Citizen PMU2300III User Manual page 17

 Main board cover
The main board can be exposed by unscrewing one screw that fixes the main
board cover and removing it by sliding it.
 Auto cutter
Automatically cuts the paper when printing is finished.
 Platen open lever
Used in an instance of cutter error or paper jam.
 Tension bar
Absorbs the shock at the rotation of paper roll.
 Printing head
Prints characters and graphic data on paper (paper rolls).
 Interface connector (3 types)
Serial, Parallel, USB cable are connected to the interface connector. The serial
interface board is equipped with a DIP switch.
 Power connector (Input voltage : DC24V±10%)
Refer to 4.2 How to Release Cutter Lock (Cutter Error)
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