Lexmark E 450 Dn Service Manual

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EP SETUP
EP Defaults
This setting is used to restore each printer setting listed in EP SETUP to its factory default value. Sometimes this 
is used to help correct print quality problems.
To restore EP Defaults:
1.Select EP Defaults from EP SETUP.
2.Select Restore to reset the values to the factory settings, and select Do Not Restore to exit without 
changing the settings.
Fuser Temperature (Fuser Temp)
This adjustment can be used to help solve some customer problems with paper curl on low grade papers and 
problems with letterheads on some types of media. 
The fuser temperature can be adjusted to: Normal, Lower, Lowest. The default is Normal.
Transfer
The transfer can be adjusted to Low, Medium, or High. The default setting is Medium.
Print Contrast
The print contrast setting controls the developer voltage offset.
The print contrast can be adjusted to Low, Medium, or High. The default setting is Medium.
Charge Roll
The charge roll can be adjusted to Low, Medium, or High. The default setting is Medium.
Gap Adjust
The setting adjusts the minimum gap between sheets. Increasing this value may reduce curl of some printed 
media and eliminate some output bin stacking problems. However, increasing this value also results in slower 
overall performance, measured in pages per minute. The range of values is 0 to 255, and the default value is 0. 
						

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EVENT LOG
Display Log
The event log provides a history of printer errors. It contains the 12 most recent errors that have occurred on the 
printer. The most recent error displays in position 1, and the oldest error displays in position 12 (if 12 errors have 
occurred). If an error occurs after the log is full, the oldest error is discarded. Identical errors in consecutive 
positions in the log are entered, so there may be repetitions. All 2xx and 9xx error messages are stored in the 
event log.
To view the event log:
1.Select Display Log from EVENT LOG. 
Up to three error codes display at a time. Press   or   to view additional error codes. 
2.Press Back () to return to the EVENT LOG menu.
Print Log
Additional diagnostic information is available when you print the event log from DIAGNOSTICS rather than 
CONFIG MENU. 
The Event Log printed from DIAGNOSTICS includes:
•Detailed printer information, including code versions
•Time and date stamps
•Page counts for most errors
•Additional debug information in some cases
The printed event log can be faxed to Lexmark or your next level of support for verification or diagnosis. 
						

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To print the event log:
Select Print Log from EVENT LOG.
Press Back (
) to return to EVENT LOG. 
Clear Log
Use Clear Log to remove the current information in the Event Log. This affects both the viewed log and the 
printed log information.
1.Select Clear Log from the Event Log menu.
2.Select YES to clear the Event Log or NO to exit the Clear Log menu. If YES is selected, Deleting EVENT 
LOG displays on the screen.
Press Back (
) to return to EVENT LOG.
EXIT DIAGNOSTICS
This selection exits Diagnostics mode, and Resetting the Printer displays. The printer performs a POR, 
and the printer returns to normal mode. 
						

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Configuration menu (CONFIG MENU)
Entering Configuration Menu
1.Turn off the printer.
2.Press and hold   and  .
3.Turn on the printer.
4.Release the buttons when Performing Self Test displays.
The message CONFIG MENU displays on the top line of the operator panel.
Available menus
Some menus are not available, depending on the configuration of the printer. Maint Cnt Value See “Maintenance page count (Maint Cnt Value)” on page 3-27
Reset Maint Cnt See “Maintenance page counter reset (Reset Maint Cnt)” on 
page 3-27
Reset PC Cnt
Prt Quality Pgs See “Print quality pages (Prt Quality Pgs)” on page 3-27
Panel Menus See “Panel Menus” on page 3-27
PPDS Emulation See “” on page 3-27
Demo Mode See “Demo Mode” on page 3-28
Factory Defaults See “Factory Defaults” on page 3-28
Energy Conserve See “Energy Conserve” on page 3-28
EVENT LOG (print log only) See “EVENT LOG” on page 3-28
Paper Prompts See “Paper Prompts” on page 3-28
Env Prompts See “Env Prompts” on page 3-28
Change Prompts See “Change Prompts” on page 3-29
Reduce Curl See “Reduced Curl” on page 3-29
USB Speed See “USB Speed” on page 3-29
Exit Config Menu See “Exit Config Menu” on page 3-29 
						

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Maintenance page count (Maint Cnt Value)
The current value for the maintenance page counter is displayed. This counter tracks printer usage. A print job 
containing a single page increments the counter by one and a duplex page by two. At 300,000, the customer is 
reminded that the printer requires scheduled maintenance. This counter is reset by the servicer after a 80 
Scheduled Maintenance message displays and a maintenance kit is installed. See “Maintenance kits” on 
page 6-1 for the part number.
To view the maintenance page count:
1.Select Maint Cnt Value from CONFIG MENU. 
2.Press   to view the value.
Press Back (
) to return to the main Configuration menu.
Maintenance page counter reset (Reset Maint Cnt)
After scheduled maintenance, the servicer needs to reset the page counter.
To reset the maintenance page count to zero:
Select Reset Maintenance Count from the Configuration menu. 
The message Reset Maint Cnt=Reset displays momentarily. When the reset operation is complete, the 
menu returns to the Printer Setup Reset Maintenance Count screen.
Print quality pages (Prt Quality Pgs)
The print quality test pages can be printed from either the Diagnostics mode or Configuration Menu (CONFIG 
MENU). When printed from the Diagnostic mode, additional information is included, and the print cartridge 
lockout is bypassed. See “Print quality pages (Prt Quality Pgs)” on page 3-13. Additional configuration 
information may be included on the print quality pages which is not included on the print menu page.
To print the Print Quality Test Pages, select Prt Quality Pgs from CONFIG MENU. The message Printing 
Quality Test Pages is displayed.
The following is printed:
•Settings from EP SETUP from DIAGNOSTICS: 
Fuser temperature, warm up time, transfer, print contrast, and charge roll settings. 
•Contents of the EVENT LOG from DIAGNOSTICS. 
•Printer configuration information:
Printer serial number, controller code level, engine code level, operator panel code level, smart option code 
levels, font versions, and so on. 
Values for the QUALITY MENU settings used to print the pages.
The print quality test consists of four pages. Page one contains a mixture of graphics and text. Pages two and 
three only contain graphics. Page four is blank. If duplex is turned on, the pages are duplexed. The Print Quality 
Test pages are printed in English and must always be printed on letter, legal, or A4 paper.
Panel Menus
Settings are Disable and Enable. The default is Enable. 
						

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PPDS Emulation
This menu item allows the user to enable or disable PPDS emulation data stream. When this setting is enabled, 
the following settings are also changed:
•SmartSwitch settings for each port are turned off.
•The printer language is changed to PPDS Emulation.
Users can still switch languages on the operator panel and through the PJL data stream.
Demo Mode
There is a built-in demonstration mode. The settings allow you to Deactivate to turn off the demo mode and 
Activate to turn it on. While Demo Mode is set, the printer will start in Demo Mode until you change the setting.
Note:  While Demo Mode is set to Activate, only demonstration files can print, and files received across 
the network or from the host computer are ignored.
Factory Defaults
This setting enables a user to restore all the printer settings to the original factory settings. Selections are 
Restore Base and Restore Network. Network does not appear unless you have a network printer. The 
following settings are not changed:
•Display language
•Settings in the NETWORK/PORTS MENU group.
Energy Conserve
This menu controls what values appear on the Power Saver menu. If Off is selected in Energy Conserve menu, 
then Disabled appears in the Power Saver menu and Power Saver can be turned off. If On is set in Energy 
Conserve, the Power Saver feature cannot be disabled.
EVENT LOG
The event log provides a history of printer errors. The event log can only be printed in CONFIG MENU. 
Additional options are available in DIAGNOSTICS. See “EVENT LOG” on page 3-24. 
To print the event log:
1.Select Print Log from EVENT LOG.
2.Press Back () or Stop () to return to EVENT LOG. 
Note:  An event log printed from the CONFIG MENU will not contain debug information or secondary codes for 
900 service errors. However, the event log printed from DIAGNOSTICS mode does include this information.
Paper Prompts
When a tray is out of the indicated paper size, a prompt is sent to the user to load paper in a tray. This setting 
controls the tray the user is directed to fill. Selections are Auto (default), MP Feeder, and Manual Paper. 
Env Prompts
This setting controls the tray the user is directed to refill when a specific envelope size is out. The selections are 
Auto (default), MP Feeder, and Manual Env.  
						

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Change Prompts
The value of this setting determines if the device displays any of the Change prompts.
Reduced Curl
This setting will cause the engine throughput to be significantly reduced if it is enabled. This mode will only be 
used if the media being printed is “Paper.” This setting is available as a last resort to help improve paper curl 
problems.
USB Speed
A value of “Full” forces the USB port to run at full sped and also disables its high-speed capabilities.
Exit Config Menu
Press   to exit the CONFIG MENU. The message Resetting the Printer displays, and the printer 
performs a POR and restarts in normal mode. 
						

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4.  Repair information
Warning:  Read the following before handling electronic parts.
Handling ESD-sensitive parts 
Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent 
damage to ESD-sensitive parts, follow the instructions below in addition to all the usual precautions, such as 
turning off power before removing logic cards:
•Keep the ESD-sensitive part in its original shipping container (a special “ESD bag”) until the 
part is ready to be installed into the printer.
•Make the least-possible body movements to prevent an increase of static electricity from 
clothing fibers, carpets, and furniture.
•Put the ESD wrist strap on your wrist. Connect the wrist band to the system ground point. This 
discharges any static electricity in your body to the printer.
•Hold the ESD-sensitive part by its edge connector shroud (cover); do not touch its pins. If a 
pluggable module is being removed, use the correct tool.
•Do not place the ESD-sensitive part on the MFP cover or on a metal table; if the ESD-
sensitive part needs to be put down for any reason, first put it into its special bag.
•Machine covers and metal tables are electrical grounds. They increase the risk of damage 
because they make a discharge path from your body through the ESD-sensitive part. (Large 
metal objects can be discharge paths without being grounded.)
•Prevent ESD-sensitive parts from being accidentally touched by other personnel. Install 
machine covers when the machine is not being worked on, and do not put unprotected ESD-
sensitive parts on a table.
•If possible, keep all ESD-sensitive parts in a grounded metal cabinet (case).
•Be extra careful in working with ESD-sensitive parts when cold-weather heating is used, 
because low humidity increases static electricity.
Removal procedures
Note:  
1.Remove the toner cartridge and media tray before removing other printer parts. The toner cartridge should 
be protected from light while out of the printer. 
2.We recommend disconnecting all external cables from the printer to prevent damage during service. 
3.Unless otherwise stated, reinstall the parts in reverse order of removal. 
4.When reinstalling a part held with several screws, start all screws before final tightening.  
						

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Front access cover removal 
1.
Remove Tray 1.
2.Open the front access cover.
3.Open the rear door and the right side cover.
4.Loosen the four screws, and remove the controller card cover.
5.Disconnect the operator panel cable (A) from J3 on the controller card. 
6.Extract the cable, and unhook the access cover by pressing the right hinge to the right until it can be lifted 
up and away from its pivot. Relax the hinge above the pivot.
7.In the same manner, move the left hinge from its pivot point.