Xerox VersaLink B7025 Service Manual page 1293

Drum Cartridge (Overview)
The drum cartridge is a customer replaceable unit (CRU) with a life expectancy of approxi-
mately 380 000 feeds. The machine will stop operation when end of life is reached and gener-
ate a fault code. A message on the UI will inform the customer to replace the cartridge.
The drum cartridge contains the following components:
• photoreceptor drum
• Bias charge roll (BCR)
• Developer roll
• Augers (supply and toner reclamation/cleaning augers)
• Automatic toner control (ATC) sensor
• Drum cartridge CRUM
Refer to Figure 5.
Drum cartridge
Figure 5 Drum cartridge CRU
Launch Issue
Xerox® VersaLink® B7025/B7030/B7035 Multifunction Printer
NOTE: The drum cartridge is a CRU and is not serviceable.
The drum cartridge is equipped with customer replaceable unit monitor (CRUM). A CRUM
monitors and stores information about the customer replaceable unit (CRU). The information
stored in the CRUM is used to:
• Monitor CRU usage (total number of copies/prints)
• Indicate how near the CRU is to the end of its life.
• Prevent the installation and use of an unauthorized or incorrect CRU (CRUM checks for
Xerox trademark on the CRU)
• Indicate that a new CRU has been installed
The CRUM consists of two components - a CRUM Tag and a CRUM PWB. The CRUM PWB
for the drum cartridge is mounted at the front of the cartridge. Refer to
Drum cartridge CRUM PWB
Figure 6 Drum cartridge CRUM
April 2017
8-47
Figure 6.
Product Technical Overview