BenQ 2720S User manual

BENQ PROFESSIONAL FILM SCANNER
SCANWIT 2740S
SERVICE GUIDE

Table of Contents
Table of Contents .............................................................. i
Chapter 1 System Overview............................................ 1-1
1.1 Features ............................................................................. 1-1
Chapter 2 Specifications and Section Namess .................... 2-1
2.1 Specifications ...................................................................... 2-1
2.2 Sectional Diagram................................................................ 2-2
Chapter 3 Theory of Operation ........................................ 3-1
3.1 Fundamental of Optic Process ................................................ 3-1
3.2 Scan Process ....................................................................... 3-2
Chapter 4 Mechanism .................................................... 4-5
4.1 Optics Module...................................................................... 4-5
4.2 Transmission Module ............................................................ 4-8
Chapter 5 Electrical Systems........................................... 5-1
5.1 Overview ............................................................................ 5-1
5.2 SCSI Interface..................................................................... 5-5
5.3 Scanner Controller (ASIC & µP) ............................................. 5-7
5.4 Analog Circuits .................................................................... 5-8
5.5 CCD Head/Elements ............................................................. 5-9
5.6 Main Flow Chart of Film Scanner .......................................... 5-10
5.7 Connectors of Scanner 2740S .............................................. 5-11
Table of Contents API Confidential i
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Chapter 6 Trouble-shooting............................................. 6-1
6.1 Error Code Identification from “Status” LED ............................. 6-1
6.2 No Function after Power On:.................................................. 6-1
6.3 Cannot Link with Host Computer:........................................... 6-1
6.4 Flash "1" time: .................................................................... 6-2
6.5 Flash "2" times:................................................................... 6-2
6.6 Flash "4" times:................................................................... 6-2
6.7 Flash "5" times:................................................................... 6-2
6.8 Flash "6" times:................................................................... 6-2
6.9 Flash "7" and "8" times:........................................................ 6-2
6.10 Scan Quality not Good: ....................................................... 6-3
6.11 Power Supply..................................................................... 6-3
6.12 CCD Head ......................................................................... 6-3
Chapter 7 Maintenance .................................................. 7-1
7.1 Precaution .......................................................................... 7-1
7.2 Housing Section................................................................... 7-1
7.3 Transmission Section ............................................................ 7-3
7.4 PCB-frame Section ............................................................... 7-5
7.5 Panel Board Section ............................................................. 7-6
7.6 About Resolution.................................................................. 7-7
Appendix A Frequently Asked Questions ........................... A-1
A.1 General Questions................................................................ A-1
A.2 MiraPhoto ........................................................................... A-2
A.3 Hardware (Scanner) ............................................................. A-6
A.4 Others................................................................................ A-9
ii API Confidential Table of Contents
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Appendix B Spare Parts Ordering Information.................... B-1
B.1 Ordering Information............................................................ B-1
B.2 Spare Parts List ................................................................... B-1
Appendix C Explosive Diagram ........................................ B-1
C.1 Ordering Information............................................................ B-1
C.2 Spare Parts List ................................................................... B-1
Table of Contents API Confidential iii
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Chapter 1 System Overview
This chapter includes an overview of the professional film scanner
features.
1.1 Features
 2700 ×2700 dpi optical resolution
 36-bits, over 68.7 million colors for true-to-life accuracy
 Fast scan speed: complete a 2700 dpi scan within 40 sec.
 Auto Positioning and Focusing Technology to secure a sharper image
 Advanced zero-reflection optical design for a undistorted scan image
 Auto-loading mechanism can preview/scan up to six frames at one
time
 3.2D high dynamic range for greater color fertility
 3-channel ASIC and A/D converter design for accurate color
registration
 All software with this scanner is Year 2000 compliant
 Implement DICE technology (Digital defect correction technology).
 Automatic object handling mechanism can preview / scan six frames
of image in one click.
 The first film scanner in the world offers the utmost user friendly 'push
mode' function.
 Fast preview and scan speed
 3 channels A/D converter.
System Overview API Confidential 1-1
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Chapter 2 Specifications and Section Names
This chapter lists the specifications and section names of the film scanner.
2.1 Specifications
Machine Type Professional film scanner
Scan Method 3 pass , color CCD
Scan Mode grayscale 12 bits/pixel (4096 levels of gray)
color 48 bits/pixel (over 68.7 billion colors)
Optical Resolution 2700 ×2700 dpi
Scanning Area
Slide: 35mm mounted size (Max. batch scan 4 units)
Filmstrip 35mm size (Max. batch scan 6 units)
Interface SCSI II
Scan Velocity Calibration Color: 5 sec
Scan Speed Color: less then 10ms/line,
less than 38s/35mm film, 2700dpi
Preview Speed Color: 5sec for 35mm film
Transmission 2 Megabyte/sec
Scan Mode & ICE Mode High Speed Mode
High Quality mode – 24 bits/pixel
High Quality mode – 36 bits/pixel
Demission 162mm ×151mm ×347mm (W×H×L)
Net Weight 2.6 kgs
System Requirement
For IBM PC & Compatible
Pentium CPU with 32MB RAM
CD-ROM drive
Windows NT 4.0/95/98/2000
Specifications and Section Names API Confidential 2-1
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For Macintosh
Power PC with 32MB RAM
CD-ROM drive
Mac OS 8.6-9.1
Power Consumption 25 Watt maximum
Power Requirement Voltage 100, 110, 220, or 240V (AC)
Frequency 50/60Hz
Environment Requirement Operational Temperature 10℃to 40℃
Relative Humidity 10% to 90%
2.2 Sectional Diagram
The main parts of the scanner are shown in the Figure 2-1, Figure 2-2,
and Figure 2-3, and Figure 2-34, and the names of the parts are listed in
Table 2-1, Table 2-2, Table 2-3 and Table 2-34.
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