Manufactured in 1999. Screen started shrinking to small area then expanding to full screen while cold. After heating up, problem went away. I sprayed several IC with cold spray and narrowed problem to hotside controller, an optocupoler and a could other IC (don't remember what they were). During cold spray I got pincushion problem and convergance issue. Looks like pincushion is causing guns not to align. I replaced the suspect IC. The flickering stopped, but the pincushion and convergance is still bad. I suspect bad ICs blew out something else. I really would like schematic, but having trouble finding one.
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Re: Convergence & Pincushion Problem
I had a similiar problem. My screen would shrink in then expand. After a few months of doing this it just broke altogether. No sound or video. Its not fixed. You can get a repair kit from this site. http:///www.magnavoxhelp.com
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yes. has a pincushion circuit problem. since tv works and then starts to bow, its a bad solder connection. when tv warms up the metal expands and looses connection. when cold, the solder constricts and unit works fine. just solder deflection area. you can probably tap on board and locally find area to solder.
Sorry Ginko, but a convergence problem would have the curves down from the top and up from the bottom. The hourglass shape is a pincushion problem. This can be as simple as a bad capacitor in the pincushion circuit.
Could you please confirm the model number so I can look up the probable part?
If the mis-convergence is only noticable on the left center and the top and bottom left side of the screen is good, then it sounds more like a pincushion distortion problem rather than a convergence one. Otherwise, you could have a bad pair of convergence IC's or capacitors / solder connection problems. I would doubt that adjusting the service menu would correct this problem, and you could make it much worse by trying. Better have a technican work on it if the picture quality is still good otherwise.
DUDE!!! Both manuals are available at http://www.servicemanuals.net/ I dont know where you tryed before to get a manual for these sets but both modela are available online at like 20 differant spots.. This one site is the one I trust the most, as they have 99% of any manual I have ever Needed. Good Luck