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Chapter 3 Troubleshooting
General Problems
1.
Paper is jammed inside the printer
Turn the printer power off firstly. Open the upper cover; remove the
jammed paper after the print head is cool down. Reload the paper roll and
close the cover again. Using high quality thermal paper, which matches the
specification and with smooth surface can lower the chance of paper jam.
2.
Paper feeding go side way
Turn the printer off, open the upper cover, reload and adjust the paper
rolls properly. Close the upper cover again. Using high quality thermal paper
which matches the specification and with smooth surface can lower the chance
of this phenomenon.
3.
The print out is not clear
Check the printerhead first. If cleaning is need, refer to the section about
cleaning the print head in this manual and clean it. Then check the thermal
paper which matches the specification or not. If print out still not clear after
taking the above actions, contact the qualified servicing professionals for
assistance.
4.
Printer doesn’t print but the Self-test is okay
Check whether the connecting cable between printer and host is connected
properly or not, and make sure the cable meets the connecting requirement (see
Chapter 1 for details). If the printer is still cannot work properly, please
contact the qualified servicing professional for assistance.
5.
The print out has missing column(s)
Check whether dirt is stick to the printer head or not. If so, please refer to
this manual for instruction of cleaning the print head. If the problem still exists
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after cleaning, some heating units on the print head may be damaged. Please
contact the qualified servicing professional for repairing.
6. Abnormal paper feeding
Check the whether dirst is stick to the plastic roller on the upper cover. If
so, clean the roller softly with a cotton swab moistened with alcohol solvent. If
the problem still persists, check whether the gear wheel of the paper roller has
been damaged. If the gear wheel has been damage, contact the qualified
servicing professional for repairing.
7.
Upper cover is locked caused by the auto-cutter errors
When this phenomena occurred, opening of the upper cover is prohibited.
Otherwise, printer will be damaged. Please do follow steps to resume
operation:
(1) Press [ ] to switch off the printer
(2) Open the auto-cutter manual knob cover, then using a sutiable “-
“ screw-driver to turn the cutter knob anti-clockwise until the cutter is returned
to its normal position.
(3) Power on the printer, if there is no auto-cutter error signal (see Figure
2-2), open the upper cover gently and clear the paper may jammed. Then close
the upper cover again to resume normal operation.
(4) If the auto-cutter is still locked, please redo the above steps again.
