Datamax-O'Neil A-Class Mark II Operator’s Manual - Manual (Page 96)

86 A-Class Mark II
5. Tighten the Locking Screws until ‘snug’ (that is, tight enough to remove any play in the
printhead assembly, yet loose enough to allow the Adjustment Screws to move the printhead).
6. Turn each Adjustment Screw clockwise about a ¼ turn (and 1/8 a turn for finer adjustments).
Typically, thick media requires a slight forward adjustment, while thin media requires a
backward adjustment. Print another Validation Label and examine the print quality. Repeat Step
6 (see note below) until labels are produced that meet conformance as well as aesthetic
standards.

When the Locking Screws are ‘snug’, turning the Adjustment Screws counterclockwise
will NOT move the printhead outward. If the printhead is adjusted too far inward,
restart the entire procedure beginning at Step 2.
7. Tighten the Locking Screws. Print a final Validation Label to verify the adjustment.
5.4 Printhead Replacement
• Use extreme care when handling the printhead; wear a wrist strap and follow
standard ESD prevention procedures.
• (2) If 24V OUT OF TOLERANCE is displayed (see Section 6.1.2), contact a
qualified technician or Datamax-O’Neil Technical Support before proceeding.
Replace the printhead as follows:
1. Turn OFF the printer. Raise the Access Cover.
2. Touch a bare metal part of the printer’s frame to discharge any static electricity that may be
present on your body. Unplug the printer.
3. With the Printhead Assembly in the down position, loosen the Captive Screw(s). The following
drawings highlight the location of Captive Screws according to printer model: