This error message " Service Req E527 " means that the toner carousel housing the toner cartridges is obstructed, or is unable to rotate correctly. It can be caused by installing a toner cartridge incorrectly. Solution 1 : Check that the toner cartridge at the front of the printer is installed correctly. Solution 2 : Manualy remove all of the toner cartridges. Close all the covers, and then power the printer off. Open Cover B, and then remove the photoconductor unit (PCU). Turn the toner carousel by hand to line up a toner cartridge with the front of the printer. Open Cover A. If the toner cartridge is not in position to remove it, close Cover A and repeat the steps above. Remove the toner cartridge, and then close Cover A. Repeat all the steps above until you have removed all four toner cartridges. Reinstall the PCU. Close all the covers, and then power on the printer. Open Cover A and Cover B. Check thoroughly for any jammed paper, foreign objects or damage
Reset printers and cartridge. Printers problem solving,tips, tricks and tutorial.