Banding; Background - Lexmark 4049LMO - Optra Lx+ B/W Laser Printer Service Manual

4049-XXX
Symptom
Regularly Spaced Marks
Skew, all edges
Skew, top and bottom only
Light Print
Blurred or Fuzzy Print
Residual Image
Honeycomb

Background

Horizontal Void or Streak
Vertical Void or Streak

Banding

Banding
Banding appears as light and dark horizontal lines on a page that is
supposed to be uniformly gray. It is due to variation in the speed of
the paper as it moves from roll to roll during development or transfer.
It is undetectable when printing text and is most noticeable on fine
dot or horizontal line patterns such as the second page of Print
Test 2 or Print Test 3. Inspect the gear train and the paper feed roll-
ers for wear, damage, dirt, or binds.
Background
Areas that are supposed to stay blank are getting small amounts of
toner deposited on them. Clean the erase lamps and the printhead
window.
Verify that all the erase lamps are working by powering on or off with
the top cover open. Verify that there is +24VDC on engine board
Go To
"Regularly Spaced Marks" on page
2-32.
"Skew, all edges" on page
"Skew, top and bottom only" on page
2-33.
"Light Print" on page
"Blurred or Fuzzy Print" on page
2-15.
"Residual Image" on page
"Honeycomb" on page
"Background" on page
"Horizontal Void or Streak" on page
2-20.
"Vertical Void or Streak" on page
2-34.
"Banding" on page
Diagnostic Information 2-12
2-33.
2-21.
2-32.
2-20.
2-12.
2-12.