Pioneer DV-79avi service manual

ctong · 22nd September 2009, 05:38 PM

I am considering modding a DV-79avi universal player. I would greatly appreciate it if anyone can share the service manual.

ctong · 26th September 2009, 08:58 PM

Does anyone know whether the clock is next to the DACs or is far away?

windowman99 · 21st November 2009, 09:35 PM

Quote:

Originally Posted by ctong

Does anyone know whether the clock is next to the DACs or is far away?

I have one I'm going to work on for a friend. The priority is to optimize 2-channel SACD sound.
Don't know about any details yet, I just took off the cover yesterday.
Let me know if you've made any progress so far.

ctong · 22nd November 2009, 12:52 AM

Quote:

Originally Posted by windowman99

I have one I'm going to work on for a friend. The priority is to optimize 2-channel SACD sound.
Don't know about any details yet, I just took off the cover yesterday.
Let me know if you've made any progress so far.

I have not started yet, because I do not know whether it is worth modding. I would like to know where the clock is. Do you have the service manual?

windowman99 · 22nd November 2009, 04:31 AM

Quote:

Originally Posted by ctong

I have not started yet, because I do not know whether it is worth modding. I would like to know where the clock is. Do you have the service manual?

Nope. Can't tell where the clock is yet. Anything with opamps after the DAC is worth modding IMHO. Not to mention cleaning up the digital 5v and/or 3.3v supplies.

ctong · 23rd November 2009, 04:05 PM

Quote:

Originally Posted by windowman99

Nope. Can't tell where the clock is yet. Anything with opamps after the DAC is worth modding IMHO. Not to mention cleaning up the digital 5v and/or 3.3v supplies.

Sure, but to a point. I would like to have some idea on whether the clock would become the performance limiter in this player.

windowman99 · 23rd November 2009, 05:20 PM

Quote:

Originally Posted by ctong

Sure, but to a point. I would like to have some idea on whether the clock would become the performance limiter in this player.

Every CD player I've put a better clock in has improved the sound. I'm sure this player would benefit too. I haven't worked on DVD/SACD players, but they shouldn't be that different in their need for a better clock.

ctong · 23rd November 2009, 11:55 PM

Quote:

Originally Posted by windowman99

Every CD player I've put a better clock in has improved the sound. I'm sure this player would benefit too. I haven't worked on DVD/SACD players, but they shouldn't be that different in their need for a better clock.

The jitter performance of the player depends on the location of the clock. If the clock is far away, the jitter cannot really be made very low. The clock becomes the limiting factor. Please post what you find out regarding the clock location.

windowman99 · 24th November 2009, 12:44 AM

Ok, but what's your definition of "far away"?. 2 inches, 1ft, or....???
And then there's the option of mounting the new clock closer, if it's feasible.

ctong · 24th November 2009, 12:56 AM

Quote:

Originally Posted by windowman99

Ok, but what's your definition of "far away"?. 2 inches, 1ft, or....???
And then there's the option of mounting the new clock closer, if it's feasible.

Within a couple of inches of a DAC is good. DVD players sometimes have clocks on a different board. That is too far.

22nd September 2009, 05:38 PM	#1
ctong diyAudio Member Join Date: Jun 2005 Location: Clemson, South Carolina	Pioneer DV-79avi service manual I am considering modding a DV-79avi universal player. I would greatly appreciate it if anyone can share the service manual. __________________ CT

26th September 2009, 08:58 PM	#2
ctong diyAudio Member Join Date: Jun 2005 Location: Clemson, South Carolina	Does anyone know whether the clock is next to the DACs or is far away? __________________ CT

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24th November 2009, 12:44 AM	#9
windowman99 diyAudio Member Join Date: Jan 2008	Ok, but what's your definition of "far away"?. 2 inches, 1ft, or....??? And then there's the option of mounting the new clock closer, if it's feasible.

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