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Old 1st December 2004, 01:21 PM   #1
borges is offline borges  Norway
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Default Modifying the Mission DAD5

Hi,

I have an old Mission DAD5 that uses Philips Bitstream conversion. Now I'd like to put my own DA board into it.

How do I modify this player to get to the internal digital signals? Preferably, I'd get in before the S/PDIF generation.

Hope this player has a decent crystal oscillator and power supplies that I can hack into.

Any schematics out there?

Greetings,

BÝrge
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Old 28th November 2006, 10:06 PM   #2
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hi i have one here if i was you i would change all the diodes for 11dq 10 then add a 5 volt super reg and change the opamps you will be very suprised how much better the cd player will sound
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Old 28th November 2006, 10:34 PM   #3
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Default Re: Modifying the Mission DAD5

Quote:
Originally posted by borges
Hi,

I have an old Mission DAD5 that uses Philips Bitstream conversion. Now I'd like to put my own DA board into it.

How do I modify this player to get to the internal digital signals? Preferably, I'd get in before the S/PDIF generation.

Hope this player has a decent crystal oscillator and power supplies that I can hack into.

Any schematics out there?

Greetings,

BÝrge

A little more info on the chipset.
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Old 1st December 2006, 11:11 PM   #4
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a little bit of soap will wash away the lips stick from my face
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Old 1st December 2006, 11:58 PM   #5
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Quote:
Originally posted by whats gan on
a little bit of soap will wash away the lips stick from my face
Your cross dressing issues are no concern of ours.
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Old 2nd December 2006, 07:08 AM   #6
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it is a song never heard of it george lolhttp://www.showaddywaddy.net/
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Old 2nd December 2006, 07:37 AM   #7
Gasho is offline Gasho  Croatia
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I think that Beatstream conversion is not a problem in sound of your player.

Poor Clock section, simple and noisy power supply , generic analog section are the problems.

What DAC chipset uses DAD5?
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Old 2nd December 2006, 08:30 AM   #8
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saa7321 dac saa7310 decoder
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Old 2nd December 2006, 08:57 AM   #9
Fin is offline Fin
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Quote:
Originally posted by whats gan on
saa7321 dac saa7310 decoder
Same chips as Philips CD618/624/634/840/850 and similar to Rotel RCD865/965. QED Digit also used that DAC chip.

It is the first generation bitstream with the filter, dac, and analogue stage in one chip. The chip can be used just as a filter and the final internal opamps can be bypassed....but not the ones used for I/V. It has five 5V power pins.

The decoder is fairly common - found in many CDPs of that time. It is easy to access the I2S between the two chips.....but it would be nice to see someone having a real go at making something with 7321 sound better instead of just bypassing it completely.

Jean-Paul likes this chip and thinks it compares well to some of his TDA1541 machines. KWY hates it mainly because you cannot bypass all of the onboard opamps.
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Old 4th December 2006, 06:50 PM   #10
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Default change power supply to the opamps

THE MISSION DAD5
with the opamps replaced with AD826an schottky diodes 11dq10
and pure silver wire bypass the two nikon bp caps creates a lot more life to my player it is so damn musical now with lots more detail. has any one powered the opamps on there own i would love to do that there is a -15 vot reg and a 5v + which i think powers the opamps
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