HP 0706124 REV B manual Iii

Caution SEVERE DAMAGE TO THE PRINTHEAD CARRIAGE CIRCUIT BOARD AND PRINT- HEAD WILL OCCUR IF A PRINTHEAD IS REMOVED WHILE POWER IS SUPPLIED TO

THE PRINTHEAD. Repairing this damage will require a service call and replacement of the print- head carriage circuit board and printhead at cus- tomer expense.

To avoid electrical damage to the printhead carriage circuit board and printhead:

Follow the instructions in the DisplayMaker Mach 12 User Manual to replace printheads.

DO NOT remove any printhead without first pressing the Carriage or Prime keys on the control panel. Pressing the Carriage key will move the printhead carriage to the center of the platen; pressing the Prime key will move the carriage out of the service station to the prime position. Pressing either key will cut power to the printheads, allowing you to safely remove and replace printheads.

DO NOT disable the “cover open” switches on the top cover or prime access door. When the printer detects that either of these doors is open, it cuts power to the printheads, making it safe to remove and replace printheads. If these switches are dis- abled, the printer can no longer detect whether the doors are open, making electrical damage more likely.

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