Question about Samsung HCN4226W 42" Rear Projection HDTV-Ready Television

Samsung Convergence Problem

I believe I have a convergence issue. My picture has a bowed effect with the colors not aligned. I replace the PCB-CG Module but no luck. I believe my next step will be to replace the 2 IC chips. How do you remove these from the board, or should I have a tech do it? Thanks

Pete Buotte Apr 21, 2007

What about the bowing, would that be another issue, or would it be the convergence as well?

Thanks!

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77 Answers

It requires some pretty good solder skills and there may be a couple of resistors that need to go also. Take that CG board out it probably doesn't need it and you will likely have to completly re-align the set after repairing it with the new CG in there, just the IC's and resistors usually require minimal alinment

Posted on Apr 21, 2007

Anonymous Apr 23, 2007

yep, almost always. if its all three colors bowed you will probably find a fusible resistor open.

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My rear projection television is showing a double picture with the blue out of allignment. It also shows a bow on the top and a bow on the bottom.

The tv have a problems known as a convergence problems,tv convergence board it is dead.Tv have R,G,B colors lines mis alignments,have colors pictures shadows or 3D pictures look alike?Yes.The tv convergence board it is dead.Must require replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv picture convergence problems.The tv shop,will cost u like $300-350 for parts and labors.

Apr 24, 2011 | Zenith IQC50H95W 50" Rear Projection...

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Help with RCA projection TV P46812BL (chasis ptk195AA)

You have probably blown one of the convergence ICs. Effectively the easiest thing to do is replacing the whole convergence board, so that no soldering is involved.

Here you can buy a replacement convergence board, just select your model.

Let me know if you need further help.

Sep 13, 2008 | RCA P52930BL 52" Rear Projection...

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Color convergence off and bowing effect on top and bottom of picture

Yes, if you have replaced the IC's correctly (and used the correct IC specifications) then the issue could be with faulty resistors and / or capacitors.

Jun 01, 2008 | Samsung PCL545R 54" Rear Projection...

1 Answer

How do i fix my samsung 1080i hdtv. It has a double picture and is red and blue, and also looks like a bow tie effect

The tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?The tv convergence board have dead 2 STK convergence ICS and some or all it resistors are dead too.These parts on the tv convergence board,must be replaced to solved pictures convergence problems.The shop,will cost u like $300-$350 for parts and labors.

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1 Answer

My Toshiba projection screen TV the picture is bowed and the colors don't line up

3d colors not lining up poblem dicates "convergence issues.. bowing piture may indicate complete faliure of convergence alignment cuircits... depending on model the most likely cause will be 2 micochips (ic's called stk<s)

Aug 23, 2010 | Toshiba Televison & Video

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Count the # of flashes...call Samsung tech support

Nov 10, 2009 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

Same problem as above, picture bowed top and bottom, convergence

Projection sets have two very common problems outlined below.

The first common problem is convergence

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. The TV can also shut down when the convergence starts to fail.

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, RCA and others.

You can more info and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*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

SOLUTION

You can see some more examples and find a fix using this link on Fixya

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

Jul 19, 2009 | RCA P52939 52" Rear Projection Television

2 Answers

RED CONVERGENCE SCREEN PATTERN BOWING AND CAN'T ADJUST

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 here

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

Jun 13, 2009 | Samsung HC-P4752W 47" Rear Projection...

2 Answers

Picture Problem , Sony Projection TV

Your TV most likely a convergence 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.

Here are some photos of convergence problems.

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.

SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

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1 Answer

Picture Bowed

Try replacing the convergence IC's w/Panasonic STK392-040 for durability,then perform servicer mode convergence alignment procedure.Last,check customer adjust conv. alignment.

Apr 15, 2007 | Samsung HCN5527W 55" Rear Projection...

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My rear projection television is showing a double picture with the blue out of allignment. It also shows a bow on the top and a bow on the bottom.

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HCN4226W 42" Rear Projection HDTV-Ready Television

My rear projection television is showing a double picture with the blue out of allignment. It also shows a bow on the top and a bow on the bottom.

Open Questions:

why does a samsung un46d6900wf screen comes up then shuts down, double blinks six times.?

CONVEGENCE STK 392

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