Hitachi 57SWX20B 57" Rear Projection Television Logo
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Anonymous Posted on Feb 20, 2011

I have what appears to be shadowing of the words.. and picture.. blue wave across the top of picture..

1 Answer

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  • Expert 99 Answers
  • Posted on Feb 20, 2011
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Joined: Feb 11, 2011
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Your Convergence ICs are likely failing. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless. They will be right next to each other.

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