2-12
Phaser 7500 Printer Service Manual
Theory of Operation
Primary Transfer (Drum --> Belt)
The 1st BTR (First Bias Transfer Roll) is used to transfer the toner image on the
Drum surface onto the belt. The toner images are transferred from the Drums onto
the belt in the order of Y, M, C, K.
•
The 1st BTR is a metal roll that is energized with positive DC voltage from the
HVPS. The 1st BTR contacts the underside of the belt, where it generates a
potential through the resistance of the belt, and transfers the positive charges
to the underside of the belt.
The negatively charged toner image on the Drum surface is attracted to the
positive charge on the underside of the belt and gets transferred from the
Drum to the belt.
Belt
HVPS
1
s
t BTR (C)
1
s
t BTR (M)
1
s
t BTR (Y)
1
s
t BTR (K)
s
7500-347
Summary of Contents for PHASER 7500
Page 1: ...Phaser 7500 Color Printer Phaser 7500 Service Manual Xerox Internal Use Only ...
Page 2: ......
Page 60: ...1 30 Phaser 7500 Printer Service Manual General Information ...
Page 448: ...3 310 Phaser 7500 Printer Service Manual Error Messages and Codes ...
Page 484: ...4 36 Phaser 7500 Printer Service Manual General Troubleshooting ...
Page 544: ...5 60 Phaser 7500 Printer Service Manual Print Quality Troubleshooting ...
Page 545: ...6 Chapter Adjustments and Calibrations In this chapter Adjustments Calibrations ...
Page 554: ...6 10 Phaser 7500 Printer Service Manual Adjustments and Calibrations ...
Page 562: ...7 8 Phaser 7500 Printer Service Manual Cleaning and Maintenance ...
Page 900: ...9 118 Phaser 7500 Printer Service Manual Parts List ...
Page 958: ...10 58 Phaser 7500 Printer Service Manual Plug Jack and Wiring Diagrams ...
Page 980: ...11 22 Phaser 7500 Printer Service Manual Reference ...
Page 990: ...I 10 Phaser 7500 Printer Service Manual Index ...
Page 991: ......