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7. Troubleshooting 
 
The following guide lists the most common problems that may be encountered when operating 
this bar code printer. If the printer still does not function after all suggested solutions have been 
invoked, please contact the Customer Service Department of your purchased reseller or 
distributor for assistance. 
 
Power indicator does not 
illuminate 
* The power cord is not 
properly connected. 
* Plug the power cord in printer and outlet. 
* Switch the printer on. 
* The printer carriages are 
open. 
* Please close the print carriages. 
* Check if interface cable is 
well connected to the 
interface connector. 
* Check if wireless or Bluetooth 
device is well connected 
between host and printer. 
* The port specified in the 
Windows driver is not correct. 
* Re-connect cable to interface or chang a 
new cable. 
* Please reset the wireless device setting. 
* Select the correct printer port in the 
driver. 
* Clean the printhead. 
* Printhead’s harness connector is not well 
connected with printheat. Turn off the 
printer and plug the connector again. 
* Check your program if there is a 
command PRINT at the end of the file 
and there must have CRLF at the end of 
each command line. 
* Label or ribbon is loaded not 
correctly. 
* Use wrong type paper or 
ribbon 
* Follow the instructions in loading the 
media and ribbon. 
* Ribbon and media are not compatible. 
* Verify the ribbon-inked side. 
* Reload the ribbon again. 
* Clean the printhead. 
* The print density setting is incorrect. 
* Running out of ribbon. 
* The ribbon is installed 
incorrectly. 
* Supply a new ribbon roll. 
* Please refer to the steps in user’s 
manual to reinstall the ribbon. 
* Running out of label. 
* The label is installed 
incorrectly. 
* Gap/black mark sensor is not 
calibrated. 
* Supply a new label roll. 
* Please refer to the steps in user’s 
manual to reinstall the label roll. 
* Calibrate the gap/black mark sensor. 
* Gap/black mark sensor is not 
set properly. 
* Make sure label size is set 
properly. 
* Labels may be stuck inside 
the printer mechanism. 
* Calibrate the media sensor. 
* Set media size correctly. 
* Remove the stuck label inside the printer 
mechanism. 
* Peel function is enabled. 
* If the peeler module is installed, please 
remove the label. 
* If there is no peeler module in front of 
the printer, please switch off the printer 
and install it. 
* Check if the connector is plugging 
correctly.