Question about Zenith IQC50H95W 50" Rear Projection Television

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Convergence Problem I have a Samsung HCM422W 42", The pefect focus does not work at all. I can manually correct the convergence but after turning the set off and back on the problem is back. For the most part the problem is with the red convergence and only on one side (the left). Some of the cross hatches are also rotated a bit, so those cannot be aligned using the manual mode. Any suggestions?

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  • Craig Wir Mar 23, 2008

    So much for a little off, the red convergence went bonkers and is now way off. No way to fix it with the manual mode. What do you think is wrong and can it be fixed within a reasonable amount. I have already spent about $350 a few years ago so something similiar.



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Perfect focus in these sets are dependant on factory or service mode calabration. once the unit is calabrated then those setings are stored to be the basis for perfect focus. The fact that you can manual converge the set is a good thing. probaly nothing phycially wrong with your set. However. what is needed is to get a qualified tech to look at your set and to calabrate the convergence.

Posted on Mar 04, 2008


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1 Answer

The picture color is replicating itself

need to replace convergence IC chips to correct this issue.

Dec 18, 2010 | Samsung HCM422W 42" Rear Projection...

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I have a 42 inch samsung hcm422w projetion tv and the blue convergence is f.u.b.a.r. the manual convergence setting does nothing, it moves the curser but will not adjust. any idea? help??

I am not sure about fubar, what you need most is convergence repair. Confirm fault with Convergence Galley. Non adjustment in convergence menu is confirmation of convergence failure. Also confirmed if Magic Focus will not complete the adjust cycle. If you want to use the TV again, get local service guy.

Ask for "How much to Repair" on-site and describe problem. If he offers to provide an estimate after sending a kid out for a service call charge, etc., call someone else. They are trying to Jack Fubar's bill to $300-$600.

Or you can attempt repair yourself. Buy ICs, get tools for the job, Rip TV apart and change. Be prepared to troubleshoot any existing secondary faults or problems you may cause.

Big Noise companies with impressive names sell useless STK ICs to unsuspecting consumers. If you happen to buy these ICs, you may end up scrapping your TV.

Many of the Help Me inquiries for convergence repair start with "I changed my STKs with honkin' new upgrades in a kit and TV is dead or worse than at the start of the repair." Please help.


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This is an indication that the STK is bad. The PC board should be marked to indicate which one if for the green.


Apr 13, 2009 | Samsung HCM422W 42" Rear Projection...

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I have a blurry screen and the top of it the picture is curved a bit. I was told to adjust the focus knob but I don't know where that is in the back of the TV. I took off the back and couldn't find it. I also tried to adjust the manual convergence and the red would not adjust only the blue would align. Any suggestions.

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you should be able to do that from the remote with the convergence.

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this is an idication that eather the convergence ic's or convergenc ic output resistor have blown

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Your need a PSU/Deflection board..or possibly convergence amps.................

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