Chapter 4 — Troubleshooting and Maintaining the Printer
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To clean the printhead
1 Turn off the printer.
2 Open the front door and media cover.
3 Turn the printhead lift lever counter-clockwise to raise the
printhead.
4 Remove any media and transfer ribbon.
5 Open the cleaning card envelope and pull out the cleaning card.
Read the warning text.
PX4i and PX6i High Performance Printer User's Manual