Question about Mitsubishi WS-65857 65" Rear Projection Television
The picture on the top and bottom of my Mitsubishi VS-50VF2 curves in. This happens most of the time in the last couple of years when I turn the TV on. Occasionally the picture fills the screen properly with the verticle and horizontal edges being straight. Other than the curving in from the top and bottom the picture quality is very good. The curving is faily minimal so it hasn't been much of a problem.
What is the problem and what can be done to solve the problem?
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Posted on Jan 02, 2017
You may have a convergence problem. Here are some of the most common symptoms and example photos.
Here is a quick test....
Using your original remote go-to the tv settings then goto the convergence section.
Try to adjust the red and then the blue 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.
You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.
Posted on Feb 05, 2009
The problem is the convergence circuit.
Mitsubishi used two different types of convergence IC's in this series. The first is a pair of STK-392-570, the second is a single STK393-110. The only way to fix the problem is to replace the appropriate IC'S. In some cases the problem may appear to be intermitent or loose solder connections. Save yourself the anguish and replace the IC'S.
Getting the PowerSupply/ Convergence board
out to do this is tricky and I recommend a professional to do it. Hidden screws on the front of the heat-sink make it difficult to take out and you can break the board easily trying to force it.
Posted on Jun 17, 2009
If colors are skewed and will not adjust in the customer menu---you have a CONVERGENCE circuit problem.
This model (KP-51WS500) uses two of the STK-392-560 convergence IC chips. I just got home from fixing a similar model with the same problem.
Parts cost on Ebay for the chips and such is going to be less than 30 dollars total. Shops are going to get 300 or more for this kind of repair---and some will not do it in your home---the repair takes about an hour--I have done hundreds of them here in people's homes.
If you have questions or need advice, reply to this posting and I will try to help.
If this told you something that helped you understand, rate this solution as I do this here for FREE.
Posted on Nov 15, 2009
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