Appendix a: troubleshooting, Testing the printer – Star Micronics LC-1021 User Manual
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Appendix A: Troubleshooting
This appendix will help you if you experience problems with your printer. It 
tells you how to test the printer, how to check system software settings, and how 
to adjust the vertical alignment. In addition, there is information on actions to 
take for specific problems.
Warning!
The printer uses high voltage. Do not attempt any other repair or maintenance 
except as expressly recommended in this appendix. Unauthorized repair and 
maintenance not only exposes you to the danger of electrical shock, it also may 
damage your printer and void your warranty.
Testing the printer
There are three different tests you can use: a short test, a long test and a 
hexadecimal dump.
Short test
❏
Make sure that paper is loaded in the printer.
❏
Turn the printer off.
❏
While holding down the control panel’s
ON LINE
button, turn the printer
on.
The short test prints the version number of the software contained in the 
printer’s ROM followed by the current EDS settings.
Note:
The short test prints across the entire width of the carriage. Make sure that the 
printer is loaded with the widest paper available in order to avoid damage to 
the print head and platen.