The DC controller notifies the formatter of an error if any of the following conditions exist:
●
The memory tag fails to either read to or write from the DC controller
●
The RD sensors detect a missing or incorrectly installed print cartridge.
●
The accumulated print time reaches a specified time period or the cartridge runs out of toner.
●
The toner level in any of the print cartridges drops below a certain level
Developing-roller engagement and disengagement
The product can print in full-color mode or in black-only mode. To print in black-only mode, the product
disengages the developing rollers in the cyan, magenta, and yellow print cartridges. This maximizes the
life of the cartridges.
Figure 5-22 Developing-roller engagement and disengagement control
Four developing units engaged
Only the Bk developing unit engaged
Four developing units disengaged
Y
M
C
K
Y
M
C
K
Y
M
C
K
Y
M
C
K
Y
M
C
K
Y
M
C
K
The DC controller rotates the developing disengagement motor and changes the direction of the cam
according to the instructions from the formatter for each print job.
ENWW Image-formation system 141
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