COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 4 IMAGE FORMATION SYSTEM
4-7 P
2.6 Controlling the Detection of the Photosensitive Drum Re-
sistance (APVC control)
The primary charging efficiency changes because of changes in the site environment (tem-
perature, humidity), deterioration of the charging roller, and wear of the photosensitive
drum. A reference voltage is applied to the charging roller at time of last rotation every 500
prints (cumulative) or when the following service mode is executed:
COPIER>FUNCTION>DPC>D-GAMMA, and the level of output current at the time is
measured and corrected.
[1] When the main power switch is turned on, the reference voltage is applied to the charg-
ing roller, and the output is measured as the current level for use as feedback to the PW-
CPU.
[2] The photosensitive drum is charged (primary charging) using the voltage level deter-
mined by the PW-CPU.
If you have replaced the drum unit with a new one, be sure to execute the
following service mode: COPIER>FUNCTION>DPC>D-GAMMA.
Summary of Contents for iR2200 Series
Page 8: ......
Page 12: ......
Page 30: ......
Page 32: ......
Page 54: ......
Page 86: ......
Page 90: ......
Page 94: ......
Page 96: ......
Page 124: ......
Page 142: ......
Page 152: ......
Page 160: ......
Page 168: ......
Page 178: ......
Page 180: ......
Page 222: ......
Page 224: ......
Page 278: ......
Page 280: ......
Page 298: ......
Page 300: ......
Page 324: ......
Page 368: ......
Page 386: ......
Page 388: ......
Page 404: ......
Page 414: ......
Page 416: ......
Page 422: ......
Page 424: ......
Page 434: ......
Page 436: ......
Page 440: ......
Page 468: ......
Page 473: ......
Page 550: ......
Page 552: ......
Page 658: ......
Page 704: ......
Page 706: ......
Page 754: ......
Page 756: ......
Page 760: ......