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Sony CDP-C725 "NO DISC" error

Digital Sources | Audiokarma Home Audio Stereo Discussion Forums - audiokarma.org
Hello all,

First post here. Recently I had purchased a Sony CDP-C725 CD changer for $30.00 at a local thrift store. It looked very clean and still had the stickers affixed to the front. So far, so good.

Sure enough, get it home and I then have the "NO DISC" error come up with any disc inserted, including brand-new CDs.

I have been working as an electronics technician with several industry certifications, so this doesn't worry me too much. Ordered a Service Manual from eBay as well as a new laser unit, which only set me back about another $30.00 or so. Got them both in the mail today.

Now, on occasion, I've had luck with this sort of problem on CD boom boxes merely by disconnecting the ribbon wire and then reconnecting it. Any oxidation present that would cause any resistance is scraped off by the action of disconnecting and reconnecting the ribbon wire.

With that said, I am just wondering if anyone has any experience with these units — anything I need to look out for, etc. At the point that I get this up and running, then it will get the requisite opamp, capacitor and diode mods.

But I'm definitely interested in getting this working again. I am intrigued by the DSP that is included with this unit particularly as my bonus room is rather acoustically dead. The ability to mix in a small amount of room or hall reverb is appealing, if only to gain some air or ambiance to the sound. Years ago, I attempted to use an old Ibanez SDR-1000 Digital Reverb in the system, but it made the sound rather digitized or pixelated, no doubt in part to the CD deck's digital to analog conversion and then being converted back to digital only to be converted once again to analog. Add to that the age of the SDR-1000 and that it was designed for guitar rigs and perhaps PAs.

Anyone have a Sony CDP-C725? Again, any quick fixes? Anything I need to watch out for? Any warnings? Any good modifications? Please let me know.

Thanks in advance.

 
Date: Jan 14, 2018   


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