Have 1993 Hitachi projection tv. there is a white haze around images on screen.

The set needs to be focussed and reconverged. The red and blue images combined make a magenta/purple image. Adding green makes it white. Depending on the type of TV, if it's a CRT projection TV then there's an electronic focus control for each of the three tubes as well as the mechanical adjustment of the optical lenses. Given the description, then I'd have a look at the electronic focus first. A sudden shift in focus suggests that something in that circuit has given out. This would cause the red and blue images to go soft enough to create a halo around objects on screen.

It sounds like your drive jets are out of alignment. Ask your local TV repair places what they charge for re-alignments.

I have a Hitachi Ultravision. 55VS69A. It has worked wonders but now there is a blue screen in the center of the tv. Should I just replace the bulb. thank you.

alex

hello it could be screen burn

shaun

Good Day;

Sounds like your TV has a convergence problem. If you order KIT 10 from B&D ENTERPRISES at 1-800-458-6053 The KIT will include all parts neede and layout of part value & locations on simple paper lay out diagram. Or call FACTORY SERVICE;
1-800-448-2244.

Good Luck, big IRISH. PS or get from HIT Part X480293: kit.

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. 

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Sounds like a convergence problem. First, try using your set's user convergence mode.

http://www.hdtvoice.com/voice/showthread.php?t=15263

I would first check and see if any software updates are out on this set, you can call Hitachi, if not that then it could be the engine assemble having problems.

What model of set do you have?