After a paper jam
this is a common alarming message, it also occurs intimes of abrupt power interruptions.
It is true that this might end up being a technical issue, however from your explanation it is as a result of a paper jam.
fine before we get down to technical solution WE HAVE TO USE ELIMINATION METHOD IN SOLVING THIS -NOTE THAT YOU HAVE TO BE VERY CERTAIN OF YOUR FEED BACKS/ CLARIFICATION.
POINT 1 - cover open
Are all the cover closed tightly and in place, Do you hear a clicking sound when u shut the cover?
POINT 2 - multiple sensor failure
caused by paper jams and the paper shatters /tares inside the printer : At such time the paper was forcefully /ignorantly pulled off the printer from either AB cover or the paper tray.
In such cases the printer will issue all sorts of error messages not limited to error 6022 to the common paper jam error.
Remedy: open cover AB, study the transfer unit (the hot part), all level sensors (things like seasaws) -- remove all loose paper parts .
better still download this PDF and Do a thorough quest
having done that ur printer should work.
POINT 3 - Low Power
Is your printer on a UPS or some sought of power devices. Remove those devices and put the printer on DIRECT power outlet.
Sorry but we gonna go technical from here :)
POINT 4: Loose addons / peripherals (elementary)
Remove the waste Tonner collector, photo conductor and the transfer unit buy opening cover A. inspect the last two items for paper traces.--- Attention photocoductor is light sensitve and should not be touched on its green surface. pay particular attention to the moving parts i.e the gears.
restore the above making sure they enter firmly. Power on your printer. It should work. if not you may try doing the same to the toner catridges.
POINT 5 : Loose Rom Module
Did it really go loose ? May be or Not. Or during the process of removing paper the printer was lifted / Tilted and some culprit (dust) fell on the ROM which is placed horizontally inside the printer.
U require a STAR screw driver. Opposite cover A , the only metallic side of your printer u will find some sticker in yellow with writings bla bla bla - dont open here. Open the protruding part on the Right, it has 5 screws.
The ROM is something that looks like a half sized credit card put in some type of Socket
Find the Rom, Blow it (simply by mouth) and Push it in NOTHING ELSE.------------ WARNING, WIPING, TOUCHING -TOUCHING,CLEANING WITH CHEMICALS ARE TOTALY PROHIBITED.
I hope this fixes your problem, i have managed to recover from such problems severally