Question about Hitachi 50UX57B 50" Rear Projection Television

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Samsung rear projection 42" green curves causing distortion just started

Mostly green curves starting at the top are blurring the TV, the picture stills is there but is blurred by lines curving down in the middle of the screen. The TV is about 6-7 years old. It has not been moved around or bumped

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Re: samsung rear projection 42" green curves causing...


Posted on Dec 05, 2007

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Color blends together. Picture has a curve on top of 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,Pioneer 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

Apr 16, 2010 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Distorted picture

You have a convergence problem.On this model you can change the convergence amp board which has the convergence IC's on it making it an easy repair.

Oct 06, 2007 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

The picture is distorted, the colors are all messed up mostly red purple green, It has curved lines on the screen.

Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.

The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs. To get fixed either call in a local TV repair company or goto sites such as Tv Repair Kits to get a repair kit with instructions. Here is there link.

They have put together complete kits for most models that include the parts, step by step photo instructions, repair assistance, etc.

Jan 18, 2010 | Zenith R50W46 50" Rear Projection...

2 Answers

I have a samsung 42 picture lines top and bottom of screen

DAve1645 is correct!

This is a common problem. Its called a convergence failure.

Problem #1) Convergence


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted

You can see some examples here...


Nov 28, 2009 | Samsung HCM4215W 42" Rear Projection...

2 Answers

I have a Samsung rear projection TV, not sure what model number or anything, it is about a 42 inch and about 6 years old now. The problem first started several months ago, basically when the TV was turned...

sounds like the convergence chip. i think you can get a kit from not sure how much it would be to have fixed. But if your good with a soldering iron i think their kits come with instructions as well.

May 18, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

The screen has a wave across it you can see two of everything.

The convergence is out . There are big ICs in the tv that go bad or get bad solder connections, that control each CRT to focus the picture one on top of the other. DO NOT move or try to adjust lens. The fluid is a coolant like in your car to keep the tubes cool.

Nov 25, 2008 | Samsung HCM4216W 42" Rear Projection...

1 Answer


You have a convergence problem. Components are shorted out and must be replaced. Unless you're a technician, there's really nothing you can do at this point.


Feb 03, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Bluring at the top section of the TV
Sony Convergence

Nov 11, 2007 | JVC AV-56WP30 56" Rear Projection...

1 Answer

3 curved lines top & bottom/blurred picture

This indicates a convergence problem..convergence power supply probally.. however ive seen 2 other cuicits cause this ..

Sep 24, 2007 | RCA HD52W59 HDTV Projection Television

1 Answer

Picture is Distorted, red/green/blue curves

you have bad convergenze this fault is common and need qualified person to change the STK ic's call repair man please don't forget to do excelent rate cause i here to help you regards

May 06, 2007 | Sony KP-51WS500 51" Rear Projection...

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