Lexmark C 540n, Service Manual

Page: 76 / 262

2-42
Service Manual
5025-2xx, 4xx
Print quality—blank page
Step Questions / actions Yes No
1 Is all the packing material for the imaging unit
in question removed? Go to step 2. Remove the packing
material.
2 Print a document that requires all four colors
with just a few characters to verify if one
specific color is a problem. For example, print
the Print Quality Test Pages:
1. Enter Diagnostic mode. (Turn the printer
off, press and hold Left ( ) and
Select ( ), turn the printer on, and then
release the buttons when the installed
memory and processor speed displays.)
2. Select PRINT TESTS , and press
Select ( ).
3. Select Prt Qual Pgs , and press
Select ( ).
Is only one color missing?
Replace the developer unit
for the missing color. Go to step 3.
3 Replace the imaging unit. See “Imaging unit
(IU) removal” on page 4-45 .
Does this fix the problem?
Problem resolved. Go to step 4.
4 Run the Motor Detect Test:
1. Remove the imaging unit and the waste
toner bottle. See “Imaging unit (IU)
removal” on page 4-45 .
2. Reinstall the right cover assembly.
3. Close the front cover.
4. Enter Diagnostics menu (Turn the printer
off, press and hold Left ( ) and Select
( ), turn the printer on, and release the
buttons when the installed memory and
processor speed displays.
5. Select MISC TESTS in the Diag Menu, and
press Select ( ).
6. Select Motor Detect , and press Select
( ).
Motor Detection In Progress…
appears.
The motor detection process takes about
10 seconds, and stops automatically.
Detect Complete. Rebooting…
appears,
and the printer performs a POR (Power On
Reset).
Did the motor run?
Go to step 5. Replace the Main drive gear
assembly. See
“Main drive
gear assembly removal”
on page 4-59
.