Determining The Developing Bias - Canon iR5000i Service Manual

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2.4 Determining the Developing Bias

The developing bias (Vdc) is determined as follows based on the drum surface potential

Vdc = VL2 + Vdc

In terms of copying potential, Vdc = 110 V

In terms of printing potential, Vdc = 85 to 110 V

(The potential for printing varies in keeping with the reading of the environment sensor to

ensure the reproduction of appropriate line widths.)

Potential sensor

Primary charging

Selected potential

Fixing assembly temperature 195

Primary current

level determined

Potential control sequence start

2000 2000 2000 2000

CANON iR5000i/iR6000i REV.0 JUNE 2001

CHAPTER 4 IMAGE FORMATION SYSTEM

Potential sensor

Photosensitive drum

Laser output

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Ir6000i Image reader-a1