Denon 2900 clock upgrade?

[simeon_noir]

I have a 2900 being used almost exclusively as a digital transport. Mods so far are a PSU rebuild and a Audiopraise Vanity module. I am now able to listen to all media via my Benchmark DAC1 and am very happy with the results thus far. One characteristic the player has retained through the mods is the fact it takes 2-3 hours to really come on song. I have read here that some do not consider a clock upgrade to be worthwhile on this player, however I am thinking that a more stable clock would help it deliver its best sooner. I know that one of this players frailties is the reliability of the laser pick ups and so would not want to leave it on 24/7.

Opinions/experiences please.

 

[clm811]

I've had the clock replaced on my DVD2900, and even with the stock power supply (albeit with larger caps after the +/-9v linear regulators), it has made a SIGNIFICANT improvement in the performance of this unit as a player, and also noticeable improvement as a transport is heard through my 192/24 DAC.

BTW, would you please describe in detail what your power supply rebuild entailed?

-chas

 

[simeon_noir]

Hi,
good to hear that a clock upgrade will be beneficial. I will be looking at the player again after I complete my present project (a turntable rebuild). The upgrade involved replacing all of the capacitors with Panasonics (I think!) and 5 diodes replaced with much beefier items. I actually got the PSU done professionally despite having the skills myself because I was very busy at the time.

 

[clm811]

Can you please specify which diodes were replaced?
Thanks.

 

[simeon_noir]

It was the four rectifier diodes and another of the same type close by.

 

[clm811]

Simeon wrote:

It was the four rectifier diodes and another of the same type close by.

Please be more specific- were these the diodes before(D901-904) or AFTER the Switching Transformer (D910-914)?

I am attaching a schematic diagram to help specify...

Thanks,
-chas

p.s. see my other DVD-2900 post in "Digital" forum

 

[clm811]

DVD2900 Tweaks

THANK YOU

I just learned from another member that the diodes to change are D901-904 and the cap, C905 may also be upgraded to Black Gate or other high grade, high voltage, Low-ESR type.

There is a another thread about DVD2900 Power supply upgrades




I will detail other mods as they are made...
Happy New Year!

 

[jtsaudio]

I'm interested in trying some mods
Can anyone here help me find the full schematic?
JT

 

[clm811]

Free Stuff!


In celebration of completing my system,
I'm giving away my extra mod parts.
See my post at DVD2900 Tweaks:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=42436&perpage=25&pagenumber=6

Happy New Year!

-chas

 

[clm811]

New thread on DVD2900 mods

Hi all.
On another thread I will soon be reporting on three different DVD2900 Mods and doing listening comparisons between them...Stay tuned

Good Listening & Happy New Year!

-chas