User`s manual

Chapter 6 — Maintain the Printer
PM43 and PM43c Mid-Range Printer User Manual 97
Adjust the Label Gap and Black Mark Sensor
The label gap sensor is a transmissive sensor that controls how the
printer feeds media by detecting gaps between the labels. The black
mark sensor is a reflective sensor that detects black marks on
continuous media.
The sensor contains a blue LED which is strong enough to see through
media. You can use the blue LED to help determine the proper location
for the sensor.
1 Open the media cover.
2 Adjust the label gap and black mark sensor:
Turn the sensor adjustment knob counterclockwise to move
the sensor toward the outside of the printer.
Turn the sensor adjustment knob clockwise to move the sensor
toward the inside of the printer.
3 Close the media cover.