Lexmark X940e Owners Manual

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Duplex  

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Layout of media transport path
The main components associated with the media path and transport with the duplex installed.
Functions of main components
When the duplex is installed to the left of the printer, duplex (double-sided) printing is available with the printer.
The following outlines the functions of the main components of the duplex.
Switch (duplex left door interlock)
The switch (left door interlock) detects open/close of the left door.
Sensor...

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Duplex controller card assembly
The duplex controller card assembly that contains a CPU controls media feed in the duplex upon receiving a 
command from the upper printer engine card assembly and sensor/switch information.
Duplex drive motor
The duplex drive motor transmits driving force to the two duplex media transport roll assemblies and the duplex 
media center transport roll assembly middle that feeds media.
Inverter
reverse
clutchInverter
forward...

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Tools required for service
Flat-blade screwdriver
#1 Phillips screwdriver, magnetic
#2 Phillips screwdriver, magnetic
#2 Phillips screwdriver, magnetic short-blade
Needle nose pliers
Diagonal side cutters
Spring hook
Analog or digital multi meter
Parallel wrap plug 1319128
Twinax/serial debug cable (#1381963) 
Coax/serial debug cable (#1381964) 
5.5 mm hexdriver (magnetic)
Color toner vacuum
Fine incremental ruler 

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Acronyms
1TM 1 Tray Module
3TM 3 Tray Module
AC Alternating Current 
ADF Automatic Document Feeder
APS Automatic Paper Size
ASIC Application Specific Integrated Circuit
ATC Automatic Toner Control
CRU Customer Replaceable Unit
CSU    Customer Setup
CCW Counterclockwise
CW Clockwise
DC Direct Current 
DIMM Dual Inline Memory Module
DRAM  Dynamic Random Access Memory
EDO Enhanced Data Out
EP     Electrophotographic Process
EPROM Erasable Programmable...

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SRAM  Static Random Access Memory
TTM Tandem Tray Module
TVOC Total Volatile Organic Compound
UPR    Used Parts Return
VVolts 
V ac Volts alternating current
V dc Volts direct current 

Diagnostic information2-1
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2.  Diagnostic information
Start
Warning:When operating the driving units using the diagnostics or other tools, be sure to keep them covered 
unless otherwise specified.
Warning:When operating the driving units using the diagnostics or other tools, never touch the driving units. 
When operating the driving units using diagnostics or other tools, be sure to follow the procedures 
in this manual.
Warning:Servicers should wear a wrist band or the like to...

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Confirm the installation status
Be sure to check the following items before starting the troubleshooting procedures.
•With the power cord unplugged from the wall outlet, check that the cord is free from breakage, short-circuit, 
disconnected wire, or incorrect connection in the power cord.
•The printer is properly grounded. Check the power cord ground terminal.
•The printer is not installed at a place subjected to extreme temperature, extreme humidity or rapid...

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Control panel
Callout Control panel item Function
1LCD  A liquid crystal display (LCD) which shows home screen 
buttons, menus, menu items, and values. Allows for 
making selections within Copy, Fax, and so on.
2Indicator lightGives information about the status of the MFP using the 
colors red and green.
30–9
Note: Referred to as the numeric 
keypad.Press these buttons to enter numbers when the LCD 
screen has a field that accepts the entry of numbers....

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5Dial  Pause Press to cause a two- or three-second dial pause in a fax 
number. The button only functions within the Fax menu 
or with fax functions.
Press from the home screen to redial a fax number.
When outside of the Fax menu, fax function, or home 
screen, pressing Dial Pause causes an error beep.
When sending a fax, in the Fax To: field, a Dial Pause 
press is represented by a comma (,).
6Home t Press to return to home/start screen.
7Start Press to...