Convergence problem? I have a HCN4426W Samsung projection tv and recently the red tube picture has been arcing downward on the left and right sides of the screen. I'm not really sure how to describe it but the red image is distored, arcing downward, and kind of twitches. Using the autofocus won't correct the problem. Is this a convergence issue, would replacing the convergence board solve the issue? I was looking at buying this board to replace the current one: ( http://www.samsungparts.com/part_detail.asp?oldpart=BP95%2D00146C&catalog%5Fname=Parts+and+Accessories&category%5Fname=&product%5Fid=BP95%2D00415B&search%5Fmodel=HCN4226W ) Thanks for the feedback.

3 more comments
doiturself Dec 23, 2007

I have the same problem on the same set. Is there a place where I can look up instructions on how to change the convergence board myself?

Thank You.
gunta99 Mar 31, 2008

Hi i have a problem with the focus and convergence. auto focus will not correct as well as manual adjusting on the red color please help me i am not very familiar with rear projection screen, i need to know is the problem with the crt or with convergence board. what do you advice me to do please reply thanks Dennis.
Anonymous Apr 08, 2008

I also have the same problem few days ago that the blue image cannot be focused. I will try to buy the board and see what happen.
Anonymous May 05, 2008

The top 25% and the bottom 10% of the screen turns to yellow with an arch. Therefore, only the middle of the screen with an oval shape has somewhat the correct colors and it's "framed" with this yellow hue. Also, I notice the image of the yellow regions repeats itself towards the middle of the screen in blue. Unplugged the tv for couple hours, replugged and turned on tv. The screen first look cured but the discoloration appeared again in couple of minutes.
Anonymous May 07, 2008

I have a HCN4426W Samsung projection tv and recently the red tube picture has been arcing downward on the left and right sides of the screen.

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stillthe12c

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Gonvergence Board for HCN4426W model is BP95-00142E

Posted on May 08, 2008

Bill Heronemus

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That board, P/N Bp94-00155a should fix the problem and be fairly easy to replace. Make sure you unplug the TV before starting the repair though. Duh!

Posted on Mar 12, 2007

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1answer

Left side of sreen is blurry/halo effect. Right side is normal. Magic focus stops when it gets to green and flashes green number 3 on bottom left of screen.

All projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

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.
TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some pics of convergence problems.

Common 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.

TV set after fluid change

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

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Jan 08, 2011 • Hitachi 51F500 51" Rear Projection...

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I have a Philips 51PW9303 Rear Projection TV that had blue shadows around the sides of the screen and now has a green and red bowed line at bottom. Does I need a convergence board to solve this?

If the following doesn't work the tubes could be at the end of life:
Adjusting convergence:
Note: For best results, the Projection TV needs to be turned on for 15 minutes or longer before adjusting the picture tubes (convergence).

To adjust the convergence of the picture tubes:

Press the 'MENU/SELECT' button on the remote.
Press CURSOR RIGHT to enter the PICTURE menu.
Use CURSOR DOWN and RIGHT to select and enter MANUAL CONVERGE.
Press CURSOR RIGHT to select CONVERGE RED or press CURSOR RIGHT and DOWN to select CONVERGE BLUE.
A crosshair will be shown on the screen. If there is any red or blue fringe around the crosshair, use CURSOR RIGHT, LEFT, UP, DOWN to try and merge the fringe colors with the crosshair.
Press the 'MENU/SELECT' button to return to MANUAL CONVERGE menu.
Press the 'EXIT' button to exit the menu.

If you are satisfied with the convergence you may stop now. Otherwise, you can continue and adjust the convergence more using mult ipoint convergence.
To Adjust multipoint convergence:

Press the 'MENU/SELECT' button on the remote.
Use CURSOR RIGHT to enter the PICTURE menu.
Use CURSOR DOWN and RIGHT on the cursor ring to select and enter MANUAL CONVERGE.
Press CURSOR RIGHT and DOWN on the cursor ring to select MULTIPOINT RED or MULTIPOINT BLUE.
A grid of crosshairs will appear on the screen. If there is any red or blue fringe around any of them, press CURSOR RIGHT to enter NAVIGATE mode.
Use CURSOR RIGHT, LEFT, UP, and DOWN to move to a crosshair that has a color outline.
Press the 'EXIT' button to enter ADJUST mode.
Use CURSOR RIGHT, LEFT, UP, and DOWN to merge the color with the crosshair.
Press the 'STATUS/EXIT' button to return to NAVIGATE mode. Repeat as necessary.
Press the 'MENU' button to return to the MANUAL CONVERGE menu.
Press CURSOR DOWN until SAVE MULTIPOINT is selected.
Press CURSOR RIGHT to save the multipoint settings.
Press the 'EXIT' button to exit the menu.

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Apr 03, 2010 • Philips 51PW9303 51" Rear Projection...

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Red and green arcs, 3-D effect

Convergence is dead.Know how to solders?Replaced 2 Convergence ICS and all it resistors.Tries Tv repair World.com,Tvrepairkits.com for the convergence kit.The shop will cost u $300 for parts and labors.

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Jan 21, 2010 • Samsung HC-P4752W 47" Rear Projection...

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KP-57HW40 rear projection TV colors out of alignment and warped

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. 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, Zenith, and others. You can get a convergenece repair kit wiith 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 - makes a chirping sound.

Problem #2

Another common problem is dull or washed out video.
Your TV 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

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Jan 04, 2010 • Sony KP-57HW40 57" Rear Projection...

1helpful

1answer

Blue arc and ghosting across middle part of screen.

Replace Both of your convergence ICs they are big Black ICs will have STK on them! Use STK392-150s or the 180s Better ICs Call Mats Electronics 1-800-628-1118

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Samsung HCN4727W Rear Projection TV, green screen, audio works

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 more information and a DIY convergenece repair kit with instructions from the link 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 using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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The convergence anp ICs are usually what go bad in that unit. They are two ICs both are STK392-040 and they are at board location ICZ103 and IZC103 on the Sub Board attached to large heat sinks. You can get replacements with free installation instructions and free on line tech support at the following link.
http://servicemanuals.vstore.ca/
let me know if you need further assistance.

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get a different tech from a different store to come out, needs to replace convergence ic's good luck
please mark the post with a fixya

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convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
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http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

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Convergence issues?

most likely the convergence board.
Ordered complete convergence board, ask samsung for part number Convergence AMP PCB $108.44, from www.samsungparts.com
or could send it in to ptscorp.com for repair.

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