Marantz CD63 & CD67 mods list - Page 1819

Ben Hanke · 24th May 2012, 07:49 AM

Does anyone have any idea why my sled moves uncontrollably outwards when I switch the unit on from cold, but then works fine when switched off and on again while the capacitors still have some charge?

Ben Hanke · 30th May 2012, 07:43 PM

This thread is deader than my player, which incidentally is dead now.

I'm planning a postmortem on the weekend.

RCruz · 30th May 2012, 08:34 PM

What did you do before that problem happened ?

Ben Hanke · 30th May 2012, 08:43 PM

Raised the driver regs to 12v.

RCruz · 08:58 PM

How did you do that ?

Did you replace the stock resistors with regulators ?

Do you use the same psu to power the 12vregs and the sled mechanism ?

Ben Hanke · 31st May 2012, 04:20 AM

Yes, I replaced the stock resistors with 12v regs, and yes it's the same PSU. Voltage to drivers is pretty much bang on +/- 12v. I wondered if it was a timing thing - e.g. a race between my servo clock PSU and the main smoother on the positive rail.

Anyway, I've broken something while playing around with it and can no longer read discs :-(

bikeral10 · 31st May 2012, 07:28 AM

Dont worry ben ive done a similar thing, I smoked a driver ic good job it was only a spare and not my main player. Are driver ic s available?.
cheers alan

RCruz · 31st May 2012, 09:53 AM

Maybe a driver IC... quite easy to get and not so easy to replace... I placed an IC holder so I can swap IC's if they burn.

Look at the tracks between the 12regs and the first IC and also back to the PSU... these are quite thin and caused my initial issues.

Thomo · 31st May 2012, 11:21 AM

A big tx + psu makes a bigger improvement than regulating those driver ic's imho

Thomo · 31st May 2012, 11:25 AM

Quote:

Originally Posted by Ben Hanke

I wondered if it was a timing thing - e.g. a race between my servo clock PSU and the main smoother on the positive rail.

:-(

It could be that the clock psu takes too long to "boot up", I had similar problems once or twice before. There is a charge-time circuit with a 4.7uF cap (I think) near the decoder. Swapping that cap for a larger one 100uF or so lengthens the time the player takes to start up and can sort the issue.

24th May 2012, 07:49 AM	#18181
Ben Hanke diyAudio Member Join Date: Dec 2007 Location: Vancouver, BC	Does anyone have any idea why my sled moves uncontrollably outwards when I switch the unit on from cold, but then works fine when switched off and on again while the capacitors still have some charge? __________________ Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S

30th May 2012, 07:43 PM	#18182
Ben Hanke diyAudio Member Join Date: Dec 2007 Location: Vancouver, BC	This thread is deader than my player, which incidentally is dead now. I'm planning a postmortem on the weekend. __________________ Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S

30th May 2012, 08:34 PM	#18183
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	What did you do before that problem happened ? __________________ RC

30th May 2012, 08:43 PM	#18184
Ben Hanke diyAudio Member Join Date: Dec 2007 Location: Vancouver, BC	Raised the driver regs to 12v. __________________ Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S

30th May 2012, 08:53 PM	#18185
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	How did you do that ? Did you replace the stock resistors with regulators ? Do you use the same psu to power the 12vregs and the sled mechanism ? __________________ RC Last edited by RCruz; 30th May 2012 at 08:58 PM.


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31st May 2012, 04:20 AM	#18186
Ben Hanke diyAudio Member Join Date: Dec 2007 Location: Vancouver, BC	Yes, I replaced the stock resistors with 12v regs, and yes it's the same PSU. Voltage to drivers is pretty much bang on +/- 12v. I wondered if it was a timing thing - e.g. a race between my servo clock PSU and the main smoother on the positive rail. Anyway, I've broken something while playing around with it and can no longer read discs :-( __________________ Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S

31st May 2012, 07:28 AM	#18187
bikeral10 diyAudio Member Join Date: Oct 2010 Location: walsall west mids uk	Dont worry ben ive done a similar thing, I smoked a driver ic good job it was only a spare and not my main player. Are driver ic s available?. cheers alan __________________ Aint broke it yet but im tryin. ( favs Fast women and even faster bikes)

31st May 2012, 09:53 AM	#18188
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	Maybe a driver IC... quite easy to get and not so easy to replace... I placed an IC holder so I can swap IC's if they burn. Look at the tracks between the 12regs and the first IC and also back to the PSU... these are quite thin and caused my initial issues. __________________ RC

31st May 2012, 11:21 AM	#18189
Thomo diyAudio Member Join Date: Nov 2006	A big tx + psu makes a bigger improvement than regulating those driver ic's imho __________________ /\/\/\/\/\/\/\/

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