The paper misfeed message "(B)" appears when a paper misfeed occurs in the internal paper feed path.
The inside of this printer becomes very hot. Before removing paper around the fusing unit, wait until the temperature of the covers inside the fusing unit and paper transfer unit cools down.
Push the button on the right side of the printer, and then open the front cover with both hands carefully.
Hold the print cartridge's front handle to lift and pull it out.
Pull out the jammed paper carefully.
If you cannot see the jammed paper or remove it, lift "B" and remove the jammed paper.
Hold the handle of the print cartridge, and then insert it into the printer until it stops.
Close the front cover with both hands carefully.
When closing the front cover, push the upper side of the cover firmly. After closing the cover, check that the paper jam is cleared.