Primary charging
bias circuit
Developing bias
circuit
Blade bias circuit
Photosensitive drum
Primary transfer pad
Cartridge
Secondary transfer
external roller
ITB
cleaning unit
Primary transfer
bias circuit
Secondary transfer
bias circuit
ITB cleaning brush
bias circuit
ITB cleaning roller
bias circuit
High-voltage power supply
DC controller
■ Image stabilization control
● Overview
This product controls image stabilization to avoid faulty images due to environmental changes, deteriorated photosensitive drum
or toner, etc. The controls listed in the table below are executed when needed to stabilize image quality.
Control Description
D-max control Correct values of the primary charging bias and/or developing bias based on signals from the environ-
ment sensor.
D-half control Correct the gradation data in the main controller PCB based on signals from the color displacement /
density sensor.
Color displacement correction
control
Correct the video signal output timing based on signals from the color displacement / density sensor.
Auto-gradation correction con-
trol
To stabilize the image gradation density characteristics, users execute full or quick correction, or copy
image correction.
2. Technical Explanation
36
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