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Technical Explanation > Image Formation System > Controls > Image Stabilization Control
Technical Explanation > Image Formation System > Controls > Image Stabilization Control
NOTE:
Short pattern is normally used as the patch pattern used when performing color
displacement correction.
Long pattern is used only in the following cases:
• When Adjustment/Maintenance > Adjust Image Quality > Auto Correct Color Mismatch is
executed
Correction description:
Type of control
Correction description
Correction in horizontal
scanning direction
Write start correction
Write-start timing in horizontal scanning direction is
changed.
Overall magnification
ratio correction
Pixels in horizontal scanning direction is increased/
reduced (at the both edges of the image)
Correction in vertical
scanning direction
Write start correction
Write-start timing in vertical scanning direction is
changed.
Image skew correction Image data is corrected.
Related Alarm Code: There is no color displacement alarm for Y because Y is the
reference for the laser light.
34-0003 : Auto registration adjustment
34-0024 : The correction value (M) of the write start position in the vertical scanning
direction exceeded the upper limit during color fine adjustment
34-0026 : The correction value (M) of the write start position in the horizontal scanning
direction exceeded the upper limit during color fine adjustment
34-0034 : The correction value (C) of the write start position in the vertical scanning
direction exceeded the upper limit during color fine adjustment
34-0036 : The correction value (C) of the write start position in the horizontal scanning
direction exceeded the upper limit during color fine adjustment
34-0044 : The correction value (Bk) of the write start position in the vertical scanning
direction exceeded the upper limit during color fine adjustment
34-0046 : The correction value (Bk) of the write start position in the horizontal scanning
direction exceeded the upper limit during color fine adjustment
34-2201 : As a result of wrong detection processing, data that can be used for
correction in the vertical scanning direction was not found (M)
34-2211 : As a result of wrong detection processing, data that can be used for correction
in the horizontal scanning direction was not found (M)
34-2301 : As a result of wrong detection processing, data that can be used for
correction in the vertical scanning direction was not found (C)
34-2311 : As a result of wrong detection processing, data that can be used for correction
in the horizontal scanning direction was not found (C)
34-2401 : As a result of wrong detection processing, data that can be used for
correction in the vertical scanning direction was not found (Bk)
34-2411 : As a result of wrong detection processing, data that can be used for correction
in the horizontal scanning direction was not found (Bk)
T-2-33
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Patch Sensor Adjustment
Purpose: To perform correction of the Patch Sensor light intensity and sampling of the ITB
background.
Configuration of the Patch Sensor
The light produced by the LED is reflected from the patch image and detected by the light-
receiving element.
There are two types of waves that are P wave and S wave, and the light intensity is detected
by the light-receiving element.
Patch Sensor
Light-receiving element
Light-emitting element
P-wave :
S-wave :
Patch image
Light intensity adjustment
The light intensity of the Patch Sensor is changed sequentially and adjusted such that the P
wave output is 2.5 V.
Sampling of the ITB background
To prevent uneven reflection in the inner circumference of the ITB, the background of the
whole circumference of the ITB is sampled by the Patch Sensor without forming patches.
The patch image that is read is compared with the sampling results of the ITB background to
read the density.
Related Service Mode:
COPIER > DISPLAY > DENS > P-B-P-Y : Dspl ITB rear side base intnsty (Pwave)
COPIER > DISPLAY > DENS > P-B-P-C : Dspl ITB front side base intnsty (Pwave)
COPIER > DISPLAY > DENS > P-B-S-Y : Dspl ITB rear side base intnsty (Swave)
COPIER > DISPLAY > DENS > P-B-S-C : Dspl ITB front side base intnsty (Swave)
F-2-61