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To reset the sensor after installing a new toner cartridge follow these steps.
1. With unit powered On, open the front cover.
2. Press the "Options" key. Display will show "Replace Drum?"
3. Press "Start" key.
4. Press 1,0 .
5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".
6. Close cover and see if Toner Life End error message has gone.
Please note that this must be done with a new cartridge so the unit will see that there is toner in the cartridge.
Remove any paper trays. Inspect them for wrinkled or damaged paper.
Also open the back cover of the printer if this model has one.
Open any other doors that give access to the printer's paper path and to the toner or ink cartridge.
If necessary, remove the toner or ink cartridge. Place it away from light/ sun light to avoid damaging it.
If you find a piece of jammed paper, remove it by holding it with both hands and pulling firmly. The goal is to keep the paper from tearing. If several pieces are jammed together, try pulling out the middle piece first to loosen the jam.
If the paper does tear, try rotating the roller gears manually to free the paper. Don't force anything, though. Do this step especially if the jam message comes up repeatedly without any obvious paper jam, there may be a small tear of paper inside.
Ones the printer is free of paper Replace the toner or ink cartridge and paper trays, close any doors you opened and turn the printer back on.
If the printer paper jam message still appears, then there is still some paper in the printer. Reinspect the paper path.
see alternative if the problem is still not solved.
alternative : Load a piece of thick paper, for example photo paper and press the resume button (may be diffrent button on diffrent models) a few times to the printer picks up the paper and puts it through the machine.
Turn the machine
around so that you are facing the back. Open the back cover. Pull down
smaller roller cover inside the machine. If you look closely
at the second smaller cover, on the right hand side (closer the the
inside of the machine), is a very thin round piece of plastic that is
only half the
length of the smaller cover. There are 2 thin plastic
tabs attached to either end of this round piece of
shift this over so that the 2 plastic tabs can now go into the space
provided for them. I had to move mine over only 1/4 inch.
There is an interlock switch or sensor on all the covers. You need to open the cover and look for an opening in the cover it closes against. In those openings there are normally switches that a tab turns on to let the machine know the cover is closed.
The switch may have become dislodged, or more likely, the tab on the cover that hits the switch to actuate it has broken off and is not hitting the switch giving you that message.