Re: Not-so-dead DX7 Mark I - The saga continues...

"[email protected] [YamahaDX]" <[email protected]> 26 Feb 2019 21:45:02 +0000

Newsgroups	gmane.music.equipment.yamaha-dx
Message-ID	<[email protected]>

The diode is a candidate for causing that problem in a stock DX7, so I don't see why not.  Diodes are easy to replace, and you can try literally any physically small diode.

After that, look for capacitors to replace.  Start with the larger can shaped ones, especially any with swollen ends, or goo around them on the PCB.

But, yes, quite likely it's the diode.

- Andy