Question about Toshiba 43H71 43" Rear Projection Television

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Pcture problem the blue bulb seems to have a problem i havd focused the green and the red but the blue one is still bad. if i take off the lense of the blue one the picture is better and with the lense on there is a green curve of color on the bottom of the screen. also the tuch focus has an error. the grren line looks fine and the red one too, but the blue is curved and it doesnt go across the whole screen during the touch focus.

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Replace both STK392-110 convergence IC's with Toshiba or
Sanyo brand...............no cheap junk !!.............T.

Posted on Aug 22, 2008

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After lamp replacement, why is picture still green?


it seems like the green was not defective before you replaced the green. remove the red =no change in the screen color, that could be bad. put back red, then remove blue=screen color changed, blue is good, hope you got the idea.

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Does it take some type of gel under the lights, the colors are a little blurry


i also have this tv. i removed backcleaned mirrior, back of screen and lenses VERY GOOD. Then turned on tv go to convergence, sepaerate cross hairs then adjust focus on lenses. Then lenses rotate maybe about a 1/3 turn total by hand. Grab ring that houses lenses and turn until cross hairs are as clear as possible. This can be done with out help by watching inside of screen. red and green are adjustable, the blue is adjustablealso but i couldnt find blue cross hairs, maybe by covering red and green lenses the blue will show on screen. anyway when done and cross hairs are clear,lenses, mirror and screen are clean, you can adjust covergence and get a very clear screencleaning will also brighten pic. Pete

Mar 27, 2010 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Picture is not focused, color is off. When we


this sounds like the convergence ic's need to be replaced that should fix the problem

Jan 25, 2010 | Hitachi 57F500 57" Rear Projection...

1 Answer

Need to clean lenses and do manual focus/alignment of guns on a VS-5055. How do I get access to them and adjust? Thank you.


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Sep 19, 2009 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Green & Blue Ghosting Convergance problem


Odds are real good that the cooling fluid in the green and blue picture tube assemblies has become contaminated. You can tell by looking down into the lenses with a flash light. Funny thing is the red never gets contaminated because whatever organism is causing the problem can't survive in red light. BTW this may still not solve all of your convergence problems but when the colors are so badly diffused the convergence sensors for flash focus can't lock onto the beam landing.

Jun 01, 2009 | Samsung HCL473W 47" Rear Projection...

1 Answer

Projection tv is Blurry and offset


You have a focus and screen control box it has 3 controls on top 3on bottom these are the controls for Red-Green-Blue screen drives and for focus to each tube. IT should have Focus /Screen on it.

Dec 19, 2008 | Philips 50P8341 50" Rear Projection...

1 Answer

Replaced red and green tubes


Good Day;

You may mixed the lenses. The lenses have an adjustment and there is a focus/screen block for focus adjustments.

Good Luck, big IRISH.

Sep 28, 2008 | Sony KP-57HW40 57" Rear Projection...

1 Answer

My hitachi 50EX16B is messed up


green is not adjustable only through the service menu. if the green yoke hasnt been turned then you most likely have a faulty capacitor or resistor in the green convergence circuits causeing the green projectors image to be skewed. without the service manual and some tv repair troubleshooting skills you will probaly need to call a tv tech

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4 Answers

Lamp issues


No its a tube and not a bulb. If thew line is green then theres an issue with the red and blue as the green is stationary on most sets unless thers a green centering ? Its a componet on the convergence board thats bad or going bad but if you replace any components on the board most likly your gonna need to do a convergence alighnment I would let a pro handle this repair unless your an experineced repair tech Good Luck

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