6 Oct
2006
6 Oct
'06
5:28 p.m.
Heh... I owned a working VT220 for *years* until I
owned a broken one ;-)
The most common cause I've seen on those, BTW, if the video and
keyboard work (i.e. - not a flyback problem) is the 9636/9637 EIA
Actually, I've found VT220 flyback transformers to be very reliable,
which is more than I can say for the ones in VT320s and VT330s...
Anyway, a common problem I've had with VT220s is a loss of horizontal
lock. The cure seems to be to remove the case, then turn the 'H Hold'
prset from end to end a few times, then power up and set said preset to
the midpoint of the range where the horizontal deflection locks. Turn off
and on again to make sure it locks correctly at power-up.
Oh yes, one other tip. Extend the 'leg' fully before trying to get the
case off.
-tony