Epson Aculaser C9200N - Image Stabilization Control

EPSON AcuLaser C9200N Revision D
OPERATING PRINCIPLES Operating Principle of Main Unit Mechanism 82
Confidential
2.2.16 Image stabilization control
Stabilizes printed images by adjusting developing bias potential and laser
intensity. Also, to prevent color misalignment, control the registration
correction.
2.2.16.1 Overview
The machine provides the following image stabilization control to maintain the
printed image quality.
Note *1: Refer to Registration Control (Color Shift Correction) System (p40).
*2: Refer to TCR Sensor control (p50).
*3: Refer to Auto Transfer Voltage Control (p61).
2.2.16.2 Operation timing
Table 2-10. Image stabilization control
Purpose Control Control Means
To stabilize image density
To stabilize gradation
• IDC intensity control
• Max. density control
• LD intensity adjustment Control
• Registration control (color shift
correction)
*1
• Gamma correction control
IDC/Registration Sensor
Temperature/Humidity
Sensor
To stabilize toner density TCR Control (Y,M,C,K)
*2
TCR Sensor
To stabilize image transfer Image transfer output control
*3
• 1st image transfer auto transfer
voltage control
• 2nd image transfer auto transfer
voltage control
Temperature/Humidity
Sensor
Table 2-11. Image stabilization control
Mode Operation timing
Mode 1
Initialized
stabilization
• A new PU is detected.
• A new transfer belt unit is detected.
• "Calibration" of the Printer Adjust Menu is executed from the operation
panel.
• Empty is released.
• Previous image stabilization is failed.
Mode 2
Periodical
stabilization
The number of prints made predetermined counts after the previous image
stabilization (mode 1, 2, 3).
Mode 3
Normal
stabilization
• Power switch is turned ON, right cover is opened and closed (only when
PU and transfer belt are new), front door is opened and closed, the DEEP
SLEEP mode is released, panel displays stabilization mode.
• The number of prints made predetermined counts after the previous image
stabilization (mode 1, 3).
• When the number of prints made predetermined counts after the previous
image stabilization (mode 1, 2, 3), temperature change that exceeds
threshold is detected.
• When the number of prints made predetermined counts after the previous
image stabilization (mode 1, 2, 3), environment (temperature/humidity)
change that exceeds threshold is detected.
• When the print job is completed, given level of temperature change
*
is
detected.
• When the print job is completed, environment (temperature/humidity)
change that exceeds threshold is detected after the previous stabilization
(mode 1, 2, 3).