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My mitsubishi medallion hs 1080 series model ws 55819 color convergence can no longer be corrected for a clear picture in the menu manually or by restoring factory settings how can i fix the problem
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Your Convergence ICs have failed. 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.
There is no "reset" as the set has in the customer and tech menus ways to attempt to manually adjust this.
under convergence in the customer menu select advanced and follow the instructions on the screen.
If Red or Blue or Green are skewed and will not adjust it means one of the two STK-394-250 CONVERGENCE chips this set uses is bad.
Depending on where you buy them they will range in price from about 12 dollars each to nearly 35 dollars each.
Let me know what you find; this may or may not be a do it yourself repair as some real expertise is required to correctly get at and replace the chips.
Replace the two Convergence amp ICs they are both STK392-570 Ics you can get replacements at the following link with free instructions on how to remove the old and replace the new ones. http://servicemanuals.vstore.ca/
Sounds like a pincushion problem. You can obtain the service manual and free diagnostic upport at the following link. Hope this helps. http://servicemanuals.vstore.ca/
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