The front rollers on the scanner will not come down. I can scan by adding more papers to the stack so the papers reach the front gray rollers. I have tried cleaning the rollers and spraying it with air to clean the scanner but nothing has helped. Sometimes the rollers will come down and start working again but it keeps getting worse and worse.

Troubleshoot this issue step by step:

Check the Feed Selection Lever:
Ensure that the Feed Selection Lever (located on the lower left side of the front of the scanner) is in the correct position (up) for separation.
Straighten the edges of the stack of documents to be scanned.
Set the document guides so they are wider than the document to be scanned.
Place the documents face up into the feed tray, ensuring they touch the document stoppers.
Clear Any Jammed Paper:
Be careful when removing jammed paper to avoid cuts.
Remove any documents that have been left in the eject tray.
Close the document eject tray.
If the document ejection is stopped partway, perform this operation with the document eject tray extension open.
Hold the upper unit as shown in the diagram and open it to the point where you can remove the jammed document. The pickup roller is located in the middle of the upper unit. Do not hold the protrusion on the upper unit when opening it, as it may deform the pickup roller or cause a feeding error.
Close the feeder cover.

If the jam occurred in the feed section, pull the document out carefully without applying too much force. Be sure to remove any torn parts remaining in the scanner.
Close the upper unit slowly, ensuring it clicks into place. Do not force it to close, as this may damage the scanner.
After removing the jammed paper, check if the last page was scanned, and then continue scanning.

Rapid Recover System:
If a paper jam occurs when the "Rapid Recover System" is enabled in the ISIS/TWAIN driver settings, the image of the document is not saved, and scanning stops. You can continue scanning from the document that caused the paper jam after fixing the issue.

Additional Considerations:
Make sure the pickup rollers retract when the machine is powered on.
Check that the stopper plates are in the down position.
Verify that the upper unit is completely closed after clearing the jam.
Remember to handle the scanner components carefully to avoid damage. If the issue persists, consider seeking professional assistance or contacting Canon support for further guidance

check your paper thickness setting in your drivers
2. clean separation pad at the bottom of the paper tray
3. clean rollers located after the pick up area(registration rollers)
4. check actuators for the sensors to see if they are sticking

Looks like a document jam as the paper rolled up under the scanner bed.
Do you have the manual for the unit?
It is on line at mypdfmanuals.com. Just google it!

1. Lift the document release lever.

If a multi-page document is loaded, remove
the entire document from the ADF.

2. Lift the paper stack cover and pull it out completely.

Make sure the back end of the cover does
not catch the front paper guide.

3. Lower the scanning platform in the document delivery slot (this is on ththe front of the machine - a small tab you push down.

4. Carefully!!! pull out the jammed document - do not wrench it out.

5. Lift the scanning platform back into place.

6. Inset the paper stack cover (that you took out earlier.

Found it here http://mypdfmanuals.com/dref/815752

Hi,
Thank you for contacting Fixya.
This error is detected when one of the followings occurs: (TWAIN Error-Paper jammed in the ADF - Code DS32002), Scanner panel error-U1
1) A document does not reach the TOP sensor while the scanner has transported the document about 250 mm to pick. (The scanner performs retry operation.) 2) The trailing edge of a document does not reach the TOP sensor after the scanner transports the document by the length (L) below. (The document may have slipped on the rollers) Check the followings: 1.Scan condition - Transported length (L) before jam 2.ADF fixed size - scanning Approximately 450 mm 3.Long paper scanning -1.2 times of the specified value
If the imprinter is installed, paper jam can occur in the following case. If the scanner starts scanning when the imprinter cable (EXT cable) is not connected to the scanner, it does not rotate the imprinter, since it recognizes the imprinter not installed, which results in paper jam in the imprinter section.
Solution:
Remove the jammed document and close the ADF. When the error frequently occurs, refer to the followings:
1. Do the documents satisfy paper specification? Please read the operator guide for paper specification. 2. Have the documents been jogged? • Align the edge of documents for stable paper feeding. • Remove documents with crease or dog-ear. • Scanning different width of documents may cause skew and result in paper jam. 3. Is the Imprinter EXT cable correctly connected to the scanner? Check the cables. (only when the Imprinter is installed) 4. Clean rollers in ADF and Imprinter and see if the error is removed. (only when the Imprinter is installed) 5. Replace Pick roller and Pad ASY and see if the error is removed. Check the consumable counter from the TWAIN driver screen. When the counter exceeds the values shown, replace Pick roller or Pad ASY.
If the above do not help, then the issue could be caused by the followings:
6. Malfunction of TOP sensor. 7. Malfunction of Cover open sensor. 8. Faulty Scanner Control PCA.
If Imprinter is installed, then the issue could be caused by the followings:
1. Malfunction of Sensor OPB5 lever (only when the Imprinter is installed). 2. Malfunction of Motor LF if the imprinter roller does not rotate.(only when the Imprinter is installed). 3. Faulty Imprinter Control PCA. (only when the Imprinter is installed).
Hope the above information is helpful.Please revert if you have any doubt.
Regards,
TechSatya

Hi,problem can be solved. What particular code is it displaying?.
It all determines the type of code error,so we can be able to know how to describe the solution better.

But here are some codes for you to check out and see if one of them is the fault of the machine.

• E000: The main thermistor reading does not reach 40ºC 14 sec after the fixing heater goes ON. (fixing low temperature error)
• E001: The main thermistor reading reaches 220ºC or higher.
• E002: A start-up fault is detected under any of the following conditions of the main thermistor
• E003: After the end of the WAIT period, the main thermistor reading is 100ºC or lower. In standby, the sub thermistor reading is 50ºC or lower.
• E004: At time of initialization, the ZEROXI signal of the power supply is not detected. During temperature control, the ZEROXI signal does not arrive for 3 sec continuously. A short circuit is detected in the triac
• E010: A specific revolution is not detected from the main motor rotation detection signal.
• E100: When the scanner motor is started up, the BD input signal does not arrive within a specific period of time.
• When the scanner motor is started up, the motor rotation is too fast, and fails to reach a specific revolution within 20 sec at time of deceleration. While the scanner motor is rotating at a specific speed, the BD input signal cycle is not within a specific range (±2%) for an equivalent of 10 mm (print distance). While the scanner motor is rotating at a specific speed, the BD input signal cycle is not as indicated (±2%).During the WMUPR period after the power switch has been turned on or the front cover/left cover has been opened/closed, the drum unit is absent.
• E719: The communication between the card reader and the image processor PCB is disrupted.
• E805: After the heat discharge fan drive signal is generated, the fan lock detection signal does not arrive for a specific period of time.
• E500: An error has occurred in the communication between the machine and the finisher twice continuously.
• E514: The stack delivery belt does not reach home position when the stack handling motor (M2) is driven for a specific time (CW; if the same condition occurs during stack delivery, a jam will be identified).
• E530: The rear aligning plate does not reach home position when the rear alignment motor (M4) has been driven for a specific time.The rear aligning plate does not reach home position when the rear alignment motor (M4) has been driven for a specific time.
• E531: The stapler does not leave the stapling home position sensor (S13) within 0.5 sec after the stapler motor (M6) is rotated CW.The stapler does to return to the home position sensor (S13) within 0.5 sec after the stapler motor (M6) is driven CW and, in addition, it does not return to the sensor within 0.5 sec after the motor is driven CCW thereafter.
• E537: The front aligning plate does not reach home position when the front aligning motor (M3) is driven for a specific time.The front aligning plate does not leave home position when the front alignment motor (M3) is driven for a specific time.
• E551: The delivery fan rotation signal (FNALCOK) does not arrive within 1 sec when the heat discharge fan drive signal (FANON) is sent.
• E577: The return roller does not reach home position when the delivery motor (M1) is driven for a specific time. (If the same condition is detected while alignment takes place in the direction of feed, a jam will be identified.)
• E580: The stack tray upper limit sensor (S1) goes ON while the stack tray up/ down motor (M5) is in operation.The clock signal of the stack tray up/down clock sensor (S9) is not detected 15 times or more within 0.8 sec while the stack tray up/down motor (M5) is in operation.It does not reach the stack tray paper height sensor (S10) 2 sec after the stack tray up/down motor (M5) rotates for ascent.It does not leave the stack tray power height sensor (S10) 2 sec after the stack tray up/down motor (M5) starts to rotate for descent.
• E585: The stack retaining lever does not reach home position when the stack handling motor (M2) has been driven for a specific time (at the start of motor CCW rotation). (If the same condition is detected during stack delivery, a jam will be identified.).

If you still need more help, will be waiting for your comment.


Take care.

Hi
what size page are you trying to scan, if they are smaller than the gap between the transport rollers, they will not feed.

the single sheet problem you have:- the scanner knows when there is paper to feed when the sensor is pushed up beside the pick roller and it will put the tray down again when the rollers are pushed up. sometimes the little plastic sensor to the left of the roller gets a bit stuck and needs to be freed, it wares itself out where it hinges inside the cover around the pick roller. just unclipping it and cleaning it is usually enough.

good luck.

What you want to try it take a blank paper and on the middle of the page on front put a small ammount of rubbing alcohol on it, then enter the paper into the scanner and hold it so you jam it as it feeds. Then look at the area you placed the alcohol for the presence of some dirt, a blackish smear will normally appear on the paper, Do that 4 or 5 times and that will clean the wheels well. If it helps, then most likely you have just textured the rollers for a short period of time and they should be replaced. But the reason why you want to try that is to be sure the problem is slipping by the roller texture and not the roller drives, ( a clutch or motor). But since it sounds like you give your scanner a workout, the rollers are most likely the problem. Replace all the feed rollers and also look for a pad that presses against the feed roller. Depending on the type of scanner there will be either one roller that barely moves or a rubber pad that is called a skid or ****** pad, what they do is limit or ****** the feed of multiple sheets of paper. I would recommend replacing that , pad or stationary roller, it is important in feeding.

The 3 paper sensors are located along the center of the paper path. They are: Registration (lever type) on the bottom between separation & registration. Look for lever damage or torn paper. Scan Start (reflective) on the top between registration & front reading roller. Clean the sensor window with qtip & alcohol. Delivery (lever) at the eject roller. Same as reg, but harder to see due to location.The feed roller exchange kit is 6915A001. The rollers in this machine are not considered user replaceable. 

Is there a gear grinding noise associated with this? If so, call your local dealer for service. If not:Clean all the rollers you can reach with a cloth dampened with alcohol. Check for any obstructions in the paper path like torn paper, heavy toner buildup on guide plates or the edges of the scanning glass, or any paper guides obviously loose or out of place.