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Thread Tools | Search this Thread |
2nd November 2011, 08:47 AM
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#21 |
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diyAudio Member
Join Date: Dec 2005
Location: Doncaster England
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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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2nd November 2011, 09:38 AM
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#22 |
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diyAudio Member
Join Date: Jun 2008
Location: Glasgow, Scotland
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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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"If only we'd known that iPads would unite to enslave the people they entertained." |
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22nd December 2011, 06:17 AM
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#23 |
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diyAudio Member
Join Date: Jan 2002
Location: Kraków, Poland
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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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31st January 2012, 08:21 PM
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#24 |
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diyAudio Member
Join Date: Dec 2007
Location: Vancouver, BC
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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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Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S |
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1st February 2012, 07:42 AM
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#25 |
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diyAudio Member
Join Date: Dec 2005
Location: Doncaster England
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Hi Ben
 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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7th October 2012, 09:07 PM
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#27 |
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diyAudio Member
Join Date: Oct 2012
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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 ? Thanks. |
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