If you send a print job and the printer does not print, check to seethe if the external signal interface (EXT) icon 
appears in the status bar on the top of the LCD screen. This is an error that may occur for printers installed with combo interface cards.
The EXT icon indicates that your printer has the setting for external print start signal enabled and is awaiting an external input/output signal for printing. If you are not using the external signal interface, you can disable the setting to solve this error by following the steps below.
- Set the printer to Offline mode. (Refer to printer operator manual for details: CL4NX/CL6NX |CL4NX-Plus)
- Select [Settings] > [Interface] > [External I/O]
3. Uncheck the [Print Start Signal] setting.
The EXT icon will disappear, and you can resend your print job to the printer for printing.
[01-00035-EN]