caps?

[momaka]

Re: caps?

Would I get away with just replacing the big CapXon do you think?

Like marius said, no.

However, you can put it flat on the side (and maybe glue it or tape it to the pcb) and use a couple of insulated wires to extended those tiny leads to the holes on your board.

Yes. Sorry for not being more thorough with that.
That said, if you do glue the cap, do NOT use silicon (like the one you apply in bathrooms, kitchens, etc.) - it gives off Acetic Acid (IIRC), which can damage traces on the board over time.

If you use 22 AWG solid core wire, you may even get away with using no glue at all.

It seems quite complicated at the moment being a cap replacement virgin

Don't sweat it. My first recap was a monitor as well, and it went without a problem at all. I didn't know as much as I know now either. In fact, the first time I plugged it in, I was wearing safety glasses and even had a fire extinguisher close by - yes, I was that much of a newb when I started .

I can identify one of the capacitors as Samxon (not sure which series...) 1000 uF 25V. Here are some possible matches:
http://cpc.farnell.com/panasonic/eeu...0uf/dp/CA07463
http://cpc.farnell.com/panasonic/eeu...20This%20Range
http://cpc.farnell.com/panasonic/eeu...25v/dp/CA07427

The bulged green one looks like CapXon. Possibly GL series.

Regardless...
You can look for the rest of the capacitors in a similar way as the ones I found. Just click on "Aluminium Electrolytic - Leaded" right above the capacitor title on that page, then from the list, select Panasonic FC, FM, FR, and FK (Rubycon ZL and ZLH will also do) and from there the voltage and capacitance you need for each cap. Also note the diameter and height of each of your caps. Panasonic FC tend to be a little taller than FR and FM for the same specifications, so make sure you don't run into a situation where you get caps that are too high and won't fit in the power supply (or rather, the monitor's cover won't go on).

[budm]

Re: caps?

PANASONIC caps spec.

[spottydog10]

Re: caps?

Thanks everyone this is really helpful.
So...I need to look at the suspect caps and make a note of the voltage, uf/nf
type and height and diameter and that will identify the replacements?
Mike

[momaka]

Re: caps?

^ For monitors, that's usually good enough if you are sticking with Panasonic FC, FR, FM, FK, and Rubycon ZL and ZLH.

But with motherboards and PC PSUs, you also have to look at the brand printed on the capacitor and its series (usually 2 or 3 letters), then hunt their datasheets on Google and elsewhere to fetch the ESR and ripple current, then find suitable replacements from the reputable Japanese manufacturers (Panasonic, Rubycon, Nichicon, Chemicon, and Sanyo). You'll want ripple current rating matched or higher than the original caps and ESR matched or lower than the originals.

Sorry if I might have muddied your head with the above. I just wanted to point that out in case someone new popped on this thread and read it because matching the voltage and capacitance (uF) is usually not enough - at least not for motherboards and PC power supplies. ESR and ripple are critical too. It's just that with monitors, you can "get away" with just using Panasonic FC, FM, FR, and FK without much consideration most of the time.

[spottydog10]

Re: caps?

Thanks for the info.
I'll desolder on Monday.
It may give me an easier way of identifying the replacements and get the new caps ordered if I get them off the board..
I'll let you know how it goes.

Cheers,
Mike

[spottydog10]

Re: caps?

@budm
"You should replace the caps as a set (I marked them beside the red ones)"
Sorry mate, what does that mean?

[mariushm]

Re: caps?

He means you shouldn't replace just a few of those, you should replace all those in that area even though some don't look bad.
The red ones are clearly faulty, the yellow ones don't look like they're bad, but you should replace them anyway.

replace the caps as a set = replace all at same time.

[spottydog10]

Re: caps?

Aah, I thought so, just checking...

Thanks,
Mike

[spottydog10]

Re: caps?

I ordered the new caps today (see attached).
I noticed that the lifetime @105 was 2000 hours.
Is that quite short or is it only theoretical at that temperature?

I've desoldered the caps for replacement.
If I make a mess of the job i.e. sloppy soldering can I actually make the monitor dangerous or blow up or something?

Thanks,
Mike

[mariushm]

Re: caps?

After all the advice we gave you, why the hell did you order Multicomp?

Those are pretty much general purpose capacitors, not suitable for switching power supplies and monitors. We told you to go with Panasonic FM, FR, FC for a reason.

These aren't good enough.

Thanks for wasting my time.

Multicomp is Farnell's "brand", they pick capacitors from various companies and sell them, and they're usually general purpose, not low esr/low impedance/high ripple as required here.

2000h is normally fine, that's the biggest number of hours the capacitors will still stay within a certain percent to the values in the datasheet. With every 10c lower, lifetime doubles.. 4000h@95c, 8000h@85c etc .. of course, with those off brand capacitors, you can't trust the lifetime rating.

[spottydog10]

Re: caps?

Dear marishium,
Kindly don't act like an arse.
Thanks,
Mike