Cambridge audio Isomagic S700 DAC PSU

[dj_holmes]

Hi guys, I got one of these and am absolutely dying to get it going! I think I need 3 x 15 volt supplies 2 x 15+ and 1 x 15-

How would I do that? Is it just 1x 15v output and I share 3 connections? Also is it one transformer and bridge recitifer and thats it? It already has transistors on board. I know there is a few bits of information on this but I am struggling to understand it to be honest! Any help appreciated! Thanks

Oh it has a blown Tantalum cap that I should fix first or replace all probably.

 

[dj_holmes]

anyone?

 

[jean-paul]

First: don't die.

Second: do you have a schematic ?

Third: do you have the old PSU ?

Fourth: are you sure it still works ? Caps generally don't blow without a reason.

Apparently you are not the only one with a defective PSU:

http://www.diyaudio.com/forums/digi...pgrade-cambridge-audio-s700-isomagic-dac.html

I think this should get you going:

https://www.audio-forums.com/threads/cambridge-audio-discmagic-isomagic-project.110724/

 

[aparatusonitus]

Send me a pm with a private email address included...will supply a schematic (from the great John Westlake, cannibalized by unknown CA techs) and some images.

 

[jean-paul]

Can I have it too ? Just curious why they used to break down so often.

 

[aparatusonitus]

Sure JP, mail me.

 

[dj_holmes]

pm sent

 

[Mooly]

Moved to Digital Line Level forum.

 

[dj_holmes]

Watch out the inspectors about! LOL

Thanks for the link still bit confused about power source. Is it just transformer and bridge recitifier then straight to the dac power input? Does anyone have a pic of the powersource? Does it need to be grounded (to earth?) for it to work or just +- 15v?

Thanks

 

[aparatusonitus]

First things first, show as what you have...upload few high-res pics of your dac.

 

[dj_holmes]

ok these are some pics sorry for delay but with a new born sleep is quite rare lately!

You can see blown cap. I have not replaced yet. But will I'm 90% certain the DAC works Ive had it sitting in my cupboard for a while now been itching like hell to get it going!!! Just need the PSU. I have read a lot about how to build them just need to get started

 

[dj_holmes]

I will try and replace capacitor seen in top centre in middle picture but without power supply cannot test. I have service manual but doesnt really make sense. A picture of the power supply would be good if anyone has it please?