Question about Sony KP-57WS500 57" Rear Projection Television
Your TV most likely has one of two 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.
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 that needs the 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 Feb 22, 2009
You need change STK392-560(can use STK392-570)
I guess it happend when holding bolts weaken to radiator.(Check other STK on next radiator)
You have to change STK on right radiator.
Disconnect small connectors. You can l leave Hi Voltage two lines(RED). unscrew board.
Pool board out.
Unscrew STK. Set board verticaly. Just pool STK bu pincet and heatup solder. One by one...
Set new STK with thermopasta on board in to hallsradiator. Screw up.
Wet contacts by liquid fluse. And sosler them.
Clean up by alcohol...Check for short by lense...
Set up board back...
Posted on Feb 20, 2009
You need convergence ics 2 stk392-560 and also a fuse
Posted on Apr 29, 2007
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