HP LaserJet Enterprise M552 - Cartridge Authentication Technology (CAT)

Figure 1-25 Developer roller engagement and disengagement control
Developing unit is disengaged
Developing
disengagement
motor
Photosensitive drum
Developing unit
Developing disengagement cam
SR4
Developing home position sensor
DC controller
M6
Developing unit is engaged
The developer roller engagement and disengagement control operates as follows: When the printer is turned
on and when each print job is completed, all four of the developing units are disengaged from the
photosensitive drums.
●
The drive of the developer disengagement motor rotates the developer disengagement cam.
●
As the cam rotates, the developing unit engages with or separates from the photosensitive drum.
When the print mode is full color, the developing units engage with the drums. When the print mode is black-
only, only the black developing unit engages with the drum.
The DC controller determines a developer disengagement motor failure and noties the formatter when it
does not detect a specied signal from the developer disengagement sensor during the developing unit
engagement and disengagement operation.
Cartridge Authentication Technology (CAT)
CAT supports two features for managing toner cartridges.
●
The authentication feature allows customers to specify the use of only genuine HP toner cartridges in
the printer.
●
The anti-theft feature enables locking a cartridge to a specic printer or eet of printers.
ENWW Engine laser/scanner system 43