Question about Toshiba 42H81 42" Rear Projection Television

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Red line During touch focus, red line is stuck and the red color in the picture is off

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Re: red line

Need convergence IC's and probably several resistors that have changed value. Seek professional help, someone who uses ORIGINAL ic's, not generic or knock-offs

Posted on Jan 03, 2008

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Red Lines through picture when screen is dark, back ground has a red tint. On my 48 "Sony Rear Projection" TV

You can try adjusting the Red color output. (Very touchy adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small square black box with 6 screws on it. This is the focus block. (At least this is where most of them are located)

It sounds more like you may need less red in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.'

Go to an unused input where the screen should be dark. Barely turn the red down in a dark room so that the red spot is at the same level as the Blue and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur and the TV may detect a short and shut off.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful.

Apr 19, 2010 | Sony KP-48S75 48" Rear Projection...

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Hi, my tv shows a double image with red outline I pressed the Touch Focus and the red did not have a verticle was straight line, but the horizontal line was not straight, but came back with touch focus...

you have a convergence problem
it will require a couple new ics its best to replace as a pair stk392-110 although i recommed using the stk392-150 as a replacement and also there are some jumpers that should be resolderd on those boards to assure continued operation hope this helps you

Sep 11, 2009 | Toshiba 42H83 42" Rear Projection...

1 Answer

Pcture problem

Replace both STK392-110 convergence IC's with Toshiba or
Sanyo cheap junk !!.............T.

Aug 04, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Can not foucus the colors

What model set do you have ? Its probaly convergence ICs faulty.

Jan 07, 2008 | Projection Televisions

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Still green

go In service convergence mode and try to adjust red and green if you cant then it's convergance amp ic's
if you can adjust them so they align up try doing a touch fous after that,.

Dec 16, 2007 | Toshiba 42H81 42" Rear Projection...

1 Answer

Can not foucus the colors

Nov 26, 2007 | Toshiba 50HX81 50" Rear Projection...

2 Answers

TOUCH FOCUS ERROR on Projection Toshiba TV

My 57H81 won't converge, plus I get the "touch focus error" message. I could get manual convergence of blue, but not red. Plus, during touch focus the red would not move horizontally

Nov 25, 2007 | Toshiba 57H81 57" Rear Projection...

1 Answer

Toshiba 42 inch rear projection

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