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In Reply to: Re: Hum/Component Cables/Scaler/DVD Player posted by Rags on December 03, 2002 at 16:08:41:
do you have ANY other cables connected to the TV that end up at the receiver...S-Video, Composite, Coax??????It could be a bad solder point.... you should be able to use a Multi Meter to measure the resistance and see if that's the problem..... disconnect 1 at a time if the problem only goes away when all 3 are disconnected then you STILL have a ground loop!
Sam
Follow Ups:
Wait..... why would you get an audio hum caused by the component cables if it is NOT a ground-loop???? does not make sense that it would be a poor solder point....(since component hook-up is STRICTLY video and carries no sound information)I'm certain your problem IS a ground-loop.... you just have to isolate components until you find the culprit... Just make sure that you have "0" connections coming from the TV to prove it's not the cable from the TV causing your loop....
Sam, I think you are on to something. While I am not home at the moment, I will start with the DSS, Cable, and remote antenna cables.I agree with you that it has to be a ground loop. The DSS was installed by a professional; however, now a days that does not mean much. Since these cables separately, or through a common cable, flow to the scaler, I'll bet they are the source. If so, the hum travels up the component cables to the DVD player, then through the audio cables to the pre-amp. I do not quite understand the electric principals governing the event, but if I disconnect the component cables the hum goes away.
Thanks for your help Sam!
Rags
"Always Searching for Perfection"
The Dish should be grounded before it enters the house, but the installer probably used the nearest source and NOT the common house ground!Sam
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