Pioneer DV-79avi service manual - diyAudio
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Old 22nd September 2009, 05:38 PM   #1
ctong is offline ctong  United States
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Default 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.
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Old 26th September 2009, 08:58 PM   #2
ctong is offline ctong  United States
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Does anyone know whether the clock is next to the DACs or is far away?
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Old 21st November 2009, 09:35 PM   #3
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Originally Posted by ctong View Post
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.
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Old 22nd November 2009, 12:52 AM   #4
ctong is offline ctong  United States
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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?
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Old 22nd November 2009, 04:31 AM   #5
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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.
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Old 23rd November 2009, 04:05 PM   #6
ctong is offline ctong  United States
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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.
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Old 23rd November 2009, 05:20 PM   #7
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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.
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Old 23rd November 2009, 11:55 PM   #8
ctong is offline ctong  United States
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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.
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Old 24th November 2009, 12:44 AM   #9
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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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Old 24th November 2009, 12:56 AM   #10
ctong is offline ctong  United States
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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.
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