Q5686A/Q5687A STAPLER (3) Cartridge detection The presence of a cartridge and its proper setting are detected by the cartridge switches R and F (SW701 and SW703) within the stapler. If no cartridge is found or if a cartridge is improperly set, an error message is shown on the finisher LCD. (4) Staple detection control shown on the finisher LCD. When staples run out, the stapler SW R and F (SW702 and SW704) turn on with an error message II UNIT EXPLANATION 2-33