Question about Mitsubishi VS-45603 45" Rear Projection Television

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Brightness "Flicker" Hey Big Irish Thanks for your advise before. I replaced the ICs and it works great. I even made a few mods to improve it. I stuck some IC sockets in so that if the ICs go out again, all I have to do is pull out the old and stick in the new. I also drilled out the head sink and threaded holes to mount the ICs better and get better heat transfer. Before it was some crappy thing that just pushed on the front of them. Any way, now I've noticed that the brightness will come in and out once in a while. Its a minor problem compared to the convergence but it is rather annoying. What could this problem be?

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  • Andrew Hawkins
    Andrew Hawkins Oct 06, 2008

    Does the fluid have a color because I've looked a little and it's not something that happens all the time that would indicate damage. Having a blob of "coolent" on a board seems like something that would be somewhat perminent. I do have "IRIS", I think that was the name of the setting, turned on. It initially turned the screen dark. Does this have anything to do with it? what is this setting? thanks

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  • Master
  • 927 Answers

Good Day;

More than likely your TV has "COOLANT" (ethylene glycol) on the circuit boards. This fluid comes from the CRT's (picture tube) this fluid is used to keep the CRT's cool, such the name. This fluid from the CRT's leak when TV is on for long periods of time, the chamber expands and the seals leak.

One can remove this fluid by using "acetone" & small brush. The fluid is hard to see, use bright light, they spots can be smaller then a DIME. Also, the fluid can corrode the parts and traces on the boards. To protect the TV in future place heavy plastic or thick cardboard over affective area, make sure TV has proper air flow around TV.

If after the fluid has been removed and TV still does not work, call an Authorized Service Center to come out and repair TV after giving you an Written Estimate. The boards are not available.

Always try resetting the TV by unplugging it for one minute then plug back into A/C outlet and ALWAYS UNPLUG TV BEFORE ATTEMPTING ANY REPAIR ON THE TV.

Good Luck, big IRISH.

Posted on Oct 05, 2008

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