Canon CanoScan N656U driver and firmware
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Service Manual - Page 4
...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...
Service Manual - Page 5
...IV. CONTROL SYSTEM 2-20 A. Outline 2-20 B. Outline of USB 2-21
V. POWER SUPPLY 2-23
CHAPTER 3 : MECHANICAL SYSTEM
I. EXTERNALS 3-1 A. Covers 3-1
II. DRIVE SYSTEM 3-5 A. Drive Unit 3-5 B. Drive Wire 3-8
III. OPTICAL SYSTEM 3-9 A. Contact Image Sensor ......... 3-9
IV. ELECTRICAL SYSTEM 3-11 A. USB Connector PCB 3-11 B. Flat Cable 3-13
COPYRIGHT © 2000 CANON INC. CANOSCAN N650U...
Service Manual - Page 7
...
I. FEATURES 1-1 II. SPECIFICATIONS 1-2 III. EXTERIOR FEATURES 1-4
A. Front View 1-4 B. Rear View 1-4 IV. INSTALLATION 1-5
A. Preface 1-5 B. Installation 1-6 C. Connecting to the Host Computer
1-7 D. Scanning a Document .......... 1-8 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)
Service Manual - Page 12
... 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...
Service Manual - Page 13
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)... position.
Note: Always lock the scanning unit during transport.
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COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Service Manual - Page 19
... 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.
Drive motor
Contact image...
Service Manual - Page 33
... 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
Gate array
MA+ MBMB+ MA-
Motor driver
PA+ J2-1 PB- -2 PB+ -3 PA- -4
Drive motor M1
Figure 2-14
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COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U...
Service Manual - Page 37
... 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.
Host computer Control...
Service Manual - Page 52
.... 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
COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON...
Service Manual - Page 55
.... 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
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COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN...
Service Manual - Page 60
...SPECIFICATIONS) 3. The scanner is not installed near a water faucet, boiler, humidifier, open...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.
COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U...
Service Manual - Page 62
... 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...
Service Manual - Page 64
... (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...
Service Manual - Page 65
... 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.
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COPYRIGHT © 2000 CANON INC. CANOSCAN...
Service Manual - Page 66
..." menu to display as shown in Figure 5-2.
· Vendor Description · Device Description · Port Name · Local Name
Figure 5-2
: 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.
COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV...
Service Manual - Page 67
..." 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
: Manufacturer name (Canon) of the scanner connected. : Product name of the scanner connected. : Scanner controller version.
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COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN...
Service Manual - Page 68
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
Service Manual - Page 69
CHAPTER 5
Click "OK" to perform Scanner Self Test. When it has completed normally, a dialog as shown in Figure 5-7 (Window) or Figure 5-8 (Macintosh) is displayed.
Figure 5-7
Figure 5-8
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COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Service Manual - Page 70
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)
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Service Manual - Page 74
...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...