Chapter 4 — Troubleshooting and Maintaining the Printer
PM4i Mid-Range Printer User’s Manual 99
2 Loosen the nut that secures the pressure arm.
3 Move the pressure arm inward or outward until the arrow on the
tip of the arm is centered with the media.
4 When the pressure arm is centered, tighten the nut to secure the
arm.
5 Adjust the edge guides.
Adjusting the Label Stop Sensor
The label stop/black mark sensor (LSS) is a photoelectric sensor that
controls the printer’s media feed by detecting gaps between labels, or
slots or black marks in continuous stock, depending on the printer’s
media type setup. The LSS must be aligned with the gaps, slots, or
black marks. If you are using irregularly shaped labels, align the LSS
with the front tips of the labels.
Upper label
stop sensor
Pressure arm
Center of media
Edge guide
Note: Move the pressure arm at the part closest to the screw, not at
the tip. If the arm is difficult to move, lift the printhead and pull
the printhead bracket free from the magnet in the arm.
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