Strong impacts, exposure to electrical fields, or other unusual conditions may render the unit inoperative, and pressing the keys will have no effect. If this occurs, you will have to press the RESET switch on the bottom of the unit. The RESET switch should be pressed only when:
• an abnormal event occurs and all keys are disabled. Notes:
• Pressing the RESET switch will clear the date and time settings, the tax
rate setting, and the contents of memory.
• Use only a ballpoint pen to press the RESET switch. Do not use anything
breakable or anything with a sharp tip, such as a needle.
• After pressing the RESET switch, connect the power supply plug to an
outlet. Turn the power switch “ON” and check that “0.” is displayed.