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Old 03-04-2020, 03:21 PM   #1
AndreStarTrek
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Default Are this caps something special?

I been repairing special mainboard for a exposure machine but after replacing a chip and some cleaning it seems not to boot correctly so seen the machine is about 25 years, I have replaced all the caps with cheap chinees caps because that was something i have in stock. But after that there was no life at al. Been probing with a oscilloscope but noting.

So I been thinking, sure the cheap chinees caps are not the best but noting at all seems a bit strange. Are this something special?




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Old 03-04-2020, 03:44 PM   #2
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Default Re: Are this caps something special?

those are just regular - low-spec electrolytics.
i replace them all the time in sega gamegear consoles.

i would have replaced them with SMD tantalums
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Old 03-10-2020, 10:56 AM   #3
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Default Re: Are this caps something special?

Quote:
Originally Posted by stj View Post
those are just regular - low-spec electrolytics.
i replace them all the time in sega gamegear consoles.

i would have replaced them with SMD tantalums
Thanks, I take it using tantalum caps that capacity is not a big deal, if I at least meet the minimum requirements?

Last edited by AndreStarTrek; 03-10-2020 at 10:57 AM..
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Old 03-10-2020, 12:27 PM   #4
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Default Re: Are this caps something special?

tantalums are better and probably smaller
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Old 03-11-2020, 05:44 PM   #5
AndreStarTrek
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Default Re: Are this caps something special?

Quote:
Originally Posted by stj View Post
tantalums are better and probably smaller
I understand that, but that was not what I was asking I like to know if it could be a problem if i use tantalums, would it be a problem if the capacity are bigger that the normal caps that are on the board right now?

I dont think it would, but want to be sure.

Last edited by AndreStarTrek; 03-11-2020 at 05:45 PM..
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Old 03-11-2020, 07:45 PM   #6
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Default Re: Are this caps something special?

there is no problem as long as the voltage rating is atleast 1.5x what it is connected to and you dont put them in backwards!

company's like apple and sun etc used to cover the boards in tantalum caps - the only reason they stopped is cost.
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Old 03-11-2020, 10:55 PM   #7
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Default Re: Are this caps something special?

Tantalum cap:
https://www.arrow.com/en/research-an...lum-capacitors
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Old 03-13-2020, 02:50 PM   #8
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Default Re: Are this caps something special?

Just use 50V parts and you should be okay. Kemet produces 50V parts for both 10 and 33uF tantalums, search for T52X serie.

Use a Panasonic [email protected] SMD electrolytic, it should fit. EEE-HC serie.
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Old 03-17-2020, 06:05 AM   #9
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Default Re: Are this caps something special?

Thanks for all you reply's.
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