Re: Meguro MO1255 'scope.
Is this a scope that has been in regular use? If not, leave it on for a while and see if things improve. If there is no improvement, I would check all supply voltages, for correct voltage and ripple level. You may need use of another scope for this. If all is in order check the resistors in the focus circuit. You may find some may gave drifted high or open circuit.
Bill
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