Question about Sony KP-43T90 43" Rear Projection Television
The picture is showing a shadow and is more than 1 color
Convergence problem and because of age of set may not be worth shop repair-----Tvrepairparts.com sells kits based on model number for this.
Posted on Nov 05, 2012
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Posted on Jan 02, 2017
SOURCE: No power no lights good fuse...
Try a different power outlet? Possible shut down of DC supply due to short circuit can be heard if listen close at back of TV on plug in or power up with remote for a quick squeel then ticking sound or tick tick tick and nothing.
Posted on May 24, 2008
Your TV has gone crazy on you because your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack. Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go. If you need to order a resistor or two,
http://servicemanuals.vstore.ca/index.php/cName/convergence-resistors If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly! If this STILL doesnt make it look right, you will need to find out how to get into service mode and do a coarse convergence adjustment. This information can be found in the Service manual for your set. If you dont have one you can download it at manualuniverse.com
Hope that helps!
Posted on Jan 17, 2009
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.
Posted on Mar 13, 2009
SOURCE: sony KP-43T75 color repair
I've had a convergence issue with my KP-43T75 and recently the TV made a "pop" noise and the picture+sound went out. The standby light repeatedly blinks twice over and over. Holding power button on startup causes a long blink, then the double blinks start and repeat.
I understandthat replacing the entire G Board (A-1316-471-A) will replace both problems but I can't find the part in stock, though I've seen it listed for $200. Any leads?
Posted on Aug 31, 2009
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