Paper Pick Motor Drive Assembly Service Check; Print Quality Service Check - Lexmark C540n Service Manual

5025-2xx, 4xx

Paper pick motor drive assembly service check

Note: The input (S2) sensor is part of the paper pick motor drive assembly, and is not available separately.
Step Questions / actions
Turn the printer off, and then remove the rear
1
shield. See
"Top cover assembly removal"
4-13. Check the cable at JSP1 on the
on page
controller board for proper connection.
Is the cable properly connected?
Did the printer function correctly after
2
reconnecting the cables?
Turn the printer on, and then verify the
3
following approximate values at JSP1:
Pin Value
+24 V dc
2
+24 V dc
4
+5V (when paper is picked)
5
Ground
7
Ground
8
+5 V dc
10
_5 V dc (when paper is picked)
12
+5 V dc
15
Ground
16
Are the values approximately correct?

Print quality service check

Note: This symptom may require replacement of one or more CRUs (Customer Replaceable Units) designated
as supplies or maintenance items, which are the responsibility of the customer. With the customer's permission,
you may need to install a developer (toner) cartridge or photoconductor unit.
Service tip
Before troubleshooting any print quality problems, do the following:
Print a menu settings page, and check the life status of all supplies. Any supplies that are low should be
1.
replaced.
To print a menu settings page:
Press Menu (
a.
Select Reports from the Admin Menu, and press Select (
b.
Select Menu Settings, and press Select (
c.
Note: Be sure and keep the original menu page to restore the customer's custom settings if needed.
2. On the menu page, make sure the following is set to the default level:
Color Correction: Set to Auto.
–
Print Resolution: Set to 600 dpi (print quality problems should be checked at different resolution
–
settings).
– Toner Darkness: Set to 4 (default).
Color Saver: Set to OFF.
–
Service Manual
2-42
JSP1
) on the operator panel.
Yes
Go to step 3.
Problem resolved.
Replace the paper pick
motor drive assembly. See
"Paper pick motor drive
assembly removal—
standard tray" on
page 4-65.
).
).
No
Properly connect the cables,
and POR the printer.
Go to step 2.
Go to step 3.
Replace the controller
board. See
"Controller
board removal" on
page 4-20.
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