Discussion about the Korg PolySix synthesizer

On Mon, 29 Jul 2002, Ellsworth wrote:

> I've been reading the more recent messages and it sounds like corrosion
> was still going on after all these years on the KLM-367 board even after
> the battery replacement which would explain the random patch changes.
> Hmmmm....

  Either corrosion-affected traces or parts are failing, or the CMOS SRAM
chip has reached end-of-life.  I've had to replace more than one SRAM
(even with no corrosion apparent on the board) due to age.  You might
double-check that at least 2.2 Volts is measured on pins 18 (plus) and 9
(minus) of the SRAM chip IC32 with the power off, and close to 5 volts
with the power on.

Crow
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