On 7/2/25 11:25, Paul Koning via cctalk wrote:
On Jul 2, 2025, at 11:13 AM, Jon Elson via cctalk <[email protected]> wrote:
On 7/2/25 06:08, P Gebhardt via cctalk wrote:
Dear list members,
I was wondering if anybody is aware of VAX 86x0 schematics having survived the
product life cycle within DEC? I searched the web extensively but could not
find any hints on this.
It seems that DEC never published such details as schematics for the successor
of the VAX 11/78x systems, not even on microfiche, maybe due to the macrocell
array implementation (just a guess). All I could find is that there were
illustrated parts list on microfiche.
However, maybe Hewlett Packard handed DEC-internal documents over to a museum
such as the CHM? Or a former designer still have schematics in their archives?
Any pointers would be greatly appreciated!
I did have a KA630-AA print set at one time. That was about the latest prints
I have seen.
Jon
That makes some sense. Print sets were needed in older machines because FE would
actually replace failed components on a board. With "swap the failed board"
repair procedures, it isn't all that useful for support engineers to know how a board
works, much less what the detailed circuitry looks like.
Yes, we had an FE replace components on an 11/45. But, they
certainly NEVER did component-level repairs on an 11/780 or
uVAX-II.
Jon
