Canon D660U Service Manual

SERVICE MANUAL

REVISION 0

JULY 2000

JY8-1318-00Z

Printed in Japan

Imprimè au Japon

Use of this manual should be strictly supervised to avoid disclosure of confidential information.

LIST OF SERIAL NUMBER

Order No. Destination Serial No.

F91-4811-100 JPN AZM000001F91-4821-100 MLC MZM000001F91-4831-100 CCSI CZM000001F91-4841-100 EUR DZM000001F91-4851-100 UK EZM000001F91-4861-100 CA FZM000001F91-4871-100 CAN/CLA LZM000001F91-4881-100 SPL/CLA JZM000001F91-4889-100 ARGENTINA RZM000001F91-4891-100 HK/KOR KZM000001-

PREFACE

This service manual contains the basic information necessary for servicing CanoScan D660U image scanner.

The service manual consists of the following chapters.

CHAPTER 1 : GENERAL DESCRIPTIONS

Features, Specifications, Exterior Features, Installation, Customer’s Daily Maintenance

CHAPTER 2 : GENERAL OPERATIONS

Basic Operation, Optical System, Image Processing System, Control System, Power Supply

CHAPTER 3 : MECHANICAL SYSTEM

Externals, Drive System, Optical System, PCB, FAU

CHAPTER 4 : MAINTENANCE AND SERVICING

Periodical Replacement Parts, Consumable Parts Durability, Periodical Servicing, Special Tools, Solvents and Lubricants

CHAPTER 5 : TROUBLESHOOTING

Initial Check, Troubleshooting, Location of Electrical Parts, Canon Scanner Test

CHAPTER 6 : PARTS CATALOG

Accessory, Main Body

APPENDIX : GENERAL CIRCUIT DIAGRAM, MAIN PCB CIRCUIT DIAGRAM, CCD DRIVE

PCB CIRCUIT DIAGRAM, BUTTON PCB CIRCUIT DIAGRAM, FAU BUTTON 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 CanoScan D660U, 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.

CHAPTER 1

GENERAL DESCRIPTIONS

I. FEATURES ..................................... 1-1

II. SPECIFICATIONS ........................... 1-2

III. EXTERIOR FEATURES .................. 1-3

A. Front View ............................... 1-3

B. Rear View................................. 1-3

IV. INSTALLATION .............................. 1-4

A. Installation Conditions ........... 1-4

B. Unlocking the Scanning

Unit .......................................... 1-5

C. Connecting to the Host

Computer ................................ 1-6

D. Connecting to FAU ................... 1-7

E. Connecting to Power

Source .....................................1-7

F. Scanning a Document ............. 1-8

V. CUSTOMER’S DAILY

MAINTENANCE .............................. 1-9

CHAPTER 1

I. FEATURES

CanoScan D660U is a flatbed image scanner with 600 x 1200 dpi resolution incorporating the following features.

1. Film Adapter Unit (FAU) is bult in the scanner for scanning negative and positive films.

2. Canon's proprietary VAROS (Variable Refraction Optical System) technology allows 1200 dpi resolution in the horizontal scanning direction when using FAU to scan films.

3. High-performance CCD and cold cathode fluorescent lamp used as light source achieve high speed and high signal-to-noise ratio image quality. The lamp has high reliability.

4. The one-touch start button starts the accompanying software, and the FAU button allows easy film scan.

5. Color gradation is naturally expressed by reading at 14 bits per RGB channel and outputting at 8 bits.

6. The scanner is easily connected to the host computer through a USB interface.

1 - 1

CHAPTER 1

II. SPECIFICATIONS

Main Unit

Type : Flatbed image scanner

Reading Unit

Light source : Cold cathode fluorescent lamp Max. scan area : 216 x 297 mm (Reflective document)

24 x 36 mm (Film) Image output : RGB 8 bits per channel (Input 14 bits) Resolution : 600 x 1200 dpi

(When scanning films) :1200 x 1200 dpi

Scan time : 120 sec. (Color document/A4/600 dpi)

80 sec. (Grayscale document/A4/600 dpi)

120 sec. (Negative film/35mm/1200 dpi)

60 sec. (Positive film/35mm/1200 dpi) Resolution conversion : 1200/600/300/150/75 dpi (Horizontal)

1200/600/300/150 dpi (Vertical)

Interface

Interface : USB

Others

Operating environment : Temperature : 10 to 35 degrees

Relative humidity : 10 to 90%RH

Air pressure : 645 to 1013 hPa Power consumption : 15 W (During operation)

5 W (During standby)

1.5 W (During suspend) Dimensions : 260 (Width) x 440 (Depth) x 98 (Height) mm Weight : 2.6 kg

Specifications are subject to change without prior notice.

1 - 2

III. EXTERIOR FEATURES

A. Front View

4

q Document Cover w Alignment Mark e Document Glass r Start Button

CHAPTER 1

1

3

2

B. Rear View

q Power Connector w FAU Port e USB Port r FAU Button

4

Figure 1-1

Figure 1-2

1

3

2

1 - 3

CHAPTER 1

IV. INSTALLATION

A. Installation Conditions

The following installation conditions are required.

1. Ambient temperature should be between 10 and 35 degrees, and relative humidity between 10% and 90%RH. Avoid location near water faucets, boilers, humidifiers, or refrigerators.

2. Avoid location 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 may 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.

1 - 4

CHAPTER 1

B. Unlocking the Scanning Unit

The scanner is shipped with the scanning unit locked by the carriage lock to prevent a damage during transport. Unlock the scanning unit before using the scanner.

1) Turn the scanner over.

Figure 1-3

2) Push the carriage lock to the "Unlock" position.

Figure 1-4

3) Return the scanner to its standard position.

Note: Ensure to lock the scanning unit during transport.

1 - 5

CHAPTER 1

C. Connecting to the Host Computer

CanoScan D660U is connected to the USB port on the host computer using a USB cable supplied with the scanner. Refer to the "Getting Started" for details. For connecting the host computer's cables, refer to the manuals for the host computer.

1) Connect the square end of the USB cable to the USB port on the scanner.

2) Connect the rectangular end of the USB cable to the USB port on the host computer.

2

q USB Port w USB Cable

1

Figure 1-5

1 - 6

CHAPTER 1

D. Connecting to FAU

Connect the FAU cable (attached to the document cover) to the FAU port on the scanner.

2

1

q FAU Port w FAU Cable

Figure 1-6

E. Connecting to Power Source

1) Connect the supplied AC adapter to the power connector on the scanner.

2) Plug the AC adapter into a power outlet.

1

2

q Power Connector w AC Adapter

Figure 1-7

1 - 7

CHAPTER 1

F. Scanning a Document

1) Open the document cover.

2) Place a document on the document glass, facing the image side down and aligning the upper corner with the alignment mark.

1

q Alignment Mark

Figure 1-8

3) Close the document cover, caring not to dislodge the document.

4) Send "SCAN" command from the host computer to scan.

1 - 8

CHAPTER 1

V. CUSTOMER'S DAILY MAINTENANCE

Dirt on the document glass or document cover may cause an unclear image or lines on the scanned image. Clean the document glass or document cover following the steps below.

1) Disconnect all cables from the scanner.

2) Wipe a dirt off with a soft clean cloth dampened with water and well wrung.

3) Thoroughly wipe water off with a dry cloth.

1 - 9

CHAPTER 2

GENERAL OPERATIONS

I. BASIC OPERATION ........................ 2-1

A. Functions ................................ 2-1

B. Outline of Electrical System... 2-2

C. Main PCB Input and Output ... 2-3

D. Basic Sequences .................... 2-4

II. OPTICAL SYSTEM .......................2-10

A. Outline .................................. 2-10

B. VAROS ...................................2-11

C. Scanning Lamp/FAU Lamp

Lighting Circuit ..................... 2-14

D. Drive Motor Control

Circuit ................................... 2-15

III. IMAGE PROCESSING SYSTEM ... 2-16

A. Outline .................................. 2-16

B. Image Processing

Functions .............................. 2-16

IV. CONTROL SYSTEM ..................... 2-19

A. Outline .................................. 2-19

B. USB Interface ........................ 2-19

V. POWER SUPPLY ..........................2-21

CHAPTER 2

I. BASIC OPERATION

A. Functions

The scanner functions are divided into the following three main systems.

1. Optical system

The optical system exposes a document by the scanning lamp and focuses the reflected light from the document on the CCD by mirrors, a lens and a VAROS unit. When scanning a film using FAU, turns OFF the scanning lamp to turn ON the FAU lamp, and exposes the film by the FAU lamp and focuses the transparent light from the film on the CCD by mirrors, a lens and a VAROS unit.

2. Image processing system

The image processing system converts the analog image signal focused on the CCD into digital data and performs image processing.

3. Control system

The control system controls the interface with the host computer and the whole operation of the scanner.

FAU

Optical system

Host

computer

FAU inverter PCB

Drive motor

Scanning

lamp

B G R

CCD

FAU lamp

BGR

VAROS

unit

Scanning

unit

Lens

Control system

Image processing system

Figure 2-1

2 - 1

CHAPTER 2

B. Outline of Electrical System

CanoScan D660U is not equipped with CPU. The device driver installed in the host computer includes a control program, which functions as CPU. Analog Image signal read by the CCD are converted into digital data by ASIC. The converted digital data are image-processed by the ASIC, and the ASIC temporarily stores the data in the buffer RAM, and outputs to the host computer via USB port.

FAU lamp

CCD drive PCB

Home

position

sensor

Inverter PCB

Drive motor

M1

Buffer

RAM

FAU inverter PCB

Main PCB

ASIC

FAU button

USB

port

Host computer

Control

program

Button PCB

Start button

Scanning lamp

2 - 2

AC adapter

Figure 2-2

C. Main PCB Input and Output

Drive

motor

M1

J4

CCD drive PCB

12345

A-A+B-

B+

6

+12VM

CCD

1

J2

VCC

Solenoid

2

VAROS_ON

CHAPTER 2

123

CN1

PCB

Inverter

Scanning lamp

1

2

J1

GND

+12VI

Home position

sensor

123456789

J2 J3

MB-

MA-

MB+

MA+

Main PCB

J1

+12VM

D-D+GND

123

101112131415161718192021222324252627282930

TR

RS

CLP

PH1

SENA

GND

SENB

4

GND

PH2

VOR

+12V

VAROS

DGND

J3

+12VI

GND

1

234

AGND

FAU Dect

VOG

FAU Button

DGND

5

AGND

VOB

USB

AGND

VCC

HMSEN

GND

+12VI

J1

4321

Button PCB

123

DGND

Flat Button

4

DGND

J5

+12V

GND

J4

1

2

1

2

3

CN1

CN2

1

2

J1

AC adapter

FAU lamp

FAU button PCB

1234

FAU inverter PCB

Figure 2-3

2 - 3

CHAPTER 2

D. Basic Sequences

The basic sequences of the scanner is divided into the power ON sequence, calibration sequence, and document scanning sequence.

1. Power ON sequence

Pow er ON

USB cable is connected

properly?

YES

2

YES

Scanner was initialized?

NO

Register test passed?

YES

Buffer RAM test passed?

YES

NO

Returns FALSE

Scanning unit is

in home position?

Returns FALSE

<Light intensity test error> Initializes the scanner again up to 30 sec.

2 - 4

NO

Light intensity test passed?

1

YES

NO

YES

Figure 2-4-1

Returns scanning

unit to the home

position

Home position sensor

works normally?

NO

Returns FALSE

CHAPTER 2

1

Home position sensor

works normally?

YES

Scan star t position

was detected?

YES

Writes in register that

"scanner was initialized"

Returns TRUE

Standby

NO

Returns FALSE

2

Figure 2-4-2

2 - 5

CHAPTER 2

2. Calibration sequence

Standby

White shading

data is required?

YES

Initializes buffer RAM control

Obtains 1 line of data

to buffer RAM

9 lines of data

was obtained?

YES

Returns scanning unit

to the home position

NO

Moves scanning unit

forward 9 lines

NO

2 - 6

White shading data

is transmitted to host

computer?

YES

Standby

NO

Figure 2-5

CHAPTER 2

1) Home position test

Checks if the scanning unit operates normally. When the scanner is powered ON, the scanning unit automatically moves to the home position. This is also a scan start position.

1 2

q Home Position w White Calibration Plate

Figure 2-6

2) Light intensity test

Checks if the light intensity of the scanning lamp reaches the standard value. When the scanning lamp lights, the control program reads the light reflected from the white calibration plate with the CCD, and checks if the light intensity into each CCD of red, green, and blue reaches the standard value. If the light intensity is below the standard value, the control program continues the test for up to 30 seconds. If it still does not reach the standard value, the control program returns "FALSE".

2 - 7

CHAPTER 2

3. Document scanning sequence

Standby

Document scan

is required?

YES

Calculates the amount of

horizontal scan data and

the number of vertical scan

motor pulse

Sets scan parameter to ASIC,

and initializes buffer RAM

Moves scanning unit to scan start position

Scanning unit moved?

NO

2 - 8

YES

Starts document scan

3

Figure 2-7-1

CHAPTER 2

3

NO

Scan cancellation

is required?

NO

Document was scanned?

YES

Returns scanning unit

Scanning unit returned

to the home position?

YES

NO

Stops drive motor

Image data was

transmitted?

YES

Standby

NO

Figure 2-7-2

2 - 9

Canon D660U Service Manual

CONTENTS

CHAPTER 1

I. FEATURES

II. SPECIFICATIONS

III. EXTERIOR FEATURES

IV. INSTALLATION

V. CUSTOMER'S DAILY MAINTENANCE

CHAPTER 2

I. BASIC OPERATION