8 Nov
2014
8 Nov
'14
3:01 p.m.
It's a
very simple circuit, the schematic is in the TechRef. One odd
feature is that
there is no horizontal oscillator, it just drives the horizontal section
from
the pulses on the Hsync (more correctly HDrive) input.
This is the same situation as the Osborne Vixen + Zenith 7" display. The
display takes in a horiz. signal (a vert. as well, but that's another
matter) which gets routed to a transistor, and then a 555 timer. From
there, one more transistor and then comes the horiz. driver & opt. section.
Anyway, the first two transistors and the 555 are collectively labeled
"horizontal oscillator".. but that's not exactly the case, is it?