Xerox Documate 4790 User Guide

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-173
Fxx System error occurred. An unknown system 
error has occurred.Reset the scanner and computer:
1. Turn off the scanner power.
2. Unplug the USB cable and power from the 
scanner.
3. Reboot (restart) the computer.
4. Plug the USB cable and power cable back 
into the scanner.
5. Turn the scanner back on.
If you are still unable to scan, contact Xerox 
Technical Support. Please refer to the Technical 
Support Card you received with the scanner for 
contact information.
— **Warning**
The rollers need to be 
cleaned.The number next to 
After Clean Roller:, in 
the User Utility main 
screen, has exceeded the 
maximum number 
between cleaning.The rollers should be cleaned every 20,000 
scans, or as needed if your scanner is 
experiencing frequent paper feed issues. After 
cleaning the rollers click on Clear Counter to 
reset the cleaning roller count back to 0. Please 
refer to 
Cleaning the Inside of the Scanner 
on page 178.
— **Warning**
The rollers need to be 
replaced.The number next to 
After Replace Roller:, in 
the User Utility main 
screen, has exceeded the 
maximum number 
between replacement.The rollers should be replaced every 400,000 
scans, or as needed if cleaning the rollers does 
not improve paper feeding issues. After 
replacing the rollers click on Clear Counter to 
reset the roller replacement count back to 0.
— **Warning**
Insufficient front light 
error occurred.
Insufficient back light 
error occurred.Either the lamp is not 
bright enough or the 
scanning sensor is not 
registering the light 
strength.Contact Xerox Technical Support or your 
authorized service technician. Please refer to 
the Technical Support Card you received with 
the scanner for Xerox contact information.
— **Warning**
The front reference 
plate is dirty.
The back reference 
plate is dirty.The front or back 
scanning background 
plate is dirty.Clean the background reference plates as 
described in the section 
Cleaning the Inside 
of the Scanner
 on page 178.
— **Warning**
The scanner’s image 
sensor cover is dirty 
and requires routine 
cleaning.The image sensor cover 
in the scanner is dirty.Clean the image sensor as described in the 
section 
Cleaning the Inside of the Scanner 
on page 178.
— **Warning**
Scanner is not 
connected.The power is off, the 
power cord or USB cable 
is unplugged.Verify cables are securely plugged into the 
scanner, computer and wall. If needed, reboot 
the computer.
Error 
Code
MessageCauseResolution 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-174
Setting Sleep Mode
Your scanner has a built-in power saving feature that sets the scanner into low power when the scanner has been 
sitting idle for 15 minutes. This default setting conserves power and complies with the ENERGY STAR 
requirements. Power saving extends the life of the lamps by turning them off when not in use.
1. Open the scanner User Utility application.
2. On the main window click on the Sleep Mode button.
3. When the Sleep Mode window opens, select the options you want.
Waiting Time—you can click the up or down arrows to change the Sleep Mode time from 1 to 60 minutes, or 
you can type a numerical value in the text box between 1 and 60.
4. Click OK to save the changes and close the Sleep Mode window.
Buzzer Setting
1. Open the scanner User Utility application.
2. On the main window click on the Buzzer Setting... button.
3. When the Buzzer Setting window opens, select the option you want.
Buzzer Setting—click on either On or Off to set the scanner alert sounds. Scanner alert sounds include 
double-page-feed detection, paper jam error, lamp errors, etc...
4. Click on OK to save the changes and close the window.
Shading Adjustment
The shading adjustment is used to improve the image quality of the scanned documents. If your final scanned 
files are of poor quality, such as perpendicular lines or the image clarity is uneven across the page, you may need 
to perform a shading adjustment on the scanner.
To prepare for shading adjustment:
• Clean the scanner rollers, image sensors, glass and reference plates, as described in the section Cleaning the 
Inside of the Scanner on page 178. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-175 • After cleaning the scanner, do a test scan and view the final image file. Do not perform a shading 
adjustment until after you clean the scanner and test scan. A shading adjustment performed before cleaning 
the scanner may result in degraded image quality.
• Have the Shading Paper, provided with your scanner, ready as the software will tell you when to insert it into 
the scanner.
• Make sure the Shading Paper is in-like new condition. 
The Shading Paper should be kept in the plastic bag between the stiff cardboard when not in use. 
If the Shading Paper is creased, torn, soiled, crumpled or dirty, the image quality will degrade instead of 
improve after performing the Shading Adjustment. 
If your Shading Paper is not in like-new condition, please order a replacement at www.xeroxscanners.com in 
the Parts & Accessories page for your scanner.
• Change the front and back background reference plates to white. Please refer to the instructions in section 
Changing the Background Color on page 161. During the shading adjustment you will need to change the 
background color to white then to black. After the shading adjustment is complete, choose the color you 
want the background to be.
To complete a shading adjustment:
1. Open the scanner User Utility application.
2. On the main window click on the User Shading... button.
3. Click on Start Shading to begin the shading adjustment. The shading adjustment utility will guide you 
through the rest of the steps.
4. When prompted to clean the scanner click on OK to proceed only if you have already cleaned the scanner 
during preparation. Otherwise, follow the instructions on screen and clean the scanner. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-176 5. Change the background plates to white then click on OK to proceed. 
Close the scanner before continuing with the shading adjustment.
If you have already changed the plates to white you will not see the above message. Proceed to the next 
step.
6. Place the Shading Paper in the scanner’s input tray in the Landscape position then click on OK.
7. The scanner will pull the Shading Paper through as it sets the adjustment for the white background plate. 
The Now Adjusting message box will close automatically when the white background Shading Adjustment is 
complete.
8. After the white background shading adjustment is complete, you will be prompted to change the 
background plate to black to continue with the black background shading adjustment.
Change both the front and back scanning background reference plates to black then click on OK. Note: Do not stop the shading adjustment after it has started. When the scanner pulls the shading paper in it 
will pause several times. This is the expected behavior. The shading adjustment with the shading paper will take 
about 5 minutes to complete. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-177 Note: Do not place the Shading Paper in the scanner. The Shading Paper is not used for the black background 
shading adjustment.
9. The Now Adjusting message box will close automatically when the black background Shading Adjustment is 
complete.
10. Click on OK to complete the shading adjustment.
Restoring the Default Shading Adjustment
You can reset the shading adjustment to the factory default setting if completing a shading adjustment does not 
improve the image quality. 
1. Open the scanner User Utility application.
2. On the main window click on the User Shading... button.
3. Click on the Restore Default button.
4. Click on OK to restore the factory default adjustment.
5. When the adjustment has been restored, click on OK to close the User Utility shading restore window.
Cleaning the Outside of the Scanner
Excessive dust accumulation around and on the scanner will pull into the scanner during the scanning process 
and clog the ventilation openings. You should clean the outside of the scanner at least once a month to help limit 
the amount of dust build up in the scanner.
Note: You will need the blower brush provided with your scanner and a soft dusting cloth to clean the scanner.
1. Turn off the scanner power. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-178 2. Using the blower brush, brush away any dust build up around the ventilation openings. 
3. Using a soft dusting cloth, wipe down the body of the scanner, input tray and exit area. Make sure that the 
input and exit slots in the scanner are also clean. 
4. If there is any accumulation of dust in the indentations around the buttons, use the blower brush to gently 
brush away the dust.
5. When you’re finished, press the power button to turn the scanner back on.
Cleaning the Inside of the Scanner
Cleaning the inside of the scanner helps to keep your scanner operating at optimum performance. You should 
clean the inside of the scanner at least once a week or after 20,000 pages have been scanned. If you are getting 
frequent paper jams, multiple pages feeding at the same time, or you’re seeing lines in the scanned image, it is 
time to clean the scanner.
Note: When cleaning the rollers, do not rub the roller cleaning paper vigorously back and forth across the roller, 
this will shred the roller cleaning paper and leave debris in the scanner.
Safety Precautions
Warning: The roller cleaning paper is moistened with Isopropyl rubbing alcohol. Please read and follow these 
precautions to ensure your safety.
• Keep the roller cleaning paper away from fire, heaters or any open flame or heat source as any form of 
alcohol is flammable.
• Wear protective gloves as the roller cleaning paper may irritate sensitive skin.
• Only clean the rollers and scanning areas, as described in this section, with the roller cleaning paper.
• Do not leave the roller cleaning paper or bag where children can access it.
• Always turn off the scanner and unplug the scanner’s power and USB cable prior to using the roller cleaning 
paper.
Preparation
• You will need one of the roller cleaning papers provided with your scanner. Each roller cleaning paper should 
only be used once. Additional roller cleaning papers can be purchased from our website at 
www.xeroxscanners.com in the Parts & Accessories page for your scanner.
• When cleaning the inside of the scanner, you should clean all of the rollers, scanner glass and background 
plates at the same time. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-179 • Use scissors to open the roller cleaning paper bag, cutting across the dotted line.
Cleaning the ADF Rollers
1. Pull on the scanner cover release and lift the lid to open the scanner. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-180 2. The following illustration shows where the rollers are located in the scanner. 
Use a roller cleaning paper to clean all of the rollers indicated in the illustration.
Note: Be careful when cleaning the rollers. All of the rollers, except the free rollers, are designed to rotate in one 
direction only. Do NOT force the roller to rotate in the opposite direction. Forcing the roller to rotate will damage 
it, and cause the scanner to feed pages incorrectly. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide9-181
Reset the Roller Count in the User Utility
After cleaning the scanner you need to reset the roller count in the User Utility.
1. Open the User Utility application.
2. From the main screen click on Clear Counter next to the field After Clean Roller.
3. The clean roller count will now be reset to 0. 
4. Close the User Utility.
Cleaning the Scanner Glass and Background Plates
1. Pull on the scanner cover release and lift the lid to open the scanner.
2. The following illustration shows the location of the glass and background plates in the top and bottom of the 
scanner. The background plates are rollers that you can rotate to change from black to white. While cleaning 
the background plates, rotate the bars to clean the entire surface. 
						

							Scanner Options, Maintenance and Troubleshooting
Xerox
® DocuMate® 4790
User’s Guide 9-182 3. Use a soft cloth to wipe off the scanner glass and background plates. If there is sticky residue on either 
surface you can use the roller cleaning paper to remove it.
Cleaning the Paper Sensors
The scanner has several sensors to detect the status of the paper when it is in the scanner. You should clean these 
sensors as part of your standard weekly maintenance of the scanner.
Note: Do not clean the sensors with the roller cleaning paper.
Preparation
• Turn off the scanner prior to cleaning the sensors.
• Locate the Blower Brush accessory that was provided with your scanner, this is what you will use to clean the 
sensors.
• Remove the brush tip from the Blower Brush and set it aside, you will be using only the blower to clean the 
sensors.