Marantz CD63 & CD67 mods list

[fabbs]

wow, thank you for the very fast responses. I'll double check the greasing (nope, I have to admit I did not pay particular attention when installing, I am THAT naive).

As for the cables, can I just double check which one is the possible culprit? Basically, we are talking of one of three. The ribbon connector and the 2 wire connectors (the 4 pin one does the drawer motor and sensor, the other 6 pin one does the spindle motor, the laser position motor, and the laser position switch). I assume the first one I should be looking at is the 6 pin one, or is it the ribbon connector?

Best

Benjamin

 

[Fidelity Audio]

It is always the ribbon from mech to main pcb. Measuring out always shows no faults.

Brent

 

[RCruz]

Fitted the parts mentioned yesterday. Hard to tell at work of much improvement but my dire straits test disc sounds slower with a small amount of improved treble crispness which is usually a good sign.

I have put a few pics in THIS FOLDER

Hi Brent

How does it sound now ?

Ricardo

 

[Fidelity Audio]

Up to now there is a little more clarity, crisper treble and better bass extension. All little gains over what was already there.
I can't really say anything until the weekend as my player takes a good 3 days to settle to its best.

Brent

 

[RCruz]

If it proves worthwile, please report ... I am very interested in this servo psu mod.

Ricardo

 

[Fidelity Audio]

The Servo psu mod is a superb improvement, it pushes what the servo clock etc did to a new level.

All I have done this time is improve it further

I swapped 2x 3.2VA tx for 2x 7VA, swapped 4x 16v 220uF Silmics for 16V 470uF ZA and added the extra base plate for more mass.

Brent

 

[hotiron]

Hi guys am I the first to try removing the Main processor from the chain and
treating it to its own proprietary power supply. all I can say is WOW!!!!

 

[Fidelity Audio]

Hi

Yes it makes a nice change. I run mine off a 30Va tx (shared by motor/laser driver ics) to the standard 5v reg (nothing else runs off this reg).
I had thought of popping the processor and display pcb onto a dedicated small tx and reg. Infact you have me thinking of it again . Room is an issue though.

What gains did you find, I got better detail and fluidity (less muddled sound).

Brent

 

[RCruz]

Hi

Yes it makes a nice change. I run mine off a 30Va tx (shared by motor/laser driver ics) to the standard 5v reg (nothing else runs off this reg).

I have exactly the same situation here but I am still using the stock tx for the motor/laser drivers and main cpu. (Shhhhh, I am still using a sprague 500.000uF 6.3v after the digital reg, and everytime I remove this cap, I loose spatiality and smoothness)

So, isolating the cpu would eliminate any psu line dirt to enter the drivers.

Here I go again

Ricardo

PS:
This is an old pic.... actually I use only the sprague... the NEC caused the fuses to glow at power on so I removed it and the sound is even better now.... so mutch for complicated bypassing in the psu lines.

 

[Fidelity Audio]

Hehe - big caps always look uber

Have you measured the cap to see what uF it's at these days?

Brent

 

[RCruz]

No but I will do it.... soon to be reported.

 

[Fidelity Audio]

Always interesting to know.

I've updated my mods list if anyone is interested PDF

Brent

 

[SimontY]

Not many meters could measure 500000uF lol

 

[Fidelity Audio]

Mine can

Brent

 

[Malefoda]

Hi guys!
I see you're building power plant now

 

[Chivvyp]

Digital out transformer

Hi,

Has anyone upgraded the digital out transformer, LT01 ? I saw some advice earlier in the forum to use 76601/3C from Murata or the S22083 from Newava but I didn't see if anyone actually did it and found any gains.

Regards

Pete

 

[RCruz]

Hi Pete

I did think of it in the beguinning, but after the very good mods done inside my CDP, I do not see the point in using external devices to process the signal.

Ricardo

 

[UV101]

The Servo psu mod is a superb improvement, it pushes what the servo clock etc did to a new level.

All I have done this time is improve it further

I swapped 2x 3.2VA tx for 2x 7VA, swapped 4x 16v 220uF Silmics for 16V 470uF ZA and added the extra base plate for more mass.

Brent

Looked awesome in the workshop! I'm now in the "seen it heard it" club. TY!

I bet it did sound good when you got home!

 

[Fidelity Audio]

You saw it before the new tx

Yes the improvements were noticable at home, sadly the work speakers don't do it justice.

Brent

 

[stueyh]

I've done the HDAM bypass, replaced the opamps with 4562's & fitted a new clock with its own PSU. Just checking the DC offset, I have 15mV on the L channel and 45mV on the right. Do you think 45mV is to high??