Rev. 1.0 - 34 -LD630D/LD640D6-2 Cleaning Sensors, Roller or/and Paper Path1) Open the paper cover and then remove the paper.2) Remove any dust or foreign substance using dry cloth or cotton swab.3) Soak the cloth or cotton swab in alcohol for medical use and use it to remove adhesiveforeign substances or other pollution materials.4) After cleaning the parts, do not use the printer until the alcohol evaporates completely(1~2 min) and the printer has completely dried※ Clean the parts when there is a degradation of performance in printing quality or paperdetection.Lower Gap SensorBlack-Mark &Notch SensorPaper HolderPeel-off Sensor(Option)Platen RollerPeel-off RollerRidgesPaper RollerHead CoverRidgesUpper Gap Sensor