Good morning everyone!
after a period of absence, due to the birth of my son Luca, I finally completed a series of mods to my Marantz CD63 Ki:
Here are some bad photos taken with my old smartphone
Next step:
Many Thanks!!
after a period of absence, due to the birth of my son Luca, I finally completed a series of mods to my Marantz CD63 Ki:
- Dedicated power supply for DAC SERVO and DECODER,
- Pre-regulation at 9V and use of Raygulator + gryator on 5V (analog and digital) for each Chip
- All the masses of the mentioned power supplies have been brought to a single STAR GROUND
- Modification with 7809 controllers of the SERVO system (connection to STAR GROUND) and addition of decoupling CAPS
- A new DAC and SERVO clock with dedicated power supply
Here are some bad photos taken with my old smartphone
Next step:
- RAY's DOS with external power supply (2x18 30VA), there is no more space inside;
- 2x15v 50VA toroidal for SERVO SYSTEM and upgrade cap (813 814 with 2x22000uf 25v) and 1AT fuses
- COAXIAL cable for RF HF from CD PCB to MAIN PCB
- RELAY installation in place of existent MUTING (I still have several doubts about the procedure,
Many Thanks!!
Attachments
I recently got a nice original CD-67SE and have been thinking about how to proceed. I've noticed the hum the transformer makes when it's switched on, so if I were to mod this player I would find a suitable donor Marantz chassis, mount it underneath the CD player, and put all the transformers and other mods in there. Then discretely make short connections to the underside of the main board without wires running everywhere...
Well, I think I have read all these 21k posts in this thread but I would say that your idea is pretty original
Hello,
I would like to implement a new muting circuit with relay to replace the existing one with transistors, would you have any help for me?
In this thread there are many suggestions but they are not very clear to me;
Thanks so much for your help
Buy a relay module from eBay or Alibaba or solder it together yourself, solder out the muting transistors, connect the relay module - looking at the job history you are posting above - what is exactly your problem?
I don't know, this is the first time I try to work with a relay
but I think we need to connect a relay pcb to the emitter positions of QN06 and 05 after the output stage, and take the muting signal from the decoder (I think from the positions of the QN24 / 25 collectors) and the voltage from QN02
But then shouldn't the original tracks of the old muting also be disabled?
I also have a doubt about how to connect the relay pins to the signal and GND ...
I admit, however, that I have not yet thought about it much and I am not even an electronics professional but only an enthusiast, and not a long-time one,
I apologize for my English, even though I am assisted by G..gleTrans
Has anybody got or had what seems to be display noise?
My player is getting noise after so far into a cd. It's like a buzzing electrical noise, if I press pause and then press the other buttons I can here the noise changing. To stop it I eject the disc and it all stops. As in the noise fades as the tray is opening.
Then I can close and continue the cd until it starts again.
Hope that makes sense to someone
My player is getting noise after so far into a cd. It's like a buzzing electrical noise, if I press pause and then press the other buttons I can here the noise changing. To stop it I eject the disc and it all stops. As in the noise fades as the tray is opening.
Then I can close and continue the cd until it starts again.
Hope that makes sense to someone
If the level really does fade away (like turning a volume control down) then it is possible it might be power supply related (maybe, not guaranteed) such as failing cap. A scope check on the rails would be the next step.
Yes it does sound like a volume control, when the tray opens the noise dies down to nothing. Then close the tray and it's silent until part way through a cd the noise comes back. I'll have a check over the capacitors, could it be a dodgy solder joint on a cap and when the player is warming up it's coming loose? I'll have a good check over the caps and any other solder joints at the weekend.
I don't own a scope but may need to invest in one in the future.
I don't own a scope but may need to invest in one in the future.
A joint would be more likely to give an instant change. A cap just might allow a noisy rail to slowly return to normal as you ease the load on the supply by stopping it playing. It's a curious fault that needs a logical approach and basic tests to see if the rails are clean when the fault is apparent.
Thanks mooly, I went over a few caps last night and came across the cap on the servo pcb c126 it had a 470uf there and it measured 360uf. anyway I replaced it and the player has been on through the night and no sign of the noise. Just a slight bit background hiss but there is a bit of hum/buzz there. Only notice it when the music stops or quiet parts.
Interesting. It's worth pointing out that caps can fail in ways other than a loss of capacitance, the big problem is a rise in E.S.R. or equivalent series resistance. If that happens the cap can become very ineffective and particularly if it is in a power supply or high ripple situation.
Think of it like a new and an old 9 volt battery. As the old battery deteriorates it probably still reads about 9 volts, but it cannot deliver any current because the internal resistance has risen. Its a similar thing with the cap. Your 470uF cap might be down to 360uF but more importantly it might now behave as if there was say a 10 or 100 ohm in series with it.
Think of it like a new and an old 9 volt battery. As the old battery deteriorates it probably still reads about 9 volts, but it cannot deliver any current because the internal resistance has risen. Its a similar thing with the cap. Your 470uF cap might be down to 360uF but more importantly it might now behave as if there was say a 10 or 100 ohm in series with it.
Sorry to interrupt any ongoing conversations here but this forum is so lengthy that it is hard to find relatively current answers. My son owns a 63SE and I own a 67SE and they are all original. His is malfunctioning but mine works fine at the moment as it is in a secondary system and I was mostly into vinyl for most of its life. Anyway I am not a real capable electronic person but can tackle simple things electronically but pretty good at mechanical things. I wanted to buy replacement transports for our machines and see a number of them listed on eBay for example but have no idea who would be a trustworthy supplier. Any advice there? A secondary question is there a detailed explanation of restoring the power supply on these components that I could follow. I am not capable of doing all the mods but figure at least if I can keep these going we can always go to an external DAC if and when necessary. Thank you for any advice you can offer.
If you have two similar players then I would work on one and keep the second as reference.
That would mean reviving the 63SE first.
I have bought a laser unit (not the complete mechanism) from eBay for my own 67SE quite some years ago and fortunately it worked. But reading the internet forums is seems to be quite lottery - buy three of those and get (or assemble) one working one.
There is also another aspect - what is the amplifier you use (you write about listening to vinyl)?
In order to get audible sound improvements (after replacing the power rail capacitors as "generic preventive maintenance") you have to be sure that these are not "lost" in your amplifier.
There are good short component lists in the first posts of this thread and also more photos at http://raylectronics.nl/index_en.html .
That would mean reviving the 63SE first.
I have bought a laser unit (not the complete mechanism) from eBay for my own 67SE quite some years ago and fortunately it worked. But reading the internet forums is seems to be quite lottery - buy three of those and get (or assemble) one working one.
There is also another aspect - what is the amplifier you use (you write about listening to vinyl)?
In order to get audible sound improvements (after replacing the power rail capacitors as "generic preventive maintenance") you have to be sure that these are not "lost" in your amplifier.
There are good short component lists in the first posts of this thread and also more photos at http://raylectronics.nl/index_en.html .
Last edited:
Thanks for getting me started here madis64. The Ray's website is a wealth of information. I gather the laser unit availability is a lottery as you say and will see if anyone else out there might have some recommendations. If I decide to do some reworking of the power supply, where do most people order replacement capacitors and other needed small parts currently?
What is wrong with his 63SE?
Between Mouser and DigiKey you should find the caps you need. "Don't fix what ain't broke."