SERVICE
MANUAL
REVISION 0
JUNE 2000
COPYRIGHT  2000 CANON INC.
JY8-1317-00Z
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
COPYRIGHT © 2000 CANON INC.
Printed in Japan
Imprimè au Japon
Use of this manual should be strictly supervised
to avoid disclosure of confidential information.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
LIST OF SERIAL NUMBER
CanoScan N650U
CanoScan N656U
CanoScan N1220U
COPYRIGHT  2000 CANON INC.
F91-4611-200
F91-4631-200
F91-4641-200
F91-4661-200
F91-4671-200
F91-4681-200
F91-4691-200
F91-4612-200
F91-4622-200
F91-4632-200
F91-4642-200
F91-4662-200
F91-4672-200
F91-4682-200
F91-4692-200
F91-4712-200
F91-4722-200
F91-4732-200
F91-4742-200
F91-4762-200
F91-4772-200
F91-4782-200
F91-4792-200
AZJ000001CZJ000001DZJ000001FZJ000001LZJ000001JZJ000001KZJ000001AZK000001MZK000001CZK000001DZK000001FZK000001LZK000001JZK000001KZK000001AZL000001MZL000001CZL000001DZL000001FZL000001LZL000001JZL000001KZL000001-
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
PREFACE
This service manual contains the basic information necessary for servicing the N650U/N656U/
N1220U image scanners.
The service manual consists of the following chapters.
Chapter 1: General Descriptions
Features, specifications, exterior features, installation, customer’s daily
maintenance
Chapter 2: Operation and Timing
Basic operation, optical system, image processing system, control system,
power supply
Chapter 3: Mechanical System
Externals, drive system, optical system, electrical system
Chapter 4: Maintenance and Servicing
Periodical replacement parts, consumable parts durability, periodical
servicing, special tools, solvents and lubricants
Chapter 5: Troubleshooting
Introduction, troubleshooting, location of electrical parts, canon scanner
test
Chapter 6: Parts Catalog
Appendix: General Circuit Diagram, Main PCB Circuit Diagram, USB Connector PCB
Circuit Diagram
The information in this service manual is subject to change as the product is improved.
All relevant information in such cases will be provided by the service information bulletins.
A thorough understanding of the N650U/N656U/N1220U, based on the service manual and
service information bulletins, is vital to the serviceman in maintaining the product quality and
performance, and in locating and repairing the cause of malfunctions.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CONTENTS
CHAPTER 1 : GENERAL DESCRIPTIONS
I.
FEATURES ..................................... 1-1
A. Preface ..................................... 1-5
II.
SPECIFICATIONS ........................... 1-2
B. Installation .............................. 1-6
III. EXTERIOR FEATURES .................. 1-4
C. Connecting to the Host Computer
A. Front View ............................... 1-4
................................................. 1-7
B. Rear View ................................. 1-4
D. Scanning a Document ............ 1-8
IV. INSTALLATION .............................. 1-5
V.
CUSTOMER’S DAILY
MAINTENANCE .............................. 1-9
CHAPTER 2 : OPERATION AND TIMING
I.
II.
D. Drive Motor Control Circuit
BASIC OPERATION ........................ 2-1
A. Functions ................................ 2-1
............................................... 2-16
B. Outline of Electrical System .. 2-2
III. IMAGE PROCESSING SYSTEM ... 2-17
C. Main PCB Input and Output ... 2-3
A. Outline .................................. 2-17
D. Basic Sequences ..................... 2-4
B. Image Processing Functions
OPTICAL SYSTEM ....................... 2-11
............................................... 2-18
A. Outline .................................. 2-11
IV. CONTROL SYSTEM ..................... 2-20
B. Document Scanning Sequence ...
A. Outline .................................. 2-20
............................................... 2-12
B. Outline of USB ...................... 2-21
C. Contact Image Sensor ........... 2-13
V.
POWER SUPPLY .......................... 2-23
CHAPTER 3 : MECHANICAL SYSTEM
I.
II.
EXTERNALS .................................. 3-1
III. OPTICAL SYSTEM ......................... 3-9
A. Covers ...................................... 3-1
A. Contact Image Sensor ............. 3-9
DRIVE SYSTEM .............................. 3-5
IV. ELECTRICAL SYSTEM ................ 3-11
A. Drive Unit ................................ 3-5
A. USB Connector PCB .............. 3-11
B. Drive Wire ................................ 3-8
B. Flat Cable .............................. 3-13
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 : MAINTENANCE AND SERVICING
I.
II.
PERIODICAL REPLACEMENT
III. PERIODICAL SERVICING .............. 4-1
PARTS ............................................ 4-1
IV. SPECIAL TOOLS ............................ 4-1
CONSUMABLE PARTS DURABILITY ..
V.
SOLVENTS AND LUBRICANTS ...... 4-1
................................................. 4-1
CHAPTER 5 : TROUBLESHOOTING
I.
II.
INTRODUCTION ............................. 5-1
III. LOCATION OF ELECTRICAL PARTS ..
A. Initial Check ............................ 5-1
................................................. 5-4
B. Others ...................................... 5-1
IV. CANON SCANNER TEST ................ 5-5
TROUBLESHOOTING ..................... 5-2
A. Outline .................................... 5-5
A. Troubleshooting Image Defects ...
B. How To Use Canon Scanner Test .
................................................. 5-2
................................................. 5-5
B. Troubleshooting Malfunctions
................................................. 5-3
CHAPTER 6 : PARTS CATALOG
FIGURE U01 ACCESSORY ............ 6-2
FIGURE U11 N656U ............................. 6-6
FIGURE U10 N650U ...................... 6-4
FIGURE U20 N1220U ........................... 6-8
APPENDIX
I.
II.
GENERAL CIRCUIT DIAGRAM
IV. USB CONNECTOR PCB CIRCUIT
(CanoScan N650U/656U) ............... A-1
DIAGRAM
GENERAL CIRCUIT DIAGRAM
(CanoScan N650U/N656U) ............ A-6
(CanoScan N1220U) ...................... A-2
III. MAIN PCB CIRCUIT DIAGRAM
(CanoScan N650U/N656U) ............ A-3
V.
MAIN PCB CIRCUIT DIAGRAM
(CanoScan N1220U) ...................... A-7
VI. USB CONNECTOR PCB CIRCUIT
DIAGRAM (CanoScan N1220U) ... A-10
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1
GENERAL DESCRIPTIONS
I.
FEATURES ..................................... 1-1
A. Preface ..................................... 1-5
II.
SPECIFICATIONS ........................... 1-2
B. Installation .............................. 1-6
III. EXTERIOR FEATURES .................. 1-4
C. Connecting to the Host Computer
A. Front View ............................... 1-4
................................................. 1-7
B. Rear View ................................. 1-4
D. Scanning a Document ............. 1-8
IV. INSTALLATION .............................. 1-5
V.
CUSTOMER’S DAILY MAINTENANCE
................................................. 1-9
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1
I. FEATURES
CanoScan N650U/N656U with 600 x 1200 dpi resolution, CanoScan N1220U with 1200 x
2400 dpi resolution are flatbed image scanners incorporating the following features.
1. High gradation and high image quality are achieved by employing a highly sensitive
contact image sensor with LIDE (LED Indirect Exposure) technology for the scanning unit,
and by reading each RGB color by 14 bits and outputting by 8 bits.
2. The scanner is a small size of 256.0(W) x 372.5(D) x 34.0(H) mm, and a light weight of 1.5
kg by using a downsized scanning unit.
3. The scanner can easily be connected to the host computer through a USB interface.
4. Double hinge structure (Z-lid) enables the document cover to hold a thick document.
5. The scanner can be placed vertically to scan by using an optional stand.
6. The scanner draws its power from USB port on the host computer requiring no AC adapter.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-1
CHAPTER 1
II. SPECIFICATIONS
CanoScan N650U/N656U
MAIN UNIT
· Type
: Flat bed image scanner
READING UNIT
· Image sensor
· Light source
· Max. document size
· Image output
· Resolution
· Scan time
:
:
:
:
:
:
INTERFACE
· Interface
: USB 1.1 (B plug) x 1
OTHERS
· Operating environment
· Power consumption
· Dimensions
· Weight
1-2
COPYRIGHT  2000 CANON INC.
5104 pixels contact image sensor
LED indirect exposure (RGB each)
A4 or Letter (216 x 297 mm)
RGB 8 bits per channel (input 14 bits)
600 x 1200 dpi
112 sec. (color, A4, 600 dpi)
37 sec. (grayscale, A4, 600 dpi)
16 sec. (preview)
: Temperature range, 5 to 35°C
Humidity range, 10 to 90%
Air pressure range, 613 to 1013 hPa
: 2.5W (during operation)
: 256.0(W) x 372.5(D) x 34.0(H) mm
: 1.4 kg
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1
CanoScan N1220U
MAIN UNIT
· Type
: Flat bed image scanner
READING UNIT
· Image sensor
· Light source
· Max. document size
· Image output
· Resolution
· Scan time
:
:
:
:
:
:
INTERFACE
· Interface
: USB 1.1 (B plug) x 1
OTHERS
· Operating environment
· Power consumption
· Dimensions
· Weight
10208 pixels contact image sensor
LED indirect exposure (RGB each)
A4 or Letter (216 x 297 mm)
RGB 8 bits per channel (input 14 bits)
1200 x 2400 dpi
449 sec. (color, A4, 1200 dpi)
149 sec. (grayscale, A4, 1200 dpi)
16 sec. (preview)
: Temperature range, 5 to 35°C
Humidity range, 10 to 90%
Air pressure range, 613 to 1013 hPa
: 2.5W (during operation)
: 256.0(W) x 372.5(D) x 34.0(H) mm
: 1.4 kg
Specifications are subject to change with product improvement.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-3
CHAPTER 1
III. EXTERIOR FEATURES
A. Front View
1
A4
2
LTR
B5
3
q
w
e
r
t
Document Cover
Document Glass
Alignment Mark
Start Button
Carriage Lock
4
B5
A4
LTR
5
Figure 1-1
B. Rear View
q USB Port
1
Figure 1-2
1-4
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1
IV. INSTALLATION
A. Preface
The following installation conditions are required.
1. Ambient temperature should be between 5°C and 35°C, and humidity between 10% and
90%. Avoid locations near water faucets, boilers, humidifiers, or refrigerators.
2. Avoid locations subject to open flame, dust, or direct sunlight. If it is installed near a
window, hang a curtain to block direct sunlight.
3. The room should be well ventilated.
4. Install on a sturdy and level desk, etc.
5. Moving a scanner from a cold place to a warm place can cause condensation on the metal
parts, resulting in a faulty operation. Give the scanner at least one hour to adjust to the
room temperature before unpacking.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-5
CHAPTER 1
B. Installation
1. Unlocking the carriage lock
The scanner is shipped with the scanning unit locked by the carriage lock to prevent
damage during transport. Unlock the scanning unit to use the scanner.
1) Turn the scanner over.
Figure 1-3
2) Push the carriage lock to the unlock mark position.
1
q Carriage Lock
Figure 1-4
3) Return the scanner to its standard position.
Note: Always lock the scanning unit during transport.
1-6
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1
C. Connecting to the Host Computer
The scanner is connected to the USB port on the host computer using a supplied USB cable.
Refer to "Getting Started" for details. For connecting/disconnecting the host computer's
cables, refer to the manual supplied with the host computer.
1) Connect the flat connector (A plug) of the USB cable to the USB port on the host computer.
2) Connect the square connector (B plug) of the USB cable to the USB port on the scanner.
1
2
q USB Port
w USB Cable
Figure 1-5
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-7
CHAPTER 1
D. Scanning a Document
1) Open the document cover.
2) Place a document on the document glass, orienting the image face down and aligning its
top edge with the alignment mark.
A4
LTR
B5
1
34
12
B5
A4
LTR
q Alignment Mark
Figure 1-6
3) Close the document cover, caring not to dislodge the document.
4) Send the "SCAN" command from the host computer to scan.
1-8
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1
V. CUSTOMER'S DAILY MAINTENANCE
Dirt on a document glass or a document cover may cause an unclear image or lines on an
image. Clean the document glass and the document cover using the following procedures.
1) Disconnect the USB cable from the scanner.
2) Wipe the dirt or dust off the document cover with a soft clean cloth dampened with water
and well wrung, then thoroughly wipe water off with a dry cloth.
3) Wipe the document glass with a dry cloth caring not to leave wiper marks.
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-9
CHAPTER 2
OPERATION AND TIMING
I.
II.
D. Drive Motor Control Circuit
BASIC OPERATION ........................ 2-1
A. Functions ................................ 2-1
............................................... 2-16
B. Outline of Electrical System ... 2-2
III. IMAGE PROCESSING SYSTEM .... 2-17
C. Main PCB Input and Output ... 2-3
A. Outline .................................. 2-17
D. Basic Sequences .................... 2-4
B. Image Processing Functions .......
OPTICAL SYSTEM ....................... 2-11
............................................... 2-18
A. Outline .................................. 2-11
IV. CONTROL SYSTEM ..................... 2-20
B. Document Scanning Sequence ....
A. Outline .................................. 2-20
............................................... 2-12
B. Outline of USB ...................... 2-21
C. Contact Image Sensor ........... 2-13
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V.
POWER SUPPLY ........................... 2-23
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
I. BASIC OPERATION
A. Functions
The scanner functions are divided into the three main blocks of optical system, image
processing system, and control system.
Contact image
sensor
Host computer
Drive motor
Optical system
Control system
Image processing system
Figure 2-1
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-1
CHAPTER 2
B. Outline of Electrical System
Figure 2-2 shows the outline of electrical system. CPU is not equipped in the main PCB.
The device driver installed in the host computer includes a control program, which functions
as CPU.
Image signals read by the contact image sensor are converted into digital data by the A/D
converter in the gate array. The converted image data are image-processed by the gate array,
then output to the host computer via USB port.
Host computer
J1
USB Connector
PCB
Control
program
J2
Drive motor
Main PCB
Buffer
RAM
M1
J1
Start button
J2
S1
Contact
image
sensor
CS1
Home position
sensor
Gate array
J3
Q4
Figure 2-2
2-2
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
C. Main PCB Input and Output
Main PCB
USB connector PCB
To host computer
J1-1
-2
-3
-4
J2-1
-2
-3
-4
-5
-6
-7
-8
Vbus
DD+
GND
J1-1
-2
-3
-4
-5
-6
-7
-8
J2-1
-2
-3
-4
M1
GND
+5V
GND
DD+
GND
+5V
+5V
PA+
PBPB+
PA-
Drive motor drive signal
Drive motor
J3-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
CS1
Vob
Misc6
GND
Vcis
Vref
TR
PHI1
Vled
BEN
GEN
REN
GND
Contact image sensor
Q4
Home
position
sensor
HPSEN "H" when scanning unit is in home position
GND
S1
SCANSW "L" when start button was pressed
GND
Start
button
Figure 2-3
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-3
CHAPTER 2
D. Basic Sequences
The basic sequences of the scanner are divided into power ON sequence, calibration
sequence, and document scanning sequence.
1. Power ON sequence
Power ON
Sets gate array
Sets analog power
Checks PCB ID
Checks CIS
Tests gate array
read/write
Gate array read/write
was tested normally?
NO
Sets error flag
YES
Scanning unit is in home
position?
NO
Returns scanning unit
YES
Scanning unit returned
to the home position?
YES
NO
Returned more
than 300 mm?
NO
YES
Sets error flag
Stops scanning unit
1
Figure 2-4-1
2-4
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
1
Moves scanning unit
forward by x pulses
Scanning unit is off
the home position?
NO
Sets error flag
YES
Returns scanning
unit by x pulses
LED ON
Adjusts LED ON
period for white
mark area detection
LED ON period
was adjusted normally?
NO
Sets error flag
YES
Detects white mark area
White mark area
was detected normally?
YES
NO
Sets error flag
LED OFF
Standby
Figure 2-4-2
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-5
CHAPTER 2
When the scanner is powered ON, it performs hardware setting, home position detection, and
border detection between black and white according to the flowchart shown in Figure 2-4.
1) Hardware setting
Gate array and buffer RAM in the main PCB are checked if they function normally.
2) Home position detection/Border detection between black and white
The scanner detects the home position by the home position sensor by using a black mark
area and white mark area in the rear of the document glass.
Firstly the home position sensor defines the home position, where the scanning unit reads a
black mark area.
Secondly, the border between a white mark area and black mark area is detected. The
scanning unit moves forward reading image signals with the LED of the contact image sensor
turned ON. When the scanning unit has reached the white mark area, and the peak value of the
light intensity to the scanning unit has reached a white level, the scanning unit stops to define
there as the border between a black mark area and white mark area. The number of steps of the
drive motor is calculated to define the distance from the home position to the white mark area.
Black mark area
Document glass (rear side)
White mark area
Figure 2-5
When the hardware setting, home position detection and border detection between black
and white have completed, the scanner is on standby to wait for a command from the host
computer.
2-6
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
2. Calibration sequence
Standby
Corrects black level
Black level was
corrected normally?
NO
Sets error flag
YES
Obtains 32 lines of data
Data was
obtained normally?
NO
YES
Sets error flag
Composes black
calibration data
Sets black calibration
data to gate array
Black calibration data was
set to gate array normally?
YES
NO
Sets error flag
2
Figure 2-6-1
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2-7
CHAPTER 2
2
Moves scanning unit
to white mark area
Scanning unit moved to
white mark area normally?
NO
Sets error flag
YES
Adjusts LED ON period
LED ON
period was adjusted
normally?
NO
Sets error flag
YES
LED ON
Obtains 16 lines of data
Data was
obtained normally?
YES
NO
Sets error flag
Composes white
calibration data
LED OFF
Moves scanning unit
to the home position
Stores white calibration
data as a file
Standby
Figure 2-6-2
2-8
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CHAPTER 2
When the host computer sends a calibration command, the scanner performs the
calibration. Calibration is to compose black calibration data and white calibration data by
reading the black mark and white mark in the rear of the document glass as color references
for the proper color reading.
1) Black calibration data composition
Black calibration data is composed by reading and averaging 32 lines of output from the
scanning unit with the LED turned OFF.
2) White calibration data composition
White calibration data is composed by reading 16 lines of each red, green and blue of the
white mark, and averaging the highest 8 lines of output.
Above procedure is performed at high image quality color 600 dpi, color 600/300 dpi, and
grayscale 600/300 dpi and the data is stored as a file in the host computer. For grayscale
600/300 dpi, only green data is processed.
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2-9
CHAPTER 2
3. Document scanning sequence
Standby
LED ON
Moves scanning unit to the
vertical scan start position
Starts document scan
Scan cancellation
is required?
YES
NO
NO
All document lines
were scanned?
YES
LED OFF
Returns scanning unit
NO
Scanning unit returned
to the home position?
YES
Stops drive motor
Image data
was transmitted?
NO
YES
Standby
Figure 2-7
2 - 10
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CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
II. OPTICAL SYSTEM
A. Outline
The optical system includes the functions of moving the scanning unit by the drive motor,
exposing a document by the LED, and collecting the reflected light to the phototransistor array.
Contact image sensor is adopted for the scanning unit, which is a module combined with the
LED for light exposing, the lens array for light collecting, and the phototransistor array for light
receiving to read per line. The drive motor runs by the drive signal sent from the main PCB
and drives the scanning unit via the drive pulley and drive wire.
Sliding rod
Contact image sensor
Drive wire
Drive motor
Drive pulley
Figure 2-8
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2 - 11
CHAPTER 2
B. Document Scanning Sequence
SEQUENCE
STBY
HPDET
STUP
SCFW
SCAN
SCRTN
STBY
Scan command is received
8 sec.
Times required (s)
Drive motor (M1)
LED ON signal
Interface signal
(Data 1-8)
Scanning unit position
Home position
Border between
black and white
Document scan area
(A4, 1200dpi, 100%, 24bit color)
: Reverse
Figure 2-9
Sequence
Purpose
After a power on sequence
is completed until the
scanner receives a scan
command from the host
computer.
After the scanner received a
scan command until the
home position is detected.
To maintain the scanner
ready for scan.
STUP
(Setup)
After the home position is
detected until document
scan starts.
To make a gate array setting,
buffer RAM initialization, etc.
as a preparation for scan.
SCFW
(Scanning unit
forward)
After the scanning unit
starts moving forward
until it reaches the
starting position of the
scan area specified by the
host computer.
To move the scanning unit
with a uniform speed to the
vertical scanning position
specified by the host
computer.
SCAN
(Document
scan)
After the scanning unit
starts scanning until all
area specified by the host
computer are scanned.
To perform various image
processing according to the
command from the host
computer and transmit the
image data during scan.
SCRTN
(Scanning unit
return)
After the scanning unit
starts moving backward
until it returns to the
home position.
To return the scanning unit
to the home position to
ready for the next scan.
STBY
(Standby)
HPDET
(Home position
detection)
To detect the home position
and a border between black
and white.
Remarks
If the border detection between
black and white is failed, the
scanning unit stops there and
proceeds to the next step.
The home position is detected
by the home position sensor.
Table 2-1
2 - 12
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CHAPTER 2
C. Contact Image Sensor
1. Structure of the contact image sensor
Figure 2-10 shows an overview of the contact image sensor with LIDE technology. The
contact image sensor has the LED for exposing a document on the end of glass part called the
light conductor section. When the LED is turned ON, the LED light is supplied to the light
conductor section which exposes a document. That is, the LED light indirectly exposes a
document through the light conductor section. This is called LIDE (LED Indirect Exposure).
The light reflected from the document is collected by the phototransistor array through the rod
lens array and is read as an image signal.
Reading position
Light conductor section
Rod lens array
LED
Phototransistor array
Figure 2-10
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2 - 13
CHAPTER 2
Figure 2-11 shows a cross-sectional view of the contact image sensor.
Scanning direction
Reading position
Illuminated light
Reflected light
Light conductor
section
B
G
Light reflector
section
R
Rod lens array
Phototransistor array
(Light receiver section)
Figure 2-11
The contact image sensor for CanoScan N650U/N656U places 15 phototransistor arrays of
344 light phototransistors each in line, and the contact image sensor for CanoScan N1220U
places 15 phototransistor arrays of 688 light phototransistors each in line. Each
phototransistor converts the received light into an image signal and outputs the data per line
in series.
Image signal
Image
signal
output
Phototransistor
array
Sensor
drive
circuit
Phototransistor
array
Phototransistor
array
Phototransistor
array
Rod lens array
R
G
B
LED
Figure 2-12
2 - 14
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CHAPTER 2
2. Image scanning operation
When the contact image sensor moves to the image scanning position, the control program
turns the SP signal to "L" three times per line to light the LED in order of red, green and blue,
and reads the image signal corresponding to each red, green and blue lights. The reading cycle
of 1 line is 15.48 msec.
When scanning a grayscale image, only green LED is ON and the image signal is processed.
5.16ms 5.16ms 5.16ms
SP
RLED
GLED
BLED
Image signal
output
R
G
B
R
G
B
R
Figure 2-13
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2 - 15
CHAPTER 2
D. Drive Motor Control Circuit
Figure 2-14 shows a block diagram of the drive motor control circuit. The control program
analyzes each command sent from the host computer and sends a command to generate motor
clock to the gate array. The gate array generates the four phase motor drive pulse signals
(MA+, MA-, MB+, MB-), which are sent to the drive motor via the motor driver.
When the host computer changes the resolution, the control program sets to change the
frequency of the motor drive pulse signals for the gate array, then changes the rotating speed
of the drive motor.
Host computer
Control program
Main PCB
Drive motor
MA+
MB-
Gate array
MB+
MA-
Motor
driver
PA+
J2-1
PB-
-2
PB+
-3
PA-
-4
M1
Figure 2-14
2 - 16
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CHAPTER 2
III. IMAGE PROCESSING SYSTEM
A. Outline
Figure 2-15 shows a block diagram of the main functions of the image processing system.
The image processing system converts the signals read by the contact image sensor into digital
data, performs various image processing, and outputs the data to the host computer via USB
port.
1. Contact
image sensor
5. Gamma
correction
2. A/D
conversion
6. Packing
3. Resolution
conversion
4. Calibration
To host computer
Figure 2-15
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2 - 17
CHAPTER 2
B. Image Processing Functions
1. Contact image sensor
The gate array outputs clock signals based on the command from the control program to the
contact image sensor. The contact image sensor lights the LED in order of red, green and blue
according to the clock signals, then outputs 1 line of image signal proportional to the light
intensity received by the phototransistor.
2. A/D conversion
Analog image signals output from the contact image sensor are converted into the digital
image data of 14 bits each by A/D converter in the gate array in order of red image signal,
green image signal, and blue image signal.
3. Resolution conversion
1) Resolution conversion in the horizontal scanning direction
Basic resolution of CanoScan N650U/N656U is 600 dpi, and selective at 600 dpi, 300 dpi,
150 dpi, 75 dpi. Basic resolution of CanoScan N1220U is 1200 dpi, and selective at 1200 dpi,
600 dpi, 300 dpi, 150 dpi, 75 dpi. Resolution conversion in the horizontal scanning direction
is performed by averaging the thinned data and output data.
Example: To change the resolution to 1/2, image data is converted as shown in Figure 2-16.
A
B
A+B
2
C
C+D
2
D
E
F
E+F
2
G
H
G+H
2
Figure 2-16
2) Resolution conversion in the vertical scanning direction
The control program changes the scanning unit moving speed to change the resolution in
the vertical scanning direction. When increasing the resolution, the scanning unit moves at a
low speed to read more lines as shown in Figure 2-18.
Sampling point
Moving direction
Scanning unit
Figure 2-17
Sampling point
Moving direction
Scanning unit
Figure 2-18
2 - 18
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CHAPTER 2
When decreasing the resolution, the scanning unit moves at a fast speed to read less lines.
Sampling point
Moving direction
Scanning unit
Figure 2-19
4. Calibration
When the contact image sensor reads a document of an even density, the image signal
corresponding to each pixel is not uniform for the following reasons.
1) Light intensity of LED is not uniform.
2) There is variation in the sensitivity of the phototransistors.
3) There is a slight output from the phototransistors even when there is no input.
These variations are corrected by the calibration. Calibration data is used as standard
density data when scanning a document. Scanned image data is compared to the standard
density data for the image data correction. The calibration converts the image data from 14
bits to 12 bits each color.
5. Gamma correction
Calibrated red, green and blue image data are divided uniformly into 4096 gradations
according to the document density. The contrast and density of this image data are adjusted
by the gamma correction. The gate array writes gamma curve specified by the control program
into the buffer RAM before scanning a document. Image scan starts and the image data input
to the buffer RAM is converted to 8 bits by the gamma curve data and is output.
6. Packing
Processed image data is temporarily stored in the buffer RAM before sent to the host
computer. The buffer RAM is divided into the writing block and reading block. While data is
written into the writing block, the data is read from the reading block. When fixed volume has
been written, the writing switches to the reading.
Input
Buffer RAM I (for writing)
Buffer RAM II (for reading)
Output
Fixed volume has been written
Buffer RAM I (for reading)
Input
Output
Buffer RAM II (for writing)
Figure 2-20
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2 - 19
CHAPTER 2
IV. CONTROL SYSTEM
A. Outline
The control system consists of the gate array, buffer RAM (4Mbit), and ROM (2Mbit). The
CPU is not equipped with the scanner. The control program in the device driver installed on
the host computer controls the scanner operation by setting a comand directly to the gate
array register. Buffer RAM is used as a work memory for image processing.
The scanner communicates with the host computer via USB interface in the gate array.
gate array
A0-7
Host computer
Buffer
RAM
D0-15
Control program
USB
I/F
ROM
Control signal
Figure 2-21
2 - 20
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CHAPTER 2
B. Outline of USB
The scanner is connected to the host computer via USB. USB (Universal Serial Bus) is the
next generation general-purpose input-output interface to connect the computer peripheral
devices.
1. Features of USB
1) Connects peripheral devices to a computer.
2) Connects up to 127 devices by a tree structure.
3) Connects by 12 Mbps of "full speed mode" or 1.5 Mbps of "low speed mode". This scanner is
conforming to "full speed mode".
4) Supports hot plug (connectable/disconnectable with the power ON).
5) The scanner power is supplied through USB.
2. Connection of USB Devices
USB devices are connected to a host computer by a tree structure consisting of device
called "node" and "hub" which is a group of "node" as shown in Figure 2-22. The tree
structure has the following conditions.
1) Able to connect up to 127 "node" and "hub" in total.
2) Limited up to 6 layers.
3) USB cable must be 5 meters or shorter.
Host computer
Layer 1
Hub 1
Node
Layer 2
Hub 2
Node
Node
Layer 3
Hub 3
Hub 6
Node
Layer 4
Hub 4
Node
Node
Layer 5
Hub 5
Node
Layer 6
Node
Node
Figure 2-22
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2 - 21
CHAPTER 2
USB connector has A plug for connecting to upper stream and B plug for connecting to
lower stream.
A Plug
B Plug
Figure 2-23
3. USB Data Transfer
USB data is transferred in the
1) Token packet
: Used
2) Handshake packet : Used
3) Data packet
: Used
4) Special packet
: Used
following four data structures called "packet".
to start a data transfer
to report the status of a data transfer
to send and receive data
for other transfer
USB device may support multiple data transfer endpoints, so there are four types of data
transfer protocols.
1) Isochronous transfer : Allocates a data transfer time to a device. Highest priority is give
but any error is not corrected.
2) Interrupt transfer
: Periodically transfers data within a specified waiting time. Second
priority is given.
3) Control transfer
: Used to configure the host computer when USB device is attached/
removed.
4) Bulk transfer
: Lowest priority is given but larger amounts of data is sequentially
transferred to a free bus.
This scanner uses control transfer and bulk transfer.
2 - 22
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CHAPTER 2
V. POWER SUPPLY
The scanner draws its power +5V from USB interface. +5V is used for the digital circuit in
the main PCB.
Power supply to the analog circuit is ON/OFF controlled by the gate array. Drive motor,
contact image sensor, and analog circuit are supplied with power as necessary. 5.5V step up
circuit in the main PCB is used for the analog circuit and for driving the contact image sensor.
Host comuter
Main PCB
Drive motor
USB
port
+5V
5.5V step up circuit
LED
5.0V reference voltage
Gate
array
Contact image
sensor
Analog circuit
Digital circuit
Figure 2-24
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2 - 23
CHAPTER 3
MECHANICAL SYSTEM
I.
II.
EXTERNALS .................................. 3-1
III. OPTICAL SYSTEM ......................... 3-9
A. Covers ...................................... 3-1
A. Contact Image Sensor ............. 3-9
DRIVE SYSTEM .............................. 3-5
IV. ELECTRICAL SYSTEM ................ 3-11
A. Drive Unit ................................ 3-5
A. USB Connector PCB .............. 3-11
B. Drive Wire ................................ 3-8
B. Flat Cable .............................. 3-13
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CHAPTER 3
I. EXTERNALS
When cleaning, checking or repairing inside the scanner, remove the necessary covers using
the following procedures.
A. Covers
1
A4
LTR
2
B5
3
B5
A4
LTR
q Document Cover
w Document Glass Unit
e Base Frame
Figure 3-1
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3-1
CHAPTER 3
1. Removing the document cover
1) Pull the hinge unit of the document cover to the left, remove the right hinge unit, then warp
the document cover to remove.
3
1
1
A4
LTR
B5
2
2
B5
A4
LTR
q Document Cover
w Hinge
Figure 3-2
3-2
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CHAPTER 3
2. Removing the document glass unit
1) Remove the document cover.
2) Unhook the hook in the end of the document glass unit, then lift the hook part.
1
LTR
B5
2
A4
B5
A4
LTR
q End Hook
w Document Glass Unit
Figure 3-3
Note: Do not lift the hook part excessively since it is attached to the document glass with a
double-sided tape.
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3-3
CHAPTER 3
3) Unhook the hook in the front of the document glass unit, then slide the document glass unit
backward.
2
LTR
B5
A4
B5
A4
LTR
1
q Front Hook
w Document Glass Unit
Figure 3-4
4) Lift the front of the document glass unit, then pull forward to remove it.
LTR
1
B5
A4
B5
A4
LTR
q Document Glass Unit
Figure 3-5
Note: Take care not to smear the rear side of the document glass unit (especially the spacer
sliding surface).
3-4
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CHAPTER 3
II. DRIVE SYSTEM
A. Drive Unit
1. Removing the drive unit
1) Remove the document cover.
2) Remove the document glass unit.
3) Remove the seal from the back of the scanner, push the wire stopper backward to remove it
from the base frame through the left hole.
1
2
q Wire Stopper
w Seal
Figure 3-6
Note: Do not damage or lose the seal to reuse it.
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3-5
CHAPTER 3
4) Remove two spacers on both ends of the contact image sensor.
1
q Spacer
Figure 3-7
5) Lift the drive unit end part, then remove the drive wire from the gear.
6) Move the drive unit to the center, then disconnect the connector J3.
1
q Connector J3
Figure 3-8
7) Remove the contact image sensor (refer to III-A-1).
8) Lift the drive unit to remove it.
3-6
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CHAPTER 3
2. Precautions when attaching the drive unit
1) Apply appropriate amount of grease to the positions marked with net in the figure 3-9.
Figure 3-9
2) Locate the drive wire referring to II-B-2.
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3-7
CHAPTER 3
B. Drive Wire
1. Removing the drive wire
1) Remove the document cover.
2) Remove the document glass unit.
3) Remove the drive unit.
4) Remove the wire spring to remove the drive wire.
1
q Drive Wire
Figure 3-10
2. Precautions when attaching the drive wire
1) When the drive wire is twisted, untwist it to a natural condition. Otherwise a twisted drive
wire can affect an image.
2) Locate the drive wire as shown in Figure 3-11.
Figure 3-11
3-8
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CHAPTER 3
III. OPTICAL SYSTEM
A. Contact Image Sensor
1. Removing the contact image sensor
Note: Take care not to touch the phototransistor of the contact image sensor.
1) Remove the document cover.
2) Remove the document glass unit.
3) Remove the seal from the back of the scanner unit, push the wire stopper backward to
remove it from the base frame through the left hole as shown in Figure 3-6.
4) Remove two spacers on both ends of the contact image sensor.
5) Lift the drive unit end part, then remove the drive wire from the gear.
6) Move the drive unit to the center.
7) Hold up the front of the contact image sensor, slide it to the right, then lift it to remove.
2
1
Figure 3-12
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3-9
CHAPTER 3
8) Remove the sensor cable from the ontact image sonsor, then remove the contact image
sensor.
1
2
3
q Contact Image Sensor
w Sensor Cable
e Spring
Figure 3-13
Note: Do not lose the spring under the contact image sensor.
3 - 10
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CHAPTER 3
IV. ELECTRICAL SYSTEM
A. USB Connector PCB
1. Removing the USB connector PCB
1) Remove the document cover.
2) Remove the document glass unit.
3) Insert flat-blade screw drivers into both sides of the USB connector PCB to push it forward.
Figure 3-14
4) Disconnect the connector J2 to remove the USB connector PCB.
1
q Connector J2
Figure 3-15
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3 - 11
CHAPTER 3
2. Precautions when attaching the USB connector PCB
1) Make sure to contact the ground of the USB connector PCB with the sliding rod.
1
2
q Ground
w Sliding Rod
Figure 3-16
3 - 12
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CHAPTER 3
B. Flat Cable
1. Removing the flat cable
Note: Do not bend or deform the flat cable when removing the flat cable.
1) Remove the document cover.
2) Remove the document glass unit.
3) Remove the seal from the back of the scanner unit, push the wire stopper backward to
remove it from the base frame through the left hole as shown in Figure 3-6.
4) Remove two spacers on both ends of the contact image sensor.
5) Lift the drive unit end part, then remove the drive wire from the gear.
6) Move the drive unit to the center, and disconnect the connector J3.
7) Remove the USB connector PCB, and disconnect the connector J2.
8) Pull to remove the flat cable from the ferrite core.
2
1
q Flat Cable
w Ferrite Core
Figure 3-17
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3 - 13
CHAPTER 3
2. Precautions when atttaching the flat cable
1) Take care not to bend or deform the flat cable.
2) Locate the flat cable as follows.
a. The flat cable on the USB connector PCB side is attached with a double-sided tape. Align
the bend in the flat cable with the left end corner of the base frame.
1
q Bend
Figure 3-18
b. Straighten the bent end of the flat cable on the driver unit side and pass it through the
ferrite core.
Figure 3-19
3 - 14
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CHAPTER 3
3) Re-bend the flat cable as shown in Figure 3-20 and connect it to the connector J3.
8mm
Figure 3-20
1
q Connector J3
Figure 3-21
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3 - 15
CHAPTER 4
MAINTENANCE AND SERVICING
I.
II.
PERIODICAL REPLACEMENT
III.
PERIODICAL SERVICING ............ 4-1
PARTS ......................................... 4-1
IV.
SPECIAL TOOLS ......................... 4-1
CONSUMABLE PARTS
V.
SOLVENTS AND LUBRICANTS .... 4-1
DURABILITY ................................ 4-1
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CHAPTER 4
I. PERIODICAL REPLACEMENT PARTS
None
II. CONSUMABLE PARTS DURABILITY
None
III. PERIODICAL SERVICING
None
IV. SPECIAL TOOLS
None
V. SOLVENTS AND LUBRICANTS
Lubricants used for disassembly and assembly of the scanner.
No.
Name
Tool No.
1
Grease
TKC-0955
Usage / Remarks
To be applied to the sliding part between the scanning
unit and sliding rod.
MOLYKOTE EM-50L
Table 4-1
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4-1
CHAPTER 5
TROUBLESHOOTING
I.
II.
INTRODUCTION ............................. 5-1
III. LOCATION OF ELECTRICAL PARTS ..
A. Initial Check ............................ 5-1
................................................. 5-4
B. Others ...................................... 5-1
IV. CANON SCANNER TEST ................ 5-5
TROUBLESHOOTING ..................... 5-2
A. Outline .................................... 5-5
A. Troubleshooting Image Defects ...
B. How To Use Canon Scanner Test .
................................................. 5-2
................................................. 5-5
B. Troubleshooting Malfunctions ....
................................................. 5-3
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CHAPTER 5
I. INTRODUCTION
A. Initial Check
Check if the operating environment conforms to the following conditions.
1. Line voltage is within ±10% of the rated value.
2. Ambient temperature and humidity conform to the operating environment. (Refer to
CHAPTER 1, II. SPECIFICATIONS)
3. The scanner is not installed near a water faucet, boiler, humidifier, open flame, or in dusty
place.
4. The scanner is not exposed to direct sunlight. If it must be installed by a window, hang a
curtain to block direct sunlight.
5. The scanner is installed in a well-ventilated place.
B. Others
Moving a scanner from a cold place to a warm place can cause condensation on the metal
parts, resulting in a faulty operation.
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5-1
CHAPTER 5
II. TROUBLESHOOTING
Causes and corrective actions for possible image defects and malfunctions during operation
are described below.
A. Troubleshooting Image Defects
1. Image not output
Cause 1
: Faulty connection of the USB cable
Corrective action : Securely connect the USB cable.
Cause 2
: Faulty contact image sensor
Corrective action : Replace the contact image sensor.
Cause 3
: Faulty main PCB
Corrective action : Replace the drive unit.
2. Uneven image density or lines
Cause 1
: Dirt on the document cover or document glass
Corrective action : Clean the document cover or document glass.
Cause 2
: Faulty calibration data
Corrective action : Perform the calibration.
Cause 3
: External light is entering into the scanner. External light entering into
the contact image sensor can cause uneven image density.
Corrective action : Fully close the document cover. If it is impossible, cover with a sheet
etc. to prevent external light.
Cause 4
: Faulty contact image sensor
Corrective action : Replace the contact image sensor.
Cause 5
: Faulty main PCB
Corrective action : Replace the drive unit.
5-2
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CHAPTER 5
B. Troubleshooting Malfunctions
1. Host computer not detecting the scanner
Cause 1
: Faulty installation of the device driver
Corrective action : Uninstall the device driver and reinstall it.
Cause 2
: Faulty connection of the USB cable
Corrective action : Securely connect the USB cable to the scanner and host computer.
Cause 3
: Faulty main PCB
Corrective action : Replace the drive unit.
2. Scanner not operating
Cause 1
: Carriage lock is locked.
Corrective action : Unlock the carriage lock.
Cause 2
: Faulty connection of the flat cable
Corrective action : Securely connect the flat cable to the contact image sensor and main
PCB.
Cause 3
: Faulty contact image sensor
Corrective action : Replace the contact image sensor.
Cause 4
: Faulty main PCB
Corrective action : Replace the drive unit.
3. Drive motor not running
Cause 1
: Faulty connection of the connector J2
Corrective action : Securely connect the connector J2.
Cause 2
: Faulty drive motor
Corrective action : Replace the drive unit.
Cause 3
: Faulty main PCB
Corrective action : Replace the drive unit.
4. LED of the contact image sensor not lighting
Cause 1
: Faulty connection of the connector
Corrective action : Securely connect the flat cable.
Cause 2
: Faulty contact image sensor
Corrective action : Replace the contact image sensor.
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5-3
CHAPTER 5
III. LOCATION OF ELECTRICAL PARTS
1
2
3
4
5
6
q
w
e
r
t
y
USB Connector PCB
Main PCB
Contact Image Sensor
Home Position Sensor
Start Button
Drive Motor
Figure 5-1
5-4
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
IV. CANON SCANNER TEST
A. Outline
Canon Scanner Test is utility software to check if faulty scanner operation is due to
hardware or communication with a host computer.
Windows
: ScanTest.exe (English/Japanese is switched according to the language to be
used in Windows.)
Macintosh : ScantestHMe
B. How To Use Canon Scanner Test
1. Operating environment
Windows platform
1) CanoScan N650U/N656U/N1220U
2) PC/AT Compatibles (Pentium or faster is recommended.)
3) Windows 98 Operating System
4) Scanner Device Driver
Macintosh platform
1) CanoScan N650U/N656U/N1220U
2) Power Macintosh
3) Macintosh OS (Version 8.5 or later)
4) Scanner Device Driver
Note: Install the scanner device driver before using the Canon Scanner Test.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
5-5
CHAPTER 5
2. Functions
Canon Scanner Test has the following functions.
1) USB Information (Windows only)
Scanner information recognized by Windows.
2) Scanner Information
Product ID, ROM version, etc. are shown when the scanner is properly communicated with
the host computer.
3) Scanner Self Test
Scanner self test is performed.
4) Calibration
Scanner calibration is performed.
5) Scan
Any image is scanned and saved as an image file in the same folder with the Canon Scanner
Test.
5-6
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
3. Functions descriptions
1) USB Information (Windows only)
Select "USB Information" from the "Function" menu to display as shown in Figure 5-2.
Figure 5-2
·
·
·
·
Vendor Description
Device Description
Port Name
Local Name
COPYRIGHT  2000 CANON INC.
:
:
:
:
Manufacturer name (Canon) of the scanner connected.
Product name of the scanner connected.
Port name of the scanner recognized by Windows.
Product name of the scanner connected.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
5-7
CHAPTER 5
2) Scanner Information
Select "Scanner Information" from the "Function" menu to display as shown in Figure 5-3
(Windows) or Figure 5-4 (Macintosh).
Figure 5-3
Figure 5-4
· Vendor ID
· Product ID
· ROM Version
5-8
: Manufacturer name (Canon) of the scanner connected.
: Product name of the scanner connected.
: Scanner controller version.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
3) Scanner Self Test
Select "Scanner Self Test" from the "Function" menu to display a dialog as shown in Figure
5-5 (Windows) or Figure 5-6 (Macintosh).
Figure 5-5
Figure 5-6
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
5-9
CHAPTER 5
Click "OK" to perform Scanner Self Test. When it has completed normally, a dialog as
shown in Figure 5-7 (Windows) or Figure 5-8 (Macintosh) is displayed.
Figure 5-7
Figure 5-8
5 - 10
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
4) Calibration
Select "Calibration" from the "Function" menu to display a dialog as shown in Figure 5-9
(Windows) or 5-10 (Macintosh).
Figure 5-9
Figure 5-10
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
5 - 11
CHAPTER 5
Click "OK" to perform Calibration. When it has completed normally, a dialog as shown in
Figure 5-11 (Windows) or Figure 5-12 (Macintosh) is displayed.
Figure 5-11
Figure 5-12
5 - 12
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
5) Scan
Select "Scan" from the "Function" menu to display a dialog as shown in Figure 5-13
(Windows) or Figure 5-14 (Macintosh).
Figure 5-13
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
5 - 13
CHAPTER 5
Figure 5-14
* Scan count
* Resolution
* Image
: Specify the number of scan.
: Select a resolution for the image to be scanned.
: Select a processing method of the scanned image. When "Read in memory (no
file)" is selected, scanned image is read into the memory, then abandoned
after readout. When "Save to TIFF file" is selected, the file of "img0.tif" is set
up in the same folder with the Canon Scanner Test.
File capacity is as follows.
75 dpi : Approx. 1.6 MByte
150 dpi : Approx. 6.5 MByte
300 dpi : Approx. 26.2 MByte
600 dpi : Approx. 104.9 MByte
1200 dpi : Approx. 15.0 MByte
Note: Confirm before scanning that the available disk space on the HDD in which the
Canon Scanner Test is installed exceeds above file capacity.
5 - 14
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
4. Error Message
Causes and corrective actions for error messages which may occur during Canon Scanner
Test are described below.
1) When Canon Scanner Test is started, "Unable to find USB scanner" is displayed.
Cause 1
: Device driver for the scanner is not installed in the host computer.
Corrective action : Install the device driver.
Cause 2
: Scanner is not detected by the host computer.
Corrective action : Properly detect the scanner by the host computer.
2) Scanner Information is not displayed or Scanner Self Test terminates without scan
operation.
Cause 1
: Carriage lock is locked.
Corrective action : Unlock the carriage lock.
Cause 2
: Scanner is not detected by the host computer.
Corrective action : Properly detect the scanner by the host computer.
Cause 3
: Faulty flat cable.
Corrective Action : Check the flat cable connector. If it is normal, replace the flat cable.
Cause 4
: Faulty contact image sensor.
Corrective Action : Replace the contact image sensor.
Cause 5
: Faulty main PCB.
Corrective Action : Replace the drive unit.
3) "Carriage lock is locked" is displayed.
Cause 1
: Carriage lock is locked.
Corrective Action : Unlock the carriage lock.
Cause 2
: Faulty drive motor/faulty home position sensor.
Corrective Action : Replace the drive Unit.
4) "Unable to open file" is displayed.
Cause
: Canon Scanner Test is started from a CD-ROM or write-protect HDD.
Corrective Action : Copy the Canon Scanner Test on a writable HDD to use.
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
5 - 15
CHAPTER 6
PARTS CATALOG
FIGURE U01 ACCESSORY ............ 6-2
FIGURE U11 N656U ............................. 6-6
FIGURE U10 N650U ...................... 6-4
FIGURE U20 N1220U ........................... 6-8
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
(Brank Page)
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-1
FIGURE U01
ACCESSORY
1
2
3
6-2
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
R
A
N
K
Q'
T
Y
FIGURE
&
KEY NO.
PART NUMBER
U01-01
104-0138-0SP
1
CABLE, USB
02
002-0827-0SP
1
STAND ASSEMBLY
03
003-7204-0SP
1
TAPE
COPYRIGHT  2000 CANON INC.
DESCRIPTION
SERIAL NUMBER/REMARKS
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-3
N650U
FIGURE U10
1
LTR
B5
2
3
4
8
B
5
5
A4
LTR
A4
6
7
9
10
15
11
16
12
13
14
17
18
6-4
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
R
A
N
K
Q'
T
Y
FIGURE
&
KEY NO.
PART NUMBER
U10-01
002-0820-0SP
1
DOCUMENT COVER ASSEMBLY
02
002-0821-0SP
1
PLATEN GLASS ASSEMBLY
03
051-0508-0SP
1
SPACER
04
060-0121-000
1
CONTACT IMAGE SENSOR
05
003-5248-0SP
1
SENSOR DRIVE ASSEMBLY
06
104-0152-000
1
CABLE, FLAT, 12P
07
056-0032-000
1
SPRING
08
104-0151-000
1
CABLE, FLAT, 8P
09
NPN
1
SLIDING ROD
10
003-5250-0SP
1
WIRE
11
051-0506-000
1
HOOK
12
077-0632-000
2
SCREW
13
054-0231-000
1
PLATE, BUTTON
14
051-0505-000
1
BUTTON, FUNCTION
15
004-0393-000
1
USB I/F PCB ASSEMBLY
16
084-5505-0SP
1
SEAL
17
NPN
1
BASE FRAME
18
051-0574-000
1
LOCK, CARRIAGE
COPYRIGHT  2000 CANON INC.
DESCRIPTION
SERIAL NUMBER/REMARKS
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-5
N656U
FIGURE U11
1
LTR
B5
2
3
4
8
B5
A4
LTR
5
A4
6
7
9
10
15
11
16
12
13
14
17
18
6-6
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
R
A
N
K
Q'
T
Y
FIGURE
&
KEY NO.
PART NUMBER
U11-01
002-0883-0SP
1
DOCUMENT COVER ASSEMBLY
02
002-0896-0SP
1
PLATEN GLASS ASSEMBLY
03
051-0508-0SP
1
SPACER
04
060-0121-000
1
CONTACT IMAGE SENSOR
05
003-5248-0SP
1
SENSOR DRIVE ASSEMBLY
06
104-0152-000
1
CABLE, FLAT, 12P
07
056-0032-000
1
SPRING
08
104-0151-000
1
CABLE, FLAT, 8P
09
NPN
1
SLIDING ROD
10
003-5252-0SP
1
WIRE
11
051-0506-000
1
HOOK
12
077-0632-000
2
SCREW
13
054-0231-000
1
PLATE, BUTTON
14
051-0505-000
1
BUTTON, FUNCTION
15
004-0393-000
1
USB I/F PCB ASSEMBLY
16
084-5509-0SP
1
SEAL
17
NPN
1
BASE FRAME
18
051-0620-000
1
LOCK, CARRIAGE
COPYRIGHT  2000 CANON INC.
DESCRIPTION
SERIAL NUMBER/REMARKS
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-7
N1220U
FIGURE U20
1
LTR
B5
2
3
4
8
B5
A4
LTR
5
A4
6
7
9
10
15
11
16
12
13
14
17
18
6-8
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
R
A
N
K
Q'
T
Y
FIGURE
&
KEY NO.
PART NUMBER
U20-01
002-0884-0SP
1
DOCUMENT COVER ASSEMBLY
02
002-0893-0SP
1
PLATEN GLASS ASSEMBLY
03
051-0508-0SP
1
SPACER
04
060-0122-000
1
CONTACT IMAGE SENSOR
05
003-5249-0SP
1
SENSOR DRIVE ASSEMBLY
06
104-0152-000
1
CABLE, FLAT, 12P
07
056-0032-000
1
SPRING
08
104-0151-000
1
CABLE, FLAT, 8P
09
NPN
1
SLIDING ROD
10
003-5251-0SP
1
WIRE
11
051-0506-000
1
HOOK
12
077-0632-000
2
SCREWS
13
054-0231-0SP
1
PLATE, BUTTON
14
051-0625-000
1
BUTTON, FUNCTION
15
004-0393-000
1
USB I/F PCB ASSEMBLY
16
084-5506-0SP
1
SEAL
17
NPN
1
BASE FRAME
18
051-0617-000
1
LOCK, CARRIAGE
COPYRIGHT  2000 CANON INC.
DESCRIPTION
SERIAL NUMBER/REMARKS
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-9
APPENDIX
I.
GENERAL CIRCUIT DIAGRAM
IV. USB CONNECTOR PCB CIRCUIT
DIAGRAM (CanoScan N650U/N656U) .
(CanoScan N650U/656U) ............... A-1
II.
................................................ A-6
GENERAL CIRCUIT DIAGRAM
(CanoScan N1220U) ...................... A-2
III. MAIN PCB CIRCUIT DIAGRAM
(CanoScan N650U/N656U) ............ A-3
V.
MAIN PCB CIRCUIT DIAGRAM
(CanoScan N1220U) ...................... A-7
VI. USB CONNECTOR PCB CIRCUIT
DIAGRAM (CanoScan N1220U) ... A-10
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
COPYRIGHT  2000 CANON INC.
1
2
3
4
5
6
7
8
9
10
11
12
Contact Image
Sensor
CS1
J3
1
2
3
4
5
6
7
8
9
10
11
12
VOB
MISC6
GND
VCIS
VREF
TR
PHI1
VLED
BEN
GEN
REN
GND
Home Position Sensor
Q4
4 3 2
Drive Motor
M1
S1
J2
1
Start Button
PAPB+
PBPA+
Main PCB
J1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
GND
+5V
GND
DD+
GND
+5V
+5V
1
2
3
4
USB Connector PCB
J2
J1
VBUS
DD+
GND
APPENDIX
I. GENERAL CIRCUIT DIAGRAM (CanoScan N650U/N656U)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
A-1
A-2
COPYRIGHT  2000 CANON INC.
1
2
3
4
5
6
7
8
9
10
11
12
Contact Image
Sensor
CS1
J3
1
2
3
4
5
6
7
8
9
10
11
12
VOB
MISC6
GND
VCIS
VREF
TR
PHI1
VLED
BEN
GEN
REN
GND
Home Position Sensor
Q4
4 3 2
Drive Motor
M1
S1
J2
1
Start Button
PAPB+
PBPA+
Main PCB
J1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
GND
+5V
GND
DD+
GND
+5V
+5V
1
2
3
4
USB Connector PCB
J2
J1
VBUS
DD+
GND
APPENDIX
II. GENERAL CIRCUIT DIAGRAM (CanoScan N1220U)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1
2
3
4
1
2
3
4
A1
A2
A3
A4
A5
A6
A7
A8
A0
RA2
RA1
R1
1
2
3
4
RA3
8
7
6
5
8
7
6
5
(A0 A9)
8
7
6
5
(DGND)
C1
+5VD
13
27
14
29
28
16
17
18
19
22
23
24
25
26
WE
OE
RAS
LCAS
HCAS
A0
A1
A2
A3
A4
A5
A6
A7
A8
PHI1
1
6
20
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
NC
NC
U3
2
3
4
5
7
8
9
10
31
32
33
34
36
37
38
39
11
12
15
30
C91
A0
A1
A2
A3
A4
A5
A6
A7
A8
V
35
37
36
34
40
42
46
48
49
47
45
41
39
38
14
18
20
22
24
26
28
32
33
29
27
25
23
21
19
15
C19
WR
RD
RAS
CAS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
(AGND)
C20
C2
C3
VREG
(AGND)
+5VD
A
NS-USB
(AGND)
C4
+5VD
C5 C6 C7
R9
+5VD
BEN
GEN
REN
C21
C9
C10 C11 C14 C15
C16 C17 C18
A
A
B
B
D+
D-
#1
#2
#3
#4
#5
#6
SCL
SDA
I/O
I/O
I/O
I/O
I/O
I/O
CRYST AL OUT
CRYST AL IN
RESET
BP
ACTIVE/SUSPENDED
EXT CLK/CRYST AL
24/48
MISC
MISC
MISC
MISC
MISC
MISC
PSENSE#1
PSENSE#2
SENSE A
SENSE B
SENSE GND
U2
(DGND)
VREG
82
VCC
VCC
VCC
TP4
3
5
7
OS R
OS G
OS B
VD
VD
VD
VD
VD
56
62
68
86
97
GND
GND
GND
21
35
40
1
2
4
6
96
VBANDGAP
VREF LO
VREF MID
VREF HI
TEST
VDRAM
VDRAM
VDRAM
16
30
43
TR
R18
VA
VA
9
99
79
78
77
76
75
74
73
8
100
58
59
60
LAMP R
LAMP G
LAMP B
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
17
31
44
57
61
69
81
87
98
CP2
CP1
RS
PHI2
PHI1
TR2
TR1
AGND
AGND
91
CMODE
NC
NC
NC
COPYRIGHT  2000 CANON INC.
88
89
92
VOB
52
53
90
85
80
54
55
51
50
84
83
65
66
67
70
71
72
64
63
94
93
95
10
11
12
13
(DGND)
R91
SENA
SENB
C28
R12
D+
D
D-
MISC4
MISC5
MISC6
Y1
R90
SCANSW
MISC2
HPSEN
(MOTOR GND)
C27
C29
R11
R17
+5VD
C31
1
2
3
4
TP8
1
2
3
5
6
8
7
6
5
TP3
R14
R21
+5VD
(DGND)
R19
RA4
(DGND)
A0
A1
A2
SDA
SCL
FB1
(DGND)
R15
TP9
TP
GND
WP
VCC
R10
MA+
MAMB+
MB-
4
7
8
C8
TP10
TP
TP7
C35
+5VD
APPENDIX
III. MAIN PCB CIRCUIT DIAGRAM (CanoScan N650U/N656U)
(1/3)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
A-3
MISC5
+5VD
2
Q16
C42
VPI
4
U1
S1
G1
S2
G2
D1
D1
D2
D2
C22
R29
R27
R22
R20
8
7
6
5
L2
8
7
6
5
R24
D/C
IPK/2
VIN
C/I
U4
R30
B
B
E
E
G
E
B
Q5
Q6
S
D
Q7
S/C
OUT
T/C
GND
E
CQ9
R34
E
CQ8
R33
C
C
MISC5
1
2
3
4
B
B
1
2
3
4
R31
R40
C44
Q2
+
V
C40
D1
R2
R7
HPSEN
+
V55
D+
D-
A
C38
VPI
C13
R28
C41
C23
R26
2
1
2
3
C12
Q1
R25
VPI
VOUT
VCC
GND
CTL
Q3
VIN
R4
R5
2
OUT
3
C
4
5
VAG
+
Q4
C39
C47
R35
R16
VREG
2
1
1
3
3
4
MISC4
+5VD
5
VCC
GND
3
L1
C24
3
4
VSS
4
2
COPYRIGHT  2000 CANON INC.
1
A-4
1
VPI
R6
R13
J1
C32
L3
C50
VCIS
1
2
3
4
5
6
7
8
TP5
C45
R42
C34
FB4
C36
R36
TP6
+5VD
APPENDIX
(2/3)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
C
TR
PHI1
OR
Q17A
VCIS
VCIS
OR
Q17B
R77
R73
R75
R69
C26
VCIS
R39
R38
VCIS
VCIS
VCIS
C25
C43
13
12
9
10
6
5
2
3
V55
VCC
-
+
VEE
11
4
-
+
11
-
+
-
+
R83
14
U12D
VCC
VEE
VCC
VEE
4
11
VCC
VEE
4
11
COPYRIGHT  2000 CANON INC.
4
VAG
8
U12C
7
U12B
1
U12A
R87
R86
R85
R37
VOB
VCIS
C89
+
R3
C87
MISC2
B
B
B
TP2
C90
R8
+
E
CQ15
E
CQ14
E
CQ13
TP1
C46
BEN
R81
GEN
R80
REN
R79
C
E
1
2
3
4
5
6
7
8
9
10
11
12
J3
Q19
B
B
B
B
D3
C37
R92
VAG
R82
E
CQ11
E
CQ10
E
CQ12
SENB
SENA
MISC6
R32
R23
C52
C49
R53
MB MB +
R41
MA +
MA -
C30 +
1
2
3
4
5
1
2
3
4
5
R46
U11
VCC
IN4
IN3
IN1
IN2
U9
VCC
IN4
IN3
IN1
IN2
VPI
S1
OUT4
OUT3
OUT1
OUT2
GND
OUT4
OUT3
OUT1
OUT2
GND
10
9
8
7
6
10
9
8
7
6
R89
R57
(B -)
(B + )
R54
(A + )
(A -)
+5VD
R78
C82
R59
R55
R58
R62
SCANSW
(BUTTON)
J2
PA +
1
PB 2
PB +
3
PA 4
APPENDIX
(3/3)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
A-5
APPENDIX
IV. USB CONNECTOR PCB CIRCUIT DIAGRAM
(CanoScan N650U/N656U)
J2
8
7
6
5
4
3
2
1
C1
D1
F.G.
C3
D2
J1
R1
1
2
3
4
4
1
2
3
R2
D4
VBUS
DD+
GND
D3
C2
C4
L1
A-6
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
1
2
3
4
1
2
3
4
A1
A2
A3
A4
A5
A6
A7
A8
A0
RA2
RA1
R1
1
2
3
4
RA3
8
7
6
5
8
7
6
5
(A0 A9)
8
7
6
5
(DGND)
C1
+5VD
13
27
14
29
28
16
17
18
19
22
23
24
25
26
WE
OE
RAS
LCAS
HCAS
A0
A1
A2
A3
A4
A5
A6
A7
A8
PHI1
1
6
20
NC
NC
NC
NC
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
VCC
VCC
VCC
U3
2
3
4
5
7
8
9
10
31
32
33
34
36
37
38
39
11
12
15
30
C91
A0
A1
A2
A3
A4
A5
A6
A7
A8
V
35
37
36
34
40
42
46
48
49
47
45
41
39
38
14
18
20
22
24
26
28
32
33
29
27
25
23
21
19
15
C19
WR
RD
RAS
CAS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
(AGND)
C20
C2
C3
VREG
(AGND)
+5VD
A
NS-USB
(AGND)
C4
+5VD
C5 C6 C7
R9
+5VD
BEN
GEN
REN
C21
C9
C10 C11 C14 C15
C16 C17 C18
A
A
B
B
D+
D-
#1
#2
#3
#4
#5
#6
SCL
SDA
I/O
I/O
I/O
I/O
I/O
I/O
CRYST AL OUT
CRYST AL IN
RESET
BP
ACTIVE/SUSPENDED
EXT CLK/CRYST AL
24/48
MISC
MISC
MISC
MISC
MISC
MISC
PSENSE#1
PSENSE#2
SENSE A
SENSE B
SENSE GND
U2
(DGND)
VREG
82
GND
GND
GND
21
35
40
TP4
VD
VD
VD
VD
VD
56
62
68
86
97
TR
R18
8
100
VA
VA
9
99
79
78
77
76
75
74
73
VDRAM
VDRAM
VDRAM
16
30
43
CP2
CP1
RS
PHI2
PHI1
TR2
TR1
AGND
AGND
3
5
7
OS R
OS G
OS B
1
2
4
6
96
VBANDGAP
VREF LO
VREF MID
VREF HI
TEST
58
59
60
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
17
31
44
57
61
69
81
87
98
LAMP R
LAMP G
LAMP B
91
CMODE
NC
NC
NC
COPYRIGHT  2000 CANON INC.
88
89
92
VOB
52
53
90
85
80
54
55
51
50
84
83
65
66
67
70
71
72
64
63
94
93
95
10
11
12
13
(DGND)
R91
SENA
SENB
C28
R12
D+
D
D-
MISC4
MISC5
MISC6
Y1
R90
SCANSW
MISC2
HPSEN
(MOTOR GND)
C27
C29
R11
R17
+5VD
C31
1
2
3
4
TP8
1
2
3
5
6
8
7
6
5
TP3
R14
R21
+5VD
(DGND)
R19
RA4
(DGND)
A0
A1
A2
SDA
SCL
FB1
(DGND)
R15
TP9
TP
GND
WP
VCC
R10
MA+
MAMB+
MB-
4
7
8
C8
TP10
TP
TP7
C35
+5VD
APPENDIX
V. MAIN PCB CIRCUIT DIAGRAM (CanoScan N1220U)
(1/3)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
A-7
MISC5
+5VD
2
Q16
C42
VPI
4
U1
S1
G1
S2
G2
D1
D1
D2
D2
C22
R29
R27
R22
R20
8
7
6
5
L2
8
7
6
5
R24
D/C
IPK/2
VIN
C/I
U4
R30
B
B
E
E
G
E
B
Q5
Q6
S
D
Q7
S/C
OUT
T/C
GND
E
CQ9
R34
E
CQ8
R33
C
C
MISC5
1
2
3
4
B
B
1
2
3
4
R31
R40
C44
Q2
+
V
C40
D1
R2
R7
HPSEN
+
V55
D+
D-
A
C38
VPI
C13
R28
C41
C23
R26
2
1
2
3
C12
Q1
R25
VPI
VOUT
VCC
GND
CTL
Q3
VIN
R4
R5
2
OUT
3
C
4
5
VAG
+
Q4
C39
C47
R35
R16
VREG
2
1
1
3
3
4
MISC4
+5VD
5
VCC
GND
3
L1
C24
3
2
4
VSS
4
COPYRIGHT  2000 CANON INC.
1
A-8
1
VPI
R6
R13
J1
C32
L3
C50
VCIS
1
2
3
4
5
6
7
8
TP5
C45
R42
C34
FB4
C36
R36
TP6
+5VD
APPENDIX
(2/3)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
C
TR
PHI1
OR
Q17A
VCIS
VCIS
OR
Q17B
R77
R73
R75
R69
C26
VCIS
R39
R38
VCIS
VCIS
VCIS
C25
C43
13
12
9
10
6
5
2
3
V55
VCC
-
+
VEE
11
4
-
+
11
-
+
-
+
R83
14
U12D
VCC
VEE
VCC
VEE
4
11
VCC
VEE
4
11
COPYRIGHT  2000 CANON INC.
4
VAG
8
U12C
7
U12B
1
U12A
R87
R86
R85
R37
VOB
VCIS
C89
+
R3
C87
MISC2
B
B
B
TP2
C90
R8
+
E
CQ15
E
CQ14
E
CQ13
TP1
C46
BEN
R81
GEN
R80
REN
R79
C
E
1
2
3
4
5
6
7
8
9
10
11
12
J3
Q19
B
B
B
B
D3
C37
R92
VAG
R82
E
CQ11
E
CQ10
E
CQ12
SENB
SENA
MISC6
R32
R23
C52
C49
R53
MB MB +
R41
MA +
MA -
C30 +
1
2
3
4
5
1
2
3
4
5
R46
U11
VCC
IN4
IN3
IN1
IN2
U9
VCC
IN4
IN3
IN1
IN2
VPI
S1
OUT4
OUT3
OUT1
OUT2
GND
OUT4
OUT3
OUT1
OUT2
GND
10
9
8
7
6
10
9
8
7
6
R89
R57
(B -)
(B + )
R54
(A + )
(A -)
+5VD
R78
C82
R59
R55
R58
R62
SCANSW
(BUTTON)
J2
PA +
1
PB 2
PB +
3
PA 4
APPENDIX
(3/3)
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
A-9
APPENDIX
VI. USB CONNECTOR PCB CIRCUIT DIAGRAM (CanoScan N1220U)
J2
8
7
6
5
4
3
2
1
C1
D1
F.G.
C3
D2
J1
R1
1
2
3
4
4
1
2
3
R2
D4
VBUS
DD+
GND
D3
C2
C4
L1
A - 10
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
REVISION 0 (JUNE 2000)
Prepared by
NEW BUSINESS TECHNICAL SUPPORT DEPT.
NEW BUSINESS QUALITY ASSURANCE DIV.
QUALITY ENGINEERING CENTER
CANON INC.
30-2, Shimomaruko 3-Chome, Ohta-ku, Tokyo 146-8501, Japan
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
COPYRIGHT  2000 CANON INC.
CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
PRINTED IN JAPAN (IMPRIME AU JAPON)
0600MI0.04-1
CANON INC.