what's a 2405?

[evildragon]

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..

[*o*]

heres a google search im not sure which is the best to look at...

[evildragon]

i tried a google search before asking

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

[gannon]

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

[evildragon]

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...

[gannon]

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]

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...

[gannon]

Datasheet: http://www.necel.com/cgi-bin/nesdis/o00 ... 2EJ2V0DS00
Product Info: http://www.necel.com/cgi-bin/nesdis/o00 ... e=UPC2405A

[evildragon]

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?

[sammy]

No, I think the maximum output current is different.