Re: DX7 Memory Corruption

"[email protected] [YamahaDX]" <[email protected]>
Newsgroups gmane.music.equipment.yamaha-dx
Message-ID <[email protected]> 
Okay, I found a datasheet for M5M5118P 16k-B1T (2048-WORD BY 8-BIT) CMOS STATIC RAM, which may or may not be the same chip, but the standby current for that one is up to 10uA, and there are three of them, so it seems I was wrong about that - the 10uF capacitor wouldn't power them for more than a few seconds.

Maybe there's some current through the diode but not enough?  Either way, I'd start with that. It's an easy component to replace, and a cheap one.

- Andy
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