marantz cd 65 modify to non-os /mute signal

pengxy · 14th August 2004, 03:16 AM

I rewired player to non over-sampling but bypassed saa7220 mute signal.
I don't know how to make the muting fuction working.
chips:mab8441,m4803a ,saa7220,tda1541
Anybody would help.

jean-paul · 14th August 2004, 07:49 AM

http://xoomer.virgilio.it/hi_fi/com.htm

pengxy · 15th August 2004, 02:23 AM

It works ok when bypass saa7220 but it has pops and crackles when skipping tracks and when the music starts. In my marantz cd65fb I can't find saa7210. To restore the muting function I don't know where to connect . It might be M4803a (don't have datasheet).

guido · 15th August 2004, 10:31 AM

Hi,

My cd650 has a M4804A instead of the 7210. Never got much info on it, but i can swap with a 7210 and the player still works.

If the 4803 is also 40 pens, checkout pen 11 with a scope or multimeter. You should see it change state when playing starts.

The MAB is a controller.

Regards,

pengxy · 17th August 2004, 02:09 PM

I don't have saa7210 to swap but m4803a pin 11 is mute . The muting function of my player is ok when pin 23 of saa 7220 connected to pin11 of m4803a. I bypassed digital filter with muting fuction restored.

thanks a lot GuidoB & jean-paul

pengxy

herringboy · 15th September 2004, 04:11 AM

Hi, I just picked up on this tread. I have just bought a CD65 and know nothing about its quality, performance etc.

It sounds OK but my modified Denon DCD615 is a lot more detailed. Any suggestions on some basic mods I could make or info on machine is welcome. (I am a complete novice at mods the denon was done proffesionally).

cheers
Carl

pengxy · 1st October 2004, 08:52 AM

hi
1.The decouple caps of tda1541 are good to be replaced by some hi-quality caps .
2. If you don't like ic 's sound put tube after tda1541 .

14th August 2004, 03:16 AM	#1
pengxy diyAudio Member Join Date: Feb 2004 Location: shanghai	marantz cd 65 modify to non-os /mute signal I rewired player to non over-sampling but bypassed saa7220 mute signal. I don't know how to make the muting fuction working. chips:mab8441,m4803a ,saa7220,tda1541 Anybody would help.

14th August 2004, 07:49 AM	#2
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: Germany	http://xoomer.virgilio.it/hi_fi/com.htm __________________ It's only audio

15th August 2004, 10:31 AM	#4
guido diyAudio Member Join Date: Mar 2002 Location: diepe zuiden	Hi, My cd650 has a M4804A instead of the 7210. Never got much info on it, but i can swap with a 7210 and the player still works. If the 4803 is also 40 pens, checkout pen 11 with a scope or multimeter. You should see it change state when playing starts. The MAB is a controller. Regards, __________________ GuidoB

15th September 2004, 04:11 AM	#6
herringboy diyAudio Member Join Date: Sep 2004 Location: Bunbury Western Australia	Marantz CD65 info? Hi, I just picked up on this tread. I have just bought a CD65 and know nothing about its quality, performance etc. It sounds OK but my modified Denon DCD615 is a lot more detailed. Any suggestions on some basic mods I could make or info on machine is welcome. (I am a complete novice at mods the denon was done proffesionally). cheers Carl

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15th August 2004, 02:23 AM	#3
pengxy diyAudio Member Join Date: Feb 2004 Location: shanghai	It works ok when bypass saa7220 but it has pops and crackles when skipping tracks and when the music starts. In my marantz cd65fb I can't find saa7210. To restore the muting function I don't know where to connect . It might be M4803a (don't have datasheet).

17th August 2004, 02:09 PM	#5
pengxy diyAudio Member Join Date: Feb 2004 Location: shanghai	I don't have saa7210 to swap but m4803a pin 11 is mute . The muting function of my player is ok when pin 23 of saa 7220 connected to pin11 of m4803a. I bypassed digital filter with muting fuction restored. thanks a lot GuidoB & jean-paul pengxy

1st October 2004, 08:52 AM	#7
pengxy diyAudio Member Join Date: Feb 2004 Location: shanghai	hi 1.The decouple caps of tda1541 are good to be replaced by some hi-quality caps . 2. If you don't like ic 's sound put tube after tda1541 .

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