Question about JVC AV-56WP30 56" Rear Projection Television

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Blue horizontal line

I have developed a bowing blue horizontal line across the top of the picture. It is present all of the time and seems to be throwing the other colors off around it. Any help or info would be appreciated.

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Hi Brian,
Sounds as though you have a bad convergence chip ( there are two convergence chips on the board ). I suggest you change both and apply lots of heat silacon grease. Good Luck
Ed
NC Electronic
Mills, Wyoming

Posted on Jan 07, 2008

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Posted on Jan 02, 2017

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Samsung TSL2793HF - Slight Right Side Pincushion and Horz Line Bottom to Top Until the TV Warms up


Yes, this is rare but I have seen it before--not fixable if it is what I think it is----It is what is called a Dome effect---the shadow mask in the picture tube is actually contracting and or expanding depending on temperature---

Directly behind the phosphor coating (the stripes that you see on the screen) is a metal screen--the holes or perforations in it line up with the stripes on the phosphor screen.

Some masks either have a material or a defect causing the dome effect----Not likely to be anything else---a Pin amp problem will not usually act the way you describe but a shadow mask inside the picture tube will act exactly that way.

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The picture seems to be sliding down the screen of my Samsung HCN553W, I can still watch it except for the top 4-5 inches in the top left corner, it's black. Does anybody have any idea what it could be?


Ur tv it beginning to create and will develope a simtom call "Convergence alignment"These problems will delope in to the picture will have shades of colors like red or blue shadows,the picture bows in coners and colors will misaligns,the picture look like u watching a 3D movies,and the tv sometimes,just die and making chirpings sound.This problems very common in DLP tvs,it will develope just sonner or later that all.The covergence problems,the only way to fix are to take the tv aparts take out the Pc board call The Convergence board.Change the 2 STK convergence ICS,and some or all it supporting resitors and pico fuses.

May 06, 2010 | Samsung HCN553W 55" Rear Projection...

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Distorted Picture and High Pitch Squeal


You may have a convergence problem. Here are some of the most common symptoms and example photos.

  • 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.
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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.


2c07611.pngSolution


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Jan 31, 2009 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Horizontal lines across the top 3 inches of picture


Hi

what line started? from Left to right? or from top to bottom?

Thanks!

Nov 28, 2008 | Philips 32PT6441/37 32" TV

2 Answers

Blue horizontal and vertical lines


We have many problems with loose or poorly seated cables and connectors on these units. Pull the back and reseat all the internal cables, especially the LVDS cable to the LCD control bd. If this does not correct the problem the main cause is a bad LCD control bd. or possible a defective main bd.

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1 Answer

Samsung hlp 4663w picture is all horizontal lines


Bad color wheel...have it checked by a quaified tech.....
Must have lamp code number to get color wheel #.............T.

Dec 08, 2007 | Samsung HLP4663W 46" Rear Projection HDTV

1 Answer

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture


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

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1 Answer

Horiantal line near top of screen


Suspect the Light Engine part # 939P977020.

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