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

3 Answers

Samsung 42 HCN4226wx

I recently changed the convergence board because the old one was faulty. Now everything works fine but have some weird vertical squiggly lines running through the screen. Can really only notice them on certain colours. I adjusted the manual convergence ( which were way out of focus) but still no difference. I also played with the other adjustments on the Tv. This is a learning thing for me so I probably missed something or touched the wrong thing. It was doing this right after I changed the convergence board. Any kind of assistance would be great.

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  • Mclure Jan 22, 2008

    Is there any tests I can do before requesting another board??? This is because I got the board from the states and I am from northern canada. If not I will request another board. Thanks.

  • Mclure Jan 23, 2008

    ctf1800 what I will do is send in my old convergence board to edmonton, ab and get it repaired if possible. This is because I could not intelligently explain to them the board is faulty and could not back it up with anything. I will let you know what happens, hopefully send it in this week. Thanks.

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Lets start withe the first guy, when you say you tryed some other adjustments does this mean you may have turned the screen sup to far for the CRT's this will produce a bad pix with what is called retrace lines, Best way to see if this happened is to get the set to a input that has no video, or in other words get the set to show you a black pix, now if the lines are there or a color is preasent the the screen control is not adjusted right. Now on some Samsungs there is a control box with six knobs on it mounted just in front of the CRT's (Or behind the speaker grill) On other Samsungs these are mounted directly on the CRT driver boards. Either way the setup is the same, from a black screen turn the control clockwise till the color or retrace line appears then turn it back tilll it goes away, do this to all three colors and see if your problem goes away, What this does is roughfly grayscales your tv

Posted on Feb 13, 2008

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Hi my names is David,Ive recently purchased one of these tvs and Im having some of the same problems,My tv is has vertical lines that go squigley in 6-8 inch sections top and bottom and sometimes the whole screen and sometimes it goes away completely and the picture looks great,Bought a monster power surge that supposed to clean and regulate the power but no help,also it does it in s video and componet modes as well as ant a and b so thinking it something in the tv.Can anyone give me some advice on what to do?

Posted on Feb 05, 2008

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I think you got a bad board, ask for an exchange.

Posted on Jan 22, 2008

  • Cary Farah
    Cary Farah Jan 23, 2008

    I wish there was, but no.

  • Cary Farah
    Cary Farah Jan 23, 2008

    ok please mark the solution as fixya

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Probably bad IC's (color or convergence amplifiers). Soldering and knowhow required.

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Ok first of all, the convergence board you are looking for is no longer available from Samsung, probably because of the large failure these boards are having. The only thing to do though would be to replace the convergence amp IC's on the convergence amp board. this will involve locating the convergence amp board, going to http://www.samsungparts.com, entering your model number, without the /xaa prefix. Locating the list of parts for this TV set, and getting the right convergence amp IC's for this TV set. The numbers for the convergence amps are STK-392-040. You will also need to get the service manual for this TV set to perform touchup convergence, as well as to realighn the magic focus into the memory of this TV set. If you have the ability to solder and unsolder, you should have no problem replacing thes convergence amp IC's. But i will have to say this, about 45% of these TV sets do still have a problem after the convergence IC's are replaced. this is usually due to the burnt ground return resustors on the convergence board, so be perpared to know how to read a scematic diagram in the service manual and to trouble shoot the board. There is no simple repair to this problem I'm afraid, with this Samsung TV set. But , if at any time, you feel lost in the repair of this set, do not continue, and call out a pro to assist you in the repair of this TV set. Good Luck with the repair of this TV set.

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Dead Samsung

I don't recommend working on the TV unless you have some experience and knowledge relating to the safety issues and electronic repair. Most rookies will not successfully complete the repair and probably do more harm than good.

Sometimes when the convergence chips fail, the TV senses the changed load condition and shuts down.

Unplugging the blue, red or green convergence connector on the convergence board removes the overload condition if the IC is shorted and allows the tv to run, with one color missing.

This is done with the tv unplugged. Then plugged in and turned on to see if it starts. Turn off immediately if you here it start.

Now you know if convergence failure caused the shutdown. You can repair the convergence circuit if that is the problem.

If this has no affect, then you could have a number of different faults in Vertical output, Power Supply or HV circuits that require the expertise of a qualified service person. This would be a bench repair in most shops.

If you live around Calgary, Alberta try me instead:

http://calgaryconvergencerepair.weebly.com/convergence-explanation.html

Or try to the find the repairperson part of this website (on the Homepage) and search postal code. Maybe you will be lucky and someone from your area is listed for Projection TV repair.

Most rookies doing this job will cause damage and not be successful. They will pay double for someone to fix their mess or end up scrapping the TV. It is not a simple task. It is more difficult than batteries on a remote.

Good Luck

easyab

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1 Answer

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Samsung parts for convergance problem
http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx
This convergence board works with the following Samsung television models: HCM4215W, HCN529WX, HCN559WX/XAA, PCN5425R, HCN4226WX, HCN529WX/XA

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Having same problem

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Cant locate - 00142

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Samsung parts for convergance problem
http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx
This convergence board works with the following Samsung television models: HCM4215W, HCN529WX, HCN559WX/XAA, PCN5425R, HCN4226WX, HCN529WX/XA

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
http://www.hdtvoice.com/voice/showthread.php?t=28929

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2 Answers

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Hi, Yes! the convergance board can stop the unit from coming On. No need to change the board, just change the ICs. This is what it looks like,you will have to remove the board from the unit take note of the wires before removing them, -794a500.jpg

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· Samsung parts for convergance problem
· http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx

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