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after a longer viewing time I went to adj the focus, the plastic adj piece was very loose in the bore of the coil. I had noted before that when cold the focus is frozen, after a few min the adj loosens up and feel normal now when hot it practically falls out.
the Horz defection coil blue lead it tied to this coil.... hmmmm
I checked the resistance, 1.6 ohm should be 30. now this is with it in circuit, but I see nothing across it that would reduce the resistance but for a 100k resistor so unless that is shorted I would not expect to see this.
I have a new coil on order. Perhaps this will finally address the underscan, yes I got it to fill out the screen by careful adj of the centering control and careful selecting of horz tubes, but I think it should not be this critical, so perhaps a shorted coil would result in an impedance mismatch in the horz circuit that could put a drag on the fly. I check the waveform and PP on some other stuff like the horz blanking signal which comes off this coil, it was way down from spec too like 40% low.
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08-03-2010, 01:18 PM
Threaded Mode