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...

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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...

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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...

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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...

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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...

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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...

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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...

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Repair information4-1
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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”)...

4-2Lexmark™ E450dn 4512-630  
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...