2. Open the “RS232 I/F connector cover.” RS232 I/F connector cover 3. Connect the serial interface cable (option) to the printer and the serial port of the host PC. 4. Turn on the printer while pressing the FEED button. 5. The printer prints the self test result, which is necessary for the next step. Note: If you connect the serial cable to the printer while turning it on, the printer doesn’t support serial communication. Turn off the printer before connecting the cable. CAUTION: Do not pull on the cable while a serial cable is connected. Do not suspend the printer while a serial cable is connected. 2-24 Setup Rev. C