Question about Samsung HCM422W 42" Rear Projection Television

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HCM 422 Hi Jaime: Thnaks v much for giving me a solution. So you think its the entire convergence board is the problem??? The website u provided shows a price of abt $178 for the board. I hope its v simple to install this board. Do I have to unscrew the back of the TV or is it a simple pop-out plate kinda thing to reach the internal circuitry? I'm I mentioned I am NOT a DIY person. Thks v much for your prompt and helpful inputs.

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Since you said that you are not a DIY person, I suggested to replace the entire assembly, but if you know how to de-solder and solder you can just replace the STK392-040 ICs and a few resistors to fix the convergence issue.
If you're planning to do it yourself, I would suggest to label every wire you disconnect from the TV; for example put # 1 on the wire and # 1 where you remove it from.
Let me know if you need further assistance.

Posted on Aug 28, 2008

  • Jaime Hernandez Aug 28, 2008

    Ask them what is the difference between the two board listed there.


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Mon image est en trois dimensions

Hi Franceg40,
The main reason of your problem is the convergence board gone bad, check first the bad solder joints in the board, you may replace the convergence IC and resistor around or the entire convergence board for your convenience.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Feb 15, 2011 | Sony Grand WEGA KDF-60WF655 60" Rear...

1 Answer

I have Sony KP-46WT500 Projection TV. For some time it appears convergence went bad. I see multiple images, especially at edges and corners. As many as 3 images Red, Blue and Green. I am an Electronics...

It would be great to assist you in Sony convergence issue.
As you said, for some time TV shows bad convergence in picture that shows its matter of lose/ dry solder joints in D board, specially on convergence out ICs pins that need to be re-solder.
There are 2 big black ICs mounted on aluminum heat sink on D Board of TV, below image shows D Board location in TV.
Resolder pins of these 2 ICs and also check any other dry/ cold solder joints in circuit board. I do not think of IC replacement as problem occurs some time.
Let me know if you have additional question.


Dec 20, 2009 | Sony KP-46WT500 46" Rear Projection...

2 Answers

Hi ! We just obtained an Akai Projection t.v.

U can't,it ur convergence it dead, must replaced parts.U know how to solders?Tries these websites,Tv repair kits for convergence board or parts.

Nov 14, 2009 | Akai PT4298HD Rear Projection Television

2 Answers

Hitachi 65F710 convergence problem

you have to unsolder the old one and put in the new one it should be located just forward of the tuner

Nov 20, 2008 | Toshiba 53H71 53 in. Rear Projection...

2 Answers


Sounds like a convergence circuit gone bad. If you can provide a model number we can be much more helpful to you.

Sep 12, 2008 | Televison & Video

1 Answer

Samsung Tantus HCM 22 convergence problem

Check this website to buy the entire convergence amplifier board. Replacing the entire boars is a DIY since there isn't any soldering involve only open back cover of the TV and unplug a few wires to remove the old board and install the new one. Keep in mind that this board could be used or reburbished.
Samsung no longer has the assembly.
If you need more info let me know.

Aug 28, 2008 | Samsung HCM422W 42" Rear Projection...

1 Answer

Convergence on kdp-65ws550

youre looking at about 300.00 for that board if its still available as the entire D board need to be replaced if you go that route. Go to this link as they can get you a prive on a new board or they also sell just the parts and provide free instructions on how to replace the Ics and resistors in the convergence section. heres the link, leave them an email with your model number and what your looking for.

May 26, 2008 | Sony Grand WEGA KDP-65WS550 65" Rear...

1 Answer

How to access convergence board on 60" Philips?

First thig you are going to need is the service manual, as this will have the disassembly instructions and the alighnment you will need to adjust after the board is repaired or replaced. there will be two IC's that should both be replaced at the same time. they will start with STK and will be soldered onto the printed circuit board and mounted up against a large metal heatsink.. These ICs can be replaced, but if you have no soldering skills or no experience working on Printed circuit boards, the entire board is available at Good Luck

Mar 28, 2007 | Philips 60PP9401 60" Rear Projection...

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