HP Enterprise 500 manual Developing roller engagement and disengagement

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 1-22Developing-roller engagement and disengagement control

Four developing units engaged

Y

Y M

M C

C K

K

Only the Bk developing unit engaged

Y

Y M

M C

C K

K

Four developing units disengaged

Y

Y M

M C

C K

K

ENWW Image formation system 29