Hi Jerry,
The HP 88780 the OEM version of the 7980. A service
manual is available at
http://www.bitsavers.org/pdf/hp/tape/07980-90030_88780Svc_Oct91.pdf
(courtesy of Al - Thank You!)
I didn't look thru it to see if had a power supply
board schematic, but thats where I would start.
Good luck!
Lee COurtney
--- g-wright at
att.net wrote:
I have not been able to come up with any source of
this. Did HP
ever release this information. It is the main Power
supply and
servo board interface.
- jerry
Jerry Wright
JLC inc
g-wright at
att.net