2200uf 10v cap replace with 6.3v?

[berniedd]

Re: 2200uf 10v cap replace with 6.3v?

to make a capacitor bulge you either have to run it on it's voltage lmiit or put high rfequency ripple into a cap not designed for it.

what i posted was something else,
as a design rule a cap's minimum voltage should be 1.5x the input voltage to allow for the ripple.
5v x1.5 = 7.5 NOT 6.3 so using a 6.3v cap on a 5v line is asking for trouble down the road.

I use 6.3 volt quality caps to replace 10 volt-rated ones on 5 volt rails, and I've never had a failure yet even after 4 years of the repair.

[Agent24]

Re: 2200uf 10v cap replace with 6.3v?

Possibly you have more than one bad capacitor - they can fail without visible signs. If one was bad, likely the rest are on the way out. Replace them all, especially any the same brand as the one that was blown. It could be that bad power is affecting the signal processing chips

It could also be a faulty video cable (DVI\HDMI is susceptible to this kind of thing)

Don't rule out a faulty graphics card unless you have tried another monitor too.

Might even be a faulty panel in the monitor.

[jasonbay13]

Re: 2200uf 10v cap replace with 6.3v?

so back to this 19" monitor.
replacing that one bulging cap did make the monitor work, though it has a slight problem;
certain shades of certain colors result in the pixel actually displaying a different shade. Ex: dark blue (near top right of windows 7 default background) some of the pixels flicker from normal to a darker shade. and gets significantly more noticeable when a uac prompt dims the screen.

is it possible it is anything besides the capacitors that are causing this?

[9302z28ss]

Re: 2200uf 10v cap replace with 6.3v?

That's good to hear at least I don't need to replace that. I need two 250v 300uf 105c caps they rent yen barrel style about an inch tall and wide and I also need a 50v 470uf about 1/2 in wide and 3/4 in tall anybody have any? Sorry to hijack

[Agent24]

Re: 2200uf 10v cap replace with 6.3v?

is it normal for a cap to read over what it rated for?
for ex i have a 50v 1000uf cap and its reading 1030-1033uf on my ESR tester i have a few other things also but cant start a new thread for some reason

Yes, capacitors (in fact most, if not all components) are not exactly what they say on the label. Electrolytic capacitors typically have a tolerance of +/-20% which means the value they really are could be as much as 20% higher (or lower) than what they say on the label.

Bear in mind also that your meter will not be perfectly accurate either - although it should be a lot better than 20%!

[9302z28ss]

Re: 2200uf 10v cap replace with 6.3v?

is it normal for a cap to read over what it rated for?
for ex i have a 50v 1000uf cap and its reading 1030-1033uf on my ESR tester i have a few other things also but cant start a new thread for some reason

[kc8adu]

Re: 2200uf 10v cap replace with 6.3v?

might be your rule and having some headroom is great.
but its common practice even on high reliability/industrial stuff to use 6.3v caps on a 5v line.
most caps have a surge rating well above the stamped rating.
good ones can take moderate overvoltage forever due to being designed with some headroom.forget that on cheap and nasty stuff like we often replace!

[stj]

Re: 2200uf 10v cap replace with 6.3v?

to make a capacitor bulge you either have to run it on it's voltage lmiit or put high rfequency ripple into a cap not designed for it.

what i posted was something else,
as a design rule a cap's minimum voltage should be 1.5x the input voltage to allow for the ripple.
5v x1.5 = 7.5 NOT 6.3 so using a 6.3v cap on a 5v line is asking for trouble down the road.

[larrymoencurly]

Re: 2200uf 10v cap replace with 6.3v?

if the voltage is even close to 6.3v the sanyo will explode - literally.
i wouldnt chance it.

Are Sanyos more vulnerable to that than other brands? Because I replaced a bulging 10V, 2200uF Koshin brand cap with a 10V, 2200uF Sanyo, and 2 years later it bulged.

[Agent24]

Re: 2200uf 10v cap replace with 6.3v?

i have another thread in tv's. it has no backlight, it seems to be the inverter board, but no caps are bulged...

That's when the fun starts
But bear in mind not all bad capacitors bulge. That's where the ESR meter is handy.

[Sparkey55]

Re: 2200uf 10v cap replace with 6.3v?

as long as it's clean
i use a brass-wool tip cleaner - none of that wet sponge shit!

I have used the wet sponge for over 40 years with no problems. I consider myself "Sponge Worthy", Sienfeld joke.

[jasonbay13]

Re: 2200uf 10v cap replace with 6.3v?

Got it all soldered and put back together, plugged it in and the screen came right up saying no input signal. thx for everything.

The tip should be clean and a silver colour. If it's not, it's oxidized and you will have problems.

This ^^

What is your iron? Some may not have enough power. Make sure you add fresh solder to the joint first too, to ensure maximum heat transfer through the fresh solder from tip to joint.

I got a weller "medium duty" from lowes.

i have another thread in tv's. it has no backlight, it seems to be the inverter board, but no caps are bulged...: https://www.badcaps.net/forum/showth...496#post461496

[Agent24]

Re: 2200uf 10v cap replace with 6.3v?

thanks for all the input, i'm trying to desolder one of the 2200uf caps now. though it seems my tip isnt as effective as the first time i used it. do they require proper maintenance to keep working well?

The tip should be clean and a silver colour. If it's not, it's oxidized and you will have problems. Check this out: https://www.youtube.com/watch?v=I_NU2ruzyc4

Is the capacitor on a multi-layer PCB? They are much harder to work on. Give photos of the capacitor and PCB if you are unsure.

What is your iron? Some may not have enough power. Make sure you add fresh solder to the joint first too, to ensure maximum heat transfer through the fresh solder from tip to joint.

[Topcat]

Re: 2200uf 10v cap replace with 6.3v?

as long as it's clean
i use a brass-wool tip cleaner - none of that wet sponge shit!

I've used a wet sponge for over 25 years, always been A-OK!!

[stj]

Re: 2200uf 10v cap replace with 6.3v?

as long as it's clean
i use a brass-wool tip cleaner - none of that wet sponge shit!

[jasonbay13]

Re: 2200uf 10v cap replace with 6.3v?

thanks for all the input, i'm trying to desolder one of the 2200uf caps now. though it seems my tip isnt as effective as the first time i used it. do they require proper maintenance to keep working well?

[Topcat]

Re: 2200uf 10v cap replace with 6.3v?

in that monitor its likely on the +5v line.
the 6.3 will be fine.
replace all on the power supply now or one at a time.your choice.

This. I do it all the time. If unsure, measure the voltage on the cap, if its 6.3v or less, a 6.3v replacement cap will be just fine.

[Agent24]

Re: 2200uf 10v cap replace with 6.3v?

if i have the choice, should i care about other factors besides the uf and voltage?

If you are talking about getting proper replacements as opposed to any old cap just for testing, then yes.

Capacitance (in this case, microfarads\uF) should be the same, voltage the same or higher, check the dimensions (as you already found, to make sure it fits) and ensure you get the ESR low enough.

Ideally you should look up the datasheets for the original capacitors and makes sure the replacements match - ESR same or lower.

In practice though you can generally get away with any standard Low ESR series from any decent brand.

[kc8adu]

Re: 2200uf 10v cap replace with 6.3v?

no it wont.
in fact it will work fine.it will see 5v in that position.

if the voltage is even close to 6.3v the sanyo will explode - literally.
i wouldnt chance it.

if you have a broken computer, see what's in the psu - that's gotta have 10v and 16v rated caps in it.

[kc8adu]

Re: 2200uf 10v cap replace with 6.3v?

in that monitor its likely on the +5v line.
the 6.3 will be fine.
replace all on the power supply now or one at a time.your choice.