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 |
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| Missing gap | Check the media path | If using continuous media with |
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| Check the paper sensor | Windows then in the Paper Tab |
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| section continuous should be |
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| selected. |
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| Media out | Install a Media roll |
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| Media not installed | Install a media roll |
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| Media jam | Clear the jam | Verify that the media is routed |
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| correctly. |
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| Printhead module is | Close and latch the |
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| not closed | printhead module |
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Power and Ready LEDs alternate blinking ** |
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| Possible Problems | Solutions | Remarks |
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| Ribbon has run out | Supply the ribbon roll | Does not apply to direct thermal. If |
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| you use direct thermal and run under |
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| Windows the Ribbon should not be |
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| selected. |
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| Ribbon jam | Clear the jam | not for direct thermal |
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| Ribbon sensor error | Replace the ribbon sensor not for direct thermal |
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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 |
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| Check the flow control |
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Memory full | Add the extension RAM |
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Cutter failed, or jam | Check the cutter | Only when cutter is installed. |
at cutter | Clear the jam |
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Hardware error | Call for service |
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User's Guide 43
