Cambridge Audio Stereo System 540P User Manual

azur 540P/640P  
Phono pre-amplifer  
User’s manual  
 
540P/640P Phono pre-amplifer  
CONTENTS  
IMPORTANT SAFETY INSTRUCTIONS  
Introduction .................................................................................................2  
Important safety Information......................................................................3  
Rear panel connections..............................................................................4  
Troubleshooting......................................................................................... 6  
Specifications ............................................................................................6  
Please take a moment to read these notes before installing your Azur  
phono pre-amplifier, 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.  
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.  
Do not route the power cable so that it can be walked upon or damaged  
by other items near it.  
Limited warranty.......................................................................................  
7
Electronic audio components have a running in period of around a week  
(if used several hours per day). This will allow the new components to  
settle down, the sonic properties will improve over this time.  
If you do not intend to use this unit for a long period of time, unplug it  
from the mains socket.  
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 the amplifier.  
These units are not user serviceable, never attempt to repair,  
disassemble or reconstruct the unit if there seems to be a problem. A  
serious electric shock could result if this precautionary measure is  
ignored. In the event of a problem or failure, please contact your dealer.  
Azur phono pre-amplifier 3  
 
REAR PANEL CONNECTIONS  
azur 540P  
azur 640P  
MM/MC Phono Pre-Amplifier  
Turntable  
Ground  
Turntable  
Ground  
MM Phono Pre-Amplifier  
R
L
R
L
Designed in London, England  
R
L
R
L
R
L
Designed in London, England  
12V  
12V  
On  
Subsonic Filter  
This device complies with part 15 of FCC rules  
Off  
MM  
MC  
0.5 A  
0.5 A  
R
Output  
L
R
MM  
L
R
Output  
L
Cartridge Type  
R
MM  
L
R
MC  
L
Manufactured in an  
ISO9002 approved facility  
Use supplied PSU only!  
Phono Input  
Use supplied PSU only!  
This device complies with part 15 of FCC rules  
Manufactured in an ISO9002 approved facility  
540P  
MC input sockets (640P only)  
640P  
Subsonic Filter (640P only)  
If your turntable uses a moving coil cartridge, connect outputs here  
(0.5-1mV, with 100 ohm 220pF loading).  
The subsonic filter cuts out very low frequency ‘rumble’, caused by vinyl  
imperfections, which can affect your system’s performance.  
MM input sockets  
Output sockets  
If your turntable uses a moving magnet cartridge, connect outputs here  
(3-5mV, with 47k ohm 220pF loading).  
Use phono cables to connect to any line level input on your amplifier,  
such as Aux.  
NB. Do not connect to a phono level input.  
Turntable ground  
If your turntable has a separate grounding lead then connect here. This  
provides shielding to the arm and the sensitive circuitry in the turntable.  
PSU socket  
Once you have completed all connections to the amplifier and turntable,  
plug the PSU power cable into an appropriate mains socket. The blue  
LED on the front panel will indicate that the power is on. The unit has  
been designed to be left permanently powered.  
Cartridge Type selector switch (640P only)  
Match this switch to the cartridge type that your tunrtable uses. MM for  
a moving magnet cartridge or MC for a moving coil cartridge.  
Please note the 640P has an output relay, which after power on takes  
15 seconds to come out of mute.  
NB. Only use supplied power supply.  
4 Azur phono pre-amplifier  
 
540P/640P Phono pre-amplifer  
only one of these  
connections  
To any line level  
input on you  
amplifier using  
phono cable  
(2RCA-2RCA)  
From a  
turntable  
with a  
moving  
magnet  
cartridge  
using  
phono  
cable  
(2RCA-2RCA)  
To any line level  
input on you  
amplifier using  
phono cable  
(2RCA-2RCA)  
From a  
turntable  
with a  
moving  
magnet  
cartridge  
using  
phono  
cable  
(2RCA-2RCA)  
From a  
turntable  
with a  
moving  
coil  
cartridge  
using  
phono  
cable  
(2RCA-2RCA)  
Must not be  
connected to a  
phono level  
input  
Must not be  
connected to a  
phono level  
input  
azur 540P  
MM Phono Pre-Amplifier  
Turntable  
Ground  
azur 640P  
MM/MC Phono Pre-Amplifier  
Turntable  
Ground  
R
L
R
L
Designed in London, England  
R
L
R
L
R
L
Designed in London, England  
12V  
12V  
On  
Subsonic Filter  
This device complies with part 15 of FCC rules  
Off  
MM  
MC  
0.5 A  
0.5 A  
R
Output  
L
R
MM  
L
R
Output  
L
Cartridge Type  
R
MM  
L
R
MC  
L
Manufactured in an  
ISO9002 approved facility  
Use supplied PSU only!  
Phono Input  
Use supplied PSU only!  
This device complies with part 15 of FCC rules  
Manufactured in an ISO9002 approved facility  
540P  
640P  
Azur phono pre-amplifier 5  
 
TROUBLESHOOTING  
SPECIFICATIONS  
540P  
640P  
(MM)  
640P  
(MC)  
There is no power  
Ensure the AC power cord is connected securely.  
Ensure the plug is fully inserted and is switched on.  
Max power consumption  
Gain @ 1kHz  
5W  
5W  
5W  
There is no sound  
Make sure the unit is plugged in.  
Check that your turntable is properly connected.  
Check that your speakers are properly connected.  
Check all connections are secure and correct amplifier input is selected.  
Ensure correct cartridge type has been selected (MM or MC).  
39dB  
300mV  
3.35mV  
39dB  
300mV  
3.35mV  
55dB  
300mV  
0.5mV  
Nominal output  
Sensitivity for  
nominal output  
THD 20Hz-20kHz  
<0.009%  
<0.005%  
<0.002%  
There is no sound on one channel  
Check that your speakers are properly connected.  
Check all connections are secure.  
RIAA curve accuracy  
<+/-0.65dB  
25hz-20kHz  
<+/-0.3dB  
20Hz-50kHz  
<+/-0.3dB  
20Hz-50kHz  
(subsonic filter off)  
There is a loud buzz or hum  
Signal to noise ratio  
using Audio Precision RIAA-1  
with grounded inputs  
>85dB  
>76dB  
>86dB  
>72dB  
>69dB  
Check turntable or tone arm for ground and connection  
lead fault.  
Ensure no connections are loose or defective.  
Ensure that your turntable is not too close to the amplifier.  
Crosstalk @ 20kHz  
>83dB  
Volume is too loud/quiet  
Dimensions (HxWxD)  
mm  
46 x 215 x 133  
1.8 x 8.5 x 5.2  
46 x 215 x 133  
1.8 x 8.5 x 5.2  
46 x 215 x 133  
1.8 x 8.5 x 5.2  
Check cartridge type matches input type. If a MC cartridge  
is connected through the MM inputs, volume will be very  
quiet (and vica versa). Note that it is possible to obtain  
high level MC cartridges which are designed for an MM  
input.  
inches  
Weight  
kg  
lbs  
0.8  
1.8  
0.9  
2
0.9  
2
6 Azur phono pre-amplifier  
 
540P/640P Phono pre-amplifer  
LIMITED WARRANTY  
Cambridge Audio warrants this product to be free from defects in  
materials and workmanship (subject to the terms set forth below).  
Cambridge Audio will repair or replace (at Cambridge Audio's option) this  
product or any defective parts in this product. Warranty periods may vary  
from country to country. If in doubt consult your dealer and ensure that  
you retain proof of purchase.  
Cambridge Audio dealer, or authorised service agent which is authorised  
to do Cambridge Audio warranty work. Any unauthorised repairs will void  
this Warranty. This Warranty does not cover products sold AS IS or WITH  
ALL FAULTS.  
REPAIRS OR REPLACEMENTS AS PROVIDED UNDER THIS WARRANTY  
ARE THE EXCLUSIVE REMEDY OF THE CONSUMER. CAMBRIDGE AUDIO  
SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL  
DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY IN  
THIS PRODUCT. EXCEPT TO THE EXTENT PROHIBITED BY LAW, THIS  
WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND  
IMPLIED WARRANTIES WHATSOEVER INCLUDING, BUT NOT LIMITED TO,  
THE WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PRACTICAL  
PURPOSE.  
To obtain warranty service, please contact the Cambridge Audio  
authorised dealer from which you purchased this product. If your dealer  
is not equipped to perform the repair of your Cambridge Audio product,  
it can be returned by your dealer to Cambridge Audio or an authorised  
Cambridge Audio service agent. You will need to ship this product in  
either its original packaging or packaging affording an equal degree of  
protection.  
Proof of purchase in the form of a bill of sale or receipted invoice, which  
is evidence that this product is within the warranty period, must be  
presented to obtain warranty service.  
Some countries and US states do not allow the exclusion or limitation of  
incidental or consequential damages or implied warranties so the above  
exclusions may not apply to you. This Warranty gives you specific legal  
rights, and you may have other statutory rights, which vary from state to  
state or country to country.  
This Warranty is invalid if (a) the factory-applied serial number has been  
altered or removed from this product or (b) this product was not  
purchased from a Cambridge Audio authorised dealer. You may call  
Cambridge Audio or your local country Cambridge Audio distributor to  
confirm that you have an unaltered serial number and/or you purchased  
from a Cambridge Audio authorised dealer.  
This Warranty does not cover cosmetic damage or damage due to acts  
of God, accident, misuse, abuse, negligence, commercial use, or  
modification of, or to any part of, the product. This Warranty does not  
cover damage due to improper operation, maintenance or installation,  
or attempted repair by anyone other than Cambridge Audio or a  
Azur phono pre-amplifier 7  
 
azur 540P/640P  
Part No. AP14509/2  
 

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