The small PCB mounted on the back generates a blanking
signal that was
also correct.
Right. It's neen a long time since I've looked at one of these displays. Is
this a little PCB on top of the display PCB itself?
No, it is a small PCB mounted on the plastic frame, and it contains 5
TTL to calculate the framing signal from H and V sync. Should have been
done in the displaycontroller imho.
Now that's interesting. I am darn sure neighter of my IPCs has such a
PCB. There are 2 unused threaded studs on the back of the display
housing, is that where this PCB is fitted?
In my machines there's a 20 way ribbon cable that plugs into the logic B
PCB at one end and into the display itself at the other .The logic B PCB
(at least i nthe IPC I looked at first) is a 00095-60149
My guess is that there are several versions of this display (rather than
several Logic B PCB versions, since the Logic B PCB I have doesn't
generate a blanking signal).
Sometime (if I get time...) I'll pull my IPCs apart and note down the
numbers on the display module. And see if I can indentify any components
on it.
-tony
