Toner life i recived a message that toner life ended bought new toner then it gave me amessage that dust was on the drun took out the drum removed the dust now it says toner life ended again

why toner life end message keep on showing on sp 1200s prints.

You need to reset your Brother printer to get rid of the message

Brother International - Support for your Brother Product

If you open the front cover of your printer where you install the toner cartridge and press the "Clear/Back" button with it open, an option comes up on your LCD Display that says "Replace Drum?" press 1 to reset it. That should fix your problem!

Depends on the usage of the machine. If hardly used, you should get a years worth. But here's what you can do:

Open front cover

Remove drum unit and toner cartridge assembly

Put drum unit and toner cartridge assembly back in machine, but do no close front cover.

Press Clear/Back
You will get a message "Replace Drum?"
Select Yes to confirm

-open front cover
-press 'Option' button
-then key *00 on the keypad
-close front cover

hope it helps

If the drum is used up you open the front door and press menu or options and tell it it's a new drum, otherwise you clean the metal contacts on the sides of the drum and inside the printer, and run the blue tab back and forth about 20 times. If still drum error you may have a bad power supply.

I was getting the clean the corona wire problem message even after repeated cleanings.  Before this problem occured the toner light was flashing warning of low toner. When I got the clean the wire pop up the toner light was on all the time indicating the toner was depleated.  So, I thought I would try replacing the toner cartridge and see what happened. I opened the new toner box and noticed on the foil packege specific instructions to clean the corona wire when installing the new toner.  I installed the new toner and cleaned the wire one more time. I then reinstalled the drum and toner assembly into the printer and the clean the corona wire message did not come up again.  The printer now works fine. 

Open the door where the toner goes. Press the 'back' button. Press *00. Do not respond to the query about the drum. Close the door. Other models may have to press the 'Options' button located near 'Copy'. This should work.

i solved the brother mfc8860 toner life end problem
hi guys my name is reedwaan. Im new at this site so please listen up 
my brother toner i refilled with toner and inserted it. It said toner life end then i patched the windows close on the sides and still the same problem, then i removed the toner and loosened the two screws on the left by the gears then removed the cover of the gears. 
Right at the back there is a funny looking gear with a spring behind it. All you have to do is pull the spring a little bit clockwise and push the gear back on hooking the spring into it so that the gear is spring loaded. close it up then test it, It took me a while to figure it out but i got it right. 
NB*  The gear that you push on, is the toner reset gear and when you push it on make sure the teeth dont interlock with the second gear on the left of it. If you have any queries mail me on reedwaan@yahoo.com 
glad to help out