Re: 2235 AN/USM-488 power supply low voltages


Im still struggling with this power supply

If I remove the A5 board from the scope the power supply voltages return to normal and can be adjusted to spec by adjusting R938. As soon as I plug the A5 board back in the voltages drop to the following levels: and R938 has no affect

Also when I adjust the Scale Illumination knob the with of the trace shrinks

Any and all suggestion would be appreciated


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