Question about Hitachi 57SWX20B 57" Rear Projection Television
I am being offered a 53" Hitachi TV but the picture is not aligned in that it has several (3 I think) overlapping pictures. I believe the problem is something called a "convergence circuit". What am I looking at as far as repair cost/level of effort...I could do the repair myself if the parts were available possibly.
Your TV most likely has one or more possible problems.
Problem #1: Convergence Chip Failure ( common problem )
Here are some of the most common symptoms and example photos of a convergence problem
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.Convergence of Picture - 2c07611.png/>Solution #1
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 note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.
Problem #2 CRT Fluid is Cloudy
Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.
Picture of a set thaConvergence of Picture - 578ba6c.jpg fluid changed.
TV set after fluid change
What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.
Posted on May 07, 2009
Convergence problems are very common with projection type televisions.As a shop owner/operator I fix convergence problems on a daily baisis and depending on your electronics skill it is a pretty involved desoldering and soldering job.You could end up with a nice set that can last you a few years problem free for any where between $185.00 and $275.00.(If it is done right)You can try it yourself and spend about $75.00 in parts.Call around ant let the shop know that you need Stk392-120 and resistors installed into your set.Find out what it would cost to do just that and go from there.If you were to ask me that question the answer would be $225.00 parts and labor in shop, and $275.00 in home.Hope this information helps and please rate my information.
Posted on Jan 30, 2009
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Posted on Jan 02, 2017
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