CAPACITOR EXPLODED on RCA VCR VR501

[lemite]

Does anybody knows what is the value of C4 of the power supply module of RCA VCR Model number VR501? This unit was plugged to 220VAC and the big capacitor exploded.

[Pentium4]

Re: CAPACITOR EXPLODED on RCA VCR VR501

Looks like C4 was what went off in there It'd be pretty hard to tell...that cap evaporated.

[eccerr0r]

Re: CAPACITOR EXPLODED on RCA VCR VR501

I'd guess 330 or 470 microfarads 400 volt.. But it's only a guess. It will probably work with a 470 to be safe but I think the 330 probably will work too.

I'm only guessing based on the facts:
this appears to be a switching power supply
this appears to be the mains filter capacitor
only one mains capacitor
220VAC
estimate around 100 W PSU
Does not look like like a heavy duty power supply like a PC
not a tiny supply like a phone charger

But this is merely a guess...

[ben7]

Re: CAPACITOR EXPLODED on RCA VCR VR501

WOW!!!

Woo, exploded capacitor carnage porn!

I would say that it is an 82uF 400v cap, or maybe 100uF 400v.

Check the bridge rectifier for shorts, and also the fuse will need replacing.

Did you find the covering of the capacitor? that may give us a clue to it's ratings.

Looks like ther was something blocking the top vent of it, and it just built up pressure. Must have been very loud!!!

[lemite]

Re: CAPACITOR EXPLODED on RCA VCR VR501

WOW!!!

Woo, exploded capacitor carnage porn!

I would say that it is an 82uF 400v cap, or maybe 100uF 400v.

Check the bridge rectifier for shorts, and also the fuse will need replacing.

Did you find the covering of the capacitor? that may give us a clue to it's ratings.

Looks like there was something blocking the top vent of it, and it just built up pressure. Must have been very loud!!!

I forgot to inform everybody that this unit for 110volts AC was plugged to 220VAC. Yes indeed, it was a very loud explosion! Somebody forgot to use step-up transformer. Unfortunately, the covering was totally unrecognizable.

[mariushm]

Re: CAPACITOR EXPLODED on RCA VCR VR501

The fuse seems to be gone as well.

If it blew up from plugging at 220v, then the capacitor was probably only rated for 180-250v
Based on the size of it, I would guess 200-330uF

[smason]

Re: CAPACITOR EXPLODED on RCA VCR VR501

Blowed up real good!

[larrymoencurly]

Re: CAPACITOR EXPLODED on RCA VCR VR501

In my old Panasonic VCR, designed for 120VAC, it was 120uF, 200V.

[japlytic]

Re: CAPACITOR EXPLODED on RCA VCR VR501

It took a fair amount of energy for this to happen... and a client of mine connected a 120VAC JVC AM/FM tuner to 240VAC - causing the primary of the power transformer to fail, but in this case, it did not damage anything outside the power supply board.

[ben7]

Re: CAPACITOR EXPLODED on RCA VCR VR501

I bet you that the vent was too close to the lid of the PSU, and it couldn't vent. So it exploded

Try a 120uF 200v cap in there, replace fuse, and see what happens

[kc8adu]

Re: CAPACITOR EXPLODED on RCA VCR VR501

being that this is a panasonic built unit the 120@200v is spot on.
so did c4 contain c4?

[c_hegge]

Re: CAPACITOR EXPLODED on RCA VCR VR501

^
Looks like it did