Question about Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television

4 Answers

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

While I was watching TV, the picture suddenly went bad and now looks like this: - There are horizontal lines starting from the corners that bow inward a couple inches. - All the images seem to ghost parallel to these bowed lines. - The colors are off and I am seeing a lot of pink, green, and purple. - The right and left edges look fairly normal. The picture gets worse the closer you get to the center. Starting from the center, the picture gets worse the higher or lower you look. - The audio is fine. I have tried putting in a DVD and it looks the same, so I know the problem is not my input signal. Is there anything at all that I can do to fix this? Thanks for any help you might be able to offer.

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  • dscbubba Feb 18, 2008

    my red deflection is bowed curved from right top corner toward left side and then from left center toward right bottom. corner.

  • Anonymous May 06, 2008

    exactly the same problem, nothing different

  • ccarrillo197 May 19, 2009

    I have a 3 year old 52"rca hdtv and all of a sudden started a 3D fuzzy, ghostly image.model ITC222A

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Everybody here seems to have basically the same problem so I will write a general fix for these Samsungs. First what you got is known as Convergence failure, A Ic or resistor, fuse or some other component has failed in the convergence circuit. So finding the service menu and trying to align the colors or spinning magnets on the CRT’s or a real bad idea of tipping a CRT or mirror would be the equitant of ripping the transmission out of your car because it had a flat tire. When the convergence fails no adjustment will bring it back, and if you do one of these stupid things then you have two problems. Now most of these Samsungs have an easily replicable board that all the convergence amplifiers are on. This can be found by removing the back and seeing if there is a board about 9 X 5 inches big and mounted to the CRT mounts, there will be 5 connector to this board. Now if your set does not have this board and instead has the two convergence Ic’s (these are about the size of a playing card and have the numbers STK392-040 on them) mount down on a board below and to the right ( this is known as the deflection board) this repair will not work for you. Instead you will need to component level repair the convergence circuit. But if you do have this separate convergence board the repair is fairly straight forward. Go to www.vancebaldwin.com or some other supplier and order BP95-00142E this is the convergence board. This board has been crossed several times through the years but this is the current version. Now once you get this board simply replace it making sure to get al the connector back in there original spot. The fire up the set and run Flash focus and for about 95% this will fix the set

Posted on Feb 13, 2008

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You needto replace the deflection/convergence board this is a common fault with this model of samsung the board is $180.00,after replacement you align the convergence .enter the service mode,mute-1-8-3 press enter to save your settings.

Posted on Aug 25, 2007

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I have same problem. Call Samsung they fix with remote and chrge me $100. After 2 months hapen again. I call them and ask how to fix this problem. They sad that i need code to fix it and code they don't give to nobody.So i have to pay again to be fixed.

Posted on May 20, 2007

This is a convergence issue, where you have to replace a few circuits on a board inside the tv.

Posted on Apr 05, 2007

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Posted on Jan 02, 2017

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My philips 240b powervision tv, about 10 years old, while watching, all of a sudden the screen video turned into slanting horizontal whilte lines. the input is from setup box. I guess it happened when i...


Slanting horizontal lines indicate that the horizontal hold is out of adjustment. As the components age they change values and don't have the same effect on the circuit. some units have a horizontal hold adjustment pot on the back that can be adjusted to bring the horizontal back to the middle. If the adjustment pot is not on the back the only way to bring the horizontal hold back is on the inside of the unit and this is not a safe proceedure. If the picture was really good before it went bad then it might be worth the cost of repair. If the picture was getting weak (light colors, washed out look) then the repairs are not cost effective (not worth the money to have the unit repaired) There are some tv repair people that work quite a bit cheaper than others. It would be worth a few phone calls to get an estimate and make an informed purchasing decision.

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Solution:

Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

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

Try to adjust the 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.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from www.TvRepairKits.com. The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.

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


The convergence ICs probably have a cracked solder joint on the foil side of the circuit board. Re-flowing the the solder would help. I will always replace the convergence ICs when doing this job. The labor remains the same and you will have to pay a few extra bucks for the parts. To fix this yourself, you will need to be able to identify the two convergence ICs, have a basic knowledge of electronics and be able to use a soldering iron. You will also have to do an alignment through the service menu.

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