[sdiy] Ensoniq ESQ-1 Serving Questions

[Scott Nordlund]

> That's a cluster of 8. From my experience with those machines, I 
> somewhat doubt that it's diode-related, but rather a defective keyboard 
> controller.
> 
> The keyboard is organized in 8 rows of 8 columns. So if you select a row 
> (a cluster of 8 consecutive keys) with a diode tester, you should see a 
> connection to the 8 individual columns: for these you have either the 
> idle column or the pressed column.

If you're lucky, it could be a broken connection somewhere.  You should be able to figure it out with a continuity tester and/or logic probe.

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