Canon Duplex Color B1 User manual

87654321
Service Manual
Duplex Color Image Reader - B1
July 30, 2009
Revision 0
Reader- Product Outline
Reader- Technology
Reader- Periodic Servicing
ADF- Product Outline
ADF- Technology
ADF- Periodic Servicing
Parts Replacement and Cleaning Procedure
Adjustment
Appendix

Application
This manual has been issued by Canon Inc. for qualied persons to learn technical theory,
installation, maintenance, and repair of products. This manual covers all localities where the
products are sold. For this reason, there may be information in this manual that does not
apply to your locality.
Corrections
This manual may contain technical inaccuracies or typographical errors due to improvements
or changes in products. When changes occur in applicable products or in the contents of this
manual, Canon will release technical information as the need arises. In the event of major
changes in the contents of this manual over a long or short period, Canon will issue a new
edition of this manual.
The following paragraph does not apply to any countries where such provisions are
inconsistent with local law.
Trademarks
The product names and company names used in this manual are the registered trademarks
of the individual companies.
Copyright
This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may
not be copied, reproduced or translated into another language, in whole or in part, without the
written consent of Canon Inc.
(C) CANON INC. 2009
Caution
Use of this manual should be strictly supervised to avoid disclosure of condential
information.

Explanation of Symbols
The following symbols are used throughout this Service Manual.
Symbols Explanation Symbols Explanation
Check. Remove the claw.
Check visually. Insert the claw.
Check the noise. Use the bundled part.
Disconnect the connector. Push the part.
Connect the connector. Plug the power cable.
Remove the cable/wire
from the cable guide or wire
saddle. Turn on the power.
Set the cable/wire to the
cable guide or wire saddle.
Remove the screw.
Tighten the screw.
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specic functions and the
relationship between electrical and mechanical systems with reference to the timing of
operation.
In the diagrams, represents the path of mechanical drive; where a signal name
accompanies the symbol, the arrow indicates the direction of the electric
signal.
The expression "turn on the power" means ipping on the power switch, closing the
front door, and closing the delivery unit door, which results in supplying the machine with
power.
2. In the digital circuits, '1' is used to indicate that the voltage level of a given signal is
"High", while '0' is used to indicate "Low". (The voltage value, however, differs from
circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD
signal goes on when '0'.
In practically all cases, the internal mechanisms of a microprocessor cannot be checked
in the eld. Therefore, the operations of the microprocessors used in the machines
are not discussed: they are explained in terms of from sensors to the input of the DC
controller PCB and from the output of the DC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product
improvement or other purposes, and major changes will be communicated in the form of
Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service
Manual and all relevant Service Information bulletins and be able to identify and isolate faults
in the machine.

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1
1Reader - Product Outline
Reader -
Product Outline
Features
Specications
Names of Parts
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11-2
1-2
Reader - Product Outline > Specications
Reader - Product Outline > Specications
Features
Adapting Reading sensor, allows low power consumption and high-speed trigger.
Exposure to light by white color LED, enables low power consumption, size reducing, and
color balance improvement.
Color aberration-free.
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Specications
Item Specication/function Remarks
Exposure system High-brightness white LED + reection plate -
Original
scan In BOOK mode Scan by movement of scanner unit -
In DADF
mode Scan by original stream reading with scanner unit xed
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Scanning resolution B&W: 600 dpi x 600 dpi
Color: 600 dpi x 600 dpi *
Gradation 256 gradations -
Carriage position
detection Scanner unit HP sensor (SR2) -
Magnication change 25% to 400% B&W: scan magnication
change (Vertical 2-line
skipping: 25 to 50%)
Color: digital reproduction
In horizontal
direction Image processing in main controller PCB -
In vertical
direction Image processing in main controller PCB Some are processed by the reader controller PCB.
Number of line of
Reading sensor 4 lines (R, G, B, B/W) -
Original
size
detection
In BOOK
mode Horizontal direction: detection by Scanner unit sensor (scanner unit) -
Vertical direction: detection by reection
sensor (original size sensor 1 (AB type) or
original size sensor 2 (Inch type)
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In DADF
mode Horizontal direction: detection by the original width volume/photointerrupter on DADF
-
Vertical direction: detection by the
photointerrupter on DADF -
Maximum
original
size
In BOOK
mode 297 mm x 431.8 mm -
In DADF
mode 304.8 mm x 630 mm -

1
11-3
1-3
Reader - Product Outline > Names of Parts > Cross Section
Reader - Product Outline > Names of Parts > Cross Section
Names of Parts
External View
PCB cover
Rear cover
Copyboard glass
Right cover
Front cover
Glass retainer
Stream read glass
Left cover
Cross Section
Stream reading glass Copyboard glass
Scanner unit

2
2Reader - Technology
Reader -
Technology
Basic Conguration
Technology
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2
22-2
2-2
Reader - Technology > Basic Conguration > Parts Conguration > Scanner Unit
Reader - Technology > Basic Conguration > Parts Conguration > Scanner Unit
Basic Conguration
Parts Conguration
Major Electrical Parts
Original size sensor 2
(CF2)
Original size sensor 1
(CF1)
Scanner unit
cooling fan (FM2)
Scanner unit
DADF
open/closed
sensor 1
(SR1)
Scanner unit
home position sensor
(SR2)
Scanner unit
exhaust fan (FM1)
Reader controller PCB
(PCB1)
Scanner motor (M1)
DADF
open/closed
sensor 2
(SR3)
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Component part Symbol Function/specication
Scanner motor M1 2 phase pulse motor: pulse control
Scanner unit exhaust fan FM1 Exhaustion of scanner unit
Scanner unit cooling fan FM2 Cooling of scanner unit
DADF open/closed sensor 1 SR1 DADF open detection (DADF is detected at 5 degree)
Scanner unit HP sensor SR2 Scanner unit HP detection
DADF open/closed sensor 2 SR3 DADF open detection (size detection timing is detected
when DADF is open at 25 degree)
Original size sensor 1 CF1 Size detection in vertical direction (AB type)
Original size sensor 2 CF2 Size detection in vertical direction (INCH type)
Scanner unit --- Image reading, analog image processing
Reader controller PCB PCB1 Control of entire reader, digital image processing
Scanner Unit
Original exposure and scanning are performed by the integrated scanner unit of LED,
turndown mirror, free curved mirror, and Reading sensor.
Light emitted from LED is reected by the original and reaches the Reading sensor through
the 3 folding mirrors and 4 free curvature mirrors.
Red (R) line
Greeen (G) line
Blue (B) line
Black & white (B / W) line
Reading sensor
Free curved mirrors Turndown mirrors
Reading sensor
Free curved mirrors
Turndown mirrors
LED (light source)
Scanner unit PCB
LED lamp unit
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2
22-3
2-3
Reader - Technology > Controls > Control Overview
Reader - Technology > Controls > Control Overview
LED lamp unit
On LED lamp unit, the light is generated from the 2 LED lamp PCBs (LED chip: 48 pieces
per PCB).
Generated light is exposed to the original through the reection plate.
Free curvature mirror
Scanner unit is equipped with the 3 folding mirrors and 4 free curvature mirrors.
Free curvature mirror has symmetric facet in horizontal direction and asymmetric facet in
vertical direction against the optical axis.
Reading sensor
Reading sensor scans the image per 1 image line.
Reading sensor has 4 lines (R, G, B, BW). At B&W scanning, it uses 1 line (B/W) and uses
3 lines (R, G, B) at color scanning.
Error codes
E301 (insufcient light intensity)
0001 The light intensity during front side shading is lower than the standard level
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Controls
Control Overview
Controls of reader and DADF are performed by the reader controller PCB.
Sensor
Fan
Motor
Host
machine
Reader
controller
PCB Scanner unit (reader)
Scanner unit (DADF)
DADF driver PCB
Error codes
E270 (Error in the horizontal/vertical synchronization signal).
0001 Vertical synchronization signal (VSYNC) is not properly transmitted from Scanner unit
PCB (front side scanner unit), and this causes image failure or abnormal termination.
0002 Vertical synchronization signal (VSYNC) is not transmitted due to the error in the
horizontal synchronization signal (HSYNC), and this causes image failure or abnormal
termination.
0101 Vertical synchronization signal (VSYNC) is not properly transmitted from Scanner unit
PCB (back side scanner unit), and this causes image failure or abnormal termination.
E280 (Communication error between reader controller PCB – scanner unit)
0001 If the communication is not started within the specied time between reader controller
PCB – front side scanner unit.
0001 If the communication is not started within the specied time between reader controller
PCB – back side scanner unit.
E400 (Communication error between reader controller PCB – DADF)
0001 If reception error occurs during communication between reader controller PCB - DADF
0002 If reception error occurs during communication between reader controller PCB - DADF
E490 (Error caused by incorrect DADF type)
0001 If a not-supported DADF type is installed.
E473 (Communication error between main controller PCB – reader controller PCB)
0000 If the reader controller PCB detects communication error between the main controller
PCB and the reader controller PCB.
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