Xerox Documate 4790 User Guide

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-163
Replacing the Rollers
Frequent paper jams are a symptom of a worn roller assembly. A worn roller can cause documents to feed in 
skewed at an angle, or multiple pages to feed at the same time. A worn roller should be replaced to avoid 
damage to the scanner’s internal parts. Before replacing the roller you should clean it as excessive dust on the 
roller will make it appear worn and smooth. You cannot properly diagnose a worn roller until you have cleaned it.
When replacing the rollers described in this section, you should replace all of the rollers at the same time. Do not 
replace just one roller and not the other. When you are finished replacing the roller, reset the roller count in the 
user utility as described on page 171.
Warning: keep all replaceable parts out of the reach of children. These parts are small and pose a choking 
hazard.
Turn off the scanner power then unplug the power cord from the scanner. Pull the cover release handle and open 
the scanner.
When you are done replacing the rollers, close the scanner carefully pressing down on both sides of the cover 
until it locks in place. Do not slam down the cover. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-164
Replacing the Feed Roller Module
1. Pull the locking lever on the left side of the feed roller module down from the scanner. This releases the roller 
module from the scanner.
2. Carefully remove the roller module from the scanner. Discard the roller module, it cannot be repaired or 
reused.
3. Take the new roller module out of its packaging.
4. Align the end of the plastic end on the right side of the roller module with the slot in the roller compartment. 
Make sure the flat side of the roller tip is aligned properly with the slot in the scanner. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-165 5. Insert the right side of the roller module into the scanner, then carefully angle the left of the roller module 
into the scanner. Be careful while inserting the roller module as the gears will engage as you place the 
module in the scanner.
6. Gently lift and hold the roller module in the scanner and then rotate the locking arm up and into the scanner. 
Make sure the roller module is securely in place before closing the scanner.
Replacing the Double Feed Prevention Roller
1. Pull up on the double feed prevention roller cover and remove it from the scanner. Set the cover aside and 
make sure nothing is set on the cover as it will break. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-166 2. Carefully pull and hold the black tab on the left side of the roller away from the bar.
3. Gently lift the left side of the roller bar up and then pull the roller out of the scanner toward the left, releasing 
the roller from the gears on the right side of the compartment. 
4. Discard the roller, it cannot be repaired or reused.
5. Take the roller out of its packaging.
6. Align the plastic gear end on the right side of the roller with the gears in the roller compartment. Make sure 
the flat side of the roller tip is aligned properly with the slot in the scanner.
7. Carefully insert the gear end into the scanner and angle the roller down into the left side of the 
compartment. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-167 8. Press gently on the metal bar on the left side to lock the roller in place with the black tab in the 
compartment.
9. Place the roller compartment cover in the scanner and lower it into place.
10. Press gently on the compartment cover to lock in the scanner. Make sure this cover is fully closed as it may 
break and cause damage to the scanner if it is not properly in place.
Installing an Imprinter
An imprinter unit will print text, such as a date and time stamp, on the pages as they are scanned. If you have a 
pre-imprinter unit installed, the text is printed on the face-up side of the page before the image is captured, and 
the printed text is then reflected in the scanned image. 
The imprinter unit is an optional accessory that you can purchase at www.xeroxscanners.com in the Parts and 
Accessories page for your scanner.
1. Turn off the scanner. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-168 2. Open the pre-imprinter door.
3. Insert the pins on the right side of the imprinter unit into the holes on the scanner. Angle the imprinter down 
into the scanner until the pins on the left side line up with the slots in the scanner. Gently press down on the 
imprinter unit until it clicks in place.
4. Connect the cable to the connection port in the scanner.
5. Close the pre-imprinter door when you are finished. 
Installing an Ink Cartridge
1. Turn off the scanner.
2. Open the imprinter door.
3. Remove the protective tape from the ink cartridge.
4. Move the ink cartridge carriage to the ink cartridge exchange position on the imprinter unit. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-169 5. Insert the ink cartridge into the carriage as shown in the diagram.
6. Lower the arms on the carriage to lock the ink cartridge in place.
7. Reverse this procedure to remove the ink cartridge when it is time to be replaced.
Adjusting the Printing Position
You set the horizontal start position by moving the ink carriage in the imprinter unit itself. Move the ink carriage 
left or right and align the arrow tab to the appropriate paper width indicated on the imprinter unit. The vertical 
start position is set in the scanning interface you are using. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-170
User Utility
The User Utility is a software program designed to help maintain and troubleshoot your Xerox scanner.
On installation you were prompted to place an icon on your Windows desktop. If you selected yes, simply double-
click on the user utility icon to open the software. 
If you do not have the User Utility icon on your desktop, follow these instructions for opening the utility from the 
Windows programs list:
1. Click on the start button on the Windows taskbar.
2. Click on All Programs.
3. Click on Xerox from the programs list.
4. Select User Utility to open the software.
If you are prompted to select a scanner, make sure your scanner is selected then click on OK.
Main Screen Options
This section briefly describes the options on the main interface of the User Utility. The following sections contain 
detailed instructions on using some of the options in this utility.
Scanner Status—this area displays the status of the scanner connected as well as error code details.
Error Code—this field displays an error code number to help you diagnosis and resolve hardware errors. Please 
see Scanner Error Codes on page 171 for the full list of error codes and steps to resolve the issue.
Scanner Information—this area displays the current hardware specifications of the scanner.
•Model: the scanner hardware model.
•Firmware Version: the scanner’s current firmware version.
•Memory: the amount of memory currently installed on the scanner.
•Interface: the connection interface to the computer.
•Imprinter: indicates if an imprinter is installed in the scanner, with a status of either Enable or Disable, and 
the type of imprinter installed. The imprinter is an optional accessory that you can purchase for the scanner. 
Please refer to our website www.xeroxscanners.com for spare part options available for your scanner.
Scanner Condition—the options in this section relate to software settings and maintenance for the scanner.
•Sleep Mode: clicking on this button opens a window for you to set the time frame for your scanner to go into 
power saving mode. Please see Setting Sleep Mode on page 174 for instructions.
•Clean Imprinter: clicking on this button initiates an automatic cleaning of the print head on the ink 
cartridge installed in the imprinter. When the imprinter is not installed this button is disabled. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-171 •Buzzer Setting: clicking this button opens a window for you to turn on or off the scanner beep sounds.
•User Shading: clicking on this button initiates the shading adjustment utility. The shading adjustment helps 
to improve image quality of scanned documents. Please see Shading Adjustment on page 174 for 
instructions.
•Caution Setting: clicking this button opens a window for you to set when to receive a notice that it is time to 
clean the rollers.
Scanner Counter—this section shows the number of pages scanned. Use the options in this window to keep track 
of maintenance performed on the scanner.
•System: displays the number of pages scanned through the ADF after the last counter update.
•After Clean Roller: displays the number of pages scanned after the last time the rollers were cleaned and 
the counter reset. Please see Cleaning the Inside of the Scanner on page 178 for instructions on monitoring 
and changing this setting.
•After Replace Roller: displays the number of pages scanned after the rollers have been replaced and the 
counter reset. Please refer to our website www.xeroxscanners.com for spare parts options and instructions 
available for your scanner.
•Update All Counters: clicking this button updates the current count display next to the 3 fields described 
directly above. The counters do not update automatically during document scanning, you must click on this 
button to display the current count information.
•Clear Counter: clicking either of these buttons clears the counters back to 0 for the appropriate section.
About—click on the About button to see more information about the application.
Help—clicking on this button opens the help file in the Adobe® PDF format.
Select Scanner—clicking on this button opens a window for you to select a different scanner if you have multiple 
scanners installed.
Save Info—clicking on this button opens a Windows Save As dialogue for you to save the current scanner and 
computer information into a .log file. 
Close—clicking this button closes the User Utility.
Scanner Error Codes
If an error occurs during scanning the LCD will display an error code and you can use the User Utility to 
troubleshoot and resolve the issue. The User Utility displays an error code and message in the Scanner Status 
field. The following table lists the codes, messages, possible causes and common resolutions.  
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-172 If you are unable to resolve the issue using the troubleshooting steps in this table, please refer to the section 
Troubleshooting on page 185.
Error 
Code
MessageCauseResolution
U11
U12
U13
U14
U15
U16
U17
U18Paper Jam and Paper 
Remains in Scanner 
errors.Paper has jammed while 
being fed through the 
scanner. 
Document sensors are 
dirty.Open the scanner, remove the pages, then 
close the scanner. Please see page 184 for 
complete instructions.
If problem persists, clean the rollers and paper 
sensors as described in the section 
Cleaning 
the Inside of the Scanner
 on page 178.
U20 A skew error has 
occurred. A page was pulled into 
the scanner at an angle.Open the scanner, remove the pages, then 
close the scanner. Adjust the paper guides to 
the document width. Restack the paper in the 
ADF and click Retry to continue. 
If problem persists, clean the rollers and paper 
sensors as described in the section 
Cleaning 
the Inside of the Scanner
 on page 178.
U23 A paper double feed 
has occurred.Two pages have fed 
through the scanner at 
the same time.Open the scanner, remove the pages, then 
close the scanner. Make sure there are no 
pages stuck together. Restack the paper in the 
ADF and click Retry to continue.
If problem persists, clean the rollers and paper 
sensors as described in the section 
Cleaning 
the Inside of the Scanner
 on page 178.
U24
U25
U26A stapled document 
has been detected.Either the page bent 
when it was picked up 
from the input tray, or 
the page skewed greatly 
as it was pulled into the 
scanner.Open the scanner, remove the pages, then 
close the scanner. Check all documents and 
remove any staples. Restack the paper in the 
ADF and click Retry to continue
U30
U31
U32
U33
U34A cover is open. A scanner access cover is 
open.Verify all covers on the scanner are fully closed 
before scanning.