Epson Gt20000 User Guide

Using the Optional Automatic Document Feeder111
GT-20000 User’s Guide
8. Click the arrow to open the Resolution list and select an appropriate resolution for your 
original(s). See “Selecting the Scan Resolution” on page 32 for instructions.
9. Click Preview to preview your image(s). The Preview window appears and displays 
your image(s). See “Previewing and Adjusting the Scan Area” on page 34 for 
instructions on settings in the Preview window.
10. Modify the image quality, if necessary. See “Adjusting...

Maintenance112
GT-20000 User’s Guide
Chapter 9 
Maintenance
Cleaning the Scanner
To keep your scanner operating at its best, clean it periodically using the following 
procedure.
c
Caution:
❏Do not press the glass surface of the document table with any force.
❏Be careful not to scratch or damage the glass surface of the document table, and do not 
use a hard or abrasive brush to clean it. A damaged glass surface can decrease the scan 
quality.
❏Never use alcohol, thinner, or corrosive solvent to clean...

Maintenance113
GT-20000 User’s Guide
Replacing the Scanner Lamp
The luminosity of the scanner lamp declines over time. If the lamp breaks or becomes too 
dim to operate normally, the scanner stops working and both the Ready and Error lights 
rapidly flash. When this happens, the lamp assembly must be replaced by a professional. 
For details, contact your dealer. See “Contacting Customer Support” on page 133.
c
Caution:
Never open the scanner case. If you think repairs or adjustments are necessary,...

Troubleshooting114
GT-20000 User’s Guide
Chapter 10 
Troubleshooting
Scanner Problems
Error Indicators
When an error occurs, the scanner stops operating and the Error and Ready lights indicate 
the error type.
Error light 
(Red)Ready light 
(Green)Meaning
On On The scanner has received incorrect commands from your 
scanning software.
When this error occurs, try to scan the document again. 
The scanner returns to normal when it receives correct 
commands. Normally you do not need to reset the 
scanner...

Troubleshooting115
GT-20000 User’s Guide
The Scanner Does Not Turn On
❏Make sure your scanner’s power cord is securely connected to the scanner and a 
working electrical outlet.
❏Make sure the electrical outlet works. If necessary, test it by plugging in another 
electrical device and turn it on.
The Scanner Does Not Turn Off
Make sure the scanning software is not running.
You Cannot Start Epson Scan
❏Make sure the scanner is turned on.
❏Turn off the scanner and computer, then check the interface cable...

Troubleshooting116
GT-20000 User’s Guide
For Windows only:
❏Make sure the scanner’s SCSI ID and terminator are set correctly. See “Setting Up the 
SCSI Interface” on page 88 for details on making these settings. If you have other 
expansion boards in your computer, make sure that their interrupt settings are not 
interfering with your SCSI board. See your computer’s documentation for details.
❏Make sure the SCSI cable meets the requirements of your SCSI board. Refer to the 
documentation that comes with...

Troubleshooting117
GT-20000 User’s Guide
4. Scroll down and double-click Universal Serial Bus controllers.
If a USB Universal Host Controller and USB Root Hub are listed, Windows supports 
USB.
5. Try scanning again. If your scanner still is not recognized, contact your dealer or a 
qualified service for assistance. See “Contacting Customer Support” on page 133.
Pressing the Start Button Does Not Start the Correct Program
❏Make sure Epson Scan is installed correctly. 
❏Windows Vista and XP: Click the...

Troubleshooting118
GT-20000 User’s Guide
Optional Automatic Document Feeder Problems
You Cannot Scan Using the ADF
❏Make sure you have selected either Office Mode or Professional Mode in Epson 
Scan. See “Changing the Scan Mode” on page 22 for instructions.
❏Make sure Auto Detect (Office Mode only), ADF - Single-sided, or ADF - 
Double-sided is selected as the Document Source setting in Epson Scan. See 
“Scanning in Office Mode Using the ADF” on page 108 or “Scanning in Professional 
Mode Using the ADF”...

Troubleshooting119
GT-20000 User’s Guide
If paper jams at the feeder position, open the left cover and carefully pull the jammed paper 
out of the feeder mechanism.
Note:
Be careful not to pull too hard; otherwise, the paper may tear, making it more difficult to remove. 

Troubleshooting120
GT-20000 User’s Guide
If paper jams at the paper eject position, open the right cover and carefully pull the jammed 
paper out of the feeder mechanism.
Note:
Be careful not to pull too hard. If the paper tears, open the middle cover and remove the paper.