When using Intelligent Quality Optimizer IQ-501, make sure Video Interface Kit VI-514 is mounted to the machine.
When using Auto Inspection Unit UK-301, make sure Video Interface Kit VI-515 is mounted.
When connecting the machine to a computer using a USB cable in order to use it as a local printer, make sure Local Interface Kit EK-612 is mounted.
When using Paper Feeder Unit PF-713, make sure Upgrade Kit UK-112 is mounted.