Symptom Tables; Printer Symptoms - Lexmark X642e Service Manual

7002-xxx

Symptom tables

Printer symptoms

Symptom
Dead machine
Touchscreen panel blank, LED is on
Touchscreen all white
Touchscreen panel blank, LED off, operator
panel buttons do not work
LCD touchscreen icon buttons do not work
LCD touchscreen (mono—model X642e)—
contrast does not change with contrast
control
LCD touchscreen (color—models X644e/
X646e)—unable to change LCD
touchscreen backlight
LCD (mono—model X642e)—Home and
Help buttons on operator panel do not
operate.
LCD (mono—model X642e)—Menu button
on operator panel does not operate.
Operator panel—none of the buttons work.
Operator panel—one button does not work
Operator panel LED does not come on
while MFP operates normally
Paper feed problems—printer or integrated
500-sheet paper tray
Paper jams at exit of redrive assembly—
duplex option not installed.
Paper jams at exit of redrive assembly—
duplex option installed.
Fuser solenoid fails to operate.
Printer—black page (print quality)
Printer—blank page (print quality)
Printer—light print (print quality)
Printer—background (print quality)
Printer—residual image (print quality)
Printer—skew (print quality)
Printer—banding (print quality)
Printer—random marks (print quality)
Printer—toner on backside of printed page.
(print quality)
2-10
Service Manual
Action
Go to "Dead machine service check" on page
Go to "LCD touchscreen display service check—models
X644e/X646e" on page 2-149.
Go to "LCD touchscreen display service check—models
X644e/X646e" on page 2-149
Go to "Operator panel right cover assembly service check"
on page 2-154.
Go to "LCD touchscreen display service check—models
X644e/X646e" on page 2-149.
Go to "LCD touchscreen contrast control service check—
model X642e" on page 2-149.
Go to "LCD touchscreen backlight—models X644e/X646e"
on page 2-151
Go to "Operator panel Help and Home buttons service
check—model X642e" on page
Go to "Operator panel Menu button service check—model
X642e" on page 2-154.
Replace the operator panel right cover assembly. See
"Operator panel right cover assembly removal" on
page 4-64.
Replace the operator panel right cover assembly. See
"Operator panel right cover assembly removal" on
page 4-64.
Go to "Operator panel right cover assembly service check"
on page 2-154.
Go to "Paper feed service check—printer" on page
Go to "Paper feed service check—printer" on page
Go to "Duplex option service check" on page
Go to "Fuser solenoid service check" on page
Go to "Print quality—all black page" on page
Go to "Print quality—blank page" on page
Go to "Print quality—light print" on page
Go to "Print quality—background" on page
Go to "Print quality—residual image" on page
Go to "Paper feed service check—printer" on page
Go to "Print quality—banding" on page
Go to "Print quality—random marks" on page
Go to "Print quality—toner on backside of printed page" on
page 2-164.
2-125.
2-154.
2-156.
2-156.
2-127.
2-140.
2-160.
2-161.
2-164.
2-162.
2-163.
2-156.
2-163.
2-161.