Cleaning the Sensor – Upper Half of ZD421/ZD621 Direct Thermal Printers
Cleaning the Sensor – Upper Half of ZD421/ZD621 Direct Thermal Printers
Cleaning the Sensor – Upper Half of ZD421/ZD621 Direct Thermal Printers
Spray the upper web (gap) array sensor below the printhead with a can of compressed air. If necessary, use a swab moistened with 99.7% pure isopropyl alcohol to break up adhesive or other non-dust contaminants.
Discard the used swab.
Use a clean dry swab to remove any residue that may be left from the first cleaning.