Customer Replaceable Consumable Detection; Customer Replaceable Consumable (Crc) Life Counter Behavior - Xerox 7300B - Phaser Color Laser Printer Service Manual

Customer Replaceable Consumable Detection

The new/replace condition of units is judged on whether a "blown" fuse is detected in
the unit. If the fuse of a unit is intact, the unit is recognized as a new one. This
determination is made when the printer is turned on and when its cover is closed.
Finding a new unit, the printer resets the life counter of the unit and blows
(overcurrents) the fuse for version detection. The count will not indicate it has been
reset until two pages have been printed.

Customer Replaceable Consumable (CRC) Life Counter Behavior

Internal counters track Customer-Replaceable Consumable (CRCs) life usage and
store the values on the Engine Controller Board EEPROM. The image processor
board stores the pixel count information in NVRAM and monitors these counters in
order to display the consumable near end-of-life and at end-of-life messages.
The toner states displayed are OK, Low, and Empty. When an empty state is reached,
the printer terminates printing at the end of the current page and displays the
appropriate message on the Front Panel. No further jobs are accepted. All printer
CRCs wait for the current print job to finish before declaring a Low or Empty state.
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