Marantz Cd84

chasbmwe30 · 18th May 2005, 10:13 AM

CAN ANYONE HELP ME TO MOD THIS CD PLAYER? PAYED VERY LITTLE FOR IT BUT FEEL THAT SOUND QUALITY COULD BE IMPROVED SUBSTANTIALLY!! WHATS THE BEST PLACE TO START?

CHAS

Elso Kwak · 18th May 2005, 10:35 AM

Quote:

Originally posted by chasbmwe30
CAN ANYONE HELP ME TO MOD THIS CD PLAYER? PAYED VERY LITTLE FOR IT BUT FEEL THAT SOUND QUALITY COULD BE IMPROVED SUBSTANTIALLY!! WHATS THE BEST PLACE TO START?

CHAS

Did you press the CapsLock key?

Best way to start is the clock.
http://www.diyaudio.com/forums/showt...928#post199928

Elso Kwak · 18th May 2005, 12:27 PM

Or this one:
http://www.diyaudio.com/forums/showt...6884#post76884

drews · 18th May 2005, 12:29 PM

Hi Elso,

I have read on your KWAK-CLOCK-text.doc this:

"The KWAK-CLOCK will work with any crystal in the range 8 to 24.576 MHz." but Marantz cd-84 had crystal 4 MHz.
It is possible mod your Clock for work at 4MHz?

Bye
Andrea

Elso Kwak · 18th May 2005, 12:38 PM

Quote:

Originally posted by drews
Hi Elso,

I have read on your KWAK-CLOCK-text.doc this:

"The KWAK-CLOCK will work with any crystal in the range 8 to 24.576 MHz." but Marantz cd-84 had crystal 4 MHz.
It is possible mod your Clock for work at 4MHz?

Bye
Andrea

Hi Andrea, In fact it will work with the 4MHz crystal but it will not do any good as this clock is probably for system control (U COM). You need to replace the clock feeding the decoder and/or servoproccessor

drews · 18th May 2005, 12:52 PM

Hi Elso,

I have chech now the service manual.
The cd-84 have another crystal on U-COM Servo but the frequency clock is 3,58MHz.
I don't understand your advice.
Sorry, please explain better the question because I don't understand .

Thanks
Andrea

rfbrw · 18th May 2005, 02:13 PM

There should be xtal next to one of the SAA70x0 chips, probably the SAA7000.

Elso Kwak · 18th May 2005, 02:25 PM

Quote:

Originally posted by drews
Hi Elso,

I have chech now the service manual.
The cd-84 have another crystal on U-COM Servo but the frequency clock is 3,58MHz.
I don't understand your advice.
Sorry, please explain better the question because I don't understand .

Thanks
Andrea

Hi, Please post a picture of the schematic with the crystal(s) involved.

drews · 18th May 2005, 04:46 PM

Hi, there is a crystal on UCOM SERVO (3,58MHz) and another one on the SAA7000 (4 MHz) for synchroniz SAA7020-SAA7000 and SAA7030.

Bye
Andrea

drews · 18th May 2005, 04:48 PM

And here the other crystal on SAA7000

Bye
Andrea

18th May 2005, 10:13 AM	#1
chasbmwe30 diyAudio Member Join Date: May 2005 Location: northampton england	Marantz Cd84 CAN ANYONE HELP ME TO MOD THIS CD PLAYER? PAYED VERY LITTLE FOR IT BUT FEEL THAT SOUND QUALITY COULD BE IMPROVED SUBSTANTIALLY!! WHATS THE BEST PLACE TO START? CHAS

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18th May 2005, 12:27 PM	#3
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	Or this one: http://www.diyaudio.com/forums/showt...6884#post76884

18th May 2005, 12:29 PM	#4
drews diyAudio Member Join Date: Jan 2005 Location: Roma	Hi Elso, I have read on your KWAK-CLOCK-text.doc this: "The KWAK-CLOCK will work with any crystal in the range 8 to 24.576 MHz." but Marantz cd-84 had crystal 4 MHz. It is possible mod your Clock for work at 4MHz? Bye Andrea

18th May 2005, 12:52 PM	#6
drews diyAudio Member Join Date: Jan 2005 Location: Roma	Hi Elso, I have chech now the service manual. The cd-84 have another crystal on U-COM Servo but the frequency clock is 3,58MHz. I don't understand your advice. Sorry, please explain better the question because I don't understand . Thanks Andrea

18th May 2005, 02:13 PM	#7
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	There should be xtal next to one of the SAA70x0 chips, probably the SAA7000.

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