Question about Mitsubishi WS-55809 55" Rear Projection Television
Where are the chips located.
If you are looking from the back there are 3 circuit boards, the one on the left is green and the other two are tan. The middle on is where the stk's are they are mounted to that big metal heatsink in the middle of the middle board. If you cannot located them email me a picture and I will circle it.
Posted on Oct 05, 2008
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Mitsubishi convergence IC replacement: this applies to sets that use (2) STK-392-570
The Idea here is to get the Middle Circuit board out so you can replace the Convergence Ic’s.
HERE is what you will need: (most of this you can buy on the internet or at local electronics stores)
Two new: STK-392-570 CONVERGENCE IC’S
One good soldering iron
De soldering braid or wick
Heat sink compound (grease)
One short Philips screwdriver
One small clean toothbrush
One electric screw gun to REMOVE screws
Turn the set on and examine the picture for how the Convergence looks bad---when you are done examine it again---once in a great while you will get and install a new IC that is bad. Remember this when you have finished—if the convergence is still bad but different from what you started with you may have installed a new I.C. that was bad. Turn the Set off.
Posted on Nov 18, 2009
The lense adjustment won't help. There are two convergience chips inside, each has 16 pins. If you take the big tray, with all the boards, out and turn it over, you will see that one of the chips has a pin that goes to a contact labeled, "RH." You can't miss the chips, they are stuck to a huge, finned heat sink, about 4'' x 7". Check the continuity from that pin to it's contact with an ohm meter. You may get lucky and get by with simply a re-solder or jump on that pin. Those convergience chips are like computer processors, are subject to extreme heat, depend very heavily on their heat sinks and cooling fins and could easily get hot enough to break a solder connection. Like computer processors, they should have been designed with fans as well as heat sinks. Don't kill yourself. Even unplugged, a tv has enough stored energy to be fatal.
Posted on Aug 22, 2010
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