micronut
New User
Feb 12, 2008, 3:52 PM
Post #1 of 1
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64" Philips 9P6444C Coolant Leak
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Hello,
I am a copier tech and I dabble in electronics repair as well. I have been reading the forums for a while, but never posted. I have a philips 9p6444c 64" rear projection tv that is in serious trouble. No picture or sound. Unit powers on normally. High voltage is present.
The TV had a convergence problem that was fixed easily. However, the coolant catch tray had a bit of coolant in it(about a teaspoon) so I put a piece of paper towel in there to soak it up. I planned to replace the coolant, but aside from that, the TV was working great.
To make a long story short, I'm an idiot. I forgot to cover the tuner board and the coolant wicked up the paper towel and dripped maybe 2 drops onto the board. Where it landed was between 2 jumpers that are about 5mm apart. The coolant there turned black and some of the surface of the board is corroded away, but vey little. It looks like an arc, but as far as I can tell, the coolant is not conductive.
I quickly removed the board and cleaned it thouroughly. The coolant splattered over a small area, but nothing appears damaged except the one tiny black spot.
My guess is that it is in the front end, but any advice would be appreciated. I am trying to find a new tuner board for it, but no luck yet.
BTW, I'll add some pics asap.
If I cant fix this problem soon, I'll probably part out the guts and keep the shell. I have an older DLP front projector that I got for next to nothing on ebay due to a defective lamp. I put a run of the mill $20 halogen bulb in it, bypassed the lamp detect circuitry, and voila!
Unfortunately, it is not as bright as I would like, but still decent. However, when placed in the cabinet of the Philips 64", all of that light is channeled and directed right at the viewer instead of bouncing off of a wall. The resulting hybrid picture is brighter, sharper, and much more clear than the crt's. I'm actually kind of hoping to go forward with this project instead of further repair. :)
(This post was edited by micronut on Feb 13, 2008, 1:46 PM)
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