Modding Azur 640A - Page 12 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 23rd September 2012, 11:14 AM   #111
diyAudio Member
Join Date: Mar 2011
hi, i am planing modding 640a azur. it seem nice option to upgrade the amp
  Reply With Quote
Old 23rd September 2012, 01:09 PM   #112
diyAudio Member
thunk303's Avatar
Join Date: Mar 2005
Location: Eltham, Melbourne, Australia
Does one of the generous gentleman here wish to start a communal spreadsheet with a list of parts changes for the 640Av2

Go on, you know you want to
  Reply With Quote
Old 23rd September 2012, 01:12 PM   #113
diyAudio Member
Join Date: Mar 2011
yeahhh.............. that good idea
  Reply With Quote
Old 17th November 2012, 05:39 PM   #114
sasha70 is offline sasha70  United Kingdom
diyAudio Member
Join Date: Jul 2011
Location: Newtownards
Good evening all,
I have modified my CA 540A a couple of years back.
Similar schematic to CA 640A.
Schottky diode on power rail,
Bigger caps at power rails and beside opamps,
Removed coupling caps from signal path,
Replaced pots, except volume,
Installed sockets for opamps and replaced opamp to 4562 (I thing),
Installed screen on cables going across board.
I have service manuals for some models of CA, please contact me if interested.
Best regards.
  Reply With Quote
Old 26th August 2013, 10:51 AM   #115
diyAudio Member
Join Date: Nov 2008
Cambridge Audio | Owners Manuals, Service Manuals, Schematics, Free Download | HiFi Engine
  Reply With Quote
Old 17th April 2014, 06:48 AM   #116
diyAudio Member
Join Date: Jul 2012
correct me if im wrong to my point of view to much in capacitance in supply rail is thier an improvement in sound? couse it think there is an exact capacitance in a given power of the transformer
  Reply With Quote
Old 24th May 2014, 07:34 AM   #117
diyAudio Member
DECKY999's Avatar
Join Date: Jul 2007
Anyone has a service manual for A640 V2 - it is misbehaving after modding. I only have V1 version but they are quite different.
The only true way is no way.
  Reply With Quote
Old 24th May 2014, 10:25 AM   #118
diyAudio Member
manolo2001's Avatar
Join Date: May 2012
Location: Santiago, Chile
Hello Decky,

Attaced is the link to the service manual I used, it is revised May 2008, and as far as I remember it was quite accurate, still I gave up on the CA 640A v2 I had and sold it. Simply did not like the sound of it.

Anyway, this is the link, hope it helps:

640A Integrated Amplifier free ebook download


  Reply With Quote
Old 25th May 2014, 01:56 AM   #119
diyAudio Member
DECKY999's Avatar
Join Date: Jul 2007
Thanks Manuel

I have that one - it is accurate but there are more than few differences between V1 and V2. I am especially curious about that protection implementation. I am suspicious that is plays some funny games with me - hopefully that controller is still in one piece. I also did a mod of V1 and that sounded lovely - hoping that V2 would be better - fools hope? Maybe?
The only true way is no way.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cambridge Audio Azur 640C V1 dome406 Digital Source 12 15th December 2012 08:18 AM
Modding a Cambridge AZUR 740C Cormac Digital Source 14 2nd March 2012 04:20 PM
Blown-up Azur 340A borges Chip Amps 7 17th March 2010 03:17 PM
Cambridge Audio 640A V2 - service manual Paolo.n Solid State 0 7th July 2009 11:19 AM
Cambridge Audio Azur 640A toroidal power transformer (115V) limono Swap Meet 1 25th December 2008 04:57 PM

New To Site? Need Help?

All times are GMT. The time now is 09:28 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2