Screen is all shrunken and in one corner...Convergence Problem... i think
On power up the picture is about one third the size of the actual screen size. The edges of the picture that is displayed are non uniform and almost have a rounded appearance. The picture displayed increases and decreases in size at random. After the set warms the picture gets larger and becomes more stable - sometimes. However the full picture size is never achieved. The color is also strange, but i think this is due to the strange size. I have read several other posts that say this is a convergence type problem with IC's or the Convergence Board. I looked for parts but there are no specifics, and i dont know exactly what to look for either.
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Re: Screen is all shrunken and in one...
I had the same issue. The screen would shrink and then expand over and over. After thrity minutes it would correct itself. After a few months of doing this it just broke - no sound and no videe but the power light was still on.
I searched these forums but did not find clear instructions or kits on how to fix it. I gave up and called in a repair tech. He fixed my TV in less than 30 minutes.
To help others I documented the fix and created a repair kit and step by step quide on how to fix the problem. You can find it here. http://www.magnavoxhelp.com
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projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.
Common Problem #1) Convergence has gone out
Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.
Common Symptoms include....
Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.
TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.
Common Problem #2) CRT Fluid is Cloudy
Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.
The tv have a problems known as a convergence problems,it dead.Any colors lines R,G,B mis alignment anywhere in the picture screen.The tv convergence board have dead 2 STK convergence ICS and some or all it resistors are dead.These parts must be replaced on the tv convergence board to solved the tv picture convergence problems.
Ur convergence is dead.U Know how to solders?Must replaced the 2 Convergence ICS and all it resistors.Tries Tv Repair World.com,Tvrepairkits.com for the convergence kit to repair it ur self.The shop will cost u $300 for parts and labors.
Replace Both of your STK convergence ICs STK392-570 If this is not number on your s use what it has on them. you can call MATs 1-800-628-1118 o Main STK is what is going bad when IC goes out all together TV will shut down and will not come on. So replace BOTH STKs ASAP! you will also need Heat sink compound to put on back of New ICs.
unfotunatly the itc222 has no convergence ics it uses a series of trsansiitors. the fact that u have some areas of the screen clear may mean you need a technician to do a service alignment. when you go into setup does the convergence crosshairs move up and down and side to side on both the blue and red? if they do their may not be a problem with the power board. ONe more thing if you replace this board you will still need a technician to do a service alighnment