K5synth

2007/5/7, Wayne Griffin <ingsoc_1979@...>:
> Amidst all the ROM happenings on the list tonight, I
> opened up my K5M because I figured 18 years was a
> pretty good service life for an EPROM.
>
> My original factory chip read in on my programmer and
> the file from the group both md5sum to
> 26e2ecadadf6ca03c23bc3d85f37ee1e That gave me some
> confidence- I used a standard TI 27C512-15 in place of
> the original Hitachi. It appears to work well. RAM
> Patches remained intact.

You might want to dump your patches back on your computer and unplug
the lithium battery for a few seconds to clear the saved information
because sometimes there are errors in it and the K5 starts working
strangely. (At least, with my both K5s running V1.0 it happens)

>
> The original Hitachi HN27C512G-20 PGM 12.5V dated 8926
> was labeled:
>
> KAWAI
> P020H
> [K5m}
>
> Now, I'm going to be interested in replacing the
> display with something that I can see more clearly.
> Cheers, [w]

Well Wayne, are you able to read what's on your current display if you
adjust the contrast properly? You may need to replace both the EL
backlight and inverter then. (You can buy a foot of EL foil for $15,
instead of replacing the whole LCD worth $70 at the cheapest place I
found.)