Print error code 50 on a brother dcp-330c

Brother DCP-330C paper jam

replace the maintenance unit .

Very good article for what this error is and how to fix it here:
brother error code 46

check error code (46?)

Brother MFC-7340

I'm afraid there is no simple solution to this problem.
Error codes 50 and 51 refer to problems with the purging mechanism - some of the whirring and clicking noises you hear when the machine self cleans or starts up are it purging ink from the print head. Through some very clever mechanics, the machine uses the paper feed motor (running in the opposite direction to normal) to perform purging.
Possible causes listed in the Brother Service Manual for this error code range from "simple" things like a misaligned cam, to complex problems with the main control board. However, whatever it is, dismantling these machines isn't staright forward and parts are very diffciult to obtain and very, very expensive, so much so that 99 times out of a 100, it isn't cost effective to repair.
You could approach a Brother service agent, but it's highly probably that they will charge you more than buying an equivalent brand new machine.
Sorry.

Hi millih,

An error coded 4F means that there is a mechanical problem with the printer, usually, "unable to print means one of two things. Firstly an empty cartridge, secondly a full absorbing pad. I am guessing that the latter is not the priblem as the code would be #46, so if the ink cartridges are empty, get them replaced or refilled then disconnect the machine from the power for about 5 minutes, then reconnect and it should reset itself.

Sincerely
rover620

simple driver configuration problem linux is (the Cups printing system) is pretty universal just get your settings right or even cr even surrogate settings it should work

This COULD BE that there is some paper stuck in the dcp. Open cover and try to see if there is some paper left in the machine. I ve noticed, that -seeing from behind!- on the right side paperpieces are stuck and disturb the disk (foil) which give the printer info what to do. Open cover and try to look into the edges (seeing from the front: its the left side -where the modell name is printed) In some cases this means that the purgecamshaft is defective.