I keep getting error 50 or error 51 and the screen says unable to print. I have followed the instructions of customer service and cleaned the coding band and checked for paper specs to no avail. I follow the whole procedure all the pay to "print" and the error message pops up on the screen. .....can't even turn it off. A message comes up that says the "Line is busy, even though we have never used it as a fax; only a copier. H E L P !!!

go here:


http://www.brother-usa.com/FAQs/Solution.aspx?FAQID=200000025049&Sympt=%0aHow+do+I+clear+the+message+Unable+to+Clean+(followed+by+a+two+digit+code)+from+the+display%3f&Model=1377&ProductGroup=5&Keyword=unable%20to%20clean%2050&ProductID=MFC495CW#.UDaDOLOe7-I

and follow the instructions for error code that is 'not 46'

see if that works....

This is not just a density sensor, this is a plastic cover over it that is getting stuck. There is a piece of soft rubber attached to the solenoid that is getting very sticky over time. Removing this rubber and stretching solenoid return spring corrects the issue. Search web for the service manual and follow chapter 8 to disassemble the printer correctly - takes less than 10 minutes to do it

Do you mean unable to clean?If it's that follow this:
Unplug the printer from power cord.Press and hold the "menu" button, then plug the device.You'll see on the LCD screen a "machine error" code.If this code is 40,41,49 or 4F the print head is defective.If the error is 48 - defective print head cable or circuit board.If the error is 50 or 51 there is error in Purge unit and printer require service.If the error is 46 the waste ink tank is full.Follow this:
Enter 80, then scroll down with the arrow down (round) key. You'll find an entry listed as purge count. If number is over 6000, enter 2 7 8 3.This will reset the purge count value. Then restart the printer, hopefully without the annoying cannot clean message.

Do you mean "unable to clean"?If it this follow this instruction.
Unplug the printer from power cord.Press and hold the "menu" button, then plug the device.You'll see on the LCD screen a "machine error" code.If this code is 40,41 or 4F the print head is defective.If the error is 50 or 51 there is error in Purge unit and printer require service.If the error is 46 the waste ink tank is full.Follow this:Enter 80, then scroll down with the arrow down (round) key. You'll find an entry listed as purge count. If numberis over 6000, enter 2 7 8 3.This will reset the purge count value. Then restart the printer, hopefully without the annoying cannot clean message.

Unplug the printer from power cord.Press and hold the "menu" button, then plug the device.You'll see on the LCD screen a "machine error" code.If this code is 40,41 or 4F the print head is defective.If the error is 50 or 51 there is error in Purge unit and printer require service.If the error is 46 the waste ink tank is full.Follow this:
Enter 80, then scroll down with the arrow down (round) key. You'll find an entry listed as purge count. If number is over 6000, enter 2 7 8 3.
This will reset the purge count value. Then restart the printer, hopefully without the annoying cannot clean message.

Unplug the printer from power cord.Press and hold the "menu" button, then plug the device.You'll see on the
LCD screen a "machine error" code.If this code is 40,41 or 4F the print head is defective.If the error is 50 or
51 there is error in Purge unit and printer require service.If the error is 46 the waste ink tank is full.Follow this:
Enter 80, then scroll down with the arrow down (round) key. You'll find an entry listed as purge count. If number
is over 6000, enter 2 7 8 3.This will reset the purge count value. Then restart the printer, hopefully without the
annoying cannot clean message.

Unplug the printer from power cord.Press and hold the "menu" button, then plug the device.You'll see on the LCD screen a "machine error" code.If this code is 40,41 or 4F the print head is defective.If the
error is 50 or 51 there is error in Purge unit and your printer need service.If error is 46 the waste ink tank is full.Follow this:
1. Pres 'menu', 'mono start' then'menu' one by one...
2. Press the arrow up or down to go to'maintenance 80'.
3. Press 'mono start' several times to go to'Purge'. Finding the PURGE will show some numeric value
which is Iassume the number of times the printer had cleaned.
4. Press'arrow up' key and scroll for number "2" then press "set".Do the same for numbers 7, 8 and 3.
After you have entered thiscombination, the purge numeric value will be reseted to 00000.

More than likely you have a bad printhead, if its under warranty brother will pay to have it fixed, otherwise just play baseball with it and buy another one

On most printers that are manufactured today have an error chip built onto the motherboard of the printer. If your printer experiences an error. It will register it on on the chip. You will continue getting the error because it needs to be cancelled. To cancel this error follow the instructions below:
1) Turn print on
2) Unplug the printer from the power
3) Wait at least 70 seconds
4) Plug it back in
The error should be cancelled

From Brother's website:
Print Unable ##:
Turn off the printer. Wait a few seconds, then turn it on again. If this does not clear the
problem, call your dealer or a Brother Customer Service.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe Diaz



I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

How to repair error "print unable 4F" in the Brother dcp-135c .
thank alot.