So you found a big black charred area in/on one of the yoke windings. What
can be done? Is it possible to repair it? What about using it for testing
to confirm that there are no other problems before ordering a new yoke?
|NotTaR of Television Sets : Deflection yoke repair
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If the damage is minor - only a few wires are involved, it may be possible to
separate them from each other and the rest of the winding, thoroughly clean
the area, and then insulate the wires with high temperature varnish. Then,
check the resistances of each of the parallel/interleaved windings to make
sure that you caught all the damage.
Simple plastic electrical tape can probably be used for as insulation for
testing purposes - it has worked for me - but would not likely survive very
long as a permanent repair due to the possible high temperatures involved.
A new yoke will almost certainly be needed.