Marantz CD63 & CD67 mods list - Page 1972 - diyAudio
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Old 7th August 2013, 09:49 AM   #19711
lymmlad is offline lymmlad  England
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Quote:
Originally Posted by 6h5c View Post
Yep, it's the same.

This PDF lists the differences.
Brill! Thanks.
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Old 7th August 2013, 01:42 PM   #19712
timjar is offline timjar  England
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On DOS board how do I choose R11 470r or 560r, I thought at first it depended on which LED you used, but all 4 LEDs in Rays component list have a 2V forward voltage and 20ma current.
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Old 8th August 2013, 07:47 AM   #19713
6h5c is offline 6h5c  Netherlands
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Just insert one value and then measure the voltage across it. Divide the voltage by the resistance and this will give you the current running through it, I = U / R (Ohm's Law).

It should be close to 2mA or 0,002A. If it is a bit low, you can lower R11, if it is a bit high, you can raise R11. The current depends on the actual LED forward voltage which varies a bit per LED. This way, you'll be able to tweak it :-)

Ray
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Old 17th August 2013, 01:49 PM   #19714
timjar is offline timjar  England
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Default time to break the silence!

Thanks for that last reply Ray, I'm going to break the silence with some more questions.

For the power supply to Dos I am thinking of using this board
$(KGrHqIOKo8FGKL,7oYzBRp)RS1UGg~~60_35.JPG
after the toroid, followed by this
SP-2-PCB-ONLY1.jpg

before dos (the 4 diodes replaced by 2 jumpers)

just want to know the best cost effective electrolytic capacitors to use on the 2 boards, would it be Panasonic FM on the 1st board then on the second board C1 and C2 FM's and C3 and C4 FC's
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Old 17th August 2013, 07:06 PM   #19715
6h5c is offline 6h5c  Netherlands
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I'd rather use just the second board. It has room for rectifier diodes and smoothing caps, just like the first one. There are a few extra ceramic caps, but you can easily stick them on the underside of the second board.

Panasonic FM and FC are good choices, Rubycon comes to mind as well, and you can have a look at Elna Cerafine or Silmic to use at the output-side of the regulators, or on the DOS board.

Regards,

Ray
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Old 19th August 2013, 11:53 AM   #19716
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Default Separate regs for DAC

I have done a lot to my CD63 KI player, but I haven't reclocked or added separate regs. Now I'm going to dive into adding separate regs. I will start with three for the DAC, just using plain simple 7805s.
RD01 and RD04 for digital and clock. But what is the best placement for analogue DAC. And where should I tap input and ground to these three regs?
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Old 19th August 2013, 12:55 PM   #19717
timjar is offline timjar  England
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Default polarity of elecs

Just been soldering the parts at the end of Rays KI list, some of the ceramics replaced with electrolytics, it was easy deciding the polarity such as C152, on the ones where it wasn't obvious I put negative to ground, I'm hoping thats OK, otherwise it looks like getting my desoldering pump out again.
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Old 19th August 2013, 04:41 PM   #19718
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Default regs

Quote:
Originally Posted by stefanom View Post
I have done a lot to my CD63 KI player, but I haven't reclocked or added separate regs. Now I'm going to dive into adding separate regs. I will start with three for the DAC, just using plain simple 7805s.
RD01 and RD04 for digital and clock. But what is the best placement for analogue DAC. And where should I tap input and ground to these three regs?
U200 is the analog feed for the dac, use the top screen for earth and +12v to give some headroom.
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Old 19th August 2013, 05:14 PM   #19719
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Quote:
Originally Posted by bikeral10 View Post
U200 is the analog feed for the dac, use the top screen for earth and +12v to give some headroom.
"use the top screen". Do you mean scrape the PCB and solder there?
Do I need some additional components on the input or output of the reg?
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Old 19th August 2013, 08:10 PM   #19720
timjar is offline timjar  England
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Default op amps

Just been glancing athttp://my.opera.com/opamp/blog/2006/...7-in-cd-player

wonder if anyone else has read it and considered connecting transistors to opamps, or even already tried it.
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