Bad DAC-19M00B PSU, would appreciate some pro-tips

[ankan]

Re: Bad DAC-19M00B PSU, would appreciate some pro-tips

Its curious how the swollen caps C200 Ce101 CE109 have the same size, are in different branchs of circuit and it is not relative to proxmity to heatsinks, maybe the smaller ones due to size dries easier and get higher esr maybe because it's heat is generated outside by diodes and not inside...

If it's to any help, the caps says:

KF 105*c
P638
VENT
----
CapXon
220uf 25v

Maybe it's a low quality cap/bad batch?

[ankan]

Re: Bad DAC-19M00B PSU, would appreciate some pro-tips

I've managed to find a electronics store in another city that sells the AOP605 fets btw so I will order it from there and get the caps and fuse locally.

[ankan]

Re: Bad DAC-19M00B PSU, would appreciate some pro-tips

So it took me a while to go and get the components to try to fix the psu.

But now it's up and running!

And I thought i'd post my solution here if anyone else has the same problem
and ask a few questions as well

What I ended up doing was replacing the 3 domed 25v 220uF capacitors with new ones.
I didn't find the ones I got recommended, so I bought the only ones my local place had.

http://www.ges.cz/cz/rad-220-25-ht-r...S05413790.html

I hope they're a ok replacement?

I couldn't find the same kind of fuse either, and as a "well, if things starts to burn when i plug it in,
at least I've learned not to do this again" moment I used a 3,15A/250V Fuse instead of the 3A
(I can't find any V info for the original in the manual) that the original was. You peeps think it's ok?
Also the fuse is crazy big compared to the original super small one so I had to wire it and put it to the side.
Any danger in using this kind of fuse instead of the kind that was on the board to start with?
http://www.ges.cz/cz/f-3-15-a-mini-pcb-GES07900346.html


Thanks for all the help! Highfives all around! You've been awesome!

[selldoor]

Re: Bad DAC-19M00B PSU, would appreciate some pro-tips

Caps look ok if they are like in the picture and they have that shield logo they may be
united chemicom (UCC) is that what it says?

EDIT - just read the pdf yes they are very low esr nippon chemicon



The fuse -amps is only slightly over and as long as the voltage rating is higher
than the working voltage it should be no problem.
Well done - good fix

[ankan]

Re: Bad DAC-19M00B PSU, would appreciate some pro-tips

Caps look ok if they are like in the picture and they have that shield logo they may be
united chemicom (UCC) is that what it says?

EDIT - just read the pdf yes they are very low esr nippon chemicon



The fuse -amps is only slightly over and as long as the voltage rating is higher
than the working voltage it should be no problem.
Well done - good fix

Hi.

Great, thanks for the info!

Next project is to try to fix my semi-broken Korg microKorg keyboard! woo!