11 Sep
2010
11 Sep
'10
4:18 p.m.
I thought a video might be easier for you all to see the issue I am
having with restoring my Xerox Alto.
The issue I am having is the Diablo Disk drive does not power on fully
(I am measuring +15 and -15V on the drive, but +5V is only measuring at
around 2.5V. The lamps on the front of the drive do not light-up, and
the LOAD/RUN button does nothing, hence the door lock does not unlock.
Here is a link to the video: http://www.youtube.com/watch?v=mx80CvjuvyE
I have visually inspected all PCB boards and components, nothing seem to
be damaged. Also, the power supplies seem to be outputting power
properly (as seen via the RED voltage LEDS in the Alto card cage.
Any recommendations on how to troubleshoot the disk drive further?