
Chapter 4
4-1
4.1 Construction
4.1.1 Specifications, Control Methods, and Functions (When the original size detection sensor is equipped for BOOK mode)
0020-4219
Major specifications, control methods, and functions of the original exposure system are summarized below.
4.1.2 Specifications, Control Methods, and Functions (When the original size detection sensor is not equipped for BOOK
mode)
0020-4220
Major specifications, control methods, and functions of the original exposure system are summarized below.
Item
Function/Method
Exposure light source
LED
Original scan
In BOOK mode: Original scan is performed by moving the contact image sensor (CIS).
When ADF is used: Original stream reading is performed with the contact image sensor
(CIS) fixed.
Scan resolution
600 dpi (vertical scan) x 600 dpi (horizontal scan) (Color send: 300 dpi horizontal scan)
Gradation
256
Carriage position
detection
Contact image sensor (CIS) HP sensor (SR401)
Magnification range
25% to 400%
Vertical scan direction:
Image processing is by image processor PCB
Horizontal scan direction:
BOOK mode:
Carriage movement speed change and image
processing by image processor PCB *1
ADF mode:
Original feed speed change and image processing by
image processor PCB *1
Lens
Rod lens array
CMOS sensor
Number of lines: 1
Number of pixels: Total 7488 (incl. 7176 effective pixels)
Maximum original scan width: 304 mm
CIS drive control
Drive control by reader motor (M401)
Original size detection
[1] BOOK mode:
Vertical scan direction:
Detection by reflection type sensor (AB/INCH)
Horizontal scan direction: Detection by reflection type sensor (AB/INCH)
[2] When ADF is used
Width:
Detection by original width sensor PCB in ADF
Length:
Detection by photo sensor in ADF
*1 The control method depends on the magnification. For more details, refer to "Magnification Change".
Item
Function/Method
Exposure light source
LED
Original scan
In BOOK mode: Original scan is performed by moving the contact image sensor (CIS).
When ADF is used: Original stream reading is performed with the contact image sensor
(CIS) fixed.
Scan resolution
600 dpi (vertical scan) x 600 dpi (horizontal scan) (Color send: 300 dpi horizontal scan)
Gradation
256
Carriage position
detection
Contact image sensor (CIS) HP sensor (SR401)
Summary of Contents for iR2318 series
Page 1: ...May 12 2014 Service Manual iR2422 2420 2320 2318 Series ...
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Page 16: ...Contents ...
Page 17: ...Chapter 1 Introduction ...
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Page 51: ...Chapter 2 Installation ...
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Page 58: ...Chapter 2 2 4 7 Left cover front 15 Right cover upper 8 Manual feed tray 16 Right cover lower ...
Page 62: ...Chapter 2 2 8 8 Manual feed tray 16 Right cover lower ...
Page 64: ...Chapter 2 2 10 8 Manual feed tray 16 Right cover lower ...
Page 89: ...Chapter 2 2 35 ...
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Page 91: ...Chapter 3 Main Controller ...
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Page 103: ...Chapter 4 Original Exposure System ...
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Page 135: ...9 Remove the reader heater left 1 Connector 2 1 pc Screw 3 1 pc F 4 73 2 3 1 ...
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Page 137: ...Chapter 5 Laser Exposure ...
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Page 148: ...Chapter 5 5 8 ...
Page 149: ...Chapter 6 Image Formation ...
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Page 165: ...Chapter 7 Pickup Feeding System ...
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Page 193: ...Chapter 8 Fixing System ...
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Page 207: ...Chapter 9 External and Controls ...
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Page 229: ...Chapter 10 Maintenance and Inspection ...
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Page 235: ...Chapter 11 Standards and Adjustments ...
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Page 241: ...Chapter 12 Correcting Faulty Images ...
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Page 257: ...Chapter 13 Self Diagnosis ...
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Page 269: ...Chapter 14 Service Mode ...
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Page 287: ...Chapter 15 Upgrading ...
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Page 295: ...Chapter 16 Service Tools ...
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Page 301: ...Chapter 17 Backup Data ...
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