CD player NAD 502 as DAC, is it possible ? - diyAudio
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Old 19th August 2010, 05:44 AM   #1
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Default CD player NAD 502 as DAC, is it possible ?

Hello, I am newbie here.
I have CD player NAD 502 and I love it too much.
Unfortunately the CD transport went to hell recently.
The transport didn't lift the tray up. :-(
My question is:
Does any one know how to modify/DIY NAD 502 to become the DAC ?

Here is NAD 502 service manual.

http://www.gigchat.com/NAD_502.pdf

Thank you in advance.
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Old 19th August 2010, 07:07 AM   #2
dangus is offline dangus  Canada
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Get an S/PDIF receiver chip, preferably already on a convenient little board, and connect it instead of those 3 lines from the CXD1167 (Q103). You'll need to look at how the CXD1167 (or MASH chip Q105) is configured so the receiver chip can be jumpered to produce the correct data format.

This thread has a data sheet for Q105:
NONOS for my NAD-502 (I2S from MN6474)
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Old 23rd August 2010, 05:51 PM   #3
Lautar is offline Lautar  Ukraine
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is bad idea.
beleve MASH dac MN6474 is not interested.
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Old 25th April 2011, 06:41 AM   #4
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Hello

A friend of mine just ask me to modify his Nad 502 to become a Dac.

I would use a WM8804 for the receiver.

The MN6474 use a 33.86 mhz xtal, but the WM8804 use a 12 mhz xtal.

Would it work ok, could it do some drop bit since it would have two different xtal frequency ?

Thank

Bye

Gaetan

Last edited by gaetan8888; 25th April 2011 at 06:56 AM.
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Old 25th April 2011, 07:07 AM   #5
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Quote:
Originally Posted by gaetan8888 View Post
Hello

A friend of mine just ask me to modify his Nad 502 to become a Dac.

Just be firm and refuse moronic requests
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Old 25th April 2011, 08:57 AM   #6
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Hello

My question still there for any type of mods, wen we use a receiver chip who use a different xtal frequency than the dac chip xtal, does it do a problems like drop bit or else ?

Thank

Bye

Gaetan
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Old 20th May 2011, 03:27 PM   #7
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Hello gaetan8888,
If your friend like NAD 502 sound that much and have problem with NAD 502 machanic like me. I would suggest this.

Audio Spare KSL2101ABM (KSL 2101ABM) - CD LASER UNIT (PICK UP) (MECHANISM) SONY...

I ordered from this website and found it very good price, fast shipping.
It's the same model in NAD 502.
My NAD 502 back to live again. Cheers.
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