User manual

95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–57
Stage 5: Transfer Drum Cleaning and Discharge
After the page has left the transfer drum, the printer must return the
drum to a clean and electrically neutral state.
Step 9:
Transfer Drum
Cleaning
During density calibration and after some paper jams, unfused toner
may find its way onto the surface of the transfer drum. The transfer
drum cleaning brush is designed to scrape this residual toner off the
transfer drum. This function takes place following density calibration
and following the opening/closing of any of the doors. It also occurs as
a routine maintenance measure after every 100 prints.
Collected toner is deposited in the filter of the transfer drum cleaner.
The cleaning brush is normally separated from the transfer drum.
When the transfer process terminates and the paper leaves the transfer
drum, the cleaning brush makes contact with the drum, cleans the
surface, then separates from the drum.
Note: For more information, see “Transfer Drum Cleaning Assembly”
in the “Pickup/Feed System” section of this chapter.
Example: The transfer drum cleaning assembly presses against the
transfer drum in frame 223 of the animation, just after the trailing edge
of the paper has passed. The assembly separates from the drum in
frame 274. As noted above, this press and separation of the cleaning
drum assembly occurs in this way only once in 100 prints.
Sound: The transfer drum cleaning assembly has a very distinctive
whining type sound. Click the icon to the left to hear a sampling of this
sound.
Transfer Drum
Cleaning Brush
(Motorized Rotation)
Transfer Drum
Cleaning Assembly
Animation
Sound