Lexmark C770 Service Manual - Page 140
Vertical lines or streaks, Reseat the ITU.
View all Lexmark C770 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 140 highlights
5061 Vertical lines or streaks Step 1 2 Actions and questions Are the vertical lines or streaks visible outside the printed image? Are the vertical streaks in a single color? Yes Go to step 2 Go to step 3 3 Vertical streaks in a single color, which are visible outside the printed area are most likely caused by a cleaner problem in the print cartridge. Are streaks magenta, cyan, or yellow? Replace the cartridge. No Replace the cartridge. Replace the ITU assembly. See "ITU assembly removal" on page 4-49. Replace in order: • Black print cartridge • ITU assembly. See "ITU assembly removal" on page 4-49. Horizontal lines or streaks If the horizontal marks or lines repeat at evenly-spaced intervals, use the "Print quality defect locator chart" on page 3-3 to determine the part to be replaced. For lines or marks appearing at random intervals, go to step 1. Step Actions and questions 1 Does the printer display an 83 ITU Maintenance message? 2 Are the horizontal marks or lines in a single color? 3 Print cartridge(s)-Enter the Diagnostics mode. Remove one print cartridge at a time, and run a Test Page to isolate the faulty print cartridge. Have you isolated the failing print cartridge? 4 Reseat the ITU. Do the marks/lines persist? Yes Recommend the customer order the ITU maintenance kit. See "Scheduled maintenance" on page 6-1. Replace the cartridge. Replace the "Cartridge contact assembly removal for the failing color on page 4-35. Replace the "ITU assembly removal" on page 4-49. No Go to step 2 Go to step 3 Go to step 4 Problem resolved 2-98 Service Manual