Brother International HL-2400C Service Manual - Page 291

I-6 White Line (1) Phenomenon Vertical white line appears in the specific color area when test-printed in the four color mode (Stripe Mode), as shown in print sample (6) of Fig.8-2. Main Causes 1) Foreign particles adhering to the following places around the developer roller. (Refer to Fig.8-8.) • Between the cartridge cover and developer roller (a) • On the surface of the developer roller (b) • Between the blade fixing plate and the developer roller (c) • Between the blade and the developer roller (d) 2) Foreign particles adhering to the toner cartridge's main blade of the color in question. Developer roller (a) (b) (c) (d) Blade fixing plate Developer blade Fig.8-4 Countermeasures 1) Implement the test print. 2) Confirm the color of the toner cartridge in question that has caused the white line. 3) Remove the foreign particles adhering to the developer roller. If foreign particles adhere to (d) of Fig.8-8, remove them referring to one of the figures below. Approx. 1 cm Fig.8-5 Piece of OHP sheet VIII-46 Fig.8-6 Developer roller