Self-Printing - Citizen CT-S310II Mode D'emploi

4.4 Self-printing

While paper is loaded, press and hold the FEED button while turning the power
on. Hold the FEED button down for about one second and then release it to start
self-printing. The printer prints its model name, version, memory switch
settings, and a list of built-in fonts.
Firmware version
Interface
Serial communication
status
Buffer size
— 30 —
Memory
switch
setting