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Old 04-17-2012, 07:20 PM   #1
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TV Reception Issues, beware

I bought and installed an LCD flat screen a year ago. At the same time I re-wired my entire Audio/Video system. Every since then I have had a reception problem when using satellite, cable or antenna. I get lines in the screen that move in waves, sometimes bad, other times not so bad. I was sure I had wired something wrong and took on the task yesterday to trouble shoot and fix it once and for all. I spent all day, verified my wiring, "Correct" so I got to reading and was lead to believe I had EMI/RFI issues. Went and bought a new power strip with EMI/RFI. It did nothing to improve the situation. Finally, I unplugged the new TV and suddenly the other two TV's worked fine. The new TV had a power adaptor like you see for Lap-Top computers. I traded this TV for one I had in my office (no power adaptor), hooked it up, and all 3 TV’s work fine. The problem is the power adaptor on the TV was causing interference. Beware when buying a new TV that has a power adaptor. It could be just the brand I bought, VIORE, but I would opt for TV's without the power adaptor like you see for laptop computers.
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Old 04-17-2012, 08:03 PM   #2
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We have a flat screen tv in our tt. I noticed that it has a 12v input. I thought the tv would run on 120 vac. Is this a special model that is made for Rv's? It does not pick up a lot of channels even at our house. It does have to search when you stop and you have to tell it whether or not you are on air antenna or cable. I also found out on the last trip we took,that the heater fan runs on 12dc. I also thought that was a 120vac motor. We were spending the night in a church parking lot, and DW got cold. so I hit the heater switch, and was pleasantly surprised to hear the fan run. Reason for the church parking lot stay, was that we got into town after the state park closed its gates.
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Old 04-17-2012, 08:53 PM   #3
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Many of the flat screens on the market will run on 12 volts if they have an external power supply. Those that run on 120 volts actually have a power converter built in to the set itself.

I've rewired our rig to where there is a separate circuit that will run the TV sets and the satellite receivers on either shore power or an inverter that works off a separate bank of deep cycle batteries. The inverter can also power my CPAP machine.
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