Epson AcuLaser C9200N Service Manual page 40

EPSON AcuLaser C9200N
REGISTRATION CONTROL (COLOR SHIFT CORRECTION) SYSTEM
In a tandem engine, in which an independent image reproduction process is
provided for each of the four different colors of toner. Incorrect color
registration, or color shift, is therefore more likely to occur due to each of
the PH Units being out of correct position. The color shift correction
system automatically detects any misalignment among the different colors,
correcting it both in the main scanning and sub scanning directions.
The color shift correction is made when the Front Door is opened and
closed, the Transfer Belt is removed and reinstalled, the Main Power
Switch is turned OFF and ON, or "Calibration" is carried out from the
Control Panel.
Transfer Belt
Figure 2-8. Registration Control (Color Shift Correction) System
OPERATING PRINCIPLES
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IDC/Registration Sensor/1 and /2
(SE1, SE2)
Operating Principle of Main Unit Mechanism
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SKEW CONTROL MECHANISM
When the PH Unit is mounted on the main body installation plate, image
distortion (skew) occurs due to mounting error. Therefore the PH Unit
adopts the correction system.
Figure 2-9. Skew Control Mechanism 1
The main body skew can be corrected by adjusting the dial of the
corresponding PH Unit (Y, M, C).
Figure 2-10. Skew Control Mechanism 2
Revision D
4038T2C033DA
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