I installed a new cartridge in Brother MFC-7860DW after the old one was getting light. It's very new but the message "Replace Drum" is on and the printer won't print. Drum counter shows 12,022 pages. I have never reset it. How do I remove the error message and start printing again?

SOURCE: new ink cartridge istallation: Brother MFC-240

I guess you d used generic ink carts?!
If yes, the cart holder needs replacement due to ink that has stained the led control. The ink has made a short circuit. The error can only be deleted by replacing the whole cart holder!

SOURCE: Brother HL-5240 drum light flashing

Normally clearing the drum count the machine has to be on open front cover as if to change the drum press and hold the button in for about 10 second then release and shut the door. This should reset the count if not please get back to me and I'll check the service manual to see if anything in that.

Thanks J

SOURCE: my brother mfc-7840w printer keeps telling saying

The drum is the photosensitive roller that the image is charged onto so I'm afraid cleaning the corona wire won't help. If the drum is removeable try reseating it, otherwise it looks like you may need to buy a new drum kit for it.

SOURCE: unable to clean ... Brother MFC 3240C

Machine Error 46, Purged Ink Box Full

The machine counts all purge (cleaning) operations in order to prevent the internal ink absorber box from overflowing with purged ink. An initial purge, for example, advances the purge counter by 187 420 = 607. When the purge counter approaches 6400, an internal "Machine Error 46" is generated. Further purge operations are prohibited, and therefore the printer becomes unusable.

When an internal Machine Error 46 is generated, the user will see an "Unable to Clean" external message and will be unable to use the printer. The "Unable to Clean" external message can relate to many different internal error codes however.

The user can establish the internal Machine Error Code as follows: unplug the unit, hold down the Menu/Set key, re-insert the power plug while holding down the Menu/Set key. The internal Machine Error Code will be displayed. Unplug and re-plug the unit again before continuing to the steps below.

If there is a Machine Error 46, it is necessary to dismantle the printer, replace the ink absorber box (or possibly break the ink absorber box open and clean its absorbent sponges under a tap), re-assemble the printer and reset the purge counter to zero.


Resetting purge counter:

1) Enter machine maintenance mode (on MFC210C all four photo/copy/fax/scan lights flash in maintenance mode). Care is needed in maintenance mode, otherwise critical settings may be inadvertently corrupted.

FAX models with numerical keypads: Press the Menu/Set, *, 2, 8, 6 and 4 keys within two seconds. (if you fail to complete the correct key sequence within two seconds, press the Stop key to try again).

Other (non-FAX) models: Press the Menu/Set and Black Start keys. Next press the up arrow key four times to enter the maintenance mode).

2) Press the 8 then 0 keys in the initial stage of the maintenance mode to call up the machine's log information list (function code 80).

3) Press the Black Start key several times to scroll through the log information list to reach the purge counter. The purge counter is the 25th item in the list.

4) Press the 2, 7, 8, and 3 keys in this order to reset the purge count to zero.

5) Press the Stop/Exit key to return to the initial stage of the maintenance mode.

6) Press the 9 key twice to return to the standby state.

SOURCE: I've installed a new drum AND a new toner

Try this....
1: Turn off power and remove toner/drum
2: Tape the little spring loaded lever just inside the printer on the upper left hand side in the *DOWN* position! Do not replace drum yet and...
3: Turn power on to printer and let it cycle. Status/Toner lights will come on as usual.
4: Turn off printer, remove tape from lever, replace drum and turn back on.