M9/M11 Sterilizer Touch Pad / Display Panel LCD Contrast Adjustment Test and Repair
Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.
Use a small jewelers screwdriver to adjust VR1. Do not over rotate.
1.Remove top cover.
2.Locate Potentiometer VR1.
3.Rotate VR1 to adjust. Counter-clockwise = darker / clockwise = lighter
4.Replace top cover.