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Degaussing problem Hi can you please tell me if degaussing a Sansui SV2918 TV does not help, what else could be wrong. Could it be the croma or demodultor in the main IC. The colors come wright if you degausse it with a coil. But if you turn the tv of for a while and you turn it on again the colors is smeared again. Mainly green. Thank you

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There is an automatic de-gaussing circuit within the TV and it's likely to be the culprit. When the set is first turned on (before you even see a picture) this circuit is active and as it warms up, a thermistor opens up and stops the circuit from operating. It does this because as it heats up it's resistance rises and the circuit stops the current flowing through the de-gaussing coil. Over time from the heat/cool cycle, the connections to the circuit board fail. Simply re-soldering the thermistor is probabaly all that's needed.

Posted on Oct 09, 2008


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By the sound of this you have a degaussing problem! I think what has happened here is the degauss circuit has failed and the usual cause is the POSISTOR.

What you should try to do is switch the TV on, then OFF again and leave it for 30 mins before switching on again. When you have done this and the problem is no better, then contact a service centre who will cure the fault for you.

Alternatively, try to borrow a DEGAUSS COIL and with the set on, switch the coil on and by using a circular motion go around the screen of the TV moving backward slowly as you do it. When you are say 6 feet away from the screen switch the degauss coil off.


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Your CRT (Picture Tube) screen mask has become magnetized. You need to degauss the CRT. Have you moved you TV lately or at any point had speaker sitting next to it? These are two things that can magnetize the screen mask. Well in any event you will need what is called a degaussing coil to demagnetize the CRT.

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Standing about 10 feet from the TV Screen turn on the degaussing coil which is in a vertical position and rotate it in a circular motion walking towards the TV .

Once about .5 to 1 inch from the TV continue to rotate the degaussing coil and the move away from the TV while still rotating the coil.

Once at the point where you began, position  the coil to a horizontal plane and quickly move the coil back about two feet and the turn the coil off.

This will deguass the CRT.

Thank you,

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