Reccaping by used CAP's recommendation.

[GEOcros]

Hi.
I have Motherboard and i know which CAP's i need to replace.
I have another working motherboard and going to remove matching CAP's and
reuse them.(CAN I ?)
What's first SAFETY recommendatuion in this kind of procedure step by step please because this will be my first reccap.
Thanks.

[davmax]

Re: Reccaping by used CAP's recommendation.

Re-using caps is not recommended.

1. The usage may be unknown.
2. Importantly the act of removing is very likely to shorten life due to excess temperature for too long.
3. The lead seals are likely to be damaged.

When installing caps soldering temperature can be maintained for about 10sec max. (also depends on iron/solder temp) the shorter the time the better.

[GEOcros]

Re: Reccaping by used CAP's recommendation.

OK.
What's the market prices of 6.3v 2700uf and 6.3v 1000uf also 10v 1500uf CAP's?

[starfury1]

Re: Reccaping by used CAP's recommendation.

Agree with the above not a good idea to re used caps.


on "how to "
Here is willawake's fine post on how to do it and what you will need

https://www.badcaps.net/forum/showthread.php?t=485

I also recommend you practice on junk MB till you got it....hole clearing with a needle is the best way.....once you get it down pat theres a whole lot less chance of damage to the MB.

make sure you clean of any stray solder and go over you work with a mag glass....
one stray solder dag and it could be curtains for your fine handy work!

Make sure you use recommended caps too...stuff you get from hobby type stores will be crap and not suitable

Have a look round the FAQ's for other helpful hints

HTH, Welcome and Cheers

[starfury1]

Re: Reccaping by used CAP's recommendation.

That depends on where you live and who you buy from in oz say $2 per cap retail

if they are 10V caps you will get away with 6V3....it depends on location but usually they use 10V to lower ESR
normally they across 5 volt 3v3 volt rails.

but if you not sure post on it cause a 6v3 across a higher voltage and its good night Irene for the cap...that goes for any cap put across a higher voltage then its rated for

Post what mother board it is and people will post whats recommended...

if your in USA TC Forum owner can supply caps and cap kits for recapping
just PM him

Cheers

[GEOcros]

Re: Reccaping by used CAP's recommendation.

I live in USA but how i see CAP's prices are gone up like dozen eggs.
Have several MOB's and LCD monitors, are they using same kind of capatitors?
I went on RUBYCON web site but i don't know what to loock for, how i see all they are
by diferent names.
Any manual for first time users how to identify them?

[davmax]

Re: Reccaping by used CAP's recommendation.

Simply send a private message to Topcat in this forum specifying cap values and quantities required.

[starfury1]

Re: Reccaping by used CAP's recommendation.

like damax said

also see the FAQ's for list of caps and cap makers

Runy MCZ for caps around CPU know as VRM outputs Caps....check the MB sub section for the MB's you got let the posts be you guide... plenty of info on the forums
on what to use for what.

Cheers

[starfury1]

Re: Reccaping by used CAP's recommendation.

had to run when I did the post above so runy :lol should have been Ruby

yeah it does depend a bit on the application

here in the FAQ is willawake list of good caps to use

https://www.badcaps.net/forum/showthread.php?t=2280

As I advised, look at what MB's you have and search for posts on them

but to give you a rough outline.

On an MB there are 3 basic areas of caps
ones that are dotted around the MB
(you could extend the dotted one into 3 or 4 sub areas too
ports video memory)
ones that are used for VRM input and
ones that are used for VRM output


The caps that make up the VRM
(which is the old term for Voltage Regulator Module, basically the psu for the CPU)

thats this section here




The large ones around the CPU socket are VRM output capacitors (9 in total) (originally 4 Sanyo WG)

Those Caps MUST BE replaced with Quality "LOW ESR" types Such as rubycon MCZ, Panasonic FM etc


The larger ones near the black boxes (which are Mosfets) and yellow connector are VRM input Capacitors (2) (KZE)

These Still need to be Low ESR types but often you may find a lower grade or different caps there
you can replace with higher grade as in the output the output caps you use for replacement
(watch voltage thought)

These caps in the VRM are the most likely to have failed
output cap usually first but not in all cases

If you find one popped one replace ALL of them

in the case of the MB above

this was the original setup below





There are 2 smaller ones near the ram socket these again will probably be of a lower grade

There are 3 caps alone the AGP connector
(in this case they were MBZ rubycon)
you may find lesser grade but replacing higher grade is probably a good idea

the ones dotted round the board like the above can be replace with higher grade ones but its more a matter of cost

one forum member I believe will just put MCZ in all positions
(but I think he bought them by the truck load )

Some MB's are just full of crap caps and recapping the lot is the best idea ...normally anything over 470uf (or 330uf) are possibles for replacement.

It depends on who made the caps and the series used.

The other thing is Voltage as I mention you will in the VRM section find 10V caps used you can replace with quality 6v3
as I explained it cause they used crap and 10 volt caps have lower ESR

If you find 16 Volts on a MB you are best advise to replace with 16V or above its possible it might be on a 12 Volt rail.

it can get a little complex here, you can measure the voltage across it.
but I leave this for now, as it does take on a few aspects

I have tried to condense a lot of info so this is not complete in anyway...you need to do some research or alternatively post what you got.


On LCD and really not my field

there are two main places of failure with regard to caps

POWER SUPPLY and INVERTER

usually crap is used and the caps pop
you can fairly well follow the best for switchmode power supply replacement
with these

Such as Panasonic FC maybe Rubycon ZL
(you dont need to use super low esr caps like MCZ)

There inverter I am not totally sure with but "I think" the above are ok
it may depend on the Inverter its self so again either search or post model.

Photos are always a great help as some of these same parts are used in different models and manufactures especially in regard to inverters

one thing with inverters is the transformers can fail, you may repair it and it soon fails again so just be aware of that point..if it bounces back.
(normally I think it will have blown trannies also not just a cap problem)

OK like I said not complete and I may have missed or stuffed something up but hope it helps

The original post were I got the photos from is mine so go read it as to why I went from 4 to 9 if your wondering Here

Cheers

[Leung Kai-yan]

Re: Reccaping by used CAP's recommendation.

Hi.
I have Motherboard and i know which CAP's i need to replace.
I have another working motherboard and going to remove matching CAP's and
reuse them.(CAN I ?)
What's first SAFETY recommendatuion in this kind of procedure step by step please because this will be my first reccap.
Thanks.

Dear Friend,
If you find that the capacitors of your mainboard have the appearance of the bad capacitors, my past experience tells to replace all the capacitors or you will be very sorry later. Use new and good capacitors only.

[Leung Kai-yan]

Re: Reccaping by used CAP's recommendation.

Dear Friend,
Don't touch the printed circuits with the tip of your hot iron but the molten solder on the tip of your hot iron!!!