Marantz CD63 & CD67 mods list - Page 995 - diyAudio
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Old 13th May 2008, 07:55 PM   #9941
avr300 is offline avr300  Denmark
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You could consider a separate output circuit. Then the problem can be solved once for all. Building instructions at Ray's site and if you don't want the DIY approach, Brent can sell you a turnkey solution.

No, I don't think the mod will introduce any dc offset, but you might measure before plugging it into your amp.
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Old 13th May 2008, 08:07 PM   #9942
RCruz is offline RCruz  Switzerland
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After the clock, I will surelly build an discreet output stage.

I will leave this GND separation for that time.

Thank you for your help.

Ricardo
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Old 14th May 2008, 06:31 AM   #9943
pzogal is offline pzogal  Europe
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Default skipping update

Hi Ricardo & Brent

Strange thing happened, the CD doesn't skip anymore What I did was a bunch of mods from Ray's list - almost all - except the Bessel alignment and I didn't use the PPS caps in the output filter. There are no smd pieces either Anyway, what else I did, I put some blue tac (in my case the stuff is white ) on the puck + 2 coin on the top (expensive, isnt it ? ). The lens oscillates at some points but I have an impression it's now a bit less.
Didn't change the drivers yet although I got them from RS components.
I also wanted to put new resistors into the HF path but as it works it's nothing hasty now. I suppose the last major mod will be the clock. The rest will be law of diminishing returns since there are other bottlenecks in the system.
Thanks all for help!

Pawel
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Old 14th May 2008, 07:29 AM   #9944
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Default Re: TCA0372 substituting

Quote:
Originally posted by ahiukka

Then I had trouble sourcing TCA0372, I began to look for substitute and after searching for a long time I found one which could substitute it; L2720. And it did!
This chip has some lower operating voltage range which has no meaning in this application because it still operates in specs. And slightly higher typical slew rate

So my point is that if someone else is having trouble sourcing TCA0372, you can substitute it with L2720.

-Antti
Hi

Nice one good and useful post thanks

Brent
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Old 14th May 2008, 02:44 PM   #9945
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Can anyone guess what cd player i'm getting for the bargain price of 150?

Brent
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Old 14th May 2008, 06:06 PM   #9946
Thomo is offline Thomo  United Kingdom
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I bet I can, lol

Lee.
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Old 14th May 2008, 06:36 PM   #9947
RCruz is offline RCruz  Switzerland
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Tell us.... please
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Old 14th May 2008, 06:42 PM   #9948
RCruz is offline RCruz  Switzerland
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Default Re: skipping update

Quote:
Originally posted by pzogal
Hi Ricardo & Brent

Strange thing happened, the CD doesn't skip anymore What I did was a bunch of mods from Ray's list - almost all - except the Bessel alignment and I didn't use the PPS caps in the output filter. There are no smd pieces either Anyway, what else I did, I put some blue tac (in my case the stuff is white ) on the puck + 2 coin on the top (expensive, isnt it ? ). The lens oscillates at some points but I have an impression it's now a bit less.
Didn't change the drivers yet although I got them from RS components.
I also wanted to put new resistors into the HF path but as it works it's nothing hasty now. I suppose the last major mod will be the clock. The rest will be law of diminishing returns since there are other bottlenecks in the system.
Thanks all for help!

Hi Pawel

These are very good news.
I am very happy for your success.

What does it sound like ?


PS:
After replacing TCA0372 on the focus driver, my lens sopped oscilating.

Sound is now very good and detailed.

Ricardo
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Old 14th May 2008, 06:43 PM   #9949
RCruz is offline RCruz  Switzerland
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Default Re: TCA0372 substituting

Quote:
Originally posted by ahiukka
Hi.

My CD53 had a problem, first it worked all fine and in the next moment it started to pull drawer back and spin disc at very high rate. My first thought was that TCA0372 which operates the drawer and disc motor has come to its end. Well, after all I found out it was the that chip exactly(QM01), but it had burned also resistor R164.
Then I had trouble sourcing TCA0372, I began to look for substitute and after searching for a long time I found one which could substitute it; L2720. And it did!
This chip has some lower operating voltage range which has no meaning in this application because it still operates in specs. And slightly higher typical slew rate

So my point is that if someone else is having trouble sourcing TCA0372, you can substitute it with L2720.

Thank you Antti
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Old 14th May 2008, 07:07 PM   #9950
avr300 is offline avr300  Denmark
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Ray, 50 more posts

Are you ready to take number 10.000 ?
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