Brother International DCP-1400 Service Manual - Page 161

Trouble (5) Black and blurred vertical stripes or band L u2ip II P (6) Black vertical streaks on gray background Action to be taken At the scanner Check the following components: A - CCD unit t the printer side • Clean the paper path which may be contaminated with toner. • Slide the wire cleaner to clean the corona wire inside the drum unit. • Make sure that the wire cleaner is returned to its home position. • Replace the toner cartridge. • Replace the drum unit. • Replace the heat-fixing unit. At the printer side • Clean the laser beam window (glass) on the laser unit. • Replace the laser unit. (7) Black and blurred horizontal stripes -I, 14104-e-IAA NetipSot "' 61'%0'44° (8) Horizontal lines - At the printer side • Slide the wire cleaner to clean the corona wire inside the drum unit. • If the horizontal stripes appear at 39-mm intervals, replace the toner cartridge. • If they appear at 94-mm intervals, replace the drum unit. • If they appear at 79-mm intervals, replace the heat-fixing unit. • Clean the grounding contacts. (Contacts T in the illustration given on page VI-28.) • Replace the high-voltage power supply PCB. At the printer side • Check the connection between the right end of the paper feed roller and the grounding wire. (Contact ® in the illustration given on page VI-29.) VI - 23