I took the right (Green) board out to repair bending convergent red signal and now it is flickering rapid. The board was tested OK and two STK392-110 ICs (driver chips) was replaced with 2 from electronix by a service repair person. It didn't flicker before replacing the 2 stk392s. What could possibily be wrong with It? Bad stk392s or something else?
Maybe on the tan board? Please help.
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Re: Rear projection 43" Tv
The black box with 4 large red wires in it is the high voltage distribution box. One red wire brings the high voltage in and the other 3 bring high voltage to each of the 3 picture tubes. If those red wires are not all the way in and tight, then there will be high voltage arcing inside that box and the picture will rapidly flicker. Make sure all red wires are pushed all the way into those holes and your picture should be back to normal. Convergence IC's will not make the picture flicker, so I am sure your IC's are fine.
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The DLP tv alway have problems with it convergence board problems.Tries flash focus button or manual + - convergence R,G,B colors lines alignments up.Still have the same problems,the convergence board is dead or have problems,convergence board must be fix to solved the green haze problems.
This tv the convergence board are dead.Any colors R,G,B mis alignment,don't matches any colors lines.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts are dead,must be replaced to solved convergence problems.The Shop will cost u $300-350 for parts and labors.
Try adjusting the convergence. If it won't move see below- red IC in particular This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks! See link for more detail http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html
Just a thought, but check all of the pico fuses for a blown fuse. The pico fuses look like a small yellow resistor. Some Hitachi's are famous for having a blown hi-volt ceramic capacitor and a blown pico fuse.
I think the red led on is a short protect indicator, but I could be mistaken.
You will not find the problem in deflection board it will go back to convergence board,I repaired one that would not Magic focus cause was on connectors from power board to convergence board the one closes to up front of board one of the pinns was bent under so when i pluged it back in did not know after lifting up connector under tiny pins 1 of them was bend under straighten it so it could plug in right Fixed problem.
jaymz, you can`t move the green, the green tube is always mounted in the middle and is not adjustable from the convergence menu. red & blue should be converged one at a time on top of the green, once you have accomplished this the crosshatch grid will be white and that means your done :)
Look up and read about the convergence amplifiers on this website. I just helped a friend repair his 53H71. We replaced the STK392-110 IC's on the signal board. The shop quoted him $400 for the repair. We replaced them for $35. If you're not comfortable soldering then this might not be a good repair for you to try. Good luck.
the last hitachi that had this problem i fixed it bad finding bad solder conenctions throughout the board that the convergance ic's are on, also i foind some on the two main board in my repair. hopefully resoldering the convergance foard will fix the jitter or jumping around problem. if the picture is too red you can also try turning down the screen control slightly.