Question about Philips Magnavox 20MS233S 20" TV

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Remote no longer works

After a nearby lightning strike (which took out a variety of other stuff) the remote no longer works on my set. It's not the remote itself as I also have my Dish remote set up to control the TV and it doesn't work either. It sounds like it might be a power supply problem with the remote receiver and I do have the skills to work on it but I'd like some guidance before I dig in.

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In side of the TV set there is a remote receiver module. In some models of sets, there is no module. They use descrete components on the main circuit board. The fault could be in the remote receiver section. In some models of TV sets there are some remote amplifiation circuits along the way to the uPC controler. There could be a fault along this path.

The service tech would troubleshoot this by verifying the voltage supply to the remote receiver circuits. Then he would shoot an IR remote signal to the receiver, and then follow the data flow from the output of the IR reciever circuits along its signal path to the uPC controler. This way, he should be able to see with the scope where the data signal is failing.

Jerry G.

Posted on Jan 10, 2009

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