Xerox AltaLink B8145 Series User Manual page 252

Maintenance
c. Place the removed waste toner transport unit on a level surface, with the openings facing up.
C C a a u u t t i i o o n n : :
To avoid toner spills, do not lay the waste toner transport unit face down, or on its side.
3. To unlock the drum cartridge, turn the orange lever to the right.
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Xerox ® AltaLink ® B8145/B8155/B8170 Series Multifunction Printer User Guide