Lexmark T642 Service Manual - Page 421

Print defects guide Print defects guide Page 1 of 1 Match a set of repeating defects on a print job to the marks on one of the vertical lines. The line that best matches the defects on the print job indicates which particular part may be causing the defect. For example, the distance between these two marks represents a repeating defect that occurs every 28.3 mm (1.11 in.), which means the charge rollers may need to be replaced. Note: If the defect appears on the printed side of a single-sided print job, replace the toner cartridge before replacing the fuser. Replace the toner cartridge 47.8 mm (1.88 in.) 96.8 mm (3.81 in.) Replace the fuser 88.0 mm (3.46 in.) 95.2 mm (3.75 in.) Replace the charge rollers 28.3 mm (1.11 in.) Replace the transfer roller 51.7 mm (2.04 in.)