Paxar 9830-CL Operator's Handbook Manual page 38

4. Press forward and down on the two latches on top of the
printhead assembly as shown. The printhead will drop down.
5. Lift the printhead assembly using the printhead tab and push
back until the printhead assembly clicks into place.
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,
7. Carefully plug the cable into the new printhead. The cable
connector is keyed, so you cannot incorrectly connect the
cable. However, it is normal to feel some resistance when
correctly connecting the cable.
CAUTION
before touching the printhead.
Care and Maintenance 4-7