Question about Sharp 32C-240 32" TV
Problem 1: Ok first of all it's a Sharp 32in TV, not like all the other topics which seem to span all sorts of TV's, why is that? Anyway the problem I have is, well sometimes while watching TV 2 color spots will pop up on the TV one on the left and one on the right. The left is like a yellowish and the right is more of a purpleish, hard to see but if you try they are noticable and annoying. We haven't had the TV long before this started either, maybe a couple months or so but it eventually goes away it's just random. It's almost as if someone is putting a magnet up to the screen in those 2 areas. Nothing around it seems to be the problem and the only thing on top of it is a DVR from our cable company and I tried moving it to see if the colors moved at all and nothing! help, thanks
Spurrious Colours on the screen. If the colours are there on all the TV channels and DVD or VCR or whatever you are looking at, then I agree with jomaru; it must be the tube. Incidentally have you tried simulating it with a magnet?, but do not bring the magnet too close as it may become permanent. When you switch off, and after a few minutes switch on again, the de-gaussing coil behind the tube should energise at mains frequency with a decaying amplitude lasting a few seconds. The alternating magnetic field created should be strong enough to wipe out any permanent magnetic effects which may be stored in the MU-Metal shield. The shield is necessary to screen the Earths magnetic field, and other random fields that may be present. You may need to disconnect, and reconnect the set from the mains to activate the de-gaussing operation. (If it is working!). Another cause of spurrious audio noise and coloured patterns or effects is if the tuner, or input circuits, are picking up from another TV station, or signal source. Satelite dishes for example do not focus sharp enough, so will pick up the signal from an adjacent satelite working on the same frequency. Another source could be a powerful transmitter closeby breaking into the TV's Intermediate Frequency section.
Posted on Oct 21, 2006
The answer to the first question is your picture tube is bad,I hope you have warranty left and you can put a claim,this ia a very rare symptom but I have seen it and sometimes no even a new picture tube takes care of the problem because all the crt used came from the same production line or the same type of tube.The only good thing is that the spots are not there all the time. The noise can be cause by a coil or transformer and is also intermitant,this one is easier to find because the moment you touch the noisy coil it stops or changes tone and that is how you know you found it.I need to be replaced with an exact replacement part.If you are familiar with tv service you can remove the back and with a wooden or rubber handle you can press lightly on any coil or small transformer and you will se how it changes or stops,if you are not too familiar with tv service be safe and seek the help of a servicer.Let Us know how it goes.
Posted on Oct 19, 2006
Sorry, but I have seen this problem three times already. It is a bad connection in the deguassing circuit or an intermittant part.
Posted on Oct 19, 2006
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