Yamaha CDX-596 schematic needed for tuning - diyAudio
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Old 7th February 2012, 09:35 AM   #1
Goetz is offline Goetz  Germany
diyAudio Member
Join Date: Jul 2007
Default Yamaha CDX-596 schematic needed for tuning

Dear All,

I'am looking for a schematic of Yamaha CDX-596 for tuning with Burson op-Amps etc., better caps, violin laquer etc.
If you have further proposal, experience to share pls let me know.
Esp. a schematic would be helpful.
Thank in advance for your help.
Have a nice day and sucessful week !
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Old 7th February 2012, 12:12 PM   #2
diyAudio Member
Join Date: Dec 2003
Location: Sydney
I have full service manual. Do you need circuit diagram only?

Suggestions after very quick glance at the circuit diagram:

1. 16.9344MHz oscillator with dedicated low noise power supply
2. AD1854 will do much better with LM4562 if you pay a bit of attention to lowering the noise and get local decoupling at OP's done semi-decent. If you get job done properly, use LM6172. DAC is Vout type, so you could try simple differential to single end transformer solution and omit all IC’s / the whole analogue stage.
3. the chip used in power supply is mediocre dual tracking type: M5290 with bad ripple rejection - you could install your own power supply regulation to obtain much better results... even with the transformer in analogue stage, it appears you’ll still need +5.6 V DC used in an analogue stage, for spindle motor & its servo control, so analogue power supply will have to stay….

Let me know if you are happy with circuit diagram only, I can extract the page and post it here on this thread for others to use / give suggestions….

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Old 7th February 2012, 12:19 PM   #3
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File Type: zip Pages from yamaha_cdx-596_[ET].zip (717.0 KB, 14 views)
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Old 7th February 2012, 01:59 PM   #4
Goetz is offline Goetz  Germany
diyAudio Member
Join Date: Jul 2007
Dear Boky,
thank you very much for your magnificient and prompt support. This player has to perform with its own DA, no external. So I have to do the best what is in there.
Thanks again for your advise !
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