Vizio vp322 hdtv10a

[triplefour]

have only worked on one plasma tv so far, and the fix was so quick and easy, i dont think i really learned anything about them yet.

but i know bad caps when i see em.

i got 2 of these exact same TV's and they seem to have exactly the same problem with bulging capacitors on the PSU board.

both tvs exhibit the same symptom of absolutely nothing happening when you push the power button.

there is no 5vstandby at the connectors. there is no voltage whatsoever.

obviously i need to replace these capacitors...but what else should i check?
is it possible that if i install new capacitors, they will get blown too if i dont find out what caused it? or is it just time and use that caused it and i should just replace the caps and be done with it?
of course i will be purchasing the caps from here this time!

[Shinju]

Re: Vizio vp322 hdtv10a

Would love to find one of these.

I helped a friend fix one that had 2 blown caps and it turned right on after that and is still going.

32" plasma panels are pretty hard to find.

[triplefour]

Re: Vizio vp322 hdtv10a

i know...i had a feeling there was something special about them. these were my main thoughts though and why i picked them up:
1. they are 2 of the same tv! (usually u can mix and match parts and get one going...not in this case tho)

2. they are 32" plasma tv's which means they are big enough to be nice, but not big enough to break my back lifting them. any bigger than 32 and they are pretty darn heavy.

3. the glass screen is harder to scratch...so many of the LCD tv's i get from the recycler thinking the screen is nice, only to find out at home upon closer inspection that there are some scratches.

only complaint so far:
incredible screw overkill. i had to remove like 100 screws to get the back off. had to remove the speakers to get the back off! craziness!

well i guess i better figure out what capacitors these are so i can order em

[triplefour]

Re: Vizio vp322 hdtv10a

ok finally got around to looking closely and writing everything down that ill need.

samwha WB series 105c
25v 1000uf WB 20mm x 10mm (x2)
10v 1000uf 15mmx10mm (x1)
100v 47uf 15mmx10mm (x1)
10v 3300uf 25mmx12mm (x2)
10v 470uf 12mmx7mm (x2)
16v 100uf 10mmx5mm (x1)

so need to find suitable replacements for these...
i kinda want to go ahead and order all the caps for the other tv as well since theyre the same but i guess ill wait to see if this fixes it first.

the 100v 47uf and the 16v100uf dont seem to have any bulging at all but because theyre close to the ones that are, my guts tell me to replace them as well.

i shouldnt have to replace ALL the caps on the board, though should i?

theres a bunch of random caps scattered around the board but only in that area are they bulging... except for one of the 10v470uf caps thats a ways away from any of the others.
that one is right next to a fairly large capacitor that seems fine, so im going to try get away with not replacing it...

what is a good price/performance brand and series of cap that will be better than the samwha WB but have the same specs?

still cant get over the name of these caps... sam WHA??? lol samsung u crazy

tell me if im doing it wrong!

[triplefour]

Re: Vizio vp322 hdtv10a

rghh i cant seem to find the datasheet for the samwha WB just a lot of goose chasing

[triplefour]

Re: Vizio vp322 hdtv10a

persistence pays. found the datasheet...
heres the list of caps, with impedances (ESR?)

samwha WB series 105c
25v 1000uf 20mm x 10mm (x2) 0.025 datasheet says 12.5mm diameter but i measured it twice and its 10
10v 1000uf 16mmx10mm (x1) 0.038
100v 47uf 16mmx10mm (x1) 0.20
10v 3300uf 25mmx12mm (x2) 0.018
10v 470uf 11.5mmx8mm (x2) 0.072
16v 100uf 11mmx6.3mm (x1) 0.15

[triplefour]

Re: Vizio vp322 hdtv10a

having trouble finding one brand that has all the right dimensions for these ratings...

[tom66]

Re: Vizio vp322 hdtv10a

ESR, just make sure it is within 25% to 100% of the original rating.

I usually don't worry about matching them. I just use Panasonic FR, FM or FC in that order of preference, or sometimes Rubycon YXF.

[triplefour]

Re: Vizio vp322 hdtv10a

ok this is the best i could figure out so far...

samwha WB series 105c
1) 25v 1000uf WB 20mm x 10mm (x2) 0.025 datasheet says 12.5mm diameter though.
2) 10v 1000uf 16mmx10mm (x1) 0.038
3) 100v 47uf 16mmx10mm (x1) 0.20
4) 10v 3300uf 25mmx12mm (x2) 0.018
5) 10v 470uf 11.5mmx8mm (x2) 0.072
6) 16v 100uf 11mmx6.3mm (x1) 0.15

d h
1) 1000uF 25v Rubycon ZLJ 10mm 20mm
2) 1000uF 10v Nichicon HZ 10mm 12mm
3) no 100v caps on badcaps (not that i could find anyway)
4) 3300uF 10v Rubycon PX 10mm 20mm
5) 470uF 10v Rubycon ZL 8mm 12mm
6) no 16v 100uf cap on badcaps...closest:
100uF 25v Rubycon ZLG 6mm 11mm

sure would be nice if badcaps would list the impedance in one of the fields, looking in the datasheet over and over is a real pain! wouldnt be that hard...and it would only have to be done once!

im kind of assuming these are all low impedance caps though and should work out for what im doing. am i right? or do i really have to go check datasheets for another hour?

[triplefour]

Re: Vizio vp322 hdtv10a

do they sell the panasonic caps here? i didnt see them

[tom66]

Re: Vizio vp322 hdtv10a

I wouldn't use ZL/HZ on a power supply. ESR is too low, they may cause issues.

[triplefour]

Re: Vizio vp322 hdtv10a

i would like to do whatever it is you do, since u seem to know what u are doing

[triplefour]

Re: Vizio vp322 hdtv10a

hmm reading the datasheet for the HZ it lists impedance for the 1000uf 10v cap at 12, 10, and 9 depending on the size.... that is way higher than the .038 of the samwha cap...
does higher impedance mean lower ESR?
and why is "too low" ESR bad? i thought lower ESR was better?

[tom66]

Re: Vizio vp322 hdtv10a

That will be impedance at heights of 12mm, 10mm and 9mm, I expect, rather than the actual ESR.

[triplefour]

Re: Vizio vp322 hdtv10a

can u please tell me where to buy the panasonic caps that u recommend?

[triplefour]

Re: Vizio vp322 hdtv10a

but none of the datasheets show ESR, they all only list impedance, and i thought someone had told me earlier that they were basically the same thing? i thought i even verified that by using my ESR meter on some new caps i'd purchased and they matched the impedance in the datasheet...

but i may be stretching my memory on that last claim

[tom66]

Re: Vizio vp322 hdtv10a

Impedance and ESR are essentially the same in this case.

[triplefour]

Re: Vizio vp322 hdtv10a

ok then im confused because you said the HZ have way too low of an ESR but according to the datasheet they have a really high impedance ...which is the same as high ESR...right?

[tom66]

Re: Vizio vp322 hdtv10a

I guarantee you Nichicon HZ will be low ESR/impedance, you must be misreading it. They are used on computer motherboards where ultra low ESR is important.

[triplefour]

Re: Vizio vp322 hdtv10a

maybe i am reading it wrong. what does mΩ mean? miliohms?