Question about Samsung HCN653W 65" Rear Projection Television

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Descending curved line on screen

There is a curved line that falls from the top of the screen & takes up about 1/4 of the screen. There is an appearance of blue letters and numbers underneath any TV text (as if those blue characters are shadowing the actual screen text). When I use my DVD/VCR combo & select a channel that I do not have access to, the entire screen is naturally blue but the area above the curved line is shaded in black. Due to this malfunction, obviously the picture quality has become a bit distorted. I already tried perfect focus & I'm not too proficient in working with the convergence feature. What can I do to correct this problem? Is it a matter of replacing a bulb? Is there a solution to this problem? Please help. Thanks in advance.

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Re: descending curved line on screen

If the tv has a portal on the side open it up and make sure the screen is not out of it's track, don't set anything on top of the set it could make it happen also

Posted on Apr 30, 2007

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If the entire screen is curved, and it is not taking the whole screen, then you have a vertical deflection problem.

If the colors are double and do not match, with lines of different colors around pictures , then you have a convergence problem, often caused by a faulty convergence board.

The curving effect can be a side effect of bad convergence, or you may have both problems at once.

Unless you are a TV repairer yourself, better calling technical support. Usually you can ring the number listed on the owner manual.

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You will need to replace your two convergence I.C.s.They are two large IC mounted on a large aluminum heat sink.Replace both,look for any burned resistors near them,replace those if needed,and readjust your convergence. Good Luck

Let me know if you need any further help

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1 Answer

Hitachi 46F500 and there is a blue curved bar

Your TV most likely has a Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • 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.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site They have put together convergence repair kits for most models.

The kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, etc. Everything you will need to do the repair yourself.

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1 Answer

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hello sorry but it sounds like the chip have gone again when you replace these chips you might have to change the resistors and the 2 capacitors as well


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1 Answer

Picture in 3d without the 3d glasses

Replace 2 convergence chips, will start with stk ###-###

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1 Answer

Green cruve line

Good Day;
Suspect Convergence IC's STK4274, part Number 2003191. Replace all three IK04(red), IK05(green), IK06(blue).
Good Luck, big IRISH.

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Check the resistors right next to the Convergence ICs often 1 or 2 of them go oen when the ICs fail.

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1 Answer

Screen is curved inward on all 4 sides and there is a red, and a blue line that is curved at the top of the screen

This is a convergence problem.. possible deflection problem... you might need a tech to look at it...

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1 Answer

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

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