Identify Hanns-G HC194D XAD819AR cap

[deskjockey]

I put some new caps in because it was taking 20 minutes to boot. And it worked fine for 4-5 minutes before another capacitor smoked and blew. This is one of those tiny ones with no legs. Looks like 2 silver posts with plastic between them. I've enclosed a picture link with a couple arrows (one to a good one and one to the toast). Do you know what capacitor that is and if so is there some polarity for this style?

http://s43.photobucket.com/albums/e3...HANNSPS002.jpg

[PlainBill]

Re: Identify Hanns-G HC194D XAD819AR cap

I put some new caps in because it was taking 20 minutes to boot. And it worked fine for 4-5 minutes before another capacitor smoked and blew. This is one of those tiny ones with no legs. Looks like 2 silver posts with plastic between them. I've enclosed a picture link with a couple arrows (one to a good one and one to the toast). Do you know what capacitor that is and if so is there some polarity for this style?

http://s43.photobucket.com/albums/e3...HANNSPS002.jpg

Note links in my signature on attaching pictures using Manage Attachments (not inline). For several reasons it is preferred pictures be hosted on this site.

It's a poly cap, and when you attach the picture to your next post someone may be able to identify the value.

PlainBill

[deskjockey]

Re: Identify Hanns-G HC194D XAD819AR cap

Plaine Bill,

Thanks,

I read the picture link about 6 times and got confused. The last two post said that all that preceded was now in error. It said the new software required to copy the link and paste. So that is what I did. But now reading it again it mentioned a picture icon so I tested each icon and I think I found it.

[deskjockey]

Re: Identify Hanns-G HC194D XAD819AR cap

Plaine Bill,

Well it looks like the icon method didn't work so I'm trying the original method.

[PlainBill]

Re: Identify Hanns-G HC194D XAD819AR cap

Plaine Bill,

Thanks,

I read the picture link about 6 times and got confused. The last two post said that all that preceded was now in error. It said the new software required to copy the link and paste. So that is what I did. But now reading it again it mentioned a picture icon so I tested each icon and I think I found it.

No.

Make sure the picture is no more than 2000 pixels by 2000 pixels. When you enter text scroll down and click on 'Manage Attachments'. On the window that pops up, browse to the location of the picture on your computer. Click on 'Upload'. When you have completed entering text and the picture has uploaded click on 'submit Reply'.

If a 60+ year old guy can handle it, so can you.

PlainBill

[PlainBill]

Re: Identify Hanns-G HC194D XAD819AR cap

Plaine Bill,

Well it looks like the icon method didn't work so I'm trying the original method.

That worked. Argghh!!!! I'm losing it!!! Those are surface mount ceramic caps. There is no polarity BUT they have been known to short internally. Identifying their value is a PITA without a schematic.

PlainBill

[momaka]

Re: Identify Hanns-G HC194D XAD819AR cap

Identifying their value is a PITA without a schematic.

I usually just replace them with ones of the same size. Seems to work fine (or maybe I've been lucky every time). I still find it better odds than finding a schematic, though.

[deskjockey]

Re: Identify Hanns-G HC194D XAD819AR cap

PlainBill,

You are correct, add another 64 yr. old that can do it.

Momaka,

I never found a schematic either. Did you find your ceramic caps at a local supplier or online. Where did you get yours? How did you measure it, I can't even see it?

[momaka]

Re: Identify Hanns-G HC194D XAD819AR cap

Did you find your ceramic caps at a local supplier or online.

Neither, actually. I just have a bunch of dead motherboards and video cards around and they all have plenty of these.

If you're in the US, though, you can get these caps online from either Digikey or Mouser. Locally, I'm not sure where to get these, other than other broken electronics .

Normally, I just replace the bad ones with others of the same physical size.

I suggest measuring them in millimeters, since you can then use that size to find a proper replacement online. For example, a 1608 (metric) multi-layer ceramic cap is 1.6mm long by 0.8mm wide.
The ones on your board seem bigger than that - probably something closer to 2012.

[jetadm123]

Re: Identify Hanns-G HC194D XAD819AR cap

If that cap is connected to a pin of an integrated circuit or transistor, then one may be able to go back to the spec sheet for that device and make an educated guess as to what the value is.

Another possibility is to measure the capacitance of the good cap to the left of the burned one in the hopes that they're identical. Know anyone who has a cap measurement function on their meter?

[severach]

Re: Identify Hanns-G HC194D XAD819AR cap

The burned cap is in parallel with several other caps. All it does is keep the circuit under control if all the other caps go bad. It doesn't need to be there so it's value isn't important and you can replace it with any size you want so long as the voltage is sufficient. If the circuit works it will work fine without it.

I would ensure that all of its remains are cleaned up then I'd go looking for what burned it out.

[deskjockey]

Re: Identify Hanns-G HC194D XAD819AR cap

Guys thanks for the input. I think when I soldered that maybe it shorted from splatter or runny solder. The two posts are right on top of each other from the replaced cap and this one. I'm going to check my old boards for a cap to use although most of my stuff is from the 60's. I'll see if anybody local has such stuff.