Bad clock after NOS on CDP-337ESD - diyAudio
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Old 18th November 2015, 02:47 AM   #1
PC91 is offline PC91  Argentina
diyAudio Member
Join Date: May 2010
Unhappy Bad clock after NOS on CDP-337ESD

Hi diyaudioers, i'm cracking my head trying to NOS a superb Sony CDP337ESD.

First i've tryed lampizator mode with no good, as soon as i feed the BCLK signal to one of the DACS it starts reading bad, and when hooking up the second DAC it just wont read anymore.

After i've tryed another method where i remove CXD1144 but leave all the resistors on the data, BCLK and LRCLK lines, this time kind of worked but really bad.

The only thing that make it behave correctly was to touch with my finger the BCLK resistor and keep it there beign careful to not touch any ground if not the cdp behaves like theres no clock at all (CD spin backwards really fast).

I've tryed a lot, from diffrent values of resistors (and a trimpot) and capacitors in the place of bclk line to making a small transitorized signal amplifier (that went into smoke).

i'm just locked here, any help is appreciated.

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Old 18th November 2015, 09:57 AM   #2
Mike P is offline Mike P  United Kingdom
diyAudio Member
Join Date: Jan 2012
Hi PC91,

I also own a Sony 337ESD, you have a great CDP there!

I don't like NOS myself but you might find some clues on this video:

If you like to share notes on 337ESD maintenance and modifications let me know. I have done lots of work on mine.
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Old 18th November 2015, 12:53 PM   #3
PC91 is offline PC91  Argentina
diyAudio Member
Join Date: May 2010
Hi Mike P, I already knew that video, actually is the method i'm using right now with no success, thanks anyway
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