Question about Toshiba 32HFX71 32" TV

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Try # 2... Green Fog

I tried entering a problem and halfway through my message the text disappeared....sorry if this gets reposted. Summary: Picture has "light green fog tint" more pronounced on dark scenes. Using yesterdays NASCAR broadcast on FOX I observed the following Grass: GREEN Red Flag Icon: RED Blue Graphics: BLUE Yellows and Oranges also appeared correct. I'm guessing that all 3 guns are functioning. I notice when watching BabyFirst TV that the logo flower has all the primary colours. The screen white is white. Black never seems black enough. In dark scenes ( inside parked cars, dark rooms for example) always appear greenish. To get the correct level of black (to my taste) The following properties are set. CONTRAST : 100 BIGHRNESS: 0 ( or a value very low... 5 - 16) SHARPNESS: Undeciided yet. COLOUR LEVEL: Varies, currently between 50 and 63 TINT: 0. Haven't explored yet. They colurs are still a bit off and dark, I know I can correct dark by increasing brightness at the risk of maing the fog situation worse. The fog I referr to acts the same as if you were to reduce your contrast... so that it starts smearing everything with grey....except it's green. TV source is mostly SAT RECEIVER via Component video. This renders SAT RECEIVER colour control inactive. Picture quality is the same via S-video connection. I can change SAT RECEIVER colour with RECEIVER controls when using S-video. Generally A green hue covers the screen while viewing dark scenes. I have the contrast cranked up so high to get a good white level and black level that I think this is why I'm seem flyback lines...diagonal lines (especially on fade to black scenes). I wish there was a DVD or some type of colour setup image so I could tume the picture and forget about my judgemental interpretation of what I'm seeing. I have not, as of yet checked the Colour balance while viewing a DVD or our Gamecube ( both which use COMPONNET VIDEO) I have yet to use the second COMPONENT VIDEO inputs set to verify it's not a input connector issue. I seem to recall the GAMECUBE exhibited the same problem, just thought it was the gamecube. I don't recall as I haven't had time to check whether the same condition appears on the VHS or DVD players. If not, it could point to a limitation of the SAT RECEIVER. If however the green tint is consistent across all sources, then I am infiact looking at a Set related problem. Thanks for the Read...

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Re: Try # 2... Green Fog

Well I used to do service work for Sharp and HP so I should be able to find this. I was hoping to hear that it was an adjustment and not a failing tube or something else. TV's aren't my bag, I know how to watch 'em and that's about it. Any thoughts on what to use as a source? Some kind of calibrated picture?

Posted on Mar 04, 2007

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Re: Try # 2... Green Fog

The green gun in your picture tube is set a little too high. If you are experienced in removing the back cover of TV's,etc., you may try to find the drive and/or bias controls either on the circuit board that plugs on to the neck of the picture tube or mounted on the main circuit board of your TV. These controls are usually labeled. If you can find them, locate the green bias or drive control and back it down a little while watching the picture through a mirror. A slight adjustment may correct your problem.tJIS IS CALLED GRAY SCALE ADJUSTMENT. BE CAREFUL THERE ARE SOME HIGH VOLTAGE CIRCUITS NEARBY. WORK WITH ONE HAND AND USE AN INSULATED TOOL TO MAKE ADJUSTMENTS I hope this may help you.AGAIN BE CAREFUL!! Stargazer

Posted on Mar 03, 2007

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