Avery Dennison Monarch 9855 Operator's Handbook, Maintenance, Service & Parts Manual page 102

6. Carefully unplug the cable from the printhead as shown. The printhead
is sensitive to static electricity, which can damage the printhead or
reduce its life. Ground yourself by touching some metal, such as the
printer's metal base, before touching the printhead.
Carefully plug the cable into the new printhead.
7.
Align the new printhead with the tabs.
8.
9. Snap the printhead into place.
Do not
touch here
9-6 Operator's Handbook