QuickLabel Systems QLS-4100X Setup Guide download pdf (Page 92)

QLS-4100 X 92

After normal use or as a result of a failure, the printheads will eventually need to

be replaced.

Some symptoms of printhead failure include:

• Significant reduction in printed image darkness that cannot be corrected by

using an increased print intensity.

• Vertical line(s) of missing print running through the entire length of the label.

• A wide vertical area of missing print indicating physical wear to the printhead or

an electrical failure

The following procedure explains how to remove and replace a printhead.

Caution

Printheads can be damaged by static electricity. Always use standard

anti-static procedures when replacing printheads.

Caution

To prevent personal injury or damage to electronic components, ensure

that the printer is turned off and the power cord is disconnected.

Turn the printer off and unplug the AC power cord. Lift the printer’s side cover.

Remove the black guide roller under the static brush for easier access to the

printhead mounting screw. There are three inline screws on the outer plate at the

end of the guide roller. Remove the two lower screws and pull on the tab to slide

the center shaft out, releasing the guide roller to drop down.

Remove the platten roller if you are changing the printhead on print station #1.

Use a Phillips screwdriver to loosen the captive printhead mounting screw over

the top of the printhead.

Raise the printhead assembly by the handle to allow the printhead to drop down

away from the bracket.

Gently pull the printhead out to the side until the three connectors on the top of the

head are exposed.

Disconnect the three printhead harness connectors on the printhead by pulling

straight up on each of the harnesses.

Printhead Replacement

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QuickLabel Systems QLS-4100X Setup Guide Page 92