Good day all
I have a problem with my oscilloscope GOS620, i can see the Y axis trace but so sweep on x axis except when pushing power button the first time, i see a fast sweep then the dots representing the low and high voltage of the oscilloscope internal pulse generator. I can move the dots with the position knob left and right and up and down. Dots are changing its position very slowly like 1 division / 5 min.. please advise.
Please check attached photos
And the instrument pcb design
Regards
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