Appendices 103Chapter 4Cleaning the Sensor Glass, Shading Boards, andthe RollersIf scanned images have extraneous marks, or if the scanned documents aredirty, then the sensor glass or rollers inside the scanner may be dirty. Cleanthem periodically.1. Pressing the OPEN knob from both sides, raise the upper unit.CAUTIONThe pickup roller is located in the middle of the upper unit. Do nothold the protrusion on the upper unit when you open it. Doing somay deform the pickup roller or cause a feeding error.NoteThe location of the sensor glass and various rollers are shown below.2. Use a blower to keep the interior of the scanner free of dust and paper particles.RollersRetard RollerSensor GlassesPlaten Rollers Pickup RollerFeed Roller
