System Control - Xerox Phaser 6121MFP Service Manual

Theory of Operation

System Control

2-4
6. Transfer Roller Cleaning
The residual toner left on the surface of the Transfer Roller is removed by an
alternating DC charge that transfers the waste toner back to the Transfer Belt
for collection by the Transfer Belt cleaning blade.
Transfer Belt
7. Transfer Belt Cleaning
A charge is applied to the Transfer Belt. By potential difference, residual toner
on the surface of the Transfer Belt is collected for cleaning. The toner scraped
off the surface of the photo conductor is collected in the Imaging Unit.
8. Fusing
Toner is permanently fused to the paper by the combination of heat and
pressure applied by the Fuser.
The following diagram shows the major operating components and their basic
connection to each other.
Scanner
Control Panel
FAX
Image Processor Board
Image Processing
Laser Unit
Control System Line
2nd Transfer Roller
s6121mfp-106
TC/Y TC/M TC/C TC/K
Engine Control Board
CPU
Image Bus Line
Phaser 6121MFP Service Manual
Paper Pick-Up/
Transport
Image Process
Fusing
Power Supply/
High Voltage
s6121mfp-280