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The image on the left and right side of the CRT is bending inward (arching) about an inch in the center looking like this ) ( Sometimes it scrambles and then the image is all distorted. Is it the tube or some kind of horizontal adjustment?

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  • jsvidpro Jul 28, 2009

    its a Sony PVM 14M4U with the SDI card option. Monitor looks good except for this issue. The monitor was made in 98

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It is PIN OUT failure problem.
Pin Out section would be located near horizontal section circuit.
TV CRT is just fine.
Let me know model and brand of TV to find out its schematics (if I have it) for more technical info.
Thanks.

Posted on Jul 28, 2009

  • Shahid Electronics
    Shahid Electronics Jul 28, 2009

    its a Sony PVM 14M4U with the SDI card option. Monitor looks good except for this issue. The monitor was made in 98
    ==================================================================

    It is Sony professional series monitor and should be fixed by qualified TV tech.


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I Have a major convergence problem. It is a 55 inch Toshiba ColorStream Projection TV(tp55h95). It was fine until we moved it into the other room, and now it's like the color is bending at both sides of...


Color arching.... Ahhh Yeah they eventually do that after a few years. Good news is all you need is a screw driver and some of your time and patience.

The color gun is a small box with 3 screws on it. (Blue, Red and Green. Turning the screws (Slightly) on the gun will get rid of the color arching. I had blue arching on a sony 65" Rear projection a year later it was red arching if you leave it long enough it will be arching and in and out flashing of solid color. Whole mind trip you don't want to venture on.......

The box on my sony was in the very front of the tv. I removed the front speaker panels and accessed it very easily. The hardest part is getting the front panel off. Yours may be in the back.

Best regards and Semper Fi...

Aug 06, 2010 | Toshiba TP55H95 55" Rear Projection...

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My lg 14 inch crt desktop monitor pictue become


The CRT has screen adjustments, there is a screen adjustment button on the monitor that will allow you to adjust the width of the image as well as the height etc.

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TV picture distorted, bending in from the sides


main board is cold solder. resolder main board.

May 31, 2009 | Televison & Video

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Picture is distorted appears to bend inwards


I am assuming you are talking about the horizontal, if that is the case and the picture bends in from the sides it is likely there is an electrolytic capacitor dry or leaky, usually easy to recognise, look at the top of all the caps around the horizontal section and see if you can find one with a bulge at the top, replace it, look around where the scan coils are plugged into the main board and toward the horizontal output stage area, there are other things that can cause the same symptom however, I have found that to be the main cause. It is worth looking at the primary power supply stage especially the mains cap ( the largest capacitor there, usually 250v or higher,) remove it,( oh a word of warning- discharge it first, just in case) look at the bottom and look for leaks. if you have a cap tester, it will save time, if you can use and own a oscilloscope, look for ripples in the mains...hope that helps Phil

May 18, 2009 | Samsung Televison & Video

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Distorted picture on my 32" Proscan TV...(about 15 years old)


The RCA GE sets have a problem with bad solder connections in the tuner unit which also causes numerous symptoms including poor regulation, no vertical deflection, low audio or dead set.

Pulling in from the sides is either poor regulation or a bad eeprom/solder join issue

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2 Answers

Color distortion and arched picture


Your TV most likely has one of two possible problems.

Problem #1: 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.
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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 #1

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 note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

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TV set after fluid change

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Oct 31, 2008 | Sony KP-51WS510 51" Rear Projection...

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PANASONIC 32" CT-27SL14 model


This is a problem with the pincushion and convergence circuits. Are you planning on repairing this yourself? If so, I'll look up the circuit designations and parts. If not, expect a parts cost in the $15 range plus the local labor rate.

Dan

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you have defective horizontal linearity! replace the capacitor at the hot side mostly 160uf 180V or 160uf 160V.

Oct 02, 2007 | Recoton Advent Advent Q2035A 20" TV

1 Answer

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Hello HollyJ, If possible can you post a picture of the problem, It would help in determining if this is a convergence problem or a pincushion circuit problem. You description while good is a little to general to many possible issues. This sounds like a defection issue but I would not be able to tell unitl I see a picture of the screen, take the picture with a digital camera and the post it to the page using the add image link on the right side of the dialog box. Thank you, Shuttle83,

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1 Answer

Hitachi Standard T.V.


Some of the problem could be a weak or damaged picture tube - especially if it encountered rough handling in the move. Other possibilities are bad capacitors in the power supply and deflection circuits which are common with this aged set. No adjustments come to mind that could permanently fix these symptoms.

Feb 11, 2007 | Hitachi 27UX01B 27" TV

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