User's Guide 43
TROUBLESHOOTING AND MAINTENANCE
Troubleshooting
Generally, when a malfunction or an abnormal condition occurs, the “POWER” LED will keep
blinking. Printing and communication between the host and printer will stop.
Power and Ready LEDs blink together at the same time
Possible Problems Solutions Remarks
Missing gap Check the media path
Check the paper sensor
If using continuous media with
Windows then in the Paper Tab
section continuous should be
selected.
Media out Install a Media roll
Media not installed Install a media roll
Media jam Clear the jam Verify that the media is routed
correctly.
Printhead module is
not closed
Close and latch the
printhead module
Power and Ready LEDs alternate blinking
**
Possible Problems Solutions Remarks
Ribbon has run out Supply the ribbon roll Does not apply to direct thermal. If
you use direct thermal and run under
Windows the Ribbon should not be
selected.
Ribbon jam Clear the jam not for direct thermal
Ribbon sensor error Replace the ribbon sensor not for direct thermal
Note:
**
The FM402DT does not use a ribbon and should not display this error.
Only the Power LED blinks
Possible Problems Solutions Remarks
Serial I/O error Check the baud rate
Check the flow control
Memory full Add the extension RAM
Cutter failed, or jam
at cutter
Check the cutter
Clear the jam
Only when cutter is installed.
Hardware error Call for service
