Troubleshooting guide

Airport Bag Tag Printers Unimark 8500 Bag Tag Printer

2.4.2 Replacing the Thermal Print Head

To replace the 8500’s thermal print head, complete the following steps:

5 Lift the print head to the upright position.

6 Clean the print head heater element surface using isopropyl alcohol. Verify that all label stock,

media residue, and any other contaminants are cleared from the print head.

Note: The printer in this photo is equipped with the newer style print head, with an extra

attached ribbon cable. See “New Print Head” on page 40.

7 Lower the print head assembly, making sure to securely latch it back into position.

8 Lower the printer’s cover, plug the AC power cord into a power source, and turn on power to

the printer.

9 Reload paper stock.

Step Action

1 Power off the unit. Unplug the unit’s AC power cable from the power source.

2 Open the printer’s cover by pressing the cover release button.

3 After the cover pops open, lift the cover to the full upright position.

Step Action (Continued)

Raised Print Head