Chapter 5
5-19
Advise the user to clean the area where the CCD stops in stream reading if the message has appeared.
SERVICE MODE:
COPIER>OPTION>BODY>DFDST-L1 (level 1)
use it to adjust dust detection level between sheets
COPIER>OPTION>BODY>DFDST-L2 (level 1)
use it to adjust dust detection level at the end of a job
5.3.5.3 White Plate Dust Detection Control
0011-2231
The white plate can collect stray dust inside the reader unit, causing lines in images, and the machine is
equipped with a mechanism to check for dust on the plate and correct it to limit its effects on output images.
Timing of Control
1. Before a Job
- white plate dust detection
- white plate dust correction
2. After a Job
- white plate dust detection
- white plate dust correction
F-5-41
Particulars of Control
- White Plate Dust Detection
The machine compares the data on the light reflected by the white plate at time of fixed shading and shift
shading to check for dust on the white plate while at the same time identifying the coordinates and width
of the area of dust.
- White Plate Dust Correction
If the machine detects the presence of dust, it corrects the shading correction coefficient of the area of dust
by means of a correction coefficient used for both sides of the area with dust, thus limiting the effects of
the dust.
F-5-42
Dust detection control
Dust detection control
Start key
ON
1st
SCAN
2nd
SCAN
Correction Algorithm
Data on light reflected
by the white plate
(shift shading))
Data on light reflected
by the white plate
(fixed shading)
Identifies the coordinates
of the start of dust and width
The machine corrects the correction
coefficient of the area of dust using data
for areas on both sides
Point of white plate data
measurement at time of fixed shading
White plate data correction
area at time of shift shading
White plate
Dust
Comparison
Summary of Contents for IMAGERUNNER 7095 PRINTER
Page 20: ...Chapter 1 Introduction...
Page 46: ...Chapter 2 Installation...
Page 88: ...Chapter 3 Basic Operation...
Page 94: ...Chapter 4 Main Controller...
Page 116: ...Chapter 5 Original Exposure System...
Page 165: ...Laser Exposure Chapter 6...
Page 175: ...Chapter 7 Image Formation...
Page 231: ...Chapter 8 Pickup Feeding System...
Page 287: ...Chapter 9 Fixing System...
Page 312: ...Chapter 10 External and Controls...
Page 346: ...Chapter 11 MEAP...
Page 350: ...Chapter 12 RDS...
Page 360: ...Chapter 13 Maintenance Inspection...
Page 375: ...Chapter 14 Standards Adjustments...
Page 407: ...Chapter 15 Correcting Faulty Images...
Page 433: ...Chapter 16 Self Diagnosis...
Page 460: ...Chapter 17 Service Mode...
Page 559: ...Chapter 18 Upgrading...
Page 583: ...Chapter 19 Service Tools...
Page 588: ...APPENDIX...
Page 615: ......