Image Stabilization Control - Epson AcuLaser C9200N Service Manual

EPSON AcuLaser C9200N

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.
Table 2-10. Image stabilization control
Purpose
To stabilize image density • IDC intensity control
To stabilize gradation • Max. density control
• LD intensity adjustment Control
• Registration control (color shift
• Gamma correction control
To stabilize toner density TCR Control (Y,M,C,K)
To stabilize image transfer Image transfer output control
• 1st image transfer auto transfer
• 2nd image transfer auto transfer
Note *1: Refer to Registration Control (Color Shift Correction) System
*2: Refer to TCR Sensor control
*3: Refer to Auto Transfer Voltage Control
OPERATING PRINCIPLES
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Control
IDC/Registration Sensor
Temperature/Humidity
Sensor
*1
correction)
*2
TCR Sensor
*3
Temperature/Humidity
Sensor
voltage control
voltage control
(p50).
(p61).
Operating Principle of Main Unit Mechanism
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2.2.16.2 Operation timing
Mode
Mode 1
Initialized
stabilization
Mode 2
Periodical
Control Means
stabilization
Mode 3
Normal
stabilization
(p40).
Table 2-11. Image stabilization control
Operation timing
• 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.
The number of prints made predetermined counts after the previous image
stabilization (mode 1, 2, 3).
• 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
detected.
• When the print job is completed, environment (temperature/humidity)
change that exceeds threshold is detected after the previous stabilization
(mode 1, 2, 3).
Revision D
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