not situate it on a rug or other soft
surface and do not obstruct any air inlets or outlet grilles.

Do not place in a sealed area such as a bookcase or in a cabinet. Any
space open at the back (such as a dedicated equipment rack) is fine
however.

Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.

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.

To clean the unit, wipe its case with a moist, lint-free cloth. Do not use
any cleaning fluids containing alcohol, ammonia or abrasives. Do not
spray an aerosol at or near your CD player.

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.

If you do not intend to use this unit for a long period, switch it to Standby
and unplug it from the mains socket. Also unplug the unit during
lightning storms.

Refer all servicing to qualified service personnel. Servicing is required
when the unit has been damaged in any way, such as a damaged power­supply cord or plug, liquid has been spilled or objects have fallen into the
unit, the unit has been exposed to rain or moisture, does not operate
normally, or has been dropped.

If you have checked the Troubleshooting guide in the manual with no
improvement, do not attempt to repair, disassemble or reconstruct the
unit. A serious electric shock could result if this precautionary measure
is ignored.

IMPORTANT SAFETY INSTRUCTIONS

Important Note

This unit has been designed to play compact
discs, recordable CDs and rewritable CDs bearing
the identification logo shown here. No other discs
can be used.