6. Troubleshooting 
 
6.1 Common Problems 
 
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. 
 
Problem  Possible Cause  Recovery Procedure 
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 status from 
DiagTool shows “Head 
Open”. 
- The LED shows “Red 
(blinking)”. 
* The printer carriage is open.  * Please close the print carriage. 
- The printer status from 
DiagTool shows “
Err.” Or “Ribbon Encoder 
Err.” 
- The LED shows “Red 
(blinking)”. 
* Running out of ribbon. 
* The ribbon is installed 
incorrectly. 
* Supply a new ribbon roll. 
* Please refer to the steps on section 3.2 to 
re-install the ribbon. 
- The printer status from 
DiagTool shows “Out of 
Paper”. 
- The LED shows “Red 
(blinking)”. 
* 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 on section 3.3 to 
reinstall the label roll. 
* Calibrate the gap/black mark sensor. 
- The printer status from 
DiagTool shows “Paper Jam”.
- The LED shows “Red 
(blinking)”. 
* 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 gap/black mark sensor. 
* Set label size correctly. 
Not Printing 
* Cable is not 
serial or USB interface or 
parallel port. 
* The serial port cable pin 
configuration is not pin to pin 
connected. 
* Re-connect cable to interface. 
* Chang a new cable. 
* Ribbon and media are not compatible. 
* Verify the ribbon-inked side.   
* Reload the ribbon again. 
* Clean the print head. 
* The print density setting is incorrect. 
* Print head’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 
f the file and there must 
have CRLF at the end of each command