29 Jun
2007
29 Jun
'07
4:14 p.m.
Can someone help me understand these old HP schematics?
I see the 15 adapter pins shown at the top right of the
page, and see where one of the pins (# 5) appears to go
to something labeled EIA IN on the "Logic Mother Board"
FWIW, 'EIA' was commonly used at that time (particularly by HP) to mean
what we'd normally call 'RS232;
section. Some pins (3, 4, and 6) appear to not be
connected to anything. Most of the others seem to go
to the Analog Mother Board, but I am not sure how to
follow them from there. What would be nice is if I
Given the one sheet of schemaatic that I've seen, you can't. You need
detailed schematics of the motherboards to trace the signals to pins on
the plugin cards (I assuem) and then scheamtics of the approprtiate cards
to see where they go in the 'real' electronics.
Do you have that information?
-tony