Where to buy?

[five40josh]

Hello all,

New to the forum (and new to caps all together!). I need to replace a blown Capxon (1000 uF 16v) on my Viewsonic monitor. While I'm replacing one, I figure I'll replace all the Capxon caps with better ones. I'd like to buy all the caps at once from a reputable place- any suggestions on where to purchase them?

I checked the badcaps.net website, but I don't see some of the caps I'm trying to replace in any of the brands available:

-680 uF 16v
-470 uF 50v
-220 uF 50v

Thanks in advance!

JR

[PCBONEZ]

Re: Where to buy?

Welcome.

Replacing all the Capxon is a good plan. [Especially if you don't like do-overs.]

Step 1 is to ID the old caps and look up their specs.
Capxon makes a lot of series',,,, aka 'models' in other trades.
The different models have different grades.

To ID them look at the markings on the caps and figure out which is the series.
Capxon usually uses 2-digit series codes like KF or KM or something similar.
[Note, there will be an "M" somewhere in the mix. It just means the uF is +/-20% Tolerance. Normally it's off on it's own somewhere but sometimes they run the series name and tolerance markings into each other. ]

Also need to know the diameter and [sometimes] the length in mm.
In some series a given uF/volts combination will have 4 [or even more] physical sizes and the cap's specs change with the physical size.

Standard diameters are 4, 5, 6.3, 8, 10, and 12.5mm
[Sometimes you see 6mm or or 12mm or 13mm but that's not enough difference from standard to matter.]
The length is harder to measure and can be 'ball-park' within a few mm because once you have the uF, volts, and diameter there usually be less than 3 to choose from and they aren't that close to the same length. [Like maybe 8x12mm & 8x16mm & 8x20mm in the data sheet. - Not so close you need an exact measurement to tell which.]

Once you post that info I will point you to the data sheets and explain what to look at.

.

[PCBONEZ]

Re: Where to buy?

Oh,, and please enter your basic location in your profile.
... At least what country.
It helps when people suggest where to buy things..
.

[Mad_Professor]

Re: Where to buy?

If you live in the states you can buy capacitors from Digikey or Mouser Electronics. If you buy from digikey don't know what shipping option to choose, do first class mail, it's the cheapest and fastest.

Outside of the states:
vendor list
https://www.badcaps.net/forum/showthread.php?t=613

Refer to this thread for good brands and types.
https://www.badcaps.net/forum/showpo...44&postcount=4

If this is your first time soldering or doing any kind of work like this, you should give this thread a good read through.
First time? give this a try!
https://www.badcaps.net/forum/showthread.php?t=485

Damn it PCBonez beat me to it.

From my understanding you will have to look up datasheets for your capxon caps. You need to look for max ripple rating and ESR/impedance then match it or exceed it the specifications with the replacements. High Ripple, Low ESR *impedance* Be sure to look for the correct uF, Voltage and sizes as some ripples and ESR may be different for different sizes. Be sure your leads will match your holes, and your diameter and height match. If you have some wiggle room it's ok to relax but if you don't, it's critical.

If you can't find a particulate cap, try going up in voltage, if you still can't find it then don't be afraid to ask on these forums.

Also you don't need to replace the big main filter cap, the one that says 400v or something, They rarely fail.

Refer to this thread for types and proper naming of parts on a capacitor.
https://www.badcaps.net/forum/showthread.php?t=589

there was a thread or FAQ around here about understanding capacitors, can't seem to find it.


Anyways...

What kind of viewsonic monitor do you have?

You should replace all the caps if you can, not just the one's that are physically bad. The small lytics *not polymer* ones that are 4.7uF, 10uF or 22uF and the big lytics ones like 3000uF and below.

I recommend Panasonic FM, FR and FC, second favorite Nichicon HE and HZ.

I tend to use a pencil iron with a chisel tip and desoldering braid for removal.
I start off by adding a little solder to liquefy the solder joint of my bad cap leads. Then while I have my iron on and the solder joint in a liquid state, I quickly switch the solder wire in my hand out with the braid and then apply it to the joint. I slowly brush the braid against the joint and all solder will be suck up on to the braid making for a clean and easy removal. Don't exceed 10 seconds in contact time or you will burn a trace or remove the copper track. Keep the braid moving otherwise the braid becomes a heatsink and you lose heat on the joint causing it to solidify and the braid gets stuck, forcing you to start over.

Soldering the new one on you should refer to the First time thread link above.

[PCBONEZ]

Re: Where to buy?

A lot of Viewsonics have "Elite" brand capacitors too [or instead].
Any Elite's should go too.
.