Marantz CD63 & CD67 mods list

[UV101]

Same question on both 63 threads, totalling 3 of your 4 posts to date???

[higlander]

Originally Posted by UV101

Same question on both 63 threads, totalling 3 of your 4 posts to date???

Sorry for the double post. When I sent my thread out it did not appear in the forum and I though it did not go through. So I posted it again
I eventually discovered that there is time lag on the posting.

[Cal Weldon]

The time lag is because you are under moderation for the first few posts. You are free now.

[disco]

Guys, what was the output voltage again for a standard CD63, 2.0Vpp or 2.0Vrms?

If there's interest in a working CD63 platter, I've got one for sale. Headphone amps and muting transistors are removed. No warrenty, 25 euro without postage.

[Ben Hanke]

Hi higlander. I'm probably the last person you want to ask, but I think you're right with all of the connections above (you might want to wait for a second opinion though). You've got 18VAC for the output transformer? That will give you 30VDC... isn't that a bit much? Check the ratings on the caps in your output section. I followed Brent's guide for mine and used a 30VA 2x15VAC, which will give 25VDC.

[higlander]

Originally Posted by Ben Hanke

Hi higlander. I'm probably the last person you want to ask, but I think you're right with all of the connections above (you might want to wait for a second opinion though). You've got 18VAC for the output transformer? That will give you 30VDC... isn't that a bit much? Check the ratings on the caps in your output section. I followed Brent's guide for mine and used a 30VA 2x15VAC, which will give 25VDC.

Thanks Ben,
I recalled that it was Brent who recommend using 18VX2 for the output section. The filtering caps after the rectifiers are 35V rating so they should be OK. After that it goes to the regulators providing + and - 12V steady o/p to the opamps etc.

How about the Tx secondary connections ?

:-------- 12V (wire 1)
:
:
:--------- 0V (wire 2)

:---------- 12V (wire 3)
:
:
:---------- 0V (wire 4)


Shall I connect together wire 2 to wire 4 OR wire 2 to wire 3 for ground connection? Does that matter ?
Thanks

[UV101]

I think Brent was running 15v regs and a DOS. The 18v tx will work but the regs will work harder and get hotter!

With respect to the transformer secondaries, connect the transformers up with out the secondary windings connected to the player. Configure the windings and check the voltages with a meter. If the windings start to get warm and the voltages are not as expected, then it's wrong. It depends on the transformer make and how it's wound but I'd start with 2&3 together

Use Brent's diagrams to make sure you have it connected correctly and check with the service manual

[Puffin]

Originally Posted by Puffin

Just added some more 7805s (standard) a total of 7 so far (fancy ones and standard) SQ is definitely better

There are some resistors that carry 12v (measured at 11.60 or therabouts) is there anything to be gained by adding 12v regs in place of these? I am not sure if a 12v reg is possible given that the voltage is slightly less that 12v?

Rob.

Anyone?

[UV101]

Originally Posted by Puffin

Anyone?

Which resistors?

[Puffin]

Sorry don't know the position numbers without whipping the lid off

Does it matter?

EDIT: from memory there are 4 clustered together near where the HDAMS are/were, and some in other positions