Paxar Monarch 9855 Operator's Handbook Manual page 92

7. Rub the cotton swab across the supply sensor and die cut
sensor and remove any build-up.
8. Clean the build-up in the supply path.
9. Let the printer dry before you reload supplies.
10. Close the exit cover by pushing firmly on it. Both latches will
click into place.
11. Close the cover and printhead assembly.
12. Turn on the printer.
13. Press Feed/Cut to position the supply under the printhead.
Resend your format, batch, and check digit packets.
9-4 Care and Maintenance
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Die Cut Sensor
Supply Sensor