Symptom Tables; Multiple Function Printer (Mfp) Symptom Table; Print Quality Symptom Table - Lexmark X734de Service Manual

7526

Symptom tables

Multiple function printer (MFP) symptom table

Symptom
Close Front Door does not
appear when door is open
Dead printer
Front door locks and will not
open.
Operator panel—one or
more buttons do not work.
Operator panel—does not
respond to touch
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.
Paper pick assembly—arm
hangs down, and tray
cannot be opened
Scanner lid does not close
completely, will not stay
open, or makes noise when
opening and closing.
Top access cover does 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
Service Manual
2-6
Action
Go to
"920.26—POST service check" on page
Go to
"Dead printer service check" on page
Go to
"Front cover locked in place" on page
Go to
"One or more operator panel buttons fail" on page
Check display connection. See the installation note on
Go to
"Operator panel display blank, five beeps, and LED is off" on
page 2-150.
Go to
"Operator panel display blank, five beeps, and LED is off" on
page 2-150.
Go to
"Operator panel display blank, five beeps, and LED is off" on
page 2-150.
Order PN 40X6319, and replace the broken plastic spring hook.
Go to
"ADF hinge (left and right) removal" on page
The top access cover spring or springs may be broken. Go to
4-179. Replace the top access cover spring(s).
won't open" 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 2-155.
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
2-127.
2-144.
3-49.
2-149.
page 4-29.
4-256.
"If the cover
2-152.
2-153.
2-154.
2-154.
2-154.
2-155.
2-155.
2-155.
2-155.
2-155.
2-156.
2-156.
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