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Old 20th August 2010, 09:02 PM   #1
Gopher is offline Gopher  United Kingdom
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Default DacMagic Service Manual

Does anyone have a PDF of the service manual or schematic for the Cambridge Audio DacMagic Azur DAC (the latest one)?

Thanks

Gopher
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Old 20th August 2010, 09:10 PM   #2
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I haven't heard of one in the wild but, from the thread Opening the new DacMagic????:


Quote:
Originally Posted by Glenn2 View Post
Click on this link to download the service manual for the Cambridge 740C.

Cambridge Audio 740C Service Manual

On page 20, you'll find the DAC section.

The Dacmagic has the same filter circuit (even the same part labels), apart from:
a) the resistor/capacitor values in the filter are slightly different due to the upsampling being 384kHz in the 740C and 192kHz in the DM no doubt,
b) the DM takes the balanced signals from each of the first 4 dual op-amps (NE5532) to the XLR sockets, which the 740C doesn't have, as well as the summing op-amp (OP275), so the stuff at the output with the coupling cap, relay, etc. is present 6 times in the DM instead of twice in the 740C.................
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Old 22nd August 2010, 05:19 AM   #3
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Thanks sonus

If you dig down into that link you can find it, along with many others.

Index of /manuals
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Old 22nd August 2010, 05:27 AM   #4
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Thanks sonus

If you dig down into that link you can find it, along with many others.

Index of /manuals
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Old 6th September 2010, 04:52 PM   #5
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Hi Gopher!
Service manual for dacmagic is great!
Could you dump your eprom for me if you don't mind? This is simple and wouldn't take much time, but for me it would be something really precious. Let me know.
Regards
Arek
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Old 6th September 2010, 06:06 PM   #6
Gopher is offline Gopher  United Kingdom
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I wouldn't know where to start in dumping my EPROM!!

I'm just messing about with the power supplies, regulators and output stage. Good old analogue engineering that I understand.

Why don't you buy one? To be honest I wouldn't fool around with the software. They probably know what they're doing a bit more than you do.

Last edited by Gopher; 6th September 2010 at 06:11 PM.
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Old 6th September 2010, 06:41 PM   #7
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Thank you for your quick answer.
It's not possible to buy eprom only, because Cambridge Audio doesn't sell single components even to authorized services. The smallest element you can buy is Main PCB. Eprom is the only part you can't buy, because it is programmed.
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Old 8th September 2010, 11:24 AM   #8
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2betton2

You can get a new DacMagic 2 for less than 220 or $250. Even less for second hand ones.

Just buy the a DacMagic then start listening to music with it instead of fiddling around with EPROMS and trying to second guess the engineers who designed it.
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Old 10th May 2011, 11:42 AM   #9
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Default Missing Cambridge Audio 740C or DACMAGIC Service Manual

Hi all,

It looks like the link to the service manual is dead. Could you please, repost it somewhere again if you have it downloaded before it was gone?
Actually I need a path between SPDIF to the TDA1305 chip as I wanted to reuse my dead Micromega Stage 6 audio board as a DAC plus headphone amp.

Thanks, Rad.
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