Chapter 3— Maintaining the Printer
38 3400, 3440, and 3600 Bar Code Label Printer User’s Manual
Cleaning the Label Sensors
Three label sensors on the printer require regular cleaning:
• Label taken sensor
• Label mark sensor
• Label gap sensor
To clean the label sensors
1 Turn the On/Off switch to the off position and remove the power cord.
2 Remove the media cover.
3 Rotate the head lift lever clockwise to release the printhead. Rotating the
head lift lever raises the printhead to allow access to the label mark
sensor.
4 Remove the media and ribbon (if necessary).
5 Clean the label taken sensor with a cotton swab moistened with
isopropyl alcohol.
3XXXU.036
Label gap
sensor
Label mark
sensor
Label taken
sensor
Drive
roller
Cotton
swab
Cleaning
brush
Upper media
guide
(underside)
Lower
media guide
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