Kyocera FS-5900C - Manual (Page 79)

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Care and Maintenance
When using the duplex unit, it may become necessary to clean the rollers inside the unit.
Open the internal cover, and wipe the rollers with a lint-free cloth steeped in isopropyl
alcohol.
Cleaning the home sensor
1 Open the printer’s front cover.
2 Remove the imaging unit:
(1) Loosen the two thumbscrews by turning them counterclockwise.
(2) Turn the lower green lever 180° counterclockwise.
(1)
(1)
(2)