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jjbunn
Joined: 28 Mar 2008 Posts: 11
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Posted: Fri Mar 28, 2008 5:27 pm Post subject: MicroKorg burned 3.3V regulator - parts? |
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I have a MicroKorg with the flakey behaviour associated with loss of the 3.3V supply (unresponsive pots, many functions unavailable etc.).
Looking around the 3.3V circuit, the regulator chip IC5 looks a little burned at the terminals. I measure 9.5V on its input and 4.99V on its output.
Anyone know where I can buy a replacement? The component is a Seiko IC-S-8520F33MC ... Mouser used to have it, but no longer, Jameco don't have it, nor do Newark: it appears to be obsolete.
(The 8520E33MC looks to be a better choice, as it has overload protection, but I can't find that available anywhere, either.)
I wonder if, in a pinch, I can replace the IC with a 3.3V Zener and a resistor ...?!
Any advice most welcome. |
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jjbunn
Joined: 28 Mar 2008 Posts: 11
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Posted: Sat Mar 29, 2008 6:02 pm Post subject: |
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I'll answer myself: http://www.korgparts.com/ have the semiconductor parts. I ordered two of IC5, one of F1 and a Service Manual from them.
I'm hoping the CPU itself isn't damaged, because replacing that sounds like a very ticklish operation. |
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