Question about Hitachi UltraVision CineForm 55VG825 55" HDTV
Recently our big projection TV only started showing programs in blue, yellow and grey's. seems to be missing reds and other colors. when we do the magic focus and other menu troubleshooting we can see the TV showing red but the picture doesn't. does this mean our TV is done or is it something that can be fixed. i was thinking it meant a bulb was out but maybe it is an electronic thing? what can we do to diagnose the problem and decide whether it is worth having it fixed?
it sounds like your blue convergence ic is getting weak you need to replace the ic's STK392-110 and you should replace both because when 1 is bad the other will go real soon. They are inexspensive at the sight I posted and you will also get free tech online support if you purchase them there.
Posted on Apr 13, 2008
you will need to replace both convergence ICs they are STK392-110 you will also need six resistors (2) 2.2 ohm 1watt
(2) 1.5 ohm 1watt, (1) 3.3 ohm 1watt and (1) 1.8 ohm 1watt.
You can get replacemnet ICs and resistors at te following link with free instalation instructions. Here is the link.
Posted on Jul 17, 2008
All 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....
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.
Picture of a set that needs the fluid changed.
TV set after fluid change
You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull
Posted on Jan 13, 2011
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