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I have had a chance to look into the vertical problem and it is indeed the vertical output transformer. One of the convergence secondaries appears to be shorted somewhere. When in the circuit, there is no vert. sweep, the two 2200 ohm resistors feeding 410V from the power supply start smoking and the transformer gets hot and emits an odor where this secondary winding connects. When I disconnect the winding, I have restored vertical sweep and everything is stable. I am going to replace the vertical transformer, the two power supply resistors and those 1000V caps as a preventative.
I think after this, it will be alright for a while.
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Just look at those channels whiz on by. - Fred Sanford
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06-09-2007, 01:30 PM
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