OCZ 700 Watt Bug Zapper Recap & Repair

[kc8adu]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

i have a lelon 4700@50 i replaced in a rockford fosgate boom car amp.
if it hasnt hit the dumpster yet i will dissect it.sounds like a marble rolling around inside.its mate on the - supply is normal.replaced anyway of course.

i have *never* had or heard of a capacitor that has anything moving in it.

[Behemot]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

I have seen (or rather heard) this quite often with lead-acid batteries. Guess that snap-in caps with big cans can to it too, there is often some room inside between the roll and the top part of the can. If you remember that opened cap from the welder I posted here and it measured fine, the roll inside was moving if you shaked it enough

[Per Hansson]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Please dissect the capacitor and post some pics of it's innards.
I guess a capacitor that has dried up completely inside could rattle around a bit.
Still it should be a minimal difference vs a cap filled with electrolyte...
Never seen or heard of something like this before so I'm curious

[SgtRock]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Dear Kaboom"
--The British used to say that if you locked a bunch of Hong Kong merchants in a cave for twenty years, when you opened it they would have all gotten wealthy by selling rocks to each other.
"Does not squirell crack nuts on bough of tree."
La Fu (ancestor of Wun H. Lo and his brother Tu H. Lo) 1610 -1780

[stj]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

lol
that's better than the original, it's got rubycon in it.

[kaboom]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

i have *never* had or heard of a capacitor that has anything moving in it.

Are you sure?

http://320volt.com/en/cakma-kondansator/

[stj]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

i have *never* had or heard of a capacitor that has anything moving in it.

[SgtRock]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Good work Manthi. Get er done.
Cheers!

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

ok some update,
i replace the defective 330uf 400v capacitor (funny when i shake it i can hear moving part inside) by the one i bought (390uf 400v from panasonic) but still no power.
so after some more reading (link given by sgtrock+ one of his post on eevblog) i found out that a TNY278P (IC501) switching regulator could have gone bad, and indeed after close inspection, i realise it has a blown leg,
so i got to change this also.
i also checked the q601\602 mosfet but they are ok

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

ok thanks, went for https://www.digikey.ca/product-detai...1663-ND/483261

[Behemot]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Oh I see, noticed just the 1.75A version.

You can go with 390 just fine, you'll get less stress on PFC silicon and longer hold-up time. But the cheapest seems to be https://www.digikey.ca/product-detai...965-ND/3986864, for 390 https://www.digikey.ca/product-detai...1663-ND/483261

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

What series is that teapo crap? I can find no 330/400 with 1.9 A RC.

LH
also can someone explain me why it's ok to go with a 390 uf instead of 330, i always read that you should stick with same capacitance when replacing a capacitor

[Behemot]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

add $8 shipping and you start crying,
but everything is relative
this morning i went to a local electronic store to see if they had anything that would fit, but i came back empty handed,
but got a $168 ticket +3 points for failing to do a complete stop.
so in the end that $15 with digikey is a bargain versus driving to my local store

ok back to topic, original cap has 1.9 ripple and the one i listed has 1.44 does it matter?

I can get it much cheaper. But its always the same…you dont need it so foten after all, you need it fast, you whatever. So I invest at least 500 bucks in that, than sell 10 pcs here and keep the rest on stock for 5+ years till I sell it out finally…nah, not really. You want, than buy it overpriced.

What series is that teapo crap? I can find no 330/400 with 1.9 A RC.

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

ok thanks, going to check that

[stj]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

yes, it's critical in that application.
you need equal or higher ripple.

go look at something like panasonic ED or EE series.

and if you have the height, consider 390uf

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Price is awfull though.

add $8 shipping and you start crying,
but everything is relative
this morning i went to a local electronic store to see if they had anything that would fit, but i came back empty handed,
but got a $168 ticket +3 points for failing to do a complete stop.
so in the end that $15 with digikey is a bargain versus driving to my local store

ok back to topic, original cap has 1.9 ripple and the one i listed has 1.44 does it matter?

[Behemot]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Seems OK, if it fits the diameter. Price is awfull though.

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

ok i think i found the culprit

teapo 330uf 400v

can i replace it with
https://www.digikey.ca/product-detai...805-ND/1004466

[manthi]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

thanks a lot for the help,
i am going to do some reading like you suggested and i will be back with pictures when i am ready,
thank you again

[SgtRock]

Re: OCZ 700 Watt Bug Zapper Recap & Repair

Dear Manthi:
- I already posted a reply, but it seems to have disappeared. Here we go again. We need clear pictures of the board back and front. Also we need to know what meter, soldering, and desoldering equipment you have. Please search for and read any OCZ PS threads on this blog, and if needed any of the general trouble shooting threads as may be appropriate. You will want to trace the power from the cord on through the large filter cap and report back. Dominic Chen has developed a partial schematic which is just what the doctor ordered, and can be found at https://www.dcddcc.com/proj/oczpsu/.
Cheers