Marantz CD63 & CD67 mods list - Page 866 - diyAudio
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Old 19th December 2007, 03:38 PM   #8651
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Have a look in group buy in the Pink Fish Media forums.
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Old 19th December 2007, 04:08 PM   #8652
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I have re-housed my CD63 in a wooden case along with a Monica2 NOS DAC.

I have taken the spdif signal for the Monica module direct from the board (having removed the PCB mounted socket. I have taken the positive signal from the rear peg (fitted by myself) and the return from the front one. I have not used the other rear connection, which appears to be designed to be grounded to the chassis, but I have attached a lead to it for use if needed.

I cannot get a lock on my DAC (which works OK from an alternative spdif signal). Can someone start me off on my debugging route please? Maybe it is a chassis grounding issue, or have I got my connections mixed up.

TIA.

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Old 19th December 2007, 04:10 PM   #8653
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I have looked at the schematic and what I have done seems correct unless there is some issue relating to grounding.

I posted here a few weeks back, but got no response.

Please help.

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Old 19th December 2007, 04:25 PM   #8654
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by dublin78
.............. I have taken the positive signal from the rear peg (fitted by myself) and the return from the front one. I have not used the other rear connection, which appears to be designed to be grounded to the chassis, but I have attached a lead to it for use if needed.


I think you may have the connections the wrong way round.

The 2 rear connections are ground and the other is signal.


Andy
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Old 19th December 2007, 05:52 PM   #8655
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Poynton: This does not appear to be the problem, but thanks anyway.
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Old 19th December 2007, 07:18 PM   #8656
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A general question about caps, as I'm havin' a look in a CD52SE:
it features some Cerafine and some Slimic, are they dead? It's quite an old player but my friend uses it very few, far less than I've used my CD53! Maybe it has played CD for 2 or 3 hours a week since then...
May I change these audio caps for left RJH and such or may I leave them until change them for BG or audio grade caps?

Thanks!
Matthieu

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Old 20th December 2007, 02:59 PM   #8657
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Matthieu, as far as I know caps will still age even if they're not used, although I think not as much as if they were used a lot.

Does anyone know what could cause clipping during loud passages on the output of a cd67? This is not my player and has lm4562 opamps.

Lee.
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Old 20th December 2007, 03:03 PM   #8658
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I would leave those caps until you can replace them with BG or similar.

Brent
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Old 20th December 2007, 03:05 PM   #8659
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Lee

It sounds like the input is too high (overloading). Scope both channels all over the opamps and see if its high anywhere.
Could be a damaged track/pad etc around them...

...or the opamp is faulty.

Brent
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Old 20th December 2007, 03:54 PM   #8660
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I had distortion years ago on a CD63 (on only one channel).
It sounded like clipping, as it was mostly heard on loud passages.
It turned out to be faulty muting transistors.
I've no idea if they're still present on this player, but its an easy suspect to eliminate from your enquiries.
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