Avision AV25 User Manual

AVISION

AV25

Image Scanner

User's Manual

Version 1.0

(Doc. No. 250-0053-0)

 Avision Inc. 1996

Trademarks

Microsoft is a U.S. registered trademark of Microsoft Corporation.
Windows and MS-DOS are trademarks of Microsoft Corporation.
IBM, PC, AT, XT are registered trademarks of International

Business Machines Corp.
Other brands and product names herein are trademarks or

registered trademarks of their respective holders.

Copyright

All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system,
or translated into any language or computer language, in any
form or by any means, electronic, mechanical, magnetic, optical,
chemical, manual, or otherwise, without the prior written
permission of Avision Inc.

Material scanned by this product may be protected by
governmental laws and other regulations, such as copyright laws,
the customer is solely responsible for complying with all such
laws and regulations.

ii

Warranty

The information contained in this document is subject to change
without notice.

Avision makes no warranty of any kind with regard to this
material, including, but not limited to, the implied warranties of
fitness for a particular purpose.

Avision shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the
furnishing, performance, or use of this material.

iii

FCC Radio Frequency Interference Statement

This equipment has been tested and found to comply with the
limits for a class B digital device, pursuant to Part 15 of the
FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful
interference to radio communication. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following
measures:

* Reorient or relocate the receiving antenna.
* Increase the separation between the equipment and receiver.
* Connect the equipment into an outlet on a circuit different from

that to which the receiver is connected.
* Consult the dealer or an experienced radio/TV technician for
help.

CAUTION: Any changes or modifications not expressly

approved by the manufacture of this device could void the user's
authority to operate the equipment.

iv

Table of Contents

CHAPTER 1 INTRODUCTION...........................................................1-1

CHAPTER 2 SCANNER INSTALLATION.........................................2-1

2.1 INSTALLATION OF THE SCANNER......................................................2-1

2-2 CONNECTING THE CABLE................................................................ 2-2

CHAPTER 3 SCANNER DRIVER INSTALLATION......................... 3-1

3-1 AUTO-INSTALLATION PROGRAM...................................................... 3-1

3-2 UNINSTALL THE SCANNER...............................................................3-3

CHAPTER 4 SCANNER OPERATION...................................................... 4-1

4-1 IMAGE TYPE ................................................................................... 4-3

4-2 SCANNING PARAMETERS & IMAGE CONTROL................................... 4-4

4-3 SCANNING...................................................................................... 4-7

CHAPTER 5 TROUBLESHOOTING .................................................. 5-1

5-1 QUESTIONS AND ANSWERS.............................................................. 5-2

5-2 TECHNICAL SERVICE.......................................................................5-5

CHAPTER 6 SPECIFICATIONS.........................................................6-1

6-1 MODEL: AV25............................................................................... 6-2

v

Chapter 1 Introduction

Congratulations on your purchase of Avision AV25 image
scanner. Avision Inc. is one of the leading companies in the
world to develop high performance sheet-fed scanners.

Before you install and operate the new scanner, please take a few
minutes to read through this manual. It provides you with the
proper instructions on how to unpack, install, operate and
maintain the scanner.

Figure 1-1 shows how the scanner is packed. Please check all
the items against your checklist. If you did not receive all the
items, please contact your authorized local dealer immediately.

1-1

Figure 1-1 Scanner packing

1-2

Chapter 2 Scanner Installation

Precautions

* Keep the scanner out of direct sunlight. Direct exposure to the

sun or excessive heat may cause damage to the unit.
* Do not install the scanner in a humid or dusty place.
* Be sure to use the proper AC power source.
* Place the scanner securely on a level surface. Tilted or uneven

surfaces may cause mechanical or paper-feeding problems.
*Retain the scanner box and packing materials for shipping

purposes.

2.1 Installation of the Scanner

Please unpack the packing carefully, and check the contents
against the checklist. If any items are missing or damaged,
please contact your dealer immediately.

2-1

2-2 Connecting the Cable

Be sure the scanner is power off.

Connect the power cable and signal cable as shown below.

Figure 2-1 AV25 scanner cable connection

2-2

Document loading

Load the documents one page at a time. And put the document to
be scanned face down in the scanner.

Figure 2-2 Put document in the scanner.

2-3

Chapter 3 Scanner Driver Installation

Minimum Requirements:

* IBM compatible PC 386/486 or Pentium;
* Microsoft Windows 3.1 or Windows 95;
* DOS 5.0 or higher;
* One printer port available (enhanced parallel port

recommended);
* 2 megabytes of available hard disk space for installation;
* 4 megabytes of RAM (8 megabytes or higher recommended);
* A video graphics array (VGA) monitor;
* A Microsoft Windows-compatible pointing device, e.g., the

mouse;
* A CD ROM drive.

3-1 Auto-Installation Program

Installation procedure of the scanner driver with Avision Auto­Installation Program is as follows:

1. Start Windows 3.1 or Windows 95.

2. Insert AV25 CD kit into your CD ROM drive.
For Windows 3.1 or Windows 3.11 (See Figure 3-1,3-2)

3. From the File Menu, choose RUN, type
d:\driver\av25\setup.exe, and then click O.K.

3-1

For Windows 95

3. Press the Start button, choose RUN, type
d:\driver\av25\setup.exe, and then click O.K.

4. Follow the instructions on the screen to complete the
installation (usually just clicking O.K. will complete the
installation).

Fig. 3.1

Fig. 3.2

3-2

3-2 Uninstall the Scanner

You can uninstall the scanner by double-clicking on the Uninstall
icon stored in the AV25 Driver group.

...

3-3

Chapter 4 Scanner Operation

There are two types of application software interface to use with
the AV25 scanner. They are TWAIN and ISIS. TWAIN is the
most popular interface among image-editing application
software, while ISIS is most popular among archiving application
software (OCR).

Scanning Images from within an Application (TWAIN)

1. Open your application and choose Select Source from the

File menu. If the Select Source menu options are not
available from the File menu, see the user guide of your
application to learn how the TWAIN link is used.

2. A dialog box appears containing the different TWAIN

sources you can choose for bringing an image into your
application.

3. Select AV25/16 V3.2 as the source.

4. You need to select AV25 for just once except when you

have used the dialog box to select a different source. In
that case, you will need to select AV25 as the source again
before you can reuse the scanner.

5. Do calibration: Place a sheet of A4-size white paper in the

scanner and press the Calibration button to calibrate
“whiteness” for the scanner.

4-1

6. Place the image to be scanned face down on the scanner.

7. From the File menu, select Acquire.

8. Avision TWAIN user interface will pop up on the

screen. Click on the Prescan or Scan button to get the
image.

Avision TWAIN user interface:

4-2

4-1 Image Type

As shown below, you can select the mode you want to use with
your document or image. Just click on the corresponding button.

Line art

Error Diffusion

Line art

Line art includes only black and white areas.
There are no intermediate shades of gray in
between.

Error Diffusion

While taking up but a minimum storage space,
error diffusion gives good image texture and
excellent image details.

Halftone

Halftone simulates different shades of gray by
varying the threshold value of a matrix.

Halftone

Gray Scale

Gray (256 levels gray scale)

Scanner recognizes each point in the image as a
shade of gray (continuous tone). 8-bit gray gives
more detailed information about the image.

4-3

4-2 Scanning Parameters & Image Control

Brightness

Resolution

Contrast

Control

Adjustment

Adjustment

Resolution: The number of dpi (dots per inch) that AV25 uses

for a scan.

Brightness: Adjusts the lightness or darkness of an image.

The higher the value, the brighter the image.

Contrast: Adjusts the range between the darkest and the

lightest shades in the image. The higher the
contrast, the bigger the different gray scales.

4-4

Auto Level

Auto Area

Descreen

Reset

Invert
Calibration

Quality Mode
Speed Mode

Pixel/Inch/Cm
Set Gamma

Image Information

Auto Level: Optimizes the scanned image.

Auto Area: Automatically sets the whole document as the

scan area, no matter what its size.

Descreen: Eliminates the Moire patterns commonly found in

printed matter.

Before descreen After descreen

4-5

Reset: Resets the scanning parameters you set.

Invert: The invert command reverses the brightness and

the color in the image.

Calibration: Defines “whiteness” for the scanner. Users are

recommended to calibrate the light source if the
scanned image looks undesirable or comes out to
be too dark.

Quality/Speed Mode:

Users can select either mode to perform scanning
according to their own need. Select quality mode
scanning if your emphasis is on the quality of the
scanned image. Else, select speed mode scanning
if you want to speed up the scanning process.

Pixel/Inch/Cm:

Represents the different measure systems to be
used in each scan.

Set Gamma: Adjusts the midtone of the image without losing

details of the lightest and the darkest areas.

Image Information:

Gives related information of the scanned image.

4-6

4-3 Scanning

Cursor

Preview: Previews your image roughly and allocates the area to

be scanned.

Scan: Scans the area with the parameters you set.
Exit: Cancels the current job.
Document Size: To designate the size of your document, just click

on its icon on the margin of the preview window

As shown in the figure below, in the Preview window, you can
define the area to be scanned by dragging the four cursor auxiliary
lines.

Document size

Auxiliary
lines

The Preview
Window

4-7

Chapter 5 Troubleshooting

The scanner will automatically perform a simple self test
each time it is powered on. This will help spot major
system errors in the scanner itself.

If you have any problem with the operation of the scanner,
please check the following troubleshooting hints.

5-1

5-1 Questions and Answers

Question: Paper becomes jammed during scanning.
Answer: Press the paper release button right-hand side of

the scanner front panel. Pull out the jammed
paper carefully.

Question: More than one sheet of paper are fed into the

scanner.

Answer: Remember to load your documents one page at

a time.

Question: Paper becomes skewed in the scanner.
Answer: When loading, remember to align your document

with the slide guide to keep the paper path
straight.

Question: Why is it the scanned image always comes out to

be too dark?

Answer: 1) Modify the Gamma setting to 1.8 for your

monitor and, when printing, set Gamma to

2.2 for your printer.

2) Use the Brightness setting of the TWAIN
user interface to get a brighter image.

Question: Why does my scanner scan at a very low speed?
Answer: If you have installed “Works for Windows,” it

will install Window Printing System (WPS) in
your WIN.INI file. This will share the printer

5-2

port time remarkably. You can remove the WPS
from your WIN.INI file, as follows:

From:
[MS Text Converters]

MSWorksWin=Works for Windows 2.0,C:\WINDOWS\MSAPPS\TEXTCONV\worksdos.cnv,wps
Works for Dos 2.0=Works for DOS 2.0 MSAPPS\TEXTCONV\workswin.con,wps

To:
[MS Text Converters]

MSWorksWin=Works for Windows 2.0,C:\WINDOWS\MSAPPS\TEXTCONV\worksdos.cnv
Works for DOS 2.0=Works for DOS 2.0, C:\WINDOWS\MSAPPS\TEXTCONV\workswin.con

Question: The scanning speed of my scanner is much

slower than that of those installed on other
computers. Can I speed it up?

Answer: In such case, please

a) Set you PC printer port to the EPP mode

from BIOS setting, or,

b) Add Avision scanner interface card IF05 to

scan at a higher speed.

Question: Does it take long for the scanner to initialize?
Answer: If your printer port supports SPP mode only, it

takes about two minutes for the scanner to
initialize. If your printer port supports EPP
mode, the initialization speed is much faster,
about 20 seconds. Generally, it takes a two to
three minutes time for the AV25 scanner lamp to
warm up. It may be the scanner lamp is out of
order if it works otherwise.

5-3

Question: Sometimes it seems the scanner does not detect

paper.

Answer: The AV25 scanner’s paper sensor is located at

the center of the paper guide. Please place
whatever you want to scan somewhere
thereabout and use the slide guide to keep the
paper path straight.

Question: Why some parallel port devices and software’s

keypro do not work with the AV25 scanner?

Answer: If you would like to connect some parallel port

devices other than printer, please do not connect
them to the same parallel port that AV25
currently uses. It is advisable that you use other
parallel ports to connect these devices or
keypro. For instance, you can connect the
AV25 scanner to LPT1, and connect other
parallel port devices to LPT2. Or you can add a
data switch to avoid the problem.

5-4

5-2 Technical Service

Technical support for Avision scanner is provided at the
Avision Technical Assistance Center (ATAC). Before
contact with ATAC, please prepare the following
information:
* Scanner serial & revision number (located on the bottom

of the scanner);

* Hardware configuration (e.g., your host CPU type, RAM

size, free disk space, display card, interface card...);

* The name and version of your scanning software

application;

* The version of your scanner driver.
Please call us at:
US and Canada Area: Avision Labs., Inc.
Address: 48521 Warm Springs Blvd. #312

Fremont, CA 94539
Telephone number: 510-440-8785
Fax number: 510-440-8337
Web Site: http://users.aimnet.com/~avision
E-mail: [e-mail]

Other Area: Avision Inc.
Address: No. 20, Creation Road I, Science-

Based Industrial Park, Hsinchu,

Taiwan, R.O.C.
Telephone number: 886-3-5782388
Fax number: 886-3-5777017
BBS: 886-3-5786149
CompuServe: 101400,444
Email: [e-mail]

5-5

Note: 1. You can find the latest driver and documents

in Avision BBS. Our service is 24 hours a day.
The communication setting is: 2400-19200 BPS, 8N1S.

2. You will be asked to enter your first name, last
name and password at all times.

3. For first-time user, you will be requested of your full
name and password. The same name and same
password are required to enter BBS again next time.

5-6

Chapter 6 Specifications

All specifications are subject to change without notice.
The following can not be properly fed by ADF:

* Paper with clip or staple attached;
* Paper with ink not totally dry;
* Paper with inconsistent thickness, such as envelopes;
* Paper with wrinkles, curls, folds or tears;
* Tracing paper;
* Coated paper;
* Carbonless paper;
* Paper narrower than 3.5" or wider than 8.5";
* Items other than papers, such as cloth, metal or
OHP film;
* Notched paper;
* Paper with an odd (non-rectangular) shape;
* Very thin paper.

6-1

6-1 Model: AV25

Scanner Type: Desktop Sheet-fed
Optical Resolution: up to 200 dpi * 200 dpi (H*V)
Scanning Modes: Black & White mode

Halftone mode (64-step)
Error diffusion (2 patterns)
8-bit gray scale (256 levels)

Scanning Speed: 6 pages per minute (200 dpi, line

art, letter size)
Document Size 8.5” * 14”
Min. Document Size: 4" x 3.5" (ADF)

3.5" x 2" (manual feed)
Paper: 16 lbs. to 24 lbs.
Interface: Printer port
Power Consumption: 10 watts
Dimensions: (WxDxH) 295 mm x 51 mm x 61 mm
Weight: 0.6 kg

6-2

EC Declaration of Conformity

According to EN45014

Manufacturer's Name: AVISION INC.
Manufacturer's Address: No. 20, Creation

Road I, Science-Based
Industrial Park,
Hsinchu, Taiwan, R.O.C.

declare that the product

Model Number : AV25

conforms to the following Product Specifications:

Emission: EN 50081-1 (1992)

EN 55022 (Class B)
(Conducted Radiated) (1994)
EN 60555-2 (Harmonics) (1987)
EN 60555-3 (Flicker) (1987)

Immunity:

EN50082-1 (1992)
IEC 1000-4-2 (ESD) (1995)
IEC 1000-4-3 (RS) (1995)
IEC 1000-4-4 (EFT/Burst) (1995)
IEC 1000-4-5 (SURGE) (1995)

Date: December, 1995

6-3