Question about Toshiba 46H83 46" Rear Projection HDTV-Ready Television
We woke up yesterday morning to our colors all out of whack on our Toshiba 61" rear projection tv. I have tried to use the convergence and I was able to fix the blue correctly, however, the red color will not correct. It is stuck to far to the right and will not move any more to the left to get it alligned...is there a way to fix this on my own?
If you can't adjust the red convergence in one direction then it is probably one of the convergence IC's. If you are handy and can solder then read on.
Before you replace the IC's, check for bad solder connections at the IC's and output resistors below the heatsink. Sometimes the solder connections crack over time.
Make sure the tv is unplugged for at least 5 minutes before poking around. The power cord can be unplugged from the power board and removed to keep anyone from plugging it in while you are working on it.
The STK's are the large 18 pin integrated circuits (chips) mounted to the large heat sink on the convergence board. This is the board on the right when viewed from the back of the TV.
The resistors are beneath the heat sink on the left side of the board. There are also fusible resistors, like #7711, on that side. There are NO pico fuses in this area.
Check the fuses on the Power board. This is the board on the left when viewed from the back of the TV. You can remove both boards in the carrier by carefully unplugging all connectors, noting their locations and routing.
To remove the high voltage wires from the splitter, mark them for position then grasp the boot and turn counter-clockwise about 10 degrees to unlock them and then pull up while holding the High voltage splitter. The small high voltage wire can be removed from the flyback transformer by pulling hard while holding the flyback.
STK392-110 can be replaced with STK392-120, STK392-180, STK394-160.
I have found most of the parts at newark.com. Also check out this site for some very good info: http://www.hometheatershack.com/forums/diy-repair-maintenance/5600-crt-based-rptv-convergence-repairs.html
btw: I am not affiliated in any way.
Make sure that while you have the boards out you look for any bad solder connections. A lot of problems arise or return because of this.
I hope this helps, I have been doing a lot of searching to get this info and hope it helps you. Too many people want to trickle the info and pretend they are giving you gold. A few hobbyists or people that can't afford to pay $300+ for repairs are not going to hurt their business.
Be safe and share knowlege freely!
Posted on Mar 02, 2010
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Posted on Jan 02, 2017
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