Newbie mistake...Reversed a Cap in a WG K7000 and made a lot of smoke...

[Tenn_pin]

I put a cap kit in my Tekken 3 with a WG 25K7000 and put C57 in backwards.  Smoke from hell and a very hot cap with a bulge from the top.  Can this cap be saved?  Would there be other components damaged by my stupidity? I have too many projects going on at this time.

Trying to burn down the house in Nashville...
R

[SirPeale]

Nope, your cap is toast.  And you NEED that cap.  It's a 47uf, 160V cap.

[qrz]

another "smoke powered device"  let the smoke out and it doesn't work.

i've been doing this a lot of years and once in awhile reverse a cap .

Mitsubishi was notorious for reverse labling caps on their tv pcb's .  blk band was + !! 

just to be different i 'spose ?

qrz

[Tenn_pin]

I just cannot believe that I did that.  Picked up a cap at Randolph & Rice here in Nashville and put it in.  Will install the monitor tomorrow and hopefully not burn down the house.

R

[Level42]

Clean the PCB area and parts around where it happened. The acid in an electrlytic cab is terrible, will eat anything.

During my electronics education we had to make a project, build a fully regulated power supply, incl. self-bent aluminium casing (!). We had all painted both outside and inside (as there was plenty of paint in the can anyway).

There was one really big cap (not mounted on the PCB but on a separate stand), like the size of a "Big Blue".
One of the guys powered up his and after some sizzling and a lot of smoke we all concluded that he was the one to have reversed + and -. When we opened the case, we were still pretty surprised by what we saw:

A perfect circle of absolutely clean aluminum around the stand of the cap. No more primer, no more black coating, all gone.

[Kevin Mullins]

A perfect circle of absolutely clean aluminum around the stand of the cap. No more primer, no more black coating, all gone.

The heat that developes when that happens is pretty intense as well.

[Tenn_pin]

The cap did not explode, but I did clean the area anyway.  Replaced with new cap and we are fighting again.     I am glad I did not fry anything else. It still amazes me how much good a cap kit can do for a monitor.

R