to initiate the self test mode, depresss the feed button while turning on the printer power. the printer will calibrate the label length. if the label gap is not detected within 7", the printer stops feeding labels and the media is treated as continuous paper. in self test, a check pattern is used to check the performance of the thermal print head. following the check pattern, the printer prints internal settings as listed below:

    1. printer model and firmware version

    2. mileage (e series printers without this list item)

    3. flash times (e series printers without this list item)

    4. check sum

    5. serial port setting

    6. code page setting

    7. country code setting

    8. print speed setting

    9. print density setting

    10. label size setting

    11. gap (bline) width and offset setting

    12. backing paper transparence

    13. file list

    14. memory available

    when the self test is completed, the printer enters the dump mode. please turn the printer's power off and then on to resume normal printing.