QuickLabel Systems QLS-4100 Operation & Setup Manual page 142

To clean printheads:
1 While the printer is on, lift the printhead that will be cleaned. The
following message will display.
Head x up
SELECT to disable
Press the SELECT button. The indicated print station will be disabled
and the following message will display.
Head x Disabled
2 Turn the printer off and unplug the AC power cord.
Caution: Always power off and unplug the printer before cleaning the
printheads.
3 Clean the printhead with a soft cloth or lint-free wipe soaked with
Isopropyl Alcohol. Harsh chemicals and solvents should be avoided as
damage to the printhead could occur.
Caution: Never use a hard object of any sort to clean the printheads.
Damage will result if the edge of any hard object is used to scrape away
accumulated printing residue from the printhead.
7-4 Maintenance and repair