Symptom Tables; Symptom Table-Base Printer - Lexmark C78x Service Manual

Symptom tables

Symptom table—base printer
Symptom
Fuser fan fails to run or is noisy
RIP fan fails to run or is noisy
VTB fan fails to run or is noisy
Excessive fuser drive motor assembly noise
Machine inoperative: Fans don't turn, engine not on,
lights not on, and none of the printer functions work.
Close Door displays constantly, unable to clear the
message, POR incomplete
Printer does not complete POST and stapler cycles
several times.
Operator panel: One or more buttons do not work
Operator panel: Display is blank, printer does not
sound 5 beeps, but printer is not inoperative
Operator Panel: Operator panel displays dots
continuously, sounds 3 beeps, and POST is
18incomplete.
Operator panel: One pixel or random pixels are
missing
Paper feed problems, base printer
Paper feed problems, integrated tray
Paper feed problems, integrated tray catching
autocompensator while removing the tray.
Action
Go to "925.02 error code service check" on
page 2-56.
Go to "927.03 error code service check" on
page 2-57.
Go to "926.01 error code service check" on
page 2-56.
Go to "Excessive fuser drive motor assembly
noise" on page 2-89.
Go to "AC and DC power service check" on
page 2-76.
Go to "Close door/HVPS/printhead interlock
switch service check" on page
Go to "POST incomplete—stapler cycles several
times" on page 2-116
Go to "Operator panel LCD/status LED/buttons
service check" on page 2-90.
Replace the operator panel assembly. See
panel assembly removal" on page
Go to "Operator panel LCD/status LED/buttons
service check" on page 2-90.
Replace the operator panel assembly. See
panel assembly removal" on page
Go to "2xx paper jams" on page
Go to "Tray 1 service check" on page
The wear clip in the back left of the tray may not be
fully seated. Be sure to seat it fully so there is no gap
below it.
It could damage the autocompensator. If the problem
persists, go to "Tray 1 service check" on
page 2-117.
5061
2-81.
"Operator
4-68.
"Operator
4-68.
2-9.
2-117.
2-3
Diagnostic information