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

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Bad picture the top and bottom of the picture bows in towards the center of screen

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  • Anonymous Oct 18, 2008

    picture bows in center like a "pincushion" screen on a computer monitor and convergence is of kind of twisted to one side.

  • wileyaz Oct 18, 2008

    I HAVE THE SAME PROBLEM AS THE GUESTS CONCERN AND HAVE TRIED TO ADJUST CONVERGENCE BUT THE LINES ARE TWISTED OR SLANTED TO ONE SIDE AND WILL NOT ALIGN ANY HELP WOULD BE GREAT AS I CAN NOT AFFORD TO BUY A NEW SET LIKE THIS ONE OR AN EQUIVALENT ONE THANKS.

  • payam4 Oct 22, 2008

    On mine, only the red color is bowed.

  • Anonymous Oct 27, 2008

    Similar to other 2 listed "bow" problems. Mine is both red and green, and bow inward from the top and bottom center.

  • cklmoeckly Oct 28, 2008

    The picture bows in on the top left corner and all along the bottom. When I try to adjust the convergence I am not able to. the + won't line up.

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Can anyone tell me how to fix this??

Posted on Nov 02, 2008

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  • Sony Master
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Are the convergence controls also out of adjustment? Please respond to this same post and I will help you. If you could post a picture of what the screen looks like that would even be better.

Posted on Aug 08, 2008

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2 Answers

I have the same problem with a 61uwx10b. I


the ics could have been defective, or maybe you missed a resistor or something. the ics could short out and cause the tv to totally shutdown if dead shorted, as some of these have no fuses. I would doublecheck all your solder connections and make sure nothing is shorted out and look for other bad resistors. here is my tutorial if this helps
http://www.fixya.com/support/r5001731-convergence_diagnosing_convergence
Let me know if I can be of further assistance.

Jun 13, 2010 | Hitachi 61UWX10B 61" Rear Projection...

1 Answer

Picture Bowed towards the center


It is a convergence problem, probably one of the convergence ICs has blown and must be replaced. Call the number in the last pages of your user manual to get repair service in your area.

Jul 25, 2008 | Mitsubishi WS-65413 65" Rear Projection...

1 Answer

Center bow on picture top and bottom with 1" black showing


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 06, 2010 | Toshiba TN55X81 55" Rear Projection...

1 Answer

PICTURE ON TV LOOKS BENT. ALL STRAIGHT LINE ARE CURVED


In order to provide a correct dianosis and cure, I will need to know the model number and in which direction the bow occurs. Does the curve occur from the top and bottom toward the center or from the sides toward the center? There are different circuits involved in these case.

Please update this and I'll provide a solution.

Thanks,
Dan

Nov 03, 2009 | JVC Televison & Video

1 Answer

I have a JVC 48' widescreen tv approx. 7 - 8 yrs old. the picture is now extremely bad all of the colors seem to be out of wack and the picture bows inward toward the middle at the top and bows inward...


There's a miror or one like this might have a ''aluminium sheet'' miror.
Open the upper back cover to see what going on there, pretty sure something run out of place...

Sep 08, 2009 | Televison & Video

1 Answer

Bowing of picture at top and bottom towards center.


Projection sets have two very common problems outlined below.

The first common problem is convergence

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. The TV can also shut down when the convergence starts to fail.

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,Mitsubishi,Zenith, RCA and others.


You can more info and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

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

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*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

bb0cf99.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya

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

Jul 12, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Projection T.V. Picture


Replace Both of your STK ICs convergence ICs STK392-110 use 150s Better ICs Call Mats 1-800-628-1118 Also RK42 RK46 RK48 RK50 RK54 RK58 RK60 will have to get back to you on resistor values

Jul 21, 2008 | Hitachi 60SX12B/13K 60" Rear Projection...

1 Answer

Red convergence is bad.


Hi, you need to change the convergence ICs , STKs: and some resistors,low values; , after changing them, you will have to go into the service mode, to do some adjustments.that's it.

Nov 27, 2007 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Bow like image


You likely have bad convergence output ic's type #STK392-570.  These can be purchased at UED 800-648-6657.  You will need to remove the board they are mounted on to be able to usolder the old ones and resolder the new ones.  These will be mounted on heat sinks.

Sep 08, 2007 | Mitsubishi WS-65819 TV

1 Answer

Picture Distortion


you have a convergence problem.. If you understand how this works then you can go into the set find the convergence ic's and replace them and sometimes you need to do some alighnment as well. Its always best though to let a service tech do a job like this as he will have all the proper equipment to adjust and troubleshoot the set Good luck

Mar 30, 2006 | Sony KP-53HS30 53" Rear Projection...

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