Question about Pioneer SD-643HD5 64" Rear Projection Television

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SD-643HD5 64 in. Rear Projection TV

The picture sometimes has a greenish appearence at times (I think that the red is missing) after a while the color will correct and then go greenish again. there is also a flickering red line that flashes accross the screen at times. If you bump the set the color flickers.

It seems like either the red crt is either going out or there is a loose connection.

Is there a fix, and what would it cost?
Would it be worth it to repair?

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I have s Sony KP-48PS2 rear projection tv and from green crt lamp the picture is missing,but the lamp is on with green light on it and the red and blue lamps are out of focus and i cant adjust them at all. I solder all pcb boards. The coolant in all lamps look the same,bright with no defelection. Please,what seem to be the problem? Could STK chips be wrong even if they are warm? P.S. Sorry on my english.

Posted on Dec 26, 2012

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I had the same problem which was caused by a bad solder connection on my Green CRT driver board. The fix isn't too difficult if you've had some soldering experience.

1) Determine which CRT is going out (Reg, Green, or Blue). Looking at your convergence adjustment screen will help.
2) Unplug TV
3) Remove the front panel
4) Locate the driver board attached to bottom of the bad CRT.
5) Locate the two large heatsinks on the driver board, each has a transistor attached to it.
6) Touch-up the three solder connections on each transistor. Adding some new solder helps.

Posted on Sep 30, 2008

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