Marantz CD63 & CD67 mods list - Page 748 - diyAudio
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Old 26th August 2007, 03:03 PM   #7471
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by SimontY
...... although for some reason it won't play Jazz at the Pawn Shop since the recent upgrades....

Simon

I once had a cd player that would only play Eric Clapton cds!!

Andy
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Old 26th August 2007, 03:06 PM   #7472
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by poynton
I once had a cd player that would only play Eric Clapton cds!!

Andy
I'd be happy with that... for a couple of hours at least!

When Brent returns from Spain he can have another play (he needed a holiday after fixing my CD63 again).
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Old 26th August 2007, 03:59 PM   #7473
Thomo is offline Thomo  United Kingdom
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Very nice Simon. Are those soon-to-be-replaced output caps 6.8uF?

Interesting how you managed to get the thing to work with the extra tx's and rectifiers out-board. I couldn't get it to run like that, had to rectify in the player. Mind you that was before the CF03 (delayed startup) tweak.

Lee.
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Old 26th August 2007, 09:54 PM   #7474
Glenn2 is offline Glenn2  United Kingdom
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Here's a crappy picture of mine these days - though I haven't even opened it for a couple of months which must be a record!
Just enjoying the sound.

What you can't see is the Zapfilter's toroid which is attached to the cross-brace and sits between the jaws of the disc drawer (though you can see its PSU filter board at the bottom and the wires going off to the transformer). The caps just sneak in under the drawer.

The 4 DAC regs are fed from a pre-reg that sits where the -12V supply filter cap used to be. This is fed from the analogue winding which is no longer needed for the analogue stage, leaving the digital supply feeding decoder, servo et al.

BTW, the Zapfilter has -ve outputs as well to provide a balanced output if you want it. I used the +ve ones to the RCAs and the -ve ones carried on shielded cables round to where the headphone connector is. So I now also have a superb sounding headphone out (albeit phase-inverted).
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Old 27th August 2007, 09:01 AM   #7475
Thomo is offline Thomo  United Kingdom
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Thought I'd get in before Brent comes and steals the show!

My CD67

Along the back is the clock reg, down the far side the 5v dac digital and the 5v invisus for analogue. I have 2 x 5v reg supplying the decoder and one spare for which I am going to add another tx and supply the tda1302 on the mech-board.

Star earth is on the Earth pin of iec socket.

Lee.
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Old 27th August 2007, 11:11 AM   #7476
Glenn2 is offline Glenn2  United Kingdom
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Nice work Lee... and all in a 63KI chassis!
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Old 28th August 2007, 08:48 AM   #7477
SimontY is offline SimontY  United Kingdom
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Looking first-rate guys!
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Old 28th August 2007, 06:21 PM   #7478
Thomo is offline Thomo  United Kingdom
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Hi guys. Av bin moddin' my CD67 again!

I have further separated the 5v rails on the decoder. Pin 59 - digital supply core now has it's own dedicated reg.

I have also cut the track for the 5v line to the TDA1302 on the mech board and supplied it with it's own reg. I've also replaced the cheapo elco with 100uF Rubycon ZA and replaced ceramic caps with 100nF x7r's.

Tomorrow I will be supplying these regs with their own tx, schottky's etc.

These mods are definitely worth doing if you have a CD67. Better presentation of finer details and tonal definition. Better separation all-round.

Lee.
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Old 28th August 2007, 06:22 PM   #7479
Thomo is offline Thomo  United Kingdom
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I still have one spare 5v reg in there doing nothing - any ideas on where to use it?

I plan to supply the laser driver with it's own tx etc like Brent did, but apart from that and the discrete output stage the only things I can do now I think are add some better quality regs.

Lee.
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Old 28th August 2007, 06:26 PM   #7480
disco is offline disco  Netherlands
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Quote:
Originally posted by Thomo
Thought I'd get in before Brent comes and steals the show!
Lee.
Nice job, more so when everything fits in place. Not like mine...
Click the image to open in full size.

I was working on a Low Noise reg for the Discrete Output when I came across the Jung Regulator (AKA ALW-reg). Is there any progress reported to this approach? The CD63 was considered quite noisy but audio levels are not that low. I wonder if it would benefit from a 'state of the art' power supply for -let's say- the buffer and DA converter.
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