Out of the blue, my picture on my Hitachi 43FWX20B went bad, on the top and bottom of the screen there are semi circles that compact the center of the screen and stretch the right and left edges. what should be a straight line along the bottom appears bowed giving the picture a hour glass on its side appearence. along with that the convergence is all out of whack. I tried the magic auto focus and manual focus to no avail any help would be appreciated
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Re: Horizontal hour glass picture
The convergence Ics need replaced. In Hitachi, resistors and sometimes a coil needs replaced as well. The convergence/deflection PCB is available, but, the cost of that board is higher than having a servicer come to your home and repair the unit to component level.
If you are not familar with this circuit, then call a servicer. Have them replace both ICs not just one. Make sure they are repairing to component level and not replacing the board.
Hope this helps.
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I'm not sure if this model is the one that has resistors that go bad. You can actually purchase a pack of resistors in a kit. It will come with solder, the resistors and instructions. You can lay the tv out and take the circuit board out to find the blown components, and replace the bad ones. Takes about an hour start to finish and will cost around $65.00. It has been a few years since I did this, so I'm not sure on the price.
Since you don't have any white lines with the red screen/picture I would say that the red bulb (CRT) is conducting too much. There is an adjustment control for that. The 'sceen' control is behind the speaker cover and service cover. Turn red screen control slightly to the left until you get a good black and white picture.