Troubleshooting Topics
1.No power
•Check that battery is installed properly.
•Recharge or replace battery as necessary. Always dispose of batteries properly. Refer to Appendix D for more information on proper battery disposal.
2.Media does not feed:
•Be sure print head is closed and latched.
•Check spindle holding media for any binding.
•If unit is equipped with label presence sensor: Ensure most recently printed label is removed. Also ensure label sensor is not blocked.
3.Poor or faded print or 
flashing:
•Clean print head.
•Check battery and recharge or replace as necessary. Always dispose of batteries properly. Refer to Appendix D for more information on proper battery disposal.
•Check quality of media.
4.Partial/missing print:
•Check media alignment
•Clean print head.
•Ensure printhead is properly closed and latched.
5.Garbled print:
•Check baud rate.
6.No print:
•Check baud rate.
•Replace battery. Always dispose of batteries properly. Refer to Appendix D for more information on proper battery disposal.
•Check cable to terminal.
•Establish RF Link (Wireless units only) and/or restore LAN associativity (Printers with WLAN radios only).
•Invalid label format or command structure — put printer in Communications Diagnostic (Hex Dump) Mode to diagnose problem.
7.Reduced battery charge life
•Check battery date code — if battery is one to two years old, short charge life may be due to normal aging.
•Recondition battery.
•Replace battery. Always dispose of batteries properly.
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QL Series User Guide