Question about Samsung TXN3298HF 32" TV

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Fuse blows when the dgausing coil is connected

Any guess

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If the fuse is blowing when the internal degaussing coil is connected, there is probbaly a shorted turn or multiple turns in the coil. A degaussing coil is made up of many feet of wire, wound in a circle around the perimeter of the picture tube.

When you first turn on the set, the coil is energized briefly and either a thermistor or relay shuts it off after a few seconds. If it didn't shut off, the coil would get very hot. When its activated, the set draws a fair amount of current because the resistance of the wire is low. You can actually hear the buzz on a TV set or monitor when the coil is energized and you can also hear it turn off.

If the normal resistance of the coil has changed, due to shorted turns or something nicking the coil, there will be a larger amount of current draw and the fuse will blow.

Maybe the circuit that shuts it off was defective and the coil stayed on and became damaged.

If the set works fine without the coil, then something has changed in the coil and that tells me that its resistance is now lower than it should be, or its somehow it shorted to ground.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim

Posted on Feb 13, 2008

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