Marantz CD63 & CD67 mods list

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#11,382
RCruz said:


Before throwing anything away, you must determine the cause of your problem.

I replaced the driver chip and now it works perfectly.

If you want I will send you one of those chips.

Ricardo
Click to expand...

try eject button working fine actually i got another CD63 borrow from fren and try to swap the front panel still same problem 🙁
 
#11,388
Thomo said:


As I posted previously I tried the coax mod but that broke it.....

....it remains broken.

When it worked it sounded very, very nice. Fantastic texture to instruments. Detailed and smooth and warm. I also compared it with a current ~£900 quad cd player and wiped the floor with that also 😀

Click to expand...
Hi Lee

Reading what happened here http://www.diyaudio.com/forums/showthread.php?postid=1167155#post1167155 I am starting to wonder if the coax is really worthwhile.......:hot:

PS
My player is so good now, I never heard nothing like it... (Yes I already heard the SACD Krell and other big things... Last time I heard the new aluminium britisch big speakers powered by 6 big McIntosh after a swiss CDP... I kept wondering how better it would sound with my CD53).

The problem seems to be my growing need to modd (Am I serioulsly hooked ?):wave2s:
 
#11,389
Final overview

So as to be able to transmit my undecision I am explaining it from the beguining:

Initially I followed Ray´s pdf and understood the need for better psu. Filtering is mandatory and I still have the coils instead of resistors in the chips without dedicated psu.

After that I improved the output by removing output caps, replacing opamps, new psu for opamps, get some Brent´s Magic for these, move the spowers near the opamps... all in that order.

By this time I already did Mauro´s modd and the clock hack with very good results.

Than I read about feeding each chip with it´s psu and came the rayregs for the servo + psu (big improvement ), rayregs for dac + psu and finally a little bit more Magic for dac analog (what a difference!)

By this time it was evident I neede some better timing so I got one more psu and two sercal clocks (one on the dac, the other on the servo) All beautifully implemented and working the first time (Thanks Brent)

By now the CDP was sounding big but veiled and constrained... I needed to open the nozzle.... So in came the glorious DOS now fed by the +-15v spowers with BG from a board beautifully made by our good friend Lee. (Thanks😉 )

The sound was very big, well timed but lacking the stereo image I am used from the TT so I needed some more high frequency detail to get propper imagery so I started to worry everybody with the decoder psu and I successfully implemented using some precious psu boards that you know where to get from 😀

Now it is sounding wonderfully but sometimes I get some splashy high freq sounds that I believe can be tamed with the coax..... or maybe not.

Ricardo
 
#11,392
Ricardo, the coax mod is pretty easy to do, provided you are careful. I have successfully done it a few times now, lol.

I was a total noob when I posted those questions, and I'm pretty sure that the problem was something else entirely.

Essentially all you're doing is running a piece of wire from one place to another. You seem to be very careful and I don't think you'll have any trouble with it.

Cheers, Lee.
 
#11,394
Hi Ricardo

Thanks for the praise 😉

The coax mod is very easy, you can use 75ohm or 50ohm as both appear to have the same effect. I would go for some thinner coax as it does make it a little easier.

Connect the coax from U100 on RF pcb (cd mech pcb) to R501 on HF circuit near decoder.

Cut the track near U100 fo the signal no longer goes down the ribbon.

Lift R501 @ it's singnal input end.

Solder the coax onto U100 and use U101 for the gnd. Also link this gnd to star. Connect Coax up to R501 and no gnd at that end.

Brent
 
#11,400
JonHarrison said:


Can you post the part of the schematic where you wish to connect it ?
Click to expand...
Hi Jon
Please download the schematic from Ray´s site (First post) and follow Brent´s indications below.

I would apreciate some clarification regarding both types of coax.... Also, is there any difference between coax cable for audio signal and for digital signal ?

rowemeister said:
Hi Ricardo

Thanks for the praise 😉

The coax mod is very easy, you can use 75ohm or 50ohm as both appear to have the same effect. I would go for some thinner coax as it does make it a little easier.

Connect the coax from U100 on RF pcb (cd mech pcb) to R501 on HF circuit near decoder.

Cut the track near U100 fo the signal no longer goes down the ribbon.

Lift R501 @ it's singnal input end.

Solder the coax onto U100 and use U101 for the gnd. Also link this gnd to star. Connect Coax up to R501 and no gnd at that end.
Click to expand...
Thank you Brent

You made it very clear as usual.

Regards

Ricardo
 
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