Epson GT-5500 Scanning

Scanning

Scanner type: Flatbed, color

Photoelectric device: Color CCD line sensor

Effective pixels: 3400 × 4680 pixels at 400 dpi, 100%

Document size: 216 mm × 297 mm (8.5 inches × 11.7 inches)

A4 or US letter size

(The reading area can be specified from

your software.)

Scanning resolution: 400 dpi (main, sub)

Output resolution: 50 dpi to 1600 dpi in 1 dpi steps

Color separation: RGB color filters on CCD

Reading sequence:

Monochrome One-pass scanning

Color page sequence Three-pass scanning (R, G, B)

Color byte sequence One-pass scanning (R, G, B)

Color line sequence One-pass scanning (R, G, B)

Zoom: 50% to 200% in 1% increments

Image data: 10 bits per pixel per color saved as 8 bits per

pixel per color maximum

Brightness: 7 levels

Line Art settings: Fixed threshold

Text Enhancement Technology

(enable/disable selectable)

Halftoning process: AAS (Auto Area Segmentation)

Enable/disable selectable

3 halftoning modes (A, B, and C) and

4 dither patterns (A, B, C, and D) for

bi-level and quad-level data

(2 downloadab le dither patt erns)

Gamma correction: 2 types for CRT display

3 types for printer

1 type for user-defined

LGT-5500 Rev.C

A5 size Appendix A

July-18-97 Pass 0, DR

A-2 Technical Specifications

Contents

Main Scanner Parts Proof Sign-off: E. Ohtera _______ D. Grady _______ July-18-97 Cover pass 0 Color Image Scanner Users Guide A5 size Frontmatter July-18-97 Pass 0, DR Declaration of Conformity ii Contents GT-5500 Rev.C iv Page Page Introduction Features Options Warnings, Cautions, and Notes w c 2 Important Safety Instructions Page For United Kingdom Use rs w 4 Safety information Chapter 1 Setting Up the Scanner Choosing a Place for th e Scanner 1-2 Removing the Transportation Screw Plugging In the Scanner 1-4 Initialization Connecting the Scanner to Your Computer Understanding SCSI connections 1-6 Setting the SCSI ID number * * Setting the terminator switch 1-8 Note: Do not use an external terminator. ON SW Setting Up the Scanner 1-9 R A5 size Chapter 1 July-18-97 Pass 0, DR Connecting the scanner 1-10 Power-on sequence Power-off sequence 1-12 Chapter 2 Using Your Scanner Lights and Buttons 2-2 Lights Buttons Placing a Document on the Scanner 2-4 Page Removing the Cover for Thick or Large Documents 2-6 Sizing Up Your System RAM and hard disk size Accelerator boards Video cards 2-8 Monitors File compression software Maintenance and Troubleshooting Maintenance Cleaning the scanner 3-2 Replacing the fluorescent lamps Transporting the Scanner Problems and Solutions Error indicators 3-4 Operating problems 3-6 Quality problems 3-8 Page 3-10 Appendix A A Technical Specifications Scanning A-2 Electrical Technical Specifications A-3 Environmental Safety Approvals A-4 SCSI Interface Technical Specifications A-5 Initialization Methods A-6 Appendix B B Contacting Customer Support For United Kingdom and the Republic of Ireland Users Enquiry Desk B-2 Customer Support Contacting Customer Support B-3 Faxon Epson EPtec - Bulletin Board Service For Australian Users B-4 EPSON FAXBACK EPSON Bulletin Board System Internet URL http://www.epson.com.au For Singapore Users Contacting Customer Support B-5 For Hong Kong Users Internet home page For Philippines Users Glossary GT-5500 Rev.C Glossary 1 2 Glossary 3 4 Index A B C D I L IN-2 M O S T V