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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The TV has a problem with the convergence? how much will this cost me to fix?

Call around all tv shops to get the best prices.Tell them u are 100% sure ur tv have convergence board problems,no examine and problems estamate require,just give u the final priced to fixed the tv convergence board.The prices awhile back $300-350 for complete tv convergence board fixed plus parts too.

Jan 05, 2011 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

JVC AV-48WP30 Convergence Problem

If you know how to solder, I would suggest to just replace the STK ICs and some of the low value resistors. If you do not how to solder replacing the entire board is the way to to get the TV fix. You might still need to adjust the convergence after the board replacement.
Let me know if you need further assistance.

Jul 22, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

The colors are un balance the red blue and green are not aligned how and the magic focus is not working how can i get that fix with out the expensive cost

Searches in ur telephone yellow pages call all the big screen tvs shops around tell them u are 100% sure ur tv have a CONVERGENCE PROBLEMS,ask for total cost for parts and labors the tv covergence board repair price?The price awhile back to fix convergence board problems for the DLP TVS was $300-350 for parts and labors.U know basic's electronics and soldering and have all the tools.U can tries Websites like, to buy the convergence kit to repair it ur self.The convergence board require changing 2 STK convergence ICS some or all it resistors to solved the Convergence problems.

Jul 01, 2010 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

How do I fix a converence problem?


First try using Autofocus. If there is a convergence problem this won't fix the problem.

Try using the convergence alignment procedure from service manual.

Here the procedure that works on most Hitachi rear projection.

Here the grid with convergence problem


If the procedure does not work, then the two STK392-110 on convergence board must be replaced.

Before replacing the ICs you can test the pico fuses located on convergence boards. Simply read ohms to test if they have continuity.

Better also testing components on convergence board like resistors located at the base of STKs.

After removing the old STK, the new ones must be re-soldered using cooling paste.

Price for single IC can is about $8/$20. I think
STK392-110 on this model can be better replaced with STK392-150. I suggest contacting the seller on this.

The service manual is available here.

Jan 12, 2010 | Hitachi 50SBX78B 50" Rear Projection...

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

Good Day, s_d_duncan;

The board for this 2001 Model is no longer available. Now, if you can solder, you can repair yourself. The parts you will need are two STK 392-570 (HIC), convergence IC's, part number 270P150010.

If you can't replace yourself, please call an authorized service center to give an estimate....

Good Luck, big IRISH.

Aug 03, 2008 | Mitsubishi WT-46809 46" 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

Auto convergence

Bull!!!!!!!!! i dont think he knows what hes doing....
you can send the board into have them check it out, it's the board with big black iC stk392-XXX send that one in, you convergence is done thru the menu system.

Feb 15, 2008 | Philips 55PW9363 55" Rear Projection...

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