Marantz CD40

Jiiim · 6th November 2002, 03:02 PM

Does anyone perchance have a circuit diagram or circuit layouts for a Marantz CD40?

I'm going to be modifying one of these soon, and these documents would be a great help.

Thanks,

Jim.

halojoy · 6th November 2002, 03:05 PM

have you searched the archives?

Jiiim · 6th November 2002, 03:07 PM

Yes, I have.

Jim.

fdegrove · 6th November 2002, 11:40 PM

Hi,

In case you have a feel for electonics go for the usual suspects by instinct.
Start from the output and work your way down.

In the mean time someone might put a cicuit diagram forward.

What mods do you want to carry out anyways?

Regards,

Jiiim · 7th November 2002, 07:43 AM

Hi Frank,

Yup, this is my planned method of approach.
I was just hoping that someone had a diagram as this
obviously makes things a lot easier.

Planned mods (in no particular order)

Better power supplies, and more of them.
Lots of ideas here regarding isolation between digital
and analog domains (which is notoriously bad on marantz players)

Lower clock jitter - probably with a kwak clock, but may go further
and reclock everything rather than just the source clock.

Descrete IV stage - largely based on the Jocko simple IV, but I have a few ideas for improvements there.

Descrete output and filter stages. A bessel filter is my intention here.

Any more? Just have to wait and see.

Jim.

TDA1540 · 1st May 2004, 08:20 PM

not wanting to clutter this forum with all sorts of new threads,I decided to hijack this one.

I came across this player on ebay,called a Marantz cd40.
However,it is rather different.
It is not what I would recognize as a cd40.

any comments?

http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting

jean-paul · 2nd May 2004, 06:40 AM

There were 2 types CD40. This one is a very old one and from about the same time as Philips CD104 IIRC.

The CD40 you probably know is from the same series as CD60 ( plastic case, TDA1541A, bleuish green tube displays etc ).

TDA1540 · 2nd May 2004, 10:10 PM

Indeed Jean Paul,the one I have is like a philips 600-series.
Do you have any idea what is inside this earlier machine?

6th November 2002, 03:02 PM	#1
Jiiim diyAudio Member Join Date: Aug 2002 Location: England	Marantz CD40 Does anyone perchance have a circuit diagram or circuit layouts for a Marantz CD40? I'm going to be modifying one of these soon, and these documents would be a great help. Thanks, Jim.

6th November 2002, 11:40 PM	#4
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	THE USUAL... Hi, In case you have a feel for electonics go for the usual suspects by instinct. Start from the output and work your way down. In the mean time someone might put a cicuit diagram forward. What mods do you want to carry out anyways? Regards, __________________ Frank

7th November 2002, 07:43 AM	#5
Jiiim diyAudio Member Join Date: Aug 2002 Location: England	Hi Hi Frank, Yup, this is my planned method of approach. I was just hoping that someone had a diagram as this obviously makes things a lot easier. Planned mods (in no particular order) Better power supplies, and more of them. Lots of ideas here regarding isolation between digital and analog domains (which is notoriously bad on marantz players) Lower clock jitter - probably with a kwak clock, but may go further and reclock everything rather than just the source clock. Descrete IV stage - largely based on the Jocko simple IV, but I have a few ideas for improvements there. Descrete output and filter stages. A bessel filter is my intention here. Any more? Just have to wait and see. Jim.

2nd May 2004, 06:40 AM	#7
jean-paul diyAudio Member Join Date: Sep 2002 Location: The Netherlands	There were 2 types CD40. This one is a very old one and from about the same time as Philips CD104 IIRC. The CD40 you probably know is from the same series as CD60 ( plastic case, TDA1541A, bleuish green tube displays etc ). __________________ It's only audio

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6th November 2002, 03:05 PM	#2
halojoy On Hiatus Join Date: Nov 2002	have you searched the archives?

6th November 2002, 03:07 PM	#3
Jiiim diyAudio Member Join Date: Aug 2002 Location: England	Yes, I have. Jim.

1st May 2004, 08:20 PM	#6
TDA1540 diyAudio Member Join Date: Feb 2004 Location: Ehv	not wanting to clutter this forum with all sorts of new threads,I decided to hijack this one. I came across this player on ebay,called a Marantz cd40. However,it is rather different. It is not what I would recognize as a cd40. any comments? http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting

2nd May 2004, 10:10 PM	#8
TDA1540 diyAudio Member Join Date: Feb 2004 Location: Ehv	Indeed Jean Paul,the one I have is like a philips 600-series. Do you have any idea what is inside this earlier machine?

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