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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Tv Blue area in corners
hello all , I have a flat screen TV at only a few years old and in the
corners are blue areas for every channel - I did some work experience at a Tv and Video shop once and if I remember right something on someons Tv happened the same , the tech. waved a rod in front of the screen to fix it.....my question is what is the rod , its it worth buying one or making one ? thanks plp .... |
#2
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First see if there are any sources of magnetic field, speakers, amps, etc in
close proximity of the set. If so then move those items away form the set. Switch the set off and leave it off for about 30 min. Then turn the set back on allowing the degauss circuit to attempt de-magnetize the crt. See if this cures the problem. Next you may need to have a tech come out and use a commercial degaussing coil or rod to de-magnetize the set. Failing to do it in this manner will mean opening the set up and diagnosing the actual cause, be it a slipped shadow mask within the crt, or if the centering and purity rings need readjusting. "Shaun B" wrote in message ... hello all , I have a flat screen TV at only a few years old and in the corners are blue areas for every channel - I did some work experience at a Tv and Video shop once and if I remember right something on someons Tv happened the same , the tech. waved a rod in front of the screen to fix it.....my question is what is the rod , its it worth buying one or making one ? thanks plp .... |
#3
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First check the easy stuff... make sure no magnets (speakers are a
common source) near it like Art said. Also some makes like Panasonic (might've helped if you posted the make and model) have a feature in the customer menus called "Geomagnetic correction". If somebody set this adjustment all the way to one end of its range, it would produce the symptom you described. Lastly, you may have a failure in the degaussing circuitry of the TV - Panasonic has had solder connections and / or failures of their thermistors that would cause failure of the set to properly degauss at turn-on. Degaussing the set EXTERNALLY with a degaussing coil or rod is only a temporary fix... The set should be able to do this for you automatically each time it is turned on cold. I would recommend correcting the problem rather than "waving the magic wand" over it, since that wil not permanently cure it anyway. "Shaun B" wrote in message ... hello all , I have a flat screen TV at only a few years old and in the corners are blue areas for every channel - I did some work experience at a Tv and Video shop once and if I remember right something on someons Tv happened the same , the tech. waved a rod in front of the screen to fix it.....my question is what is the rod , its it worth buying one or making one ? thanks plp .... |
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