Question about Toshiba 50H72 50" Rear Projection Television

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Diagonal distorted picture

My tv has a diagonally distorted picture - kind of like in old tv's when the horizontal or vertical hold didn't work.

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Re: Diagonal distorted picture

Convergance amp ic bad

Posted on Dec 14, 2007

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Most likely bulb is not in correctly or a issue with the optical light engine this set uses

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Distored picture

Well, if your horizontal is off frequency and you have diagonal lines then there's no need to look at the Horiz Output Transistor or the Vertical section. You will have to use your scope to check the oscillator freq. and go from there.

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Picture goes diagonal

U know how to solders?Ur convergence it dead,must replaced.Tries these websites for convergence kit.Tv repair,Tv repair kits.

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I have Diagonal lines moving across the screen.

The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony,Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix herebb0cf99.png

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This is common problem on this tv, picture tube is bad. Blue and green is more % bad.
Thank you

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Poor solder connections, resolder convergence ICs or you may beed to replace them.

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picture is ok /converg.-ok/;diagonal lines on screen; looks like waves.Appear on tv and video modes.I observed same problem on some another tv in my practic,but this case is worse.

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I called a repairman, from the store where we bought it.

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STK392-560 STKS convergence CHIPs Replace both of them.

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