Serial Interface When connecting to the host computer through a serial interface (RS-232), connect a serial cable to the printer, start the host computer, and then turn on the printer. • When using connectors equipped with screws, tighten the screws on both sides to secure the connectors firmly. • When using interface cables equipped with a ground line, attach the ground line to the screw hole marked "FG" on the printer. Parallel Interface When connecting to the host computer using a parallel interface, connect the parallel cable to the printer, start the host computer, and then turn on the printer.
When using interface cables equipped with a ground line, attach the ground line to the screw hole marked "FG" on the printer. USB Plus Power Interface When using a USB Plus Power cable to connect with the host device, connect the flat connector of the USB Plus Power cable to the printer, and the square connector to the device. After starting the host device, turn the printer on. When using USB Plus Power Interface, be careful of the following points. • Do not connect an AC adapter and USB (Type-B) simultaneously. • Do not remove or insert the USB Plus Power cable while the printer is still on. 40