5 Nov
2005
5 Nov
'05
4:45 p.m.
Is this the PSU that's shown in the
boardswapper manual? It doesn't give
much detail (for some odd reason you replace the complete PSU, not just
the faulty board...), but there are a couple of pictures of it.
Yes, it is the one in the boardswapper guide. In this special case, it
is a "complete assembly exchange" guide. It's clear
the light pen was fairly hardware-intensive. Many of the video
timing signals, including the outputs from the horizontal counter on the
text PCB, go to the light pen controller.
The light pen itself is a fairly simple piece of hardware, but the