Getting error message on okidata es3640 mfp saying scanner lock is locked

SOURCE: cannot remove "scanner locked"

What you need to do is look in the area where your copied pages come out, Between the paper tray and the bottom of the scanner.
On the underside of the scanner you will see a green latch, It is the only green item on the underside of the scanner. About 2 inches long and a half inch wide.
Turn off the machine, push that lever in, then, and it may resist some, pull it toward yourself until it snaps fully to the front of the machine.
Normally what happens is people hit it with the top of their hand removine their copies.
You can take a piece of electrical tape or duct tape and put over it to secure it in place.
You can also, remove the seal glass, the piece of glass about 1 inch wide on the left side of the scanner. It just has 2 phillips screws in it. This with the machine unplugged, and pop that green latch out and flip it around. There is a tab that will keep it from moving. That latch is for shipping purposes.

SOURCE: Scanner locked

also found that if you look down on to the scanner glass below it there is a blue plastic indicator showing if the scanner is locked or not. The adjuster for this is in the paper-out area so can get knocked by somebody grabbing the paper.

Just pull the blue switch towards you so the indicator is on the unlocked padlock, then turn the unit off and back on and that might fix it.

SOURCE: error message imaging unit is out

Hi rmcday: Here your problem. The imaging unit creates the image using an electro-photo process. The imaging unit consists of the following: ■ An OPC Drum ■ Waste Toner Assembly ■ Charge Roller Assembly 9.0 Consumables, Routine Maintenance Items and Options Item Life based on 5% coverage Part No. Replaceable by Black Standard Toner Cartridge Black High capacity 3,000 7,000 106R00679 106R00684 User replaceable Cyan Standard Toner Cartridge Cyan High capacity 2,000 5,000 106R00676 106R00680 User replaceable Yellow Standard Toner Cartridge Yellow High capacity 2,000 5,000 106R00678 106R00682 User replaceable Magenta Standard Toner Cartridge Magenta High capacity 2,000 5,000 106R00677 106R00681 User replaceable Imaging Unit 50,000 images 108R00593 User replaceable Transfer Belt 50,000 images 108R00594 User replaceable 500-Sheet Feeder N/A 119650600 Waste Toner Cartridge 3,000 to 5,000 pages (color 5%) 106R00683 User replaceable. Your imaging unit may have exeeded it life of 50,000 pages and will need to be replaced. Hope this helps

SOURCE: display says Scanner locked

There is a green switch located under the scanner area of the machine. You will also see a diagram of locked and unlocked padlocks. Just slide the switch to the unlocked position. Hope this helps.

SOURCE: scanner locked

Look where your copies come out and there is a switch on the top underside, (green on the M20i) and make sure it is in the unlocked position. You may need to wiggle the switch to fully unlock it. Mine was locked but I was able to re-engage flipping the switch several times.