Re: DX7 Memory Corruption

"[email protected] [YamahaDX]" <[email protected]>
Newsgroups gmane.music.equipment.yamaha-dx
Message-ID <[email protected]> 
A diode like 1N4001 - 1N4009 would be 'much to big'. The very common 1N4148 will do the trick! The diode (D4) will bar the way of the PSU's 5Volts to get to the battery (due not rechargable!). If the synth is OFF the voltage of the battery goes across the diode to Pin24 of the RAMs to keep the content stored. The capacitor (10µF/16V) acts as a kind of 'buffer' to stabilize that voltage(s) a bit more.
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