Zebra Industrial Printer ZT420

Warning: This cleaning procedure requires trained personnel with PPE!

Open the printhead assembly by rotating the printhead-open lever upward

Push down the peel-off mechanism release lever to open the peel assembly

Remove any media liner to expose the pinch roller

While manually rotating the pinch roller, clean it thoroughly with the swab from the Preventive Maintenance Kit (part number 47362). In place of the Preventive Maintenance Kit, you may use a clean swab dipped in 99.7% isopropyl alcohol. Allow the solvent to evaporate

While manually rotating the platen roller, clean it thoroughly with the swab. Allow the solvent to evaporate

Use the swab to remove excess adhesive from the tear-off/peel-off bar. Allow the solvent to evaporate

Reload the media through the peel mechanism. For instructions, see Using Peel-Off Mode (with or without Liner Take-Up) on page 42

Warning: Only trained personnel should perform this procedure.

Check if the printhead and platen roller are worn out.

If components are worn out, proceed with the following steps.

Select the component to be replaced

Enter the part number of the replacement part.

Are the old components recyclable?

If components are recyclable, follow the local regulations for recycling.

Warning: Turn off and unplug the printer before cleaning.

Exterior of the printer cleaned with a lint-free cloth and mild detergent

Media and ribbon paths cleaned from paper lint and dust

Sensors cleaned from paper lint and dust

Sign off on the cleaning procedure

If the ribbon did not run out, cut or break the ribbon before the ribbon take-up spindle.

Turn the ribbon release knob to the left until it stops.

After the ribbon release bars have pivoted down, turn the ribbon take-up spindle one full turn to the right.

Slide the used ribbon off the ribbon take-up spindle and discard.

Sign off on the ribbon replacement

Warning: This procedure requires trained personnel with PPE!

Open the printhead assembly by rotating the printhead-open lever upward

Remove the ribbon (if used) and the media

Using the swab from a Zebra Preventive Maintenance Kit, wipe along the brown strip on the printhead assembly from end to end. In place of the Preventive Maintenance Kit, you may use a clean swab dipped in 99.7% isopropyl alcohol. Allow the solvent to evaporate

While manually rotating the platen roller, clean it thoroughly with the swab. Allow the solvent to evaporate

Reload the ribbon (if used) and the media. For instructions, see Loading the Ribbon on page 64 or Loading the Media on page 35

Rotate the printhead-open lever downward until it locks the printhead in place

Close the media door. The printer is ready to operate