Comment on Purchased an Osborne MPV1024 monitor and it just works
SanguineBrah@lemmy.sdf.org 3 weeks agoThis monitor has no OSD or button to trigger a degauss. The coil will be wired directly to AC via a posistor, so it’s entirely passive and will only trigger again when the monitor cools down.
The distortion is caused by the high voltage arcing over, which droops and interrupts beam deflection for a moment. I wouldn’t want to run it this way for very long, because it can damage the flyback transformer over time (although the flyback could itself be arcing anyway).
JustARegularNerd@lemmy.world 3 weeks ago
Thanks for the heads up - it’ll stay as a very occasional use monitor until I either feel comfortable enough to look inside (after lots of research, given the voltages within) or find a friend experienced in CRTs. I really wouldn’t want to blow it up when it could’ve been prevented easily by maintaining it.
SanguineBrah@lemmy.sdf.org 3 weeks ago
Ragebutt’s advice is good RE: maintenance. I would take the back off, make sure it’s discharged then clean around the anode cap and in general make sure there is not excessive dust/soot that could form a path for electrical discharge. Clean the anode cap with alcohol, apply a little dialectric grease to the cup and put everything back together. There is a decent chance that will help, just make sure not to wipe off the black paint on the tube - this is called “aquadag” and it is important to the operation of the monitor.