285Internal shutterThe internal shutter is opened and closed by the rotary solenoid to shut off the path of laser beam.⿎ Effect from deteriorationWhen the rotation torque of the rotary solenoid declines, the opening/closing speed of the internal shutter is decreased orthe shutter may not work. In this case, an error “Internal shutter failure” occurs in the laser marker and marking cannot beperformed.⿎ Replacement interval• Total number of opening/closing operations has exceeded two million.• Alarm for the shutter error occurred.⿎ Replacement methodOur service representative handles the maintenance and replacement. Contact our sales office.Battery inside the controllerA lithium primary battery is contained inside the controller as battery for clock or calendar of the laser marker. Functionalcharacters such as the current date/time, expiry date/time, and lot date/time are marked based on the time of this clock.⿎ Effect from deteriorationWhen the battery inside the controller runs out due to aging, the date and time of the internal clock may be out ofsynchronization when the laser marker is turned OFF. If you start the laser marker in such a condition, warning “E251”for the decrease in clock battery voltage may occur, and the date and time setting is required. The warning is temporarilyreleased by resetting the date and time, however, once the power supply of the laser marker is turned to off, the warningwill reoccur or the internal clock will show the wrong time.In some case, the laser marker system cannot start up due to the battery error.⿎ Replacement interval• Warning “E251” for the decrease in clock battery voltage occurred.• Almost five years have passed since delivery.⿎ Replacement methodOur service representative handles the maintenance and replacement. Contact our sales office.ME-LP400V-OP-6
