Cleaning
QL-300 User Guide 366
22 Install the F0 roller unit, and fasten the two screws.
23 Use a lint-free cloth moistened with alcohol to wipe, in one direction, the dirt off the sensor
cover (upper).
24 Use a lint-free cloth moistened with alcohol to wipe, in one direction, the dirt off the sensor
cover (lower).
25 Close the unwinder cover.