what's a 2405?

Includes but not limited to: SNES, Genesis, Sega CD, PlayStation 1, Nintendo 64, Dreamcast, Game Gear and I guess the Virtual Boy.

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evildragon
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what's a 2405?

Post by evildragon » Sat Oct 14, 2006 7:46 pm

im trying to repair my Sega CD, and found an odd voltage regulator..

im used to the 78 series, but what's a 2405? im guessing it's 5v, but what does it "do" differently"?

model 2 CD..

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*o*
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Post by *o* » Sun Oct 15, 2006 2:11 am

Penn & Teller wrote:It's BULLS#%@

evildragon
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Post by evildragon » Sun Oct 15, 2006 10:38 am

i tried a google search before asking :roll:

non of those help... it's like the 2405 isn't real..

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gannon
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Post by gannon » Sun Oct 15, 2006 12:25 pm

Knowing what package it is in would help too, so would knowing the pin count and any other markings on it.

evildragon
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Post by evildragon » Sun Oct 15, 2006 12:29 pm

gannon wrote:Knowing what package it is in would help too, so would knowing the pin count and any other markings on it.
it looks exactly like a 7805...

Image

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gannon
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Post by gannon » Sun Oct 15, 2006 12:32 pm

Ok, so 3 pin TO-220 with the markings 2405. Also, not all 7805s are in that package, some are in a TO-92, TO-251, etc..

evildragon
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Post by evildragon » Sun Oct 15, 2006 12:53 pm

gannon wrote:Ok, so 3 pin TO-220 with the markings 2405. Also, not all 7805s are in that package, some are in a TO-92, TO-251, etc..
oh ok, i thought all 7805s were the to-220...

the other marking on the thing is NEC Japan.. it has other numbers on it, but im not home right now, and can't read it...

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gannon
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Post by gannon » Sun Oct 15, 2006 1:00 pm


evildragon
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Post by evildragon » Sun Oct 15, 2006 1:16 pm

ok, thanks...

the 2405 in my Sega CD gets VERY hot... can this be a problem point in my sega CD?

mainly, as posted on many other forums (and no real answers as to what the solution is), it plays music CDs, but fails on Sega CD games, be it original discs or backup CD-Rs.. but if I let it "warm" up for about 20 minutes to 4 hours, it plays game great, problem free..

being as how hot the 2405 gets, is it possible it's the cause of it? and if so, can a 7805 be a direct replacement?

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Post by sammy » Mon Oct 16, 2006 5:08 am

No, I think the maximum output current is different.

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