Question about Emerson EWV403 VHS VCR
Question, do you have sound? I would venture to think that the power hit would have taken out the power supply thus killing the whole unit. So lets deal with this as though the power hit may have killed part of the unit. The first thing I would do is to determine if the RF stages are bad. I would inject a know good signal into the Antenna in of the VCR this can be done by using a modulator and a analog video camera to create the video signal, better yet use a VA62A universal video analyzer (I know I say use this a lot, but it cuts down on so much of the guess work). After you inject the signal use your schematic to trace down the point where the video signal stops. If I where to take a guess at this I would say that the Video Processor is bad. This has happend to me on two occations troubleshoot a loss of video only to find out that the entire Video processing stage was in one chip and a power spike killed the unit and this processor. So you might have a bad video processor. Make sure you are using a schematic when working on this problem, because I thin that is what the issue is a bad video processor IC. I hope it is something like the Tuner module or the video detector, but I am getting the video processor feeling from this problem.
Posted on Sep 06, 2007
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