Print cartridges
The printer has four different print cartridges, one for each color. However, they share the
same structure, shown in
Figure 5-14. Print cartridge.
Figure 5-14.
Print cartridge
The physical components inside the print cartridge are the following:
●
photosensitive drum
●
primary charging roller
●
developing cylinder
●
toner charging roller
●
stirrers
●
waste toner transfer plate
The photosensitive drum’s rotation drives the primary charging roller. All other components
are driven by the drum motor.
The developing disengaging motor drives the developing disengaging block, which causes
the developing cylinder to engage with or disengage from the photosensitive drum.
The DC controller uses an LED and a photo diode to monitor the level of toner inside the
cartridge. It stores this information on a memory tag built into each cartridge.
The primary charging roller and the toner charging roller are cleaned at the start of each print
operation to avoid image defects.
ENWW Image formation system 149
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