Marantz CD63 Basic upgrade overview / guide - Page 3 - diyAudio
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Old 2nd November 2011, 08:47 AM   #21
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The LM4562NA is the same as the LME49720NA

The LME49720HA is the metal case version and offers better dynamics, treble and bass detail. Odd as they share the same data sheet!

Brent
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Old 2nd November 2011, 09:38 AM   #22
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Wow, I'm obviously totally out of the op-amp loop! As soon as I read that it all came back to me from all those years ago

I need to get back to my CD-63SE someday, last thing that happened was the building of some LM317/LM337 based regulator circuits to replace some of the stock 7805/7905 (?) and the next thing you know the CD player started to sound hissy as hell... I really should just put the 78xx/79xx regs back in!
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Old 22nd December 2011, 06:17 AM   #23
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I have CD-63 to be upgraded. I'm not sure what low noise regulators to use. Could you reccomend me some pieces?
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Old 31st January 2012, 08:21 PM   #24
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Hi Brent, would you mind confirming the correct connections for the display transformer secondaries? This is what I have, but it doesn't work.

+---- 12v -> 16.4ohm -> u267
|
|
+---- 0v -> u309

+---- 12v -> u311
|
|
+---- 0v -> u312

If this is correct then it may just be a broken trace somewhere. That section of the PCB is getting pretty flakey.

Thanks,

Ben
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Old 1st February 2012, 07:42 AM   #25
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Hi Ben

Click the image to open in full size.

You have got that wrong

Right lets see.... The 1st 12V winding with the resistor connects to U311 and U312. This is for the display heaters. After the resistor you should have approx 3.6V dc. If this dc is a little high you may have to raise the res value to drop it a little. There is a bit of leeway with this voltage . I also use a high watt resistor as it can get warm.

The second 12V winding connects U305 (or U267) and U309 (gnd)

Brent
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Old 1st February 2012, 07:51 AM   #26
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Thanks a million, Brent. I'll try to rectify this tomorrow. Hopefully I didn't fry anything... :-/
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Old 7th October 2012, 09:07 PM   #27
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Hi Brent,

One more thing in the secondaries it normally has two groups of connections like this

:----- 12V
:
:----- 0V

:----- 12V
:
:----- 0V

Shall I connect the two wires with 0V together and connect it to ground ?

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