Lexmark C78x Service Manual page 308

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Remove the three printhead mounting screws (H), and remove the printhead.

Lift the old printhead out, leaving the printhead alignment assemblies in place.

Note: Untwist the printhead motor cables before placing the printhead assembly into the printer.

Install the new printhead assembly, reconnect the printhead motor cable into the system board, and

reconnect the color keyed printhead cable into the top of the printhead.

Note: Replace the printhead mounting screws, but do not tighten them yet.

Service Manual