Lexmark E 450 Dn Service Manual

General information1-5
4512-630
Connectivity and compatibility
Item4512-630
Lexmark E450dn
Data stream emulations
PCL 6✔
PostScript Level III✔
Host Based Printing (HBP)/GDI Version 1 n/a
Host Based Printing (HBP)/GDI Version 2✔
PPDS✔
HTMLn/a
PDF (version 1.5)✔
Compatibility Windows/Macintosh/Linux ¹
Standard local connections
Parallel (IEE 1284 bidirectional)✔
USB*✔
Standard network connections
Ethernet (10/100 Base TX) 
Optional local connections
External print server support✔
Option slots
Memory slots...

1-6Service Manual 4512-630
Types of print media
Ensure trays are properly loaded. Never mix media types within a tray. 
Source Sizes Types Weight
6Input capacity 
(sheets)²
Input tray 1
(250-sheet tray)A4, A5, A6³, JIS, B5, 
letter, legal, 
executive, folio, 
statementPaper, labels¹, 
transparencies60—90 g/m
2
(16—24 lb)250 paper
50 labels¹
50 transparencies
2nd Drawer option
(550-sheet only–
E352dn only)A4, letter, legal, A5, 
JIS, B5, executive, 
folio, statementPaper, labels¹, 
transparencies60—90...

General information1-7
4512-630
Tips on preventing jams 
Paper path
A Paper path A-B 117.8
B Manual feed sensor B-C 9.6
C Upper end feed rolls C-D 60.5
D Input sensor D-E 49.0
E Transfer roll E-F 110.7
F Fuser F-G 26.9
G Fuser exit rolls G-H 6.2
H Fuser exit sensor H-I 127.2
I Exit rolls I-J 26.4
J Exit sensor I-K 217.4
K Duplex unit K-L 102.5
L Duplex sensor L-M 16.2
M Auto compensator M-B 178.9
*Measurements are approximate paper lengths (millimeters)
**Sensors are measured at rotation/position which...

1-8Service Manual 4512-630
Most paper jams can be avoided by correctly loading paper and specialty media in the printer.
The following hints can help prevent paper jams:
• Do not load wrinkled, creased, or damp media.
• Never mix media types within a tray.
• Flex, fan, and straighten the media stack before loading it.
Note:Make sure the media stack is below the maximum media fill indicators on the 250-sheet tray before 
pushing the tray into the printer.
• Push all trays snugly into the printer after...

General information1-9
4512-630
Acronyms
ACM Autocompensator Mechanism (or paper feed)
ASIC Application Specific Integrated Circuit
CBM Complete Bill Of Material
CRC Cyclic Redundancy Check
DIMM Dual In-Line Memory Module
EEPROM Erasable Electrically Programmable Read-Only 
Memory
ENA External Network Adapter
FRU Field Replaceable Unit
HBP Host Based Printing 
HVPS High Voltage Power Supply
LCD Liquid Crystal Diode
LED Light Emitting Diode
LSU Laser Scanning Unit
LVPS Low Voltage Power Supply
NVRAM...

1-10Service Manual 4512-630 

Diagnostics information2-1
4512-630
2.  Diagnostics information
Start
CAUTION: Unplug power from the printer before connecting or disconnecting any cable, 
assembly, or electronic card. This is a precaution for personal safety and to prevent damage to the 
printer. 
Use the service error code, user status message, user error message, symptom table, service checks, and 
diagnostic aids in this chapter to determine the corrective action necessary to repair a malfunctioning printer. 
They will lead you to...

2-2Service Manual 4512-630
Overview of the operator panel and menus
The operator panel on your printer is a 4-line, back-lit, grayscale display that can show both graphics and text. 
The Back, Menu, and Stop buttons are located to the left of the display, the navigation buttons are located 
below the display, and the numeric pad is located to the right of the display.
The use of the buttons and the layout of the display panel are described in the following table.
Operator panel
Button Function
Back Press...

Diagnostics information2-3
4512-630
Navigation buttonsThe Up or Down buttons are used to move up and down lists.
When navigating through a list using the Up or Down button, the cursor 
moves one line at a time. Pressing the Down button at the bottom of the 
screen changes the screen to the next whole page.
The Left or Right buttons are used to move within a screen such as 
moving from one menu index item to another. They are also used to 
scroll through text that will not fit on the screen.
The Select...

2-4Service Manual 4512-630
Diagram of the printer menus
The diagram shows the menu index on the operator panel and the menus and items available under each menu. 
Not all menus or selections will be available in all situations. These are accessed through the driver.
Paper Menu
Paper Source
Paper Size
Paper Type
Custom Types
Universal Setup
Substitute Size
Paper Texture
Paper Weight
Paper Loading
PostScript Menu
Print PS Error
Font Priority
USB Menu
Standard USB Finishing Menu
Duplex
Duplex Bind
Copies...