Brother International DCP 8040 Service Manual - Page 255

CHAPTER 6 TROUBLESHOOTING I-23 Ghost User Check (1) Check the paper used meets the recommended paper specifications. Damp paper, thick media or rough surfaced paper can cause the problem. (2) Check the machine's environment. High temperature and high humidity conditions can cause the problem. (3) Check that the appropriate media type is selected in the printer driver. (4) Try installing a new drum unit. Possible cause Driver setting Step 1 Check Is thin paper such as 64g/m2 used under the thick paper mode? Drum unit failure 2 Is the problem solved after replacing the drum unit? High-voltage power supply PCB failure 3 Is the problem solved after replacing the high-voltage power supply PCB? Result Yes Yes Remedy 1) Change the current mode to the normal mode from the driver setting. 2) Print 5 or 6 blank pages if this problem occurs. Replace the drum unit. Yes Replace the high-voltage power supply PCB. I-24 Toner specks User Check (1) Check the paper used meets the recommended paper specifications. A rough surfaced paper may cause the problem. (2) The toner cartridge may be damaged. Install a new toner cartridge. (3) The drum unit may be damaged, or may be nearly at the end of life. Install a new drum unit. 6-52