How to reset paper jam sensor in laserjet 1020

Hello !!

For tha particular error you are facing, here is the reason. These printers have a switch that triggers an interrupt when the toner door is closed. Usually there is an arm on the door that pushes the switch. It is quite sensitive and delicate. Then sometimes there is a tab on the printer's toner and if that breaks off then that error will be generated.

But in your case as you have not removed or inserted the toner, I think option 1 is applicable to you.

Now, if this printer is in warranty you should send it to HP for Free repair/replacement.
and chek BLOW links too for paper jam and cleaning
Paper jam Message Displays for HP LaserJet 1018 1018s 1020 and 1020 Plus... Cleaning the Printer


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I would advise also opening the door on the back of the printer (if this printer has one), removing any paper trays and cartridges too. All of these can obscure places where paper can jam. Be thorough as even the tiniest scrap can cover a vital sensor.

Jams

Clearing jams

CAUTION Do not use sharp objects, such as tweezers or needle nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.

CAUTION Always pull jammed media in the direction it would travel through the paper path.
Do not pull jammed media against the direction of travel through the paper path to avoid damage
to the printer.

To prevent damage to the printer when clearing jams, including jams in the output bin, always open the
print-cartridge door and remove the print cartridge. Keep the door open and the cartridge out until the
jam has been cleared. Opening the print-cartridge door and removing the print cartridge relieves tension
on the printer rollers, which prevents damage to the printer and makes the removal of jammed pages
easier.

Occasionally, media becomes jammed during a print job. You are notified of a media jam by an error
from the software and the printer control panel lights. See Control-panel lights (HP LaserJet 1010 series
printers) on page 102 or Control-panel lights (HP LaserJet 1020 printer) on page 106.

The following are some of the causes of media jams:

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The input trays are loaded improperly or are too full. See Loading media on page 25.

NOTE When you add new media, always remove all of the media from the input tray and
straighten the stack of new media. This helps prevent multiple sheets of media from feeding
through the printer at one time, reducing media jams.

The media does not meet HP specifications. See Media specifications on page 21.

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Typical media jam locations

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Print cartridge area: See Removing a jammed page on page 43.

Input tray area: If the page is still sticking out of the input tray, gently try to remove it from the input
tray without tearing the page. If you feel resistance, see Removing a jammed page on page 43.

Output path: If the page is sticking out of the output bin, see Removing a jammed page


NOTE There might be loose toner in the printer after a media jam. This toner clears up after
a few sheets are printed.

Removing a jammed page

Use the procedures in this section to remove a jam.

CAUTION Media jams might result in loose toner on the page. If you get any toner on your
clothes, wash them in cold water. Hot water will permanently set the toner into the fabric.


Partshere Troubleshooting

CAUTION To prevent damage to the printer when clearing jams, including jams in the output
bin, always open the print cartridge door and remove the print cartridge.

To prevent damage to the print cartridge, minimize its exposure to direct light. Cover the print
cartridge with a sheet of paper.

NOTE The following illustrations show the HP LaserJet 1020 printer. The same procedure is
used to remove a jam in the HP LaserJet 1010 series printers.

1

Open the print cartridge door, and remove the print cartridge.

2

Grasp the middle edge of the side of the media that is most visible, and carefully pull it free from
the printer.

CAUTION Do not use sharp objects, such as tweezers or needle nose pliers, to remove
jams. Damage caused by sharp objects will not be covered by the warranty.

CAUTION Always pull jammed media in the direction it would travel through the paper path.
Do not forcefully pull jammed media against the direction of travel through the paper path to
avoid damage to the printer.


3

When you have removed the jammed media, replace the print cartridge, and close the print cartridge
door.

After clearing a media jam, you might need to turn the printer off then on again.

NOTE When you add new media, remove all of the media from the input tray and straighten
the stack of new media.

Did this just suddenly happen or was it after you replaced the toner cartridge or opened the door?
I have found that if the toner cartridge is not completly positioned into the printer, it can give this error.

The only part of the printer that you ned to get at is under the toner cartridge. Open door, remove toner cartridge and vacuum dust. If you are referring to black toner dust on the fuser roller ( where paper comes out of printer ) that is alot harder job.

Check the following steps for fixing Hp Carriage Jam Error :

Open the print carriage access door. Check for any packing material that may be blocking the internal components. Check for an orange shipping lock that may still be in place on the left side. Pull the shipping lock out, if present, and discard.

Remove and reinstall the cartridges to make sure they are properly installed. Lift the front center of the print carriage access door to open it. Lift the door up until it locks into an open position. Press down on a print cartridge and allow it to spring back up. Lift the cartridge out of the printer. Do the same for the other cartridge. Slide the black cartridge into the slot on the left and the color cartridge into the slot on the right. Press down on each one to lock it into place. Lower the print carriage access door.

Check the print cartridges to make sure the protective tape has been removed from the ink nozzles. Remove the cartridges from the printer. Remove any tape or labels. Replace the cartridges into the printer.

Push in on the tab on the left side of the clean-out door on the back of the printer to open the door. Lift the door out of the printer. Check for any paper jams. Jammed paper can block the printer cartridge carriage from moving. Pull any jammed papaer out.

off your printer and manually feed paper by turning roller as guide, observe if sensor key freely move when paper pass, some sensor key stock when forcefully remove the jam paper inside.

Hi all of you

1. check paper sensor.
2. check that return every thing proper cartridge and the door.
3. move the gear system manually.

Hope this fix your problem,
thanks

hamedo

Had the same problem. Changed cartridge. Still didn't work. I suggest taking out cartridge and examining inside of printer carefully. I found a piece of balloon and a hair tie (aargh!, my kids). Works now.
Just wanted to post this as one more thing to check before junking the printer or spending money on HP support.

REmove cartridge, and open rear door, might be all scrunched in very back fuser unit, if you can't remove it without damaging the rollers then it will need to be pulled to bits