Electric Charge (Drum) - Xerox Phaser 7500 Service Manual

Theory of Operation

Electric Charge (Drum)

Imaging Unit (PL8.1.4)
Erase Lamp Unit (PL8.1.5)
2-30
CRUM
Drum
Cleaning Blade
The Drum unit forms electrostatic latent images and toner images. One is for each
color - Yellow, Magenta, Cyan, and Black.
Other than the Drum itself, it is made up of the following main components.
• BCR - Charges the Drum.
Cleaning Blade - Cleans any toner remaining on the Drum after the transfer
•
of toner image onto the paper.
CRUM - This is a non-volatile memory that stores the machine data.
•
The Erase Lamp Unit photoelectrically discharges the Drum surface after the toner
image has been transferred onto the Transfer Belt. One is allocated to each color -
Yellow, Magenta, Cyan, and Black.
Erase Lamp Unit
BCR
Phaser 7500 Printer Service Manual
s7500-367