Chapter 4
4-6
F-4-6
4.3 Various Control
4.3.1 Enlargement/Reduction
4.3.1.1 Magnification Change in Vertical Scan Direction
0016-7818
In the main scan direction, the image is read at 100%. Magnification is changed by processing data on the image processor PCB.
4.3.1.2 Magnification Change in Horizontal Scan Direction
0016-7819
In the horizontal scan direction, the document feed speed is changed depending on the magnification rate whether or not the image is enlarged or reduced. When
the magnification rate is 100% copy, the speed is 78.66 mm/sec. Data is not processed by the image processor PCB.
4.3.2 Dirt Sensor Control
4.3.2.1 Outline
0016-7820
The machine changes the document read position or corrects the read image depending on the presence/absence of dust on the stream reading glass or ADF platen
guide, thus preventing dust from showing up in the image.
[Control Timing]
- At job end
F-4-7
[Description of Control]
- At job end
The contact image sensor (CIS) checks the light reflected by the ADF platen guide surface at the read position for presence/absence of dust.
After job end, presence/absence of dust is detected three times. First presence/absence of dust is detected at position A. If no dust is detected at position A, presence/
absence of dust is detected twice. If no duct is detected three times, the document is read at position A. If duct is detected at position A, presence/absence of dust
is detected at B twice. If no duct is detected at position B, the document is read at position B. If dust is also detected at position B, presence/absence of dust is
detected at position C once. If dust is also detected at position C, the relevant message is displayed on the operation panel. If dust is also detected at position C, the
sensor returns to position A and the document is read.
If dust is detected a all positions A, B, and C at job end, a message prompting to clean the glass surface appears on the operation panel.
1.black shading/
white shading/
Original scan
CIS HP
sensor
HP
Stream reading
start position
Shading
position
Main power
switch
ON
Dust detection control
Dust detection control
STBY
WAIT
Start key
ON
1st
SCAN
2nd
SCAN
Dust detection control
Summary of Contents for Laser Class 810
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Page 18: ...Contents...
Page 19: ...Chapter 1 Introduction...
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Page 55: ...Chapter 1 1 33...
Page 56: ......
Page 57: ...Chapter 2 Installation...
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Page 77: ...Chapter 3 Basic Operation...
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Page 87: ...Chapter 3 3 7...
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Page 89: ...Chapter 4 Original Exposure System...
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Page 105: ...Chapter 5 Original Feeding System...
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Page 126: ...Chapter 5 5 18...
Page 127: ...Chapter 6 Laser Exposure...
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Page 135: ...Chapter 7 Image Formation...
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Page 145: ...Chapter 8 Pickup and Feed System...
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Page 161: ...Chapter 9 Fixing System...
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Page 175: ...Chapter 10 External and Controls...
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Page 180: ...Chapter 10 10 2 F 10 2 FM2000 FM1...
Page 197: ...Chapter 11 e Maintenance imageWARE Remote...
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Page 211: ...Chapter 12 Maintenance and Inspection...
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Page 217: ...Chapter 13 Measurement and Adjustments...
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Page 227: ...Chapter 14 Correcting Faulty Images...
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Page 236: ...Chapter 14 14 6 F 14 3 12 6 5 11 3 14 1 10 9 8 7 16 13 15 4 2...
Page 238: ...Chapter 14 14 8...
Page 239: ...Chapter 15 Error Code...
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Page 249: ...Chapter 16 Service Mode...
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Page 256: ...Chapter 16 16 2...
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Page 305: ...Chapter 17 Upgrading...
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Page 315: ...Chapter 18 Service Tools...
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Page 317: ...Contents Contents 18 1 Service Tools 18 1 18 1 1 Special Tools 18 1...
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Page 321: ...Mar 26 2010...
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