This LENCO MC-4000 stereo receiver when powered on will read Volume
position 16, when rotating the volume control CCW the output volume
increases rather than decreasing. It will stop at MAX 40 and cannot be
reduced. Pulling the powercord for at least one hour will reset the
initial VOL to 16 and the problem can be duplicated at will.

I have inspected the VOL control, which appears to be a sort of
digital shaft encoder rather than the old days potentiometer.
Presumably something is wrong with the logics in the set, can anybody
help to find the cause of the problem or knows its schematics ?

TY
Brasto