DVD player power supplies

Hi Manek,

its an interesting point you have brought up.

I have not really heard of a product of that sort. it could be as the output tappings in the transformer are quite different (Since everything from the Remote to the main drives need regulated power). perhaps hence the standardization" could be very different.

But most people modding it usually just add a higher rating transformer, better and higher quality Caps. and if possible create a separate enclosure for the PSU ant keep it outside the main unit.

Arj, I'm interested to know if the switching powers in DVD players...can they be replaced with higher powered ones used in for eg. computers, provided the output voltages are the same ?

Amp Nut...can you also pitch in ?

Manek.

I think SMPS used in computes is not really that great.. also the DC power required in coputers is not very high. your audio equipment would anyway have a netter PSU.

but if the output voltage is the same and your dvdp uses only one tapping into the rectifier, i suppose it could be done.

guess someone like Purnendu and of course amp nut might be able to give a more practical look on this one.

Hi Maneck,

Frankly, no idea.... and had infact never thought along these lines.

I am shooting from the hip, but would be interesting to try a computer PSU on a CD / DVD player... the voltages should be similar, in principle.

However, I know that the earlier Computer PSUs all required a fairly heafty load on the 5 V DC output. In computers, that is not an issue, since the CPU is Always connected...

Dont know the necisities of recent computer PSU.


Power Amps typically require Non standard voltages, and certaily WAY higher than the 12VDC in Comp PSUs. So drop in replacements would be almost immosible to find.

You will also need to add Local decoupling and or a local regulator, with an external PSU, for best results..

hi amp nut....not talking power amps just DVD/cdp's that use switching power supplies.

Todays computers also use a 5 VDC output. The SMPS's which servers use are tough and they run day in day out non stop with a heavy load of multiple HDD's(6nos), CPU's(2nos), other cards(another two), etc etc , that was what I was aiming at....wonder if we can find out some more on this

Manek.

I agree with your line of thought.

As I said in my previous post:

would be interesting to try a computer PSU on a CD / DVD player... the voltages should be similar, in principle.

Would be interesting to either hear from someone who has been there, done that ... or ...seen a link on this on the net.

Manek schrieb:

hi amp nut....not talking power amps just DVD/cdp's that use switching power supplies. Todays computers also use a 5 VDC output. The SMPS's which servers use are tough and they run day in day out non stop with a heavy load of multiple HDD's(6nos), CPU's(2nos), other cards(another two), etc etc , that was what I was aiming at....wonder if we can find out some more on this Manek.

Hi guys... my first post here :). I'm mostly a computer guy who developed a taste in audio a while back... I'm a total newb in the high end audio field but have quite a bit of background in computers.

As far as modern computer psus are concerned, the good ones like antec/seasonic or PC Power and Cooling are incredibly well built. Many of them can supply 500W or more of continuous power day in and day out... Also they have three separate voltage rails 3.3V, 5V and 12V. Modern computers generally draw 95% or more of their power off the 12V rail so that tends to be the most beefy. These PSUs are expensive(some are more than 200$ each with the really high end ones being 500$ or more) but very stable and have very very low ripples in their output. Something to the tune of 10mV on the 12V output. If CD/DVD players use similar voltages (not sure?), then one can easily mod a good quality computer PSU to power one of these devices improving the output quality significantly.

reignofchaos...

Thats what I thought as well. There are many SMPS's to choose from actually.
Many questions looming in my head....Wonder if the digital amps and dvdp's have similar architecture in Power Supply units...wonder if their working/behavior is similar...wonder if the output voltages are similar...can we swap in stock form ?

How do we take this forward ?

Manek.

manek, are these discussion useful ?

http://www.diyaudio.com/forums/showthread/t-70566.html

http://www.diyaudio.com/forums/showthread/t-81663.html

maybe you will get your answers there ?

^^Thanks... very informative threads there. I'm more or less certain those cheap korean/chinese DVD/CD players will benefit a lot from a PSU upgrade.

one thing to grab is that the switching frequency should
be above 500khz.....

tks arj...

manek.

^^Could you explain a bit more as to why that must be a requirement? Most computer PSUs have a frequency of around 50-55kHz. Any higher causes major EMI effects and the voltage will bounce around horribly when loads are high.