Question about Samsung HCM422W 42" Rear Projection Television

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Convergence problem? In reading someone elses post it sounds like I need to replace either the STKs or the Sub Assembly board. I appear to have a convergence problem with the TV all the tubes have been replaced in the last 18 months, so I would figure it is a tube that is out. I just can get the colors to line up. Auto focus didn;t work either. Someone had mentioned to also check the low value / fuse resistors found near the STKs area. This is all chinese to me as I donlt know what any of those things are. Is there a way to get the part numbers of what I need and then have someone talk me through it? I have called around to repair people in my area and they sat it could cost over $500, however from what I see online I could buy parts for less than $200, I just don't know what to buy or how to go about installing them.

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  • blowe0072003 Nov 05, 2008

    Thanks man, I'll try that out.

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It sounds more like you need a new convergence board which is about 88.00.its not that hard to install and should be easy to order. all you have to do is look up the part number of your tv and go from there

Posted on Nov 05, 2008

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2 Answers

Convergence


After replacing the stks you need to perform convergence adjusment procedure.
If Stk keeps burning out then replace convergence board.

Sep 03, 2008 | Sony KP-46WT500 46" Rear Projection...

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I have a HCL473W with a 'concave' screen effect on 2 colors??


You don't need to replace the whole board, regardless of which board it may be mounted on. The STK IC convergence chips alone are all that need to be replaced. You can order them from a number of different online sites. You can try Alibaba.com. If you have any more questions, feel free to ask!

Nov 08, 2009 | Samsung HCL473W 47" Rear Projection...

1 Answer

Convergence problem, wavey at bottom some color distortion


Common problem on rear projection TVs. Either replace the convergence correction board or repair it. Usually a job for a technician or at least someone familiar with electronics. The fix is to replace the STKs and probably a couple of resistors. Can provide more info if needed.

May 11, 2009 | Philips 60P8342 60" Rear Projection...

1 Answer

Toshiba 42wh46p convergence problem


Yes Replace Both STKs also CK all low ohm resistors.

Feb 15, 2009 | Toshiba 50H82 50" Rear Projection...

1 Answer

Convergence...again


Please read my solutions for Tosh "H" line convergence issues.
Check fuses F850,F851,etc.......use STK394-160E upgrade
IC's.....save $.....Use Hitachi kit # X 480293.............Also,
solder wire jumpers on signal board........................T.

Apr 16, 2008 | Toshiba 50H82 50" Rear Projection...

1 Answer

Convergence problem suspect on sam hcm422w


Check this link for the parts: http://www.electronic-repair-kits.com/STK392-040.htm
If you DIY, I would suggest to check the low value/fuse resistors found near the STKs area.
Good Luck.

Mar 01, 2008 | Samsung HCM422W 42" Rear Projection...

1 Answer

Tv wouldn't turn on, unplugged convergence board, turned on, replaced STKs, still have convergence problem


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

bb0cf99.pngYou 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

Feb 07, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Hitachi 53uwx10b template


Hi, first what exactly are you looking for? the convergence board of the STKs number? If you have convergence problem, you will need to change the STKs for sure and check the resistence to the STKs and generally all of them have same low value. check it out and replace the faulty onces. switch on and adjust convergence and you have a good working picture on the screen. Visit www.fixurtvs.com for more FAQs.

Jan 11, 2008 | Hitachi Televison & Video

1 Answer

No picture, but red light on front comes on


If one your convergence IC's is bad then you will still see a picture but the colors will not line up, especially around the edges. I have never seen a Toshiba projection set completely lose the picture because of a defective convergence IC. If your vertical output IC has failed or cracked loose then that is exactly what you will see - no picture! The vertical output IC is usually on the same board as the convergence outputs which explains why it worked last time, even if the tech was not 100 percent accurate in knowing exactly what was wrong - he just changed everything. Resolder that vertical output IC and make sure it is getting power. If you still have no picture after that then have a qualified tech look at the set.

Jul 12, 2007 | Toshiba 46H84 46" Rear Projection...

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