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Hantarex MTC 9000 image squashed vertically
be77amyX:
Hi, I have a problem with my Hantarex monitor where the top inch of the screen is brighter than the rest of the screen and seems to squash the image. Playing with the vpos adjustment seems to stretch the image from the top edge instead of moving the full image. Any advice on this issue would be much appreciated? Thanks
edit: see image
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be77amyX:
UPDATE: So I noticed the pot for Vshift felt a lot rougher than the rest so I swapped out the remote board with another one from a dead chassis and the brightness in the upper section seems to have disappeared but the geometry issue still remain.
here's a photo:
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grantspain:
it could be just a cap in the vertical circuit, possibly a faulty vertical ic
be77amyX:
I think I replaced all the electrolytics when I first got the chassis (it's had this issue a while) what's the component number for the IC I could try swapping out with the scrap board I have? Btw that board had a busted lopt when I got it which I replaced but when I hooked it back up there was lots of arcing round the suction cup so I've never dared attach it to my good tube! What could cause that?
grantspain:
tda1675a at ic1
arcing around anode is either dirt around anode or HT is too high