[sdiy] Ensoniq keyboard calibration advice?

[grant musictechnologiesgroup.com]

I have the schematics for the KPC HC11 board that you speak of. It's 1MB 
so I'm not sure everyone wants it email blasted. I had a spare KPC board 
way back when that I re-purposed into something or other for a local 
museum. No idea what that was but I probably have the HC11 assembler 
source somewhere...

GB


------ Original Message ------
From: "brianw" <brianw at audiobanshee.com>
To: "Peter Pearson" <electrocontinuo at gmail.com>
Cc: "synth-diy mailing list" <synth-diy at synth-diy.org>
Sent: 7/1/2022 4:32:19 PM
Subject: Re: [sdiy] Ensoniq keyboard calibration advice?

>Oh!
>
>I didn't realize that the ASR-10 is a couple of years newer than the VFX. This is probably because I got my ASR-10R directly from Ensoniq when it was brand new (subsequently stolen from me) and then I got my VFX many years later, used. I had assumed that *all* of the Ensoniq PolyAT keyboards used the same KPC circuit board mounted under the keyboard, with socketed 68HC11 processor and EPROM (plus maybe a few more).
>
>Are there any ASR-10 schematics around?
>
>Brian
>
>
>On Jul 1, 2022, at 3:25 PM, Peter Pearson <electrocontinuo at gmail.com> wrote:
>>  Hi Brian.  I know what you're talking about with the EPS keyboard.  The ASR10 keyboard I'm looking at is mostly surface mount and nothing is socketed.  The 2 keyboard PCBs have a ribbon cable between them.  I already cleaned and resoldered the connectors between the boards.  Feel you on the back sockets and oxidized pins though.  Very annoying when you come across that.
>>
>>  On Fri, Jul 1, 2022 at 4:58 PM brianw <brianw at audiobanshee.com> wrote:
>>>  I have no reason to doubt your statement, but...
>>>
>>>  Considering that I purchased my EPS new in 1988, I'm not exactly disappointed that some oxidization (or whatever happens to old socketed chips) had to be broken free after three decades. I didn't think I was buying military-grade equipment, and even military-grade equipment requires frequent maintenance for continued reliability.
>>>
>>>  At least it's not like the Apple /// ... where chips literally fell out of their sockets and the product stopped working.
>>>
>>>  Brian
>>>
>>>
>>>  On Jul 1, 2022, at 9:29 AM, Rainer Buchty <rainer at buchty.net> wrote:
>>>  > On Thu, 30 Jun 2022, brianw wrote:
>>>  >> Have you tried gently removing the main chip and then plugging it in again?
>>>  >
>>>  > Definitely good advice on Ensoniq gear. They used quite some crappy DIL/DIP sockets.
>>>  >
>>>  > Rainer
>>>  >
>>>
>>
>
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