M-Class 85
6.5 Printhead Replacement
To replace a damaged printhead, follow the procedure below.
Note: Printheads are fragile; use extreme care when handling and never use a sharp object on the surface. If you have questions,
contact a qualified technician or Datamax
Technical Support before proceeding.
1. Touch a bare metal part of the printer’s frame to discharge any
static electricity that may be present on your body.
2. Turn ‘Off’ and unplug the printer. Open the cover; if ribbon is
installed, remove it.
3. With the printhead locked in the down position, loosen the
Printhead Mounting Screw (it will remain in the assembly).
4. Unlatch the Printhead Assembly. While holding the Printhead,
raise the assembly. Disconnect the two cables and then remove the
old Printhead.
5. While carefully holding the new Printhead, connect both cables.
6. Position the Printhead onto the Locating Pins in the Printhead
Assembly and secure in place with the Printhead Mounting Screw
(do not over-tighten).
7. Clean the Printhead (see Section 6.1).
8. Reload ribbon (if removed), lower the printhead assembly, and rotate the printhead latch back, into the locked
position.
9. Use the Darkness Adjustment to match the print contrast of the new printhead to that of the old printhead (for non-
display printers see Section 6.6 for display printers see Section 5.1.3).
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