Question about Sony KP-51HW40 51" Rear Projection Television

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Blue bow on screen no sound

Tv works ,but as soon as you turn off and back on you get a blue bow tie.after turing itoff and on nothing

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The blue CRT (picture tube is bad) These TVs were a real problem. Picture tubes began failing in these sets within 2 years of use. Sony warranted some of these TVs for a short while but has since abandoned their customers so they could build defective LCD projectors which are now the subject of a class action lawsuit.

Kick it to the curb and start lookin' for a new one.

michtech

Posted on Feb 13, 2009

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I have this same problem with the PT51HX41E but in the convergence menu the green and red are allowed to move. but the blue on the right side of the screen is not allowed to move and it looks like its...


My first guess would be a bad convergence amplifier - this is common, although usually all three of the amplifiers in the integrated circuit die at the same time, which throws off at least two colors and creates a "bow-tie" effect. I surmise you have half of a bow-tie in blue only.

If you could look at the blue output waveforms with an oscilloscope, you would see right away if this is the problem (flat-line instead of sawtooth wave). It is possible that both of the blue convergence amplifiers are working, but one output is not getting to the blue deflection yoke.

Don't mess with the convergence anymore until you get this taken care of. Changing the convergence now will only make it harder to get it back to where it should be once the circuit is fixed.

Sep 22, 2010 | Panasonic PT-51HX41 51" Rear Projection...

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Picture on the screen looks like a bow-tie red, green, and blue are seperated on screen


magnetized tubs, check if you have any speaker nerby tv. to correct image is a degauss function tv menu

Dec 22, 2009 | Zenith R57W46 57" Rear Projection...

1 Answer

I have a hitachi 53sbx59b 53in tv


This is a very common failure on Projection sets. Its called a convergence problem.

You may have one or more of the following symptoms.
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • No Audio / No Video - Makes Chirping Sounds
You can see some examples and find a fix here...


http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Sep 27, 2009 | Hitachi 53SBX59B 53" Rear Projection...

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Mitsubishi VS-50501A convergence problem. The image looks like a bow tie and the convergence will not align. This TV only has manual convergence. I already replace the STK391-020 ICs, it has 3 of them....


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. 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, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith 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 - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV2_bing.gif 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 here
bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 15, 2009 | Mitsubishi VS-50501 50" Rear Projection...

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My picture turned blue after i unplugged the tv


did you ever fix the problem?
my tv went blue screen also
needed to charge the lamp so did but now can't get the new lamp to work

Jul 25, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Tv is messed up


I got a question.

Do you have any stereo speakers anywhere near your television?

This sounds like something a magnetic field could cause from speakers being too close to the tv.

If so try to relocate them and see if the problem goes away.

Jun 15, 2008 | Hitachi 57SWX20B 57" Rear Projection...

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Picture is suddenly "bowed" and the convergence is askewed at everypoint but center.


the problem is the EW cicuit of the deflection cicuit. this is a component level repair call a tech. the EW or East West correction is apart of the horizontal deflection. IC431 is the pin amp.

Feb 06, 2008 | Akai PT5598HD 55" Rear Projection...

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