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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Mitsubishi 50" Rear Projection red screen
Hello,
I have an older Mitsubishi rear projection tv that has had some pincushion and convergence issues for some time now but it never really bothered me. The convergence only slipped on the edges where the pincushion was off too. The new issue is that yesterday while watching tv the screen suddenly went red with lighter red wavy diagonal lines. After about 5 seconds of that getting brighter and brighter it powered off. Now whenever I turn it on that's what it does. After it clicks off you see the red flash a rectangle roughly 6" wide by 1.5" high that shrinks into a circle that slowly gets bigger and softer. Right before it goes completely black you can see a slight green circle in the 2 o'clock position touching the red. The only way to get the set to power back up is to unplug and replug. I tried the extent of my electronics repair knowledge on it (I hit the wood grain a few times with a rubber mallet) and have come up short. I assume it's broke pretty bad... I'm just wondering if anyone knows specifically how and more importantly, how much$? Thanks in advance, N2 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.507 / Virus Database: 304 - Release Date: 8/4/2003 |
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Mitsubishi 50" Rear Projection red screen
As stated in previous post, try swapping the CRT boards; also, the 200volt line
may be open to the tube; Mits uses small peaking coils that occasionally open up. I have actually seen one red CRT short out in a V-11 chassis set. |
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