Question about Projection Televisions
My Projection TV seems to be out of focus. The problem is on the left and right 1/4 edge of the screen. The center of the screen looks OK. The screen has a double image in red. I tried the manual convergence adjustment, but the adjustment crosses will not move when I try to adjust them.
You can replace the convergence amplifiers on your circuit board pretty easily. They are an inexpensive part that goes out often. I replaced mine myself and I don't have any training in this area..The amplifiers are attached to heat sinks with cooling fins. Very easy to locate. You need a solder remover with a sqeeze bulb on it ( Radio shack $14). This will allow you to remove the solder on the bottom of circuit board with out making it too hot. If you leave your soldering gun on there too long you can burn the circuit board so be careful. Also there is a capacitor in your TV that holds a lot of electricity so be careful and don't touch anything else that is conecting to power. You will first want to unplug your TV and by a repair manual that will help you with this service. Take off the back panel and you will have to unhook about 10 different plugs so mark them when you take them out. There are numbers by where they plug in. This way you can unscrew the circuit board and lift it up on edge so you can remove the solder, there is about 20 little solders on each covergence amplifier that will have to be removed before you unscrewing the amplifier from the heat sink to replace. When reinstalling you need to put a white paste on the back of each amplifier before reinstalling. Radio shack will know what you are talking about. Make sure that none of your solders are touching the other, be sure and get a small gauge of solder and not acid based or it will eat your circuit board, be sure and get resine solder. I wish I could show you but no pics available. This is for the PT-53WX52F Panasonic model. I hope this helps.
Posted on Jan 09, 2008
They have inherent problems with the glycol oil used to cool the tube leaking past the bladders & onto the boards.... & it's conductive :p
Posted on Dec 11, 2007
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