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bizhub C4000i/C3300i
[2]
[1]
Fusing section
1.14 IMAGE STABILIZATION CONTROL
1.14.1 Overview
• The machine provides the following image stabilization control to ensure stabilized print image.
Purpose
To stabilize image density
To stabilize gradation
To stabilize toner density
To stabilize image transfer
• *: Refer to descriptions concerning control of each section.
Toner supply motor
PH temperature
sensor
Color shift
correction
TCR sensor
Toner supply control
OUT/IN
· To be set on operation panel
D MAX density
Background voltage margin
Toner supply
1.14.2 Description of control
(1) IDC sensor adjustment control
• Controls changes in characteristics due to change with time and contamination of the transfer belt and IDC sensor, part-to-part variations
in the sensors, and change of environment.
• The intensity (current value) of the IDC sensor is adjusted on the surface of the transfer belt, on which no toner sticks (background level).
• IDC sensor adjustment control
• Max. density adjustment control
• LD intensity adjustment control
• Registration control (color shift correction) *
• Gamma correction control
TCR control (Y,M,C,K) *
• Transfer output control *
• 2nd transfer ATVC
PC
PC
PC
drum
drum
drum
Y
M
C
Developing bias Vdc
Grid voltage Vg
Image density
Gradation control
Gamma correction data
Gradation correction table
Temperature/
humidity sensor
P THEORY OF OPERATION > 1. bizhub C4000i/C3300i
[2]
Machine cooling fan motor (FM2)
Control
2nd transfer roller
PC
drum
K
IDC sensor
Transfer ATVC control
IN
OUT
P-54
[1]
Control means
• IDC sensor
• Temperature/humidity sensor
• PH temperature sensor
TCR sensor
Temperature/humidity sensor
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