Question about HP Officejet Pro L7780 All-In-One InkJet Printer

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Hp 7780 document feeder

The document feeder is not advancing paper from the document feeder; I have carefully taken it apart from the cartoons in the inside cover, but it is not laying back down straight so I have not got the problem fixed; the manual that came with the machine does not offer anything.
Any ideas?

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 105 Answers

SOURCE: HP laserjet 3055 has Document feeder jam errror

It sounds to me like the switch that senses when paper is present is blocked or out of position.

The User Manual and such does not provide sufficient detail for me to decipher what type of switch is used. It is either going to be a switch that is depressed to close the circuit when paper is present and is held down somehow now, or it is a proximity sensor and there is dirt or whatever on the sensor that is enough to make it think there is paper there. It should be something that appears to be a tiny window, and it would need to be cleaned with a qtip or 100% cotton cloth and isopropyl alcohol.

You will likely need to remove the ADF feeder cover to obtain full access to the ADF mechanism and find the sensor, since it is most likely recessed in the ADF quite a ways.

The other possibility is that the wire for the sensor has been damaged after a jam or something of that nature.

If you have searched for the sensor and cannot locate it / clear the error, then you will need to have a service tech work on the machine.

Posted on Jun 20, 2008

SOURCE: Adf pulls 2- or more pages in feeder.

open the ADF and clean the rollers and wooden cork pad and unplug the machine and press and hold the ON button for 1 min and release the button and plug it bak and it should resolve ur issue........

Regards raj_p5983

Posted on Jan 21, 2009

  • 58 Answers

SOURCE: Ricoh C21SF Automatic Document Feeder (ADF)

Take a little soap and a little water and clean the gray feed tire that is located in the document feeder. Check for any paper obstructions. If the machine has had a lot of prints I would replace the feed tire.

http://www.websitetoolbox.com/mb/copierquestions

Posted on Jan 23, 2009

  • 313 Answers

SOURCE: Doc feeder failure

clean the pickup rolls using alchole

Posted on Mar 22, 2010

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1 Answer

My printer comes up with an error saying Document in ADF


Hey there,
Your printer is giving you an error that a paper is jammed in the automatic document feeder. You need to lift up the cover for the document feeder and see if there are any papers stuck there. If you cant find any then go and shut off your printer and turn it back on. if its still giving you that error then there is a paper stuck and you might need to take apart parts of your printer to find it. It can be even a small piece so make sure you look carefully.
Hope this helps!!

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http://h10032.www1.hp.com/ctg/Manual/c01770356.pdf


Follow the instructions on how to "To clean the plastic strip inside the automatic document feeder" This is the closest you will be able to get to getting inside the paper feeder to check for the paper jam.

Feb 28, 2011 | HP Office Equipment & Supplies

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Doc feeder failure


clean the pickup rolls using alchole

Mar 21, 2010 | HP Office Equipment & Supplies

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When trying to use the scanner to make a copy of a document. The paper jammed, how do you remove it? It said on the glass window to remove the back where the ink containers are. I did that but I cannot see...


There are possible 2 places for the paper jam, either the Feeder has jammed or from the input tray.
For Feeder, you just have to open the feeder from the top and see if there are any pieces sticking in.
Else, you can open the print head cover and look for pieces of paper jammed in it.
Another place you may see is by removing the rear of the printer, it is called a duplexor which can be taken off easily. You may find some bits of pieces in rear of the printer.
To avoid getting another jam, try to keep the paper in a cool and dry place. If the paper absorbs any humidity, it starts crumpling which results in paper jam. You can also try fanning the papers before putting in a bunch and use a recommended paper for the printer.
Hope this helps.
Cheers...

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get rid of that hp piece o crust. demand your money back.

Mar 01, 2009 | HP Officejet Pro L7580 All-In-One InkJet...

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Brother MFC 8440 Scanner has a line


Whoaaaaaaaaaaa!!!!!!!!!!!!!!!!!!!!!!!!!! No need to da all that. Lift up the Doc feeder and look at the SMALL strip of glass, you will see a dot or something on it, clean w/alcohol. Voila taken care of. the dot ( pen mark, white out, etc...) makes a line because the document is Moving and that dot now looks like a line to the copier. :)

Sep 26, 2008 | Office Equipment & Supplies

1 Answer

HP laserjet 3055 has Document feeder jam errror


It sounds to me like the switch that senses when paper is present is blocked or out of position.

The User Manual and such does not provide sufficient detail for me to decipher what type of switch is used. It is either going to be a switch that is depressed to close the circuit when paper is present and is held down somehow now, or it is a proximity sensor and there is dirt or whatever on the sensor that is enough to make it think there is paper there. It should be something that appears to be a tiny window, and it would need to be cleaned with a qtip or 100% cotton cloth and isopropyl alcohol.

You will likely need to remove the ADF feeder cover to obtain full access to the ADF mechanism and find the sensor, since it is most likely recessed in the ADF quite a ways.

The other possibility is that the wire for the sensor has been damaged after a jam or something of that nature.

If you have searched for the sensor and cannot locate it / clear the error, then you will need to have a service tech work on the machine.

Jun 02, 2008 | HP LaserJet 3055 All-In-One Printer

1 Answer

Document jam


There is a sensor in the document feeder that most likely is stuck on the frame or the spring fell off and is not resetting. Have you taken a minela folder and run it through the feeder to be sure there is not a small fragmant of paper on the sensors? If you havent try that, or a piece of paper folded in half twice and keep sliding it though the feeder.
You would have to take the feeder apart to get the sensor set, That is best accomplished by taking the back cover off, then the left side cover, ( looking from the front) and disconnecting the feedder connectors, then removing it from the scanner.

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