Brother International HL-1660E Service Manual - Page 84
Black vertical streaks or Blurred vertical line, Fixing unit, damaged, Black and thin horizontal
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I-7 Black vertical streaks or Blurred vertical line I-8 Possible cause Step Check Result Remedy EP-ED cartridge 1 Fixing unit damaged During a printing, open the toner cartridge lid in the printer and pull out the EP-ED cartridge. Open the drum shutter of the EP-ED cartridge and check the toner image on the drum. Are there vertical stripes on the drum? Yes Replace the EP-ED cartridge. No Replace the fixing unit. I-9 Black and thin horizontal streaks Possible cause Step Beam detection 1 error Check - Result Remedy Replace the scanner unit or - the harness and, if the problem is not resolved, replace the main PCB assy. I-10 Black and blurred horizontal stripes Possible cause Step Check Drum or charging 1 roller failure Do stripes appears at 95 mm or 38 mm interval? Fixing unit failure 2 Do stripes appears at 80 mm interval? Result Remedy Yes Replace the EP-ED cartridge. Yes Replace the fixing unit. VI - 8