Question about Hitachi 51SWX20B 51" Rear Projection Television

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Pulsating Picture My 51swx20b is 3 years old. The picture is pulsating on the left and right of the screen. If you turn on the convergence screen, you can see the convergence lines moving in and out, sometimes slowly and other times rapidly. The colors are aligned on the grid. Any ideas? Thanks, Kevin

Posted by Kevin Heffelman on

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Anonymous

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Your set might have loose conections ,a few places to check is the horizontal driver transformer and the convergence IC's,they develop loose conections and need to be resoldered,if you are familiar with tv service and soldering is something you could do ,some conectors might get disconected when you flip the board,but if you are not too familiar I would suggest you call for assistance from a servicer.Besides the places I mentioned I am sure the set has other overheated places that need resoldered as well.Let Us know how it goes.

Posted on Oct 26, 2006

  • Anonymous Oct 26, 2006

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Solution:

Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence or magic focus section.

Try to adjust the convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from www.TvRepairKits.com. The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.
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Either the main smoothing capacitor or the voltage regulator are faulty. You may find that the power LED will stay on after pulsating for several minutes, at which time you can switch the TV on.
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I have the same set. I solved this by turning off the dynamic contrast or adjusting the contrast and brightness settings down.
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