This manual has been issued by Canon Inc. for qualified 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.
Indicates an item of reference assisting the understanding of the topic in question.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Refers to the Copier Basics Series for a better understanding of the contents.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
i
INTRODUCTION
2 Outline of the Manual
This Service Manual contains basic information needed to service the iR2200/iR2800/
iR3300 and its accessories (i.e., side paper deck, shift tray) in the field, conducted for the
purpose of maintaining its product quality and a specific level of performance. A separate
Service Manual is made available for each of its accessories (except for the side paper deck
and shift tray); for details, refer to the appropriate manual.
This Service Manual consists of the following chapters:
1. System Unit
Chapter 1General Description:features, specifications, names of parts, func-
tions, operation, system configuration, routine maintenance by the user
Chapter 2Main Controller:functional construction, outline of electrical
circuitry, principles of operation of the image
processing system, power supply
Chapter 3Installation:site conditions and installation procedure,
relocation of the machine, installation of accessories
2. Reader Unit
Chapter 1Basic Operation:functional construction, outline of electrical
circuitry, basic sequence of operations
Chapter 2Original Exposure System:principles of operation of the exposure sys-
tem, timing of operation, disassembly/assembly and adjustment
Chapter 3Image Processing System:principles of operation of the image process-
ing system, timing of operation, disassembly/
assembly and adjustment
3. Printer Unit
Chapter 1Introduction:safety of the laser, image formation, auxiliary
processes
Chapter 2Sequence of Operations:basic operations, outline of electrical cir-
cuitry, basic sequence of operations
Chapter 3Laser Exposure System:principles of operation of the laser exposure
system, timing of operation, disassembly/
assembly and adjustment
Chapter 4Image Formation System:principles of operation of the image forma-
tion system, timing of operation, disassembly/assembly and adjustment
Chapter 5Pickup/Feeding System:principles of operation of the pickup/feeding
system, timing of operation, disassembly/
assembly and adjustment
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
iii
INTRODUCTION
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific 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 flipping 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 indica te “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 field. 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.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
1-1 S
CHAPTER 1 GENERAL DESCRIPTION
1.1.3 Functions
ItemDescription
ResolutionReading600dpi×600dpi
Copying1200dpi×600dpi
Printer output2400dpi×600dpi
Original typeSheet, book 3-D object (2 kg max.)
Maximum original sizeA3/279.4×431.8mm (11"×17")
Reproduction ratioDirect (1:1), Reduce I (1:0.250), Reduce II (1:0.500),
Reduce III (1:0.611), Reduce IV (1:0.707), Reduce III (1:1.414),
Enlarge IV (1:2.000), Enlarge V (1:4.000), Enlarge VI (1:8.000),
Zoom (1:0.250 to 8.000 ; 25% to 800% in 1% increments)
Wait time10 sec or less (at 20°C/168°F)
First copy time5.8 sec (book mode, cassette 1, Direct, A4/LTR, text mode)
Continuous copying999 copies max.
Copy size
CassetteA/BA3 max., A5 (vertical feed) min.
Inch279.4×431.8 mm (11"×17") max., STMT (vertical feed) min.
Manual feedABA3 max., postcard (vertical feed) min.
Inch279.4×431.8 mm (11"×17") max., STMT (vertical feed) min.
Cassette 1/2• Plain paper (64 to 80 g/m2):A3, B4, A4, B5, A5R, A4R, B5R,
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
1-3 S
CHAPTER 1 GENERAL DESCRIPTION
ItemDescription
CassetteCapacity55 mm deep (approx.; about 500 sheets of 80 g/m2 paper)
Hard disk6GB
Non-image width Leading edgeDirect, Enlarge/Reduce:4.0±1.5/-1.0mm <4.5±1.8mm>*1
Weight80 kg (approx.)/176.3 lb (approx.)
ConsumablesCopy paperKeep wrapped to protect against humidity.
TonerKeep away from direct sunshine, and keep at
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
Side paper
deck
(accessory)
1-13 S
CHAPTER 1 GENERAL DESCRIPTION
3.2 Outline of the Electr ical Circuitr y
3.2.1 Construction of the Electrical Circuit
The major electrical mechanisms of the machine are controlled by the following PCBs:
[1] Man controller PCB; controls the system as a whole, processes images
[2] DC controller PCB; controls the printer unit, controls the finisher communication
[3] Reader controller PCB; controls the reader unit, controls the DADF communication
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2-1 S
CHAPTER 2 MAIN CONTROLLER
1.2 Outline of the Electr ical Circuitr y
1.2.1 Outline
The major electrical mechanisms of the controller block are controlled by the CPU on the
main controller PCB. The CPU, RAM, DIMM, and the ICs and HDD around the CPU have
the following functions:
1.2.2 Main Controller PCB
NameDescription
CPU• Controls the processing of image data from the reader unit.
• Controls the processing of image data to the printer unit.
• Controls the HDD.
• Controls the interface of the following: network, DMA controller, PCI,
and ROM/RAM.
RAM• Stores program data and image data temporarily.
DIMM-ROM• Stores the system control program.
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2-3 S
CHAPTER 2 MAIN CONTROLLER
1.3 Star t-Up Sequence
1.3.1 Outline
The system software used to control the machine is stored on the machine’s HDD. The
CPU on the main controller PCB reads the system software from the HDD into the SDRAM
fitted to the DIMM socket of the main controller PCB.The control panel displays the following screen while the CPU reads the system software from the HDD to the SDRAM, and the
progressive bar on the screen indicates the progress of the start-up sequence.
Main controller PCB
access to the program during execution
Boot
program
F02-103-02
E601-0000, 0001
Indicates the presence of an error in image transfer information.
E602-0001, 0002
Indicates the presence of an error in write/read operation.
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2-5 S
CHAPTER 2 MAIN CONTROLLER
When the self-diagnostic program ends normally, the boot program also stored in the boot
ROM will start up. The boot program reads the system software from the HDD into the system area of the SDRAM.
When the write operation ends, the system software in the SDRAM starts up to initialize
the various parts of the machine, at the end of which the control panel will indicate the normal operation screen and, at the same time, the Start key LED changes from red to green to
indicate that the machine is ready to accept a job.
The machine’s system software consists of multiple modules, and those modules that are
needed for a specific task in question will be called into the system area of the SDRAM for
use.
An image is enlarged or reduced by processing image data when writing it into or reading
it from image memory.
2.2.3 Edge Emphasis
For each mode (text, text/photo, print photo, film photo), edge emphasis is executed so as
to increase sharpness while suppressing moire.
2.2.4 Editing
The machine provides various editing functions: negative/positive reversal, mirror, fold.
2.2.5 Density Conversion (LUT)
In this block, the intensity image signals are converted into density image signals, and
processing is executed so as to enable the best output density curve for a specific mode in
question.
a. LOG Conversion
Using a LOG conversion table, intensity image signals based on reflected light are converted into density image signals based on density data.
b. Density Adjustment (F-value conversion)
The F-value table most suited to the setting of the Density key in the control panel is used
to adjust the density; it, however, will not be executed in memory copy mode.
c. Density Correction (
The γ conversion table best suited to each specific mode (test, text/photo, print photo, film
photo) is used to correct density.
In the error diffusion method (T-BIC), the texture is controlled to process the data for optimum printing effects; 8-bit image density signals of each mode (text, text/photo, print
photo) are converted into 1-bit image density signals (binary).
2.2.7 Binary (dither screen method)
In the dither screen method, the texture is controlled to process the data for optimum
printing effects; 8-bit image density signals for film photo mode are converted into 1-bit image density signals (binary).
Although expressed in binary, the resulting signals enable reproduction in 256 gradations
(dither screening of 40×40 pixels).
2.3 Image Memor y Control
The image data after binary processing is controlled for the following:
2.3.1 Compression/De-Compression, Rotation, and Enlargement/Reduc-
tion
The binary data generated as the result of the foregoing processes is subjected to the following: compression/de-compression (for electronic sorting), rotation, resolution conversion.
2.3.2 SDRAM
The image data subjected to image memory control is temporarily stored in SDRAM.
2.3.3 HDD
The HDD functioning as an image server is used to store image data for the Box function.
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CHAPTER 2 MAIN CONTROLLER
3 Soft Counters
The machine is equipped with soft counters that count the number of prints it has
handled; the counter readings may be checked by pressing the Check key in the control
panel.
The counters are controlled by the main controller PCB, and each count is incremented
when any of the following sensors detects paper during copy/print operation:
When No Delivery Option Is Installed
Copy/print operationSensor usedDelivery slot
Single-sidedPS15No. 1 delivery sensorBelow the inside tray
Double-sided1st sidePS18Duplexing unit outlet sensor
2nd sidePS15No. 1 delivery sensorBelow the inside tray
When the Inner 2-Way Tray Is Used
Copy/print operationSensor usedDelivery slot
Single-sidedPS19S No. 2 delivery sensorAbove the inside tray
PS21S No. 3 delivery sensorOutside tray
PS18Duplexing unit outlet sensor
Double-sided1st sidePS19S No. 2 delivery sensorAbove the inside tray
When a Finisher Is Installed
Copy/print operationSensor usedDelivery slot
Single-sidedS2Inlet sensorFinisher delivery tray
Double-sided1st sidePS18Double-sided outlet sensor
2nd sideS2Inlet sensorFinisher delivery tray
When Delivery Is to the Saddle finisher
Copy/print operationSensor usedDelivery slot
Single-sidedPI1Inlet sensorFinisher delivery tray
Double-sided1st sidePS18Double-sided outlet sensor
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CHAPTER 2 MAIN CONTROLLER
The counters possess a total of 16 modes, consisting of eight modes for large-size papers
and eight modes for small-size papers; the following shows the basic counter modes:
100V model120/230V model
Counter 1Total (A through L)ONONFi xed
Counter 2Total large (ACEGIK)OFFONMay be changed.
Counter 3Copy 1 (ABGH)OFFONMay be changed.
Counter 4Copy 1 large (AG)OFFONMay be changed.
Counter 5Print 1 total (CDEF)OFFOFFMay be changed.
Counter 6Fax total (IJ)OFFOFFMay be changed.
*1:The notations in the parentheses indicate the corresponding basic counter modes (T02-300-20).
*2:The counter description may be changed or enabled/disabled for display in service mode (except
counter 1, whose setting cannot be cannot be changed).
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
2-13 S
CHAPTER 2 MAIN CONTROLLER
OPTION>USER>COUNTER1
Use it to enable/disable the display of soft counter 1 in the control panel.
OPTION>USER>COUNTER2
Use it to enable/disable the display of soft counter 2 in the control panel, or
to change the counter type.
OPTION>USER>COUNTER3
Use it to enable/disable the display of soft counter 3 in the control panel, or
to change the counter type.
OPTION>USER>COUNTER4
Use it to enable/disable the display of soft counter 4 in the control panel, or
to change the counter type.
OPTION>USER>COUNTER5
Use it to enable/disable the display of soft counter 5 in the control panel, or
to change the counter type.
OPTION>USER>COUNTER6
Use it to enable or disable the display of soft counter 6 in the control panel,
or to change the counter type.
In standby mode, the machine is in operation or is ready operate, and nearly all components are supplied with power; not only the main controller PCB, but also the reader unit,
printer unit, and control panel are all ready for communication and control.
4.4 Sleep Mode 1
In sleep mode 1, only the LCD image desplay remains OFF.
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CHAPTER 2 MAIN CONTROLLER
4.5 Sleep Mode 2
In sleep mode 2, only the +3.3V all-night (3.3 VB) power supply is ON. The CPU on the
main control paper remains in wait for an interrupt (keeping the program at rest) to limit the
consumption of power.
4.5.1 Shift from Standby Mode to Sleep Mode 2
A shift from standby mode to sleep mode 2 is executed under the following:
•The power switch (soft switch) in the control panel is OFF.
•The machine has remained in standby mode for a specific period of time (may be
changed in user mode).
4.5.2 Shift from Sleep Mode 2 to Standby Mode
A shift from sleep mode 2 to standby mode is executed for the following:
• The power switch (soft switch ) in the control panel is ON.
4.5.3 Shift from Sleep Mode 2 to Sleep Mode 1
A shift from sleep mode 2 to sleep mode 1 is executed for the following:
•PDL data is received from the network or from the parallel port.
4.6 Tur ning Off the Power
The power is turned off when the main power switch is turned off. A shift from this sta te
may be made only by turning on the main power switch; the shift will be automatic and to
standby mode.
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2-17 S
CHAPTER 2 MAIN CONTROLLER
5 New Functions
5.1 Hard Disk Spool
In hard disk spool, print data is not directly sent to memory for printing, but spooled on
the HDD before printing, thus releasing the application program running on the host PC
sooner than otherwise.
When this function is used, a print job from the PC is stored in the spool area of the
HDD. (The spool area is as large as about 300 MB.) Once spooled, the jobs are then sent to
the RIP processing block in the order they have been received.
The jobs are removed from the spool as they are printed, and as many as 100 jobs may be
spooled at a time.
The following diagram shows the flow of data, from spooling on the HDD to execution:
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CHAPTER 2 MAIN CONTROLLER
5.2 SMB Pr inting
SMB has been developed so as to use NetBIOS, which specifies an address by means of a
computer name, for use solely with a specific protocol. SMB over TCP/IP is designed for
use in combination with the TCP/IP protocol, enabling the machine to print data directly
from Windows 95/98/ME without going through a Windows NT/2000 sever as is in the case
of LPR printing and without the need for an LPR utility. (A Windows work group may be
made use of, but Windows NT/2000 cannot be called into the domain.)
On a TCP/IP network an address must be specified by means of an IP address, not the
name of the computer in question, requiring conversion of a computer name into an IP address. If a WINS (Windows Internet Name Service) server exits on the network, the function
may also be made use of. If it does not exist or is not used, the PC will contact all devices
on the network to find out the IP address of the machine before it sends a print job to the
machine.
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2 Unpacking and Installation
2.1 Before Star ting the Work
Keep the following in mind for the work:
1. If the machine is brought in from a cold to warm place, its pickup/feeding assembly can develop condensation, leading to image faults. Leave
the machine alone for at least one hour, and start the work after the machine has become used to the room temperature.
The term condensation refers to the symptom that occurs when a piece of
metal is brought in from a cold to warm place, cooling the vapor in the
air rapidly and turning it into droplets of water on the metal surface.
2. The machine weighs about 80 kg. Be sure to work in a group of four.
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3-9 S
CHAPTER 3 INSTALLATION
2.6 Mounting the Dr um Unit
WorkChecks/remarks
1) Unpack the drum unit, and remove the
two releasing members [1] of the primary charging roller.
Remove all other packing tape and the
like.
1. Do not touch the dump area
of the photosensitive drum to
avoid damage.
2. Take care not to expose the
photosensitive drum to strong
light.
3. Take care not to damage the
stirrups found at the bottom
of the drum unit.
2) Check to make sure that the developing
assembly is released; then, holding the
drum unit [1] by its long hole, slide inside the machine along the rails [2].
At this time, take full care not to bring
the developing assembly in contact with
the developing cylinder, which is situated nearby.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
Function
Check the Developer
+/-OK
Counter
2.8 Setting the Cassette
WorkChecks/remarks
1) Press the cassette releasing button, and
slide out the cassette to the front.
2) Check with the user to find out the size
of paper to use, and check the size setting (A/B or Inch) using the selection
switch [1] of each cassette.
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3-17 S
CHAPTER 3 INSTALLATION
2.10Connecting to the Network
Perform the following steps if the machine is equipped with printer functions:
1) Turn off the main power.
2) Connect the network cable to the machine, and turn on the main power.
3) Inform the user’s system administrator that the machine has been installed, and ask him/
her to make the network settings for the machine.
2.11Checking the Network Connection
Perform the following steps if the machine is equipped with printer functions:
If the user’s network environment is TCP/IP, use the PING function to make sure that the
network PCB has properly been installed and the network settings have properly been made.
If the user’s network environment is IPX/SPX or AppleTalk, on the other hand, these checks
are not needed.
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CHAPTER 3 INSTALLATION
2.11.2 Making a Check Using a Remote Host Address
The connection to the network may be checked by executing PING using a remote host
address (i.e., the IP address of a PC terminal connected to and operating on the TCP/IP network to which the machine is connected).
1) Inform the user’s system adminisrator that the network connection will be checked using
PING.
2) Check with the user’s system administrator to find out the remote host address.
3) Enter the remote host address in the PING field.
•If ‘OK’ is indicated, the connection to the network is correct.
•If ‘NG’ is indicated, the connection to the network is not correct; investigate the cause as
follows:
2.12Troubleshooting the Network
Perform the following steps if the machine is equipped with printer functions:
If the connection to the network is not made, the following can be suspected; perform the
steps under 2.12.1 to correct the faults:
a. The connection between the network and the network PCB is faulty.
b. The TCP/IP settings on the machine are faulty.
c. The network PCB is faulty, or the PCB is mounted wrongly.
d. The user network is faulty.
2.12.1 Checking the Connection of the Network Cable
1) Check to find out if the network cable is correctly connected to the network PCB.
•If the connection is correct, go to 2.12.2.
•If the connection is wrong, correct it, and make a check once again using the remote
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3-19 S
CHAPTER 3 INSTALLATION
2.12.2 Making a Check Using a Loop-Back Address
A loop-back address is returned before it reaches the network PCB; therefore, executing
PING using it will enable a check on the TCP/IP settings made on the machine.
1) Enter the loop-back address (127.0.0.1) in the PING field.
•If ‘NG’ is indicated, check the TCP/IP settings of the machine once again, and execute
PING once again.
•If ‘OK’ is indicated, go to 2.12.3.
2.12.3 Making a Check Using a Local Host Address
The local host address is the IP address of the machine, and executing PING using it will
enable a check on the network PCB (it is retuned after it reaches the network PCB).
1) Enter the IP address of the machine in the PING field.
•If ‘NG’ is indicated, perform the following check/correction, and execute PING once
again:
a. If the IP address of the machine is wrong, check the IP address settings made on the ma-
chine once again, or find out if the IP address assigned to the machine is correct or not
by consulting the user’s system administrator.
b. If the network has faulty connection, check the connector of the network PC for connec-
tion.
c. If the network PCB is faulty, replace the network PCB.
•If ‘OK’ is indicated, suspect a problem in the user’s network environment; report to the
user’s system administrator, and ask for corrective measures.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 3 INSTALLATION
3 Relocating the Machine
3.1 Prepar ing for Relocation
If the machine must be relocated by truck or other means of transportation after it has
been installed, perform the following:
Do not lift the machine by holding its grips as when moving it over a step;
otherwise, the machine will become separated from the pedestal. Be sure to
lift the pedestal if the machine is connected to it.
WorkChecks/remarks
1) Remove the fixing screw, and detach the
drum unit.
2) Fix the scanner in place.
3) Tape the front cover, delivery assembly,
and cassette in place.
4) Place a single sheet of A3/11×17 paper
on the copyboard glass, and tape the
copyboard cover (ADF) in place.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
[1]
[2]
CHAPTER 3 INSTALLATION
WorkChecks/remarks
9) While pushing in the connector [1] and
the harness [2] inside the machine, fit
the boss of the right rear cover into the
opening in the card reader support plate;
then, secure the card reader to the machine using a screw [3] and a washer
[4].
Take care not to trap the connector or the harness.
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3-25 S
CHAPTER 3 INSTALLATION
5 Installing the Document Tray-D2
WorkChecks/remarks
1) Remove the two stickers from the right
top of the machine.
Using the two stepped screws [1] (RS
tightening; M4×10) that come with the
machine, mount the document tray [2]
to the machine.
•If the work proves to be difficult, loosen
the two stepped screws, and try again.
1. Be sure to use the stepped
screws designed for the machine; ones for other types
come together with the machine.
2. The document tray may be
mounted to the left side of the
machine.
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3-27 S
CHAPTER 3 INSTALLATION
WorkChecks/remarks
7) Check to see the developing assembly is
freed; then, slide in the new drum unit
along the rails in the machine slowly. At
this time, take full care not to bring the
developing assembly into contact with
the developing cylinder, which is located very close.
To avoid damaging the stirs
found on the bottom of the
drum unit, hold the front cover
of the drum unit with your right
hand while keeping your left
hand in the long hole of the left
side plate of the drum unit.
Rails
Drum unit
8) Secure the new drum unit in place using
the fixing screw you removed in a previous step.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
1 Outline of Operations
1.1 Outline
The major functions of the original exposure system are as follows:
Item
Scanning lamp
Original Scanning
Scanner position detection
Reproduction ratio (zoom)
Scanner drive control
Lens
Scanning lamp activation
Original size detection
Description
Xenon lamp
In book mode: by moving the scanner.
With ADF in use: by stream reading while holding the No. 1
mirror base fixed in position.
By scanner HP sensor (PS400)
[1] Using the Copyboard: 25% to 800%
•In main scanning direction, image processing is performed by the controller unit.
•In sub scanning direction, the speed of the No. 1 mirror
base is changed (50% or higher and lower than 400%),
in addition, the image data is processed by the controller unit (lower than 50% and 400% or higher).
[2] Using the ADF: 25% to 200%
•In main scanning direction, the image data is processed
by the controller unit.
•In sub scanning direction, the speed at which the originals are moved is changed (50% or higher and lower
than 200%), in addition, the image data is processed by
the controller unit (lower than 50%and 200% or
higher).
The No.1/No.2 mirror base is controlled by means of a stepping motor (M400).
Lens array (fixed in position)
[1] Turned on b y an inverter circuit.
[2] Monitored for errors.
[1] In book mode, by a reflection type sensor in sub scan-
ning direction; by a CCD in main scanning direction.
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2-1 R
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
The major components of the original exposure system are as follows:
No. 2 mirror
No. 2 mirror
base
[4]
Stream reading position
(start position)
No. 1 mirror base
No. 1 mirror
No. 3 mirror
F02-101-01
[3]
[5]
[6]
Image leading
edge
HP
Scanning lamp
[1]
Original
Copyboard glass
Lens
[2]
CCD
Component
[1] Scanning lamp
[2] Scanner motor
[3] Scanner HP sensor
[4] Copyboard cover
sensor
[5] No.1 mirror base
[6] No.2 mirror base
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COPYRIGHT
F02-101-02
Notation
LAMP1
M400
PS400
PS401
Xenon lamp (intensity of 40,000 lx)
2-phase stepping motor (under pulse control)
Photointerrupter (detects scanner home position)
Photointerrupter (detects the state (open/closed) of
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
HP
Image
leading
edge
Point of original
size detection
: No. 1 mirror base
Image
end
Stop
position
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
1.3 Enlargement/Reduction (zoom)
[1] When the copyboard cover is used, the ratio may be between 25% and 800% and the
speed of the scanner is controlled.
[2] When the ADF is used, the ratio may be between 25% and 400% and the speed of
moving the originals is controlled.
1.3.1 Changing the Reproduction Ratio in Main Scanning Direction
For main scanning direction, the original is read at 100% (for both copyboard and ADF);
the size is changed by processing data in the main controller unit.
[1] To reduce, data units are skipped when writing image data to the line memory.
[2] To enlarge, data units are read multiple times when reading image data from the line
memory.
1.3.2 Changing the Reproduction Ratio in Sub Scanning Direction
For sub scanning direction, the speed of the scanner/movement of the original is changed.
However, for a reduction between 25% and 49% and enlargement between 401% and 800%,
data processing in the main controller assembly is also used in combination.
[1] For enlargement, the speed of the mirror/original is reduced from that used in Direct:
e.g., at 200%, the speed is 1/2 of the speed used in Direct.
[2] For reduction between 50% and 99%, the speed of the mirror/original is increased;
e.g., at 50%, the speed is twice as high as that used in Direct.
(speed ratio)
2
1
1/2
1/4
50%
400%200%100%
(image ratio)
F02-103-01
[3] To reduce to between 25% and 49%, the image data read at 50% and 98% is subjected
to skipping (1/2) in the main controller unit.
[4] For an enlargement between 401% and 800%, image data read at 200% to 400% is
sub-jected to repeating (doubling) in the main controller assembly.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
2.2 Controlling the Scanner Motor
The system used to control the scanner motor is constructed as follows:
The motor driver turns on/off the scanner motor and controls its direction and speed of
rotation in keeping with the signals from the CPU and motor driver controller.
Reader controller PCB
CPU
Motor
driver
Motor driver
contoroller
A
A*
B
B*
+24V
J401
1
5
2
3
6
4
Scanner motor
M400
F02-202-01
2.2.1 Controlling the Motor When Scanning an Image
When scanning an image, the motor is controlled as follows, thereby controlling the
movement of the No. 1 mirror base unit:
Stream reading position
(start position)
Travel
speed
HPImage leading edgeImage end
AccelerateMaintain
[1][2][3][4]
Stop
Decelerate
Travel distance
[1] Acceleration. Used to accelerate until the speed most appropriate to the read ratio is
attained.
[2] Approach run. Used to ensure that speed stabilizes.
[3] Image read. Used to read the image at a specific speed suited to the read ratio.
[4] Deceleration. Used to enable the scanner to speed down and stop promptly, starting at
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
2-7 R
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
2.2.2 Reversing the Scanner After Scanning in Main Reading Direction
When the image has been scanned, the No. 1 mirror base is moved in reverse to home po-
sition at the speed used for 50% reduction, regardless of the ratio being used.
E202 (HP detection error)
[1] The No. 1 mirror base does not reach the HP sensor within a specific
period of time.
[2] The HP sensor identifies the presence of the No. 1 mirror base when the
No. 1 mirror base should have been moved away.
E204 (image leading edge detection error)
[1] The ADF does not generate the image leading edge signal in stream
reading mode.
COPIER>ADJUST>ADJ-XY>ADJ-X (scanner image leading edge
adjustment)
Enter an appropriate value to adjust the image leading edge position.
Range: 250 through 290 (a change of ‘1’ causes a shift of 0.1 mm)
COPIER>FUNCTION>CCD>SHDG-POS (shading position adjustment)
•Execute this mode if a white line still appears after executing
COPIER>FUNCTION>CCD>SH-PS-ST or after cleaning the scanner
mechanisms.
•After entering a setting and executing
COPIER>FUNCTION>CCD>SH-PS-ST, check to make sure that ‘OK’ is
indicted. Thereafter, make a test print to be user that no white line is found
in its halftone area.
Range: 240 to 320 (a multiple of 8 causes a shift of about 0.17 mm)
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
3 Controlling the Scanning Lamp (LA2)
3.1 Outline
The system used to control the scanning lamp is constructed as follows and the items of
control include the following:
[1] Turning on and off the scanning lamp.
[2] Monitoring the scanning lamp for errors.
Xenon lamp
LAMP1
Inverter PCB
Activation
control
circuit
J4021
1
LAMP_ON
3
INV_ERR
4
2
Reader controller
J402
+24V
5
3
2
4
PCB
CPU
F02-301-01
3.2 Scanning Lamp
The machine’s scanning lamp is a xenon lamp of a non-electrode discharge type, in which
xenon gas is sealed in a tube.
On the outside of the glass tube, two electrodes are arranged parallel to the tube axis, and
the inner side of the glass tube is coated with fluorescent material.
The internal gas discharges and, as a result, the fluorescent material glows when a high-
frequency voltage is applied across the electrodes.
Electrode
F02-302-01
Electrode
Fluorescent
material
ElectrodeElectrode
Opening
Glass tube
3.3 Tur ning On/Off the Lamp
The scanning lamp is turned on/off in response to the drive signal (LAMP_ON) from the
CPU on the reader controller PCB. When the signal is generated, the inverter generates a
high-frequency voltage using the drive voltage (+24 V) supplied by the reader controller
PCB to turn on the xenon tube.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
2-9 R
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
3.4 Detecting an Error
The reader controller circuit generates the error signal (INV_ERR) in response to an error
(e.g., output open, short circuit, leak) in the inverter circuit. A fault in the lamp (low intensity, activation failure) will be identified as an activation error caused by lack of intensity
during initial activation (e.g., at time of shading correction).
E220
It is used to indicate a fault in the inverter PCB.
E225
It is used to indicate a fault in the scanning lamp (xenon tube).
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
4 Detecting the Size of Originals
4.1 Outline
The machine automatically identifies the size of originals based on the combination of in-
tensities measured by reflection type sensors and CCD at specific points.
•For main scanning direction, the CCD is used to take measurements (if AB, 4 points; if
Inch, 2 points).
•For sub scanning direction, a reflection type photosensor is used (1 point).
4.2 Points of Detection
For main scanning direction, the No. 1 mirror base is moved to the following points in re-
lation to the position of the original to measure the intensity at each point.
For sub scanning direction, on the other hand, measurements are taken while holding the
sensor in place at a specific point.
AB-ConfigurationInch-Configuration
Original sensorOriginal sensor
Point of original
detection 1
Point of original
detection 2
Point of original
detection 3
Point of original
detection 4
Point of CCD original detection
B5
A4
B5R
A4R
B4
A3
Point of original
detection 1
Point of original
detection 2
Point of CCD original detection
LTRR
LTR
LGL
279.4×431.8mm
(11"×17")
F02-402-01
4.3 Outline of Detection
The machine identifies the size of originals in the following two steps:
[1] Detecting External Light (main scanning direction only)
While keeping the scanning lamp off, the CCD level at each point of detection in main
scanning direction is measured. A point at which external light is detected will be identified as indicating the absence of an original, enabling the identification of the width
of an original.
[2] Detecting the Sensor Output Level
The scanning lamp is turned on, and the CCD level at each point of detection in main
scanning direction is measured. In addition, the reflection type photosensor in sub
scanning direction is turned on to measure the sensor output.
The combination of these output measurements is used to identify the size of the original. For specific movements, see the pages that follow.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
2-11 R
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
4.4 Outline of Detection Operation
4.4.1 Book Mode, 1 Original, Copyboard Cover Open
Xenon lamp
Copyboard cover
Reader unit
(external light)
(external light)
Point of original detection 1
Point of original detection 2
Point of original detection 3
Point of original detection 4
Point of original detection
Original (A4R)
F02-404-01
Original sensor
Copyboard glass
[1] The scanner remains in wait.
No. 1 mirror base: at HP
Xenon lamp: off
Original sensor: disabled
[2] The copyboard is opened.
Detection starts of external light in main
scanning direction.
No. 1 mirror base: to point of original detection
Xenon lamp: off
Original sensor: disabled
[3] An original is placed.
The width of the original is identified in
relation to the presence/absence of external
light; here, the absence of an original is
identified at points in question, eliminating
B5, B4, A4, and A3.
[4] The Start key is pressed.
In response, original detection is started.
For main scanning direction, the xenon
lamp is turned on to check for reflected
light by the CCD (4 points).
For sub scanning direction, the original
sensor starts detection.
The absence of external light is identified
as indicating the absence of an original.
The machine will identify the size of an
original based on the combination of the
results (T02-404-01)
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 ORIGINAL EXPOSURE SYSTEM
AB-Configuration
Originals
size
Point of CCD detection
1234
A3
B4
A4R
A4
B5
Original
senso
Inch-Configuration
Originals
r
size
11"×17"
LGL
LTRR
LTR
None
Point of CCD detection
12
B5R
None
: reflection present : reflection absent
T02-404-01
4.4.2 Book Mode, 1 Original, Copyboard Cover Close
Xenon lamp
Copyboard cover
Reader unit
(external light)
Original sensor
Point of original detection 1
Point of original detection 2
Point of original detection 3
Point of original detection 4
Point of original detection
Copyboard glass
[1] The scanner remains in wait.
No. 1 mirror base: HP
Xenon lamp: off
Original sensor: disabled
[2] The copyboard cover is opened.
Detection starts of external light in main
scanning direction.
No. 1 mirror base: to point of original detection
Xenon lamp: off
Original sensor: disabled
The width of an original is identified in
terms of the presence or absence of external light; here, the external light is blocked
and the absence of an original is identified,
excluding B5, B4, A4, and A3.
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
2-13 R
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