Help identify this burned H4N regulator?

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toomuchfun
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Help identify this burned H4N regulator?

Post by toomuchfun » Thu Feb 16, 2017 9:31 am

I've got an H4n with a burned regulator IC on the power board. It's labelled IC12.
power.jpg
The part number has burned off, so I can't identify it in order to get a replacement. If anybody has a dismantled H4n, perhaps you can take a look at it and tell me the number. There are two numbers printed on it. The bottom number is the actual part number as far as I can tell.
Thanks!
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Wulfraed
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Re: Help identify this burned H4N regulator?

Post by Wulfraed » Thu Feb 16, 2017 8:35 pm

I'd be concerned that there is something else severely wrong to have burned out a heat-sinked regulator. Like a short between V+ and ground... Or using an AC adapter of the wrong voltage.
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toomuchfun
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Re: Help identify this burned H4N regulator?

Post by toomuchfun » Fri Feb 17, 2017 7:42 am

Good point, but I still need to identify the regulator before I can do anything else.
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26ezeork
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Re: Help identify this burned H4N regulator?

Post by 26ezeork » Fri Feb 17, 2017 3:38 pm

Since I just opened the H4N to search for a solution of the freeze problem, I searched the part yesterday and found it to be:
http://www.njr.com/semicon/PDF/NJM2845_NJM2846_E.pdf
It's a 3.3V voltage regulator.
I found using the top number a reference to this part. Which seems correct after checking the voltages.
Didn't solve my problem, but hopefully helpful to you.
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toomuchfun
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Re: Help identify this burned H4N regulator?

Post by toomuchfun » Sat Feb 18, 2017 1:51 pm

Excellent!! Many thanks, 26ezeork.
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Re: Help identify this burned H4N regulator?

Post by Jim_Fogle » Sat Feb 18, 2017 3:41 pm

toomuchfun I hope you'll keep us advised of your findings.

26ezeork, very nice of you to share your knowledge and include the link to the replacement part pdf file.
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