Operating Light Control Rheostat does not Change Light Brightness: Description

The meter CPU receives signals to adjust illumination of this circuit. The meter CPU detects the illumination level selected by the user according to the position of the rheostat knob.

HINT: 

• This model is equipped with an optitron meter, therefore the meter illuminates even in the daytime.
• The meter illumination level can be adjusted by turning the rheostat.
• The meter illumination dims when the light control switch is turned to the TAIL or HEAD position at night.
• Turning the rheostat knob fully upwards cancels the above dimmer control.