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Old 10-14-2017, 03:50 PM
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Electronic M Electronic M is online now
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Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
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First off reduce brightness till the blacks are not lighting the screen or are to the minimum amount perceptible. The dimmer the pic settings the longer the CRT eill live and often the better the focus. Second adjust the fine tuning knob (outer ring of the VHF channel knob for best compromise of detail, sound and color). Some sets you need to push in and turn the knob to engage the gearing....The fine tune should go from static to monochrome pic to normal pic to pic with color squigelies back to statis through it's range...If you can't hit static in both directions then something is wrong. lack of correct fine tune can look like a focus issue...

If it is a focus issue look at the focus adjustments available and see if changing them will have an effect. IIRC this one adjusts focus by swapping which terminal the focus wire goes to. Focus can change with HV level if good focus not achievable, suspect wrong HV setting.


The set may benefit from Grayscale, purity and convergence adjustments. (all searchable here, and should be covered in sam's too). Get focus, sweep size, centering and linearity right before messing with purity or convergence (they interact).
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