Xerox Documate 3920 User Guide

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8Maintenance
This chapter includes:
•Safety Precautions on page 112
•Clearing Paper Jams on page 113
•Cleaning the Scanner on page 114
•Replacing the ADF Pad Assembly on page 117
•Replacing the Roller Assembly on page 121
•Xerox DocuMate 3920 Scanner Specifications on page 123
•Xerox DocuMate 3920 Parts List on page 124
This section contains information about maintenance, troubleshooting, scanner specifications, and 
spare parts. 
						

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Safety Precautions
When servicing the scanner you should take the following precautions to ensure your safety and 
prevent damage to the scanner.
Do These
• Wear protective gloves when cleaning the scanner with rubbing alcohol. Rubbing alcohol may 
irritate sensitive skin.
• Only perform scanner maintenance as described in this chapter.
• Keep the scanner and cleaning supplies away from any open flame or heat source as any form of 
alcohol is flammable.
• Always read the instructions in each section carefully, the instructions are specific to the part you 
are installing or servicing.
• Move the scanner to an area that has adequate room for opening the scanner.
• If your scanner has a power cord and/or power switch, always turn off the scanner and unplug the 
power cord before performing maintenance, unless the maintenance instructions below 
specifically state to leave the scanner plugged in and powered on.
• Always unplug the USB cable from the scanner before performing maintenance, unless the 
maintenance instructions below specifically state to leave the scanner plugged in.
• Wear an anti-static strap to prevent electrostatic discharge when touching metal components.
• Keep all cleaning supplies, scanner parts and accessories out of the reach of children.
Do Not Do These
• Never attempt installation of any part not described in this manual.
• Never service the scanner near a radiator or any other heat source.
• Never use aerosol sprays or compressed air, or attempt to lubricate parts with an oil or silicon 
spray.
• Never service the scanner in an area where there are open liquid containers.
• Never pour or spill liquid on the scanner or any of its components. 
						

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Clearing Paper Jams
If your scanner stops scanning due to a paper jam in the Automatic Document Feeder, a warning 
dialog box opens after a few moments.
1. Open the Automatic Document Feeder cover. 
2. Remove the jammed paper and close the cover.
To reduce the number of paper jams, smooth and straighten paper before scanning, adjust the guides 
to the paper size, and insert the paper evenly into the ADF.
NOTE: If the jammed page is too far in the scanner to be removed from the ADF, gently pull the page 
out from under the paper tray. 
						

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Cleaning the Scanner
Regular maintenance of your scanner can help to ensure continual optimal performance.
Cleaning the Automatic Document Feeder
You may need to clean the ADF feed mechanism if documents do not feed easily into the ADF, or 
several feed in at the same time.
To clean the ADF:
1. Wet a soft cloth with some Isopropyl alcohol (rubbing alcohol).
2. Open the ADF cover.
3. Wipe the feed roller from side to side. Rotate the roller to clean its entire surface.
NOTE: Please be careful when cleaning the roller. The roller is designed to rotate in one direction only. 
As you’re cleaning the roller, make sure it rotates easily, and continue rotating it in that direction 
while wiping it clean. Do NOT force the roller to rotate in the opposite direction. Forcing the roller to 
rotate will damage it, and may cause the scanner to feed pages incorrectly. 
						

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4. Wipe clean the ADF pad, ADF pad housing, and traction pad.
5. Close the cover when you’re finished.
Cleaning the Scanner Glass
Scanning items that have excessive amounts of dirt or dust may dirty the glass. To ensure the best 
quality scanned item, wipe the scanner glass with a soft, dry, clean cloth to rid the glass of dust or other 
debris.
If any residue remains after wiping the glass with a dry cloth, try adding a few drops of Isopropyl 
alcohol (rubbing alcohol) to the cloth and wipe off the residue.
NOTE: If lines appear on the images scanned with the ADF, but not on the Flatbed glass, the thin 
plate of glass used by the ADF may be dirty. This glass plate is at one end of the flatbed. When pages 
are pulled through the ADF during scanning, this thin glass plate is where the images are captured by 
the scanner.
ADF PadADF Pad Housing
Traction Pad
Clean the raised, thin 
plate of glass here if 
lines appear on scans 
from the ADF, but not 
from the Flatbed glass. 
						

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Cleaning the LCD-display
To clean the display surface, use a soft lint-free cloth, either dry or moistened with neutral detergent or 
ethanol. Do not use any organic solvents, acid, nor alkali solution. 
						

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Replacing the ADF Pad Assembly
The ADF pad may wear out and is designed to be a user-replaceable part. Problems with documents 
feeding into the ADF is an indication that the pad is wearing out. You should first clean the ADF 
following the instructions in the previous section Cleaning the Automatic Document Feeder on 
page 114.
You can order replacement ADF pad assemblies from the Parts & Accessories page for your scanner at 
www.xeroxscanners.com. Please refer to the section Xerox DocuMate 3920 Parts List on page 124 for 
ordering information. 
To replace the ADF Pad assembly:
Discard the parts as you remove them from the scanner, the parts cannot be reused and are a choking 
hazard. 
1. Open the ADF cover. The pad assembly is located inside the ADF.
ADF Pad Tension Spring
Traction Pad
Pad HousingADF Pad Parts List
ADF Pad Module 
and Traction Pad 
						

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2. Press in the top of the ADF pad housing and lift up to release the housing from the scanner. Rotate 
the housing up and out of the scanner.
3. Squeeze the plastic clamps that hold the ADF pad in place and lift the pad up and out of the 
scanner.
4. Remove the tension spring. 
						

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5. Place your fingertip under the top edge of the traction pad and pull up. The traction pad is held in 
place by two tabs on the underside of the pad, you will hear a “click” when it releases from the 
scanner.
6. Place the new traction pad in the scanner. Align the tabs on the bottom of the traction pad with 
the slots in the scanner. Press down on the pad to snap the part into the scanner.
7. Place the new tension spring in the slot in the scanner.
Slots for the
traction pad
Tension 
spring slot 
						

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8. Place the new ADF pad in the scanner and press down on the pad to snap it in place.
9. Place the arms of the ADF pad housing in the housing slots in the scanner, then rotate the housing 
down into place. Press down on the end of the housing to snap the housing in place. Note that the 
end of the housing piece will be held up slightly by the tension spring. 
10. Close the cover when you are finished.