Question about Maxent MX-50X1 50 in. Plasma Television

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Volume control problem

Last night my 50 in. Maxent plasma started acting strange. The volume control kept turning itself down as if someone was leaning on the remote (they weren't). Then tonight it was fine for a while and then the same thing started happening again. We tried unplugging everything for a few minutes, but when we tried to turn it back nothing works. Anybody know whats happening here?

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Re: volume control problem

The MX50X1 uses a series of tac switches for ch+/- vol+/- and power. It would be my first suspect. The vol- tac switch may have become thermal or what we in the industry refer to as the windex syndrome. We see this a lot on direct view TVs usually because the switching board is directly below the screen and every time someone cleans the screen with windex an trace amount of the fluid might drip all the way down to the board and invade one or more of the tac switches. This isn't the only reason a tac switch goes bad or becomes thermal sometimes it just simply fails... Tac switches are cheap (less than $2.00) but the labor to put them in is probably one shop hour. Find a good shop and have them do it - - If you're not sure where to find one goto: and start your research from there... Good Luck Bill PS: Impress the shop you call and tell them you think your TV has developed the windex syndrome. They'll probably think you know a lot more than you do about TV repair. :)

Posted on Jun 08, 2007

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Wow, that's a bit of an off brand...
It may be hard to find parts for.
If you can find parts, replacing the board with the audio section on it will be the easiest fix.
The cheapest fix is to get a stereo potentiometer, and put it inline with the speaker so that you at least have a manual volume.
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Here's a (quick and dirty) schematic of how to put a potentiometer in a speaker line correctly.
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2. Punch in a 3 digit code (provided below)
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