So I got Abit BX133 RAID for free, caps are corroded

[UtwigMU]

The caps have arived (some of them from UK).

Soldering is due on Monday. Friend's BE6 II will also be taken care of.

If it works, I'll put 1.1A in it and o'c it to 1.46.

[Greebe]

Hope those are of the same type. You really need "low DCR" caps (this is the MB's switching power supply for the cpu) and are of 105c rating... all other specs should remain the same.

You will most likely need a Hakko 470b or similar type desoldering station (~$500USD) to remove without damage to the pcb.

Sorry I missed this one as of late

[Dilitante1]

/me smacks Greebe for sleeping

[UtwigMU]

They are Rubycon.

They are 105°C.

Also I bought caps that sustain higher voltage

1500/10, 1000/10 (both instead of 6.3), 100/16 are the same and 10/25 will be replaced by 10/35.

Generally the board was a freeby and I'm taking this as a risk.

We'll see.

I've borrowed a Celeron 333, 32MB of RAM and I have 3 spare graphic cards and PSU. If it posts, I'll burn it in on a bench for about a week.

[rylan]

You should be fine with those. Electrolytic caps are generally pretty robust when it comes to voltage, but there isn't anything wrong with getting a higher rated cap as it will just provide more margin.. even though its only getitng a couple volts.
Those old bad ones look really fugly.

Greebe, do you mean 'low ESR' caps? Electrolytic cans don't really come in many differant resistance types... but for the power regulators on motherboards it'll just impact efficiency. In fact if you go with new ceramic caps that have extremely low series resistance you can actually make the regulator unstable, even though efficiency would be higher :P

[Greebe]

This really doesn't have anything todo with Voltage ratings but rather frequency of operation and leakage current under load. You shouldn't have any problems, but there is always that possibility.

Removal will be most difficult without proper equipment.


Yes Dilpickle, twas sleeping on the job, about time I got a break

[UtwigMU]

Success!!

All caps replaced on both BX133 RAID and friends BE6 II.

Both boards passed memtest86 with Celeron 366 and 32MB stick of RAM.

Also removal was a breeze.

[UtwigMU]

Before

[UtwigMU]

After

[UtwigMU]

Desoldering was very easy:

One just heats the capacitor from the back side and pulls it out. Just watch so that your hand doesn't slip.

The friend did the soldering, but I tried to remove two caps and although I held the iron for the first time it wasn't hard.

After the capacitor has been removed, one needs to remove the solder from the holes in order to make room for new ones.

The procedure that works (no need for high end Hakko desoldering station).

One heats up solder from the back with Iron, while a person that helps drives a needle throguh the hole.

Then you just put the new capacitor in the place and match correct polarity.



The board powered on and passed memtest86 as opposed to before when it would not post.

I'll connect it to the bench when I have time and move the data from my old HDD.

[UtwigMU]

Got Celeron 1.1A to post at 1.47 today.

Backing up old drive, installing Windows.

[Brian R.]

Good job!

[Kurt]

tsk...what of tidying capacitors and all?