recap zumax 400w

[shovenose]

model: zu400w
it works fine, no blown caps, but i want to recap it anyway.
the 2 big caps are marked MK but im not feeling the need to replace them.
but the other caps. 1 word describes them:...
fuhjyyu...
values:
1000uf 16v (2)
2200uf 10v (1)
470uf 10v (2)
470uf 25v (1)

please recommend replacement caps. if theyre available here at badcaps.net great if not then ill be going on ebay ()

[everell]

Re: recap zumax 400w

Fixin power supplies becomes habit forming!!! Pretty soon you will have a room full of 'em

You can get your replacement caps here at badcaps.net, Digikey, or Mouser. I buy in quantities of ten (to take advantage of price break) from Digikey, using Nichicon PW series or Panasonic FM series (FC series for lower values). I also buy from Badcaps.

If you have any specific questions, pcbonez is our resident expert

[shovenose]

Re: recap zumax 400w

ok well i already ordered some from badcaps. i realize it was stupid to even make a thread i figured it out. i got rubycons and samxon.
and yes i will have roomfuls. especially because my order for 9 cheapo psus from newegg is in the mail. $127 of cheap psus. i am going to test them, take em apart and take pics, post here in psu build quality pictorial, and recap them if they use cheap caps

[shovenose]

Re: recap zumax 400w

oh and are badcaps.net prices good compared to other places? i didnt crosscheck prices i assumed they were good. just curious

[370forlife]

Re: recap zumax 400w

badcaps has pretty good prices. I believe he is also the only US seller that has rubycon and samxon.

[GbreadMan]

Re: recap zumax 400w

Hi all, I recently purchased a Zumax 400w ATX v2.0 off ebay.

Apparently I got what I paid for. I plugged it into an old HP pavilion with a Goldfish3-GL8E motherboard. The CPU fan spun for a tenth of a second, and about 5 seconds later a loud explosion came from the Zumax (not just a soft "pop" but a real "POW!"). No smoke at all. I immediately pulled the plug.

I considered sending it back to the seller but decided instead to open it up and examine/fix it. Surprisingly the fuse is intact. There are no burn marks, no swollen caps. The varistors look intact, as well.

I discharged the caps and the ESR meter tests all at near-zero ohms, but the soldering on the pcb is very messy, a big blob of solder was dumped on the black ground outputs. Most of the caps are ChengX, but the big ones are a pair of Jay'Long 470uF 200v. I haven't been able to find many definitive testimonies for these two brands on badcaps.net

I am suspecting one of the caps is on backwards and/or possibly shorted. I will try to post pics ASAP (my digital camera screen is broken, the seller on ebay sent the wrong screen twice over the past 5 weeks, so it's still in the shop as well. Lately I'm batting a thousand on "fleabay").

Thanks,
Dan

[retiredcaps]

Re: recap zumax 400w

Hi all, I recently purchased a Zumax 400w ATX v2.0 off ebay.

For all power supplies that I get where I don't know the history, I always take it apart to look for obvious signs of damage.

Then I always test the supply standalone and have my multimeter hooked up to measure 5V SB first.

If 5V SB is a steady 5V DC, then I jumper green and black to measure the rest of the voltages. If everything looks okay, then I test the power supply with an old 2001 motherboard with minimal DRAM (128MB or 256MB), old CD-ROM, and old 8GB hard drive to give some load.

edit: With the above methodology, I had 2 go "poof" when checking for 5V SB even though nothing looked wrong and I avoided powering up one because the 47uF 50V had completely blown off the pcb and unwrapped itself.