Symptom Tables; Printer Symptom Table; Print Quality Symptom Table - Lexmark X734de Service Manual

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Symptom tables

Printer symptom table

Symptom
Dead printer
Operator panel—one or more buttons do
not work.
Operator panel—display is blank. Printer
sounds five beeps.
Operator panel—display is blank.
Operator panel continuously displays all
diamonds and does not complete POST.
Close Front Door does not appear when
door is open
Front door locks and will not open.

Print quality symptom table

Symptom
Background
Blank page
Blurred or fuzzy print
Half-color page
Horizontal banding
Horizontal line
Insufficient fusing
Missing image at edge
Mottle (2–5mm speckles)
Narrow vertical line
Random marks
Residual image
Solid color page
Vertical banding
Small font text looks fuzzy around the
edges
2-6
Service Manual
Action
Go to "Dead printer service check" on page
Go to "One or more operator panel buttons fail" on
page 2-145.
Go to "Operator panel display blank, five beeps, and LED is
off" on page 2-146.
Go to "Operator panel display blank, five beeps, and LED is
off" on page 2-146.
Go to "Operator panel display blank, five beeps, and LED is
off" on page 2-146.
Go to "920.26—POST service check" on page
Go to "Front cover locked in place" on page
Action
Go to "Print quality—background" on page
Go to "Print quality—blank page" on page
Go to "Print quality—blurred or fuzzy print" on page
Go to "Print quality—half-color page" on page
Go to "Print quality—horizontal banding" on page
Go to "Print quality—horizontal line" on page
Go to "Print quality—insufficient fusing" on page
Go to "Print quality—missing image at edge" on page
Go to "Print quality—mottle (2–5mm speckles)" on
page 2-151.
Go to "Print quality—narrow vertical line" on page
Go to "Print quality—random marks" on page
Go to "Print quality—residual image" on page
Go to "Print quality—solid color page" on page
Go to "Print quality—vertical banding" on page
Check the flatbed air filter. If noticable dirt or particles are on the
filter, replace the filter. See
page 4-231.
2-140.
2-125.
3-49.
2-148.
2-149.
2-150.
2-151.
2-151.
2-151.
2-152.
2-152.
2-153.
"Flatbed air filter removal" on
2-150.
2-150.
2-151.
2-151.