Shuttle SK4511 bad caps

Stein411 · 11-24-2009, 05:07 PM

I certainly hope I have the motherboard number correct, it's been a real bear to try to figure anything about my Shuttle KPC K45 barebones system.

I run this little box as a windows home server and it just up and quit posting on Monday night.

Close examination of the mobo reveals that one capacitor has blown out the top and another has a bulged top.

I'm trying to find good replacements for these and want to be 100% sure I'm getting the right components. Unfortunately it's been many years since I completed my electronics engineering associates degree, and it's mostly left me.

These capacitors appear to be OST manufactured, on is marked as such:

OST 6.3v 1800uf
RLZ 105c O734

the other is marked as such:

OST 6.3v 1800uf
RLZ 105c O736

Can anyone point me at the right components to replace these with? I'm actually excited at fixing my own motherboard, saving a huge amount of $$ and regaining that functionality that is missing, and it's just plain cool to do at least some light electronics work again.

Thanks!

c_hegge · 11-24-2009, 08:34 PM

Hi and welcome to badcaps.net!

Rubycon MBZ/MCZ are generally fine for motherboards. They are available here at badcaps.net. Panasonic FJ and FL and Sanyo WG are also fine, but they are much harder to get hold of. Also, don't just replace the busted one(s) as OST will often fail without showing any visible signs. Replace anything from 470uF upward, even if it isn't bulging.

PCBONEZ · 11-24-2009, 09:15 PM

I've never heard of OST RLZ series.
Sure that's right?

kc8adu · 11-24-2009, 10:34 PM

iirc thats supposed to be on par with mbz.that is if you can believe in ost specs.
i just poly these little cap baker boxes.
post pics of this board and we will look at it.

c_hegge · 11-24-2009, 10:42 PM

Didn't think of that, kc8adu, poly-modding would be a good idea for a SFF computer as it would get hot in there. Oh, and aren't RLX supposed to be the OST equivilant to ruby MBZ?

PCBONEZ · 11-25-2009, 02:14 AM

Yes... But these are apparently RLZ which could be anything for specs.
Common mobo OSTs approximate equivalents...
RLA ~ Rubycon MCZ
RLX ~ Rubycon MBZ
RLS ~ Rubycon ZL
RLK ~ Nichicon HE or Chemicon KY

Stein411 · 11-25-2009, 06:40 AM

Thanks for all the great replies first off!

I can confirm they are marked as RLZ on the caps themselves.

I've got a new camera on it's way (x-mas present for the wife) that is supposed to have a great macro mode on it, as soon as it gets here I'll snap some pictures and post them up.

Stein411 · 12-01-2009, 05:30 PM

OK, as promised... here's some pictures, finally.

PCBONEZ · 12-01-2009, 08:26 PM

Yup, that's a Z alright.
2007 date code too and OST doesn't even have a data sheet out.

They are being used in Vcore and RAM too so I would use higher grades like:
Rubycon MBZ or MCZ, Panasonic FL or FJ, or Sanyo WG .....
or maybe Nichicon HN [with date codes 2006 or newer].
.

walklookseek · 01-12-2010, 01:08 PM

Quote:

Originally Posted by Stein411

I certainly hope I have the motherboard number correct, it's been a real bear to try to figure anything about my Shuttle KPC K45 barebones system.

I run this little box as a windows home server and it just up and quit posting on Monday night.

Close examination of the mobo reveals that one capacitor has blown out the top and another has a bulged top.

I'm trying to find good replacements for these and want to be 100% sure I'm getting the right components. Unfortunately it's been many years since I completed my electronics engineering associates degree, and it's mostly left me.

These capacitors appear to be OST manufactured, on is marked as such:

OST 6.3v 1800uf
RLZ 105c O734

the other is marked as such:

OST 6.3v 1800uf
RLZ 105c O736

Can anyone point me at the right components to replace these with? I'm actually excited at fixing my own motherboard, saving a huge amount of $$ and regaining that functionality that is missing, and it's just plain cool to do at least some light electronics work again.

Thanks!

I have the same problem as yours on my K45. I found 3 bulged top caps.
one OST 10V 1000uF RLP
two OST 6.3V 1800uF RLZ
Coulnd't find the spec for the RLZ and searching by google with the keyword OST RLZ leads me to this post.
Please let me know what do you use to substitute the bad caps.

calati · 04-17-2010, 08:54 PM

I am in the process of recap a SK4511 pc shuttter board. mine have two 1800 6.3V bulged. I bought the caps from here and awaiting to have to mount it. I hope this resolve the problem. Mine turn on but does not go to POS state and nothing come to the screen. I am hoping this bad caps are the problem and when replace have my motherboard working again.

cross finger. I will post the update when done.

bogolubs · 05-15-2010, 12:30 PM

To replace all of the OST 10V 1000uF RLP, OST 6.3V 1800uF RLZ and OST 10V 1500uF RLX caps on the board, I've got these in my Badcaps online store cart:

Rubycon 1800uF 6.3v 8mm MCZ Series (qty 8)
Rubycon 1000uF 10v 8mm MCZ Series (qty 4)
Rubycon 1500uF 10v 8mm MCZ Series (qty 4)

I'm concerned about ordering the 1500uF 10V in 8mm, as the current caps look wider than that. What have others ordered? Do the other two Rubycon cap parts look right?

sonicdon · 07-18-2010, 04:32 AM

Quote:

Originally Posted by bogolubs

To replace all of the OST 10V 1000uF RLP, OST 6.3V 1800uF RLZ and OST 10V 1500uF RLX caps on the board, I've got these in my Badcaps online store cart:

Rubycon 1800uF 6.3v 8mm MCZ Series (qty 8)
Rubycon 1000uF 10v 8mm MCZ Series (qty 4)
Rubycon 1500uF 10v 8mm MCZ Series (qty 4)

I'm concerned about ordering the 1500uF 10V in 8mm, as the current caps look wider than that. What have others ordered? Do the other two Rubycon cap parts look right?

Hi, have you replaced the 10mm OST 1500uf with the MCZ 1500uf 10v 8mm?
Any issue?

c_hegge · 07-18-2010, 05:16 AM

I don't see why it wouldn't work. If you really want to stick with 10mm, then use these:
http://www.badcaps.net/store/product...products_id=40

PCBONEZ · 07-18-2010, 09:00 AM

Quote:

Originally Posted by sonicdon

Hi, have you replaced the 10mm OST 1500uf with the MCZ 1500uf 10v 8mm?
Any issue?

The 10mm have leads spaced at 5mm.
The 8mm have the leads spaced at 3.5mm.
Unless the board is double drilled to take either size you will have to bend the leads and you will need room for the caps to sit higher.

Other than it's a little more trouble to mount them, they will work fine.

.