Lexmark X940e Owners Manual

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3.  Diagnostic aids
This chapter explains the tests and procedures to identify printer failures and to verify that repairs have 
corrected the problem.
Accessing service menus
Access the following menus to identify problems with the printer and run diagnostic tests.
Diagnostics Menu 1. Turn off the printer.
2. Press and hold the 3 and 6 
buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 
seconds.The Diagnostics Menu group consists of menus, 
settings, and operations that are used to diagnose 
various printer problems. 
Note: While the Diagnostics Menu Group is active, 
all host interfaces are offline.
See “Entering Diagnostics Menus” on page 3-2 
for more information. 
Configuration Menu 1. Turn off the printer.
2. Press and hold the 2 and 6 
buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 
seconds.The Configuration Menu group contains a set of 
menus, settings, and operations which are 
infrequently required by a user. Generally, the 
options made available in this menu group are 
used to configure a printer for operation. 
See “Entering Configuration Menu” on 
page 3-35 for more information.  
						

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Diagnostics Menus
Entering Diagnostics Menus
1. Turn off the printer.
2. Press and hold the 3 and 6 buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 seconds.
Available tests
Tests appear on the LCD in the order shown:
MOTOR TESTSSee “MOTOR TESTS” on page 3-6.
Finisher Motor Tests
Motor (entrance/paddle) 
Motor (buffer/transport) 
Motor (exit) 
Fin diverter solenoid
Sub paddle solenoid 
Media eject clutch 
Media eject clamp motor 
Media eject motor
Fin Buffer solenoid
Punch carriage shift motor
Punch unit motor 
Front tamper motor 
Rear tamper motor 
Stapler carriage motor 
Stapler unit motor 
Stacker bin lift motor 
Booklet end guide drive motor
Booklet paddle drive motor
Booklet front tamper motor
Booklet rear tamper motor 
Booklet folder/exit drive motor 
Booklet media entrance drive motor 
Booklet knife solenoid 
Booklet bin media transport motor 
Bridge unit diverter gate solenoid 
De-curler clutch 
Bridge unit transport drive motor 
Booklet diverter gate solenoid 
Booklet stapler motor 
						

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Bridge unit bin media exit solenoid
Printer Motor Tests
Transfer belt steering motor
CMY PC cartridge drive motor 
K PC cartridge drive motor
Printhead polygon mirror motor
Registration clutch 
Tray 1 media feed/lift motor
Tray 2 media feed/lift motor
Tray 3 media feed/lift motor
Tray 4 media feed/lift motor
2nd transfer roll retract motor 
K developer/transport motor
MPF pick solenoid 
MFP/transport drive motor 
Duplex drive motor 
Inverter clutch 
Duplex diverter gate solenoid
Transfer belt drive motor 
C toner add motor 
M toner add motor
Y toner add motor 
K toner add motor 
CMY developer drive motor
K developer clutch 
Fuser cooling fan 
Image density sensor shutter solenoid
Tray module drive motor
TTM tray 4 media transport motor
Waste toner auger motor 
Printhead shutter motor 
Standard exit shift motor
K erase lamp 
CMY erase lamps 
Scanner Motor Tests
ADF feed drv mtr
Exposure lamp
ADF registration drv mtr
Scanner drv mtr
Inverter solenoid
Pick roll position mtr
Document set LED 
						

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PRINT TESTSSee “PRINT TESTS” on page 3-7.
Tray 1
Tray 2
Tray 3
Tray 4
MP Feeder
Printing Quality Test Pages
See “Print Quality Test Pages” on page 3-7.
HARDWARE TESTS
Panel Test
See “Panel Test” on page 3-8.
Button TestSee “Button Test” on page 3-8.
DRAM TestSee “DRAM Test” on page 3-9.
CACHE TestSee “CACHE Test” on page 3-9.
DUPLEX TESTS
Quick Test See “Quick Test” on page 3-9.
Sensor Test See “Sensor Test (duplex)” on page 3-10.
INPUT TRAY TESTS
Feed Tests See “Feed Tests” on page 3-10.
Sensor Test See “Sensor Test (input tray)” on page 3-11.
OUTPUT BIN TESTS
Feed to All Bins See “Feed Tests (output bins)” on page 3-11.
Feed Tests See “Feed To All Bins” on page 3-12.
Sensor Tests See “Sensor Test (output bin)” on page 3-12.
FINISHER TESTS
Staple Test See “Staple Test” on page 3-12.
Hole Punch Test See “Hole Punch Test” on page 3-13.
Feed Tests See “Feed Tests (Finisher)” on page 3-13.
Sensor Tests See “Sensor Test (Finisher)” on page 3-13.
BASE SENSOR TESTSSee “BASE SENSOR TEST” on page 3-15.
Cover and Door
Devices
Exit Level
Media Path
Transfer Belt
DEVISE TESTSSee “DEVICE TESTS” on page 3-16.
Quick Disk Test
Disk Test/Clean
PRINTER SETUP
Defaults See “Defaults” on page 3-18.
Prt Color Pg Count See “Printed Color Page Count” on page 3-18.
Prt Mono Pg Count See “Printed Mono Page Count” on page 3-19.
Perm Page Count See “Permanent Page Count” on page 3-19.
Serial Number See “Serial Number” on page 3-19.
Engine Setting 1 to 4 See “Engine Setting 1 to 4” on page 3-19. 
						

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Model Name See “Model Name” on page 3-19.
Configuration ID See “Configuration ID” on page 3-19.
EVENT LOG
Display Log  See “Display the Event Log” on page 3-21.
Print Log See “Print the Event Log” on page 3-22.
Clear Log See “Clear the Event Log” on page 3-22.
SCANNER TESTS
ASIC Test See “ASIC Test” on page 3-23.
Feed Test See “Feed Test” on page 3-23.
Scanner Manual Registration See “Scanner Manual Registration” on page 3-24.
Sensor Tests See “Sensor Test (Scanner Tests)” on page 3-24.
Trans Belt Fail Clear
Trans Belt HP Fail Clear See “Trans Belt HP Fail Clear” on page 3-25.
Dev Unit ResetSee “Dev Unit Reset” on page 3-25.
Y Channel
M Channel
C Channel
K Channel
Fuser Temp Fail Clear
Fuser Temp Fail Clear See “Fuser Temp Fail Clear” on page 3-25.
ATC SENSOR FAILURE CLEARSee “ATC SENSOR FAILURE CLEAR” on page 3-25.
Y Channel (925.00)
M Channel (925.01)
C Channel (925.02)
K Channel (925.03)
ENGINE ADJUSTSee “ENGINE ADJUST” on page 3-26.
PH ADJUST (registration)
ATC sensor Adjust Values
ATC Sensor Adjust Cycles
RegCon Adjust
Booklet Fold AdjustSee “Booklet Fold Adjust” on page 3-29.
Booklet Tamper Shift Adj
Booklet Compile Position
Booklet 2-sheet
Booklet 15-sheet
Booklet Fold Pos Fine Adj
Booklet Staple Pos Fine Adj
Finisher ConfigSee “Finisher Config” on page 3-29.
Exit Diagnostics MenuSee “Exiting Diagnostics Menu” on page 3-34. 
						

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MOTOR TESTS
The tests in this group allow you to test specific motors, and on some motors run them forward or reverse.
To run the MOTOR TESTS:
1. Touch MOTOR TESTS from the Diagnostics Menu.
2. Touch the test to run. 
3. During the test, Motor Running... appears on the LCD.
Note:  If available, Forward and Reverse options appear on the LCD for selected tests.
Press Stop  to stop the test.
The following Finisher Motor Tests are available:
• Motor (entrance/paddle) • Stacker bin lift motor
• Motor (buffer/transport) • Booklet end guide drive motor
• Motor (exit) • Booklet paddle drive motor
• Fin diverter solenoid • Booklet front tamper motor
• Sub paddle solenoid • Booklet rear tamper motor
• Media eject clutch • Booklet folding/exit drive motor
• Media eject clamp motor • Booklet media entrance drive motor
• Media eject motor • Booklet transport motor
• Fin Buffer solenoid • Booklet knife solenoid
• Punch carriage shift motor • Booklet bin media transport motor
• Punch unit motor • Bridge unit diverter gate solenoid
• Front tamper motor • De-curler clutch
• Rear tamper motor • Bridge unit transport drive motor
• Stapler carriage motor • Booklet diverter gate solenoid
• Stapler unit motor • Booklet stapler motor
• • Bridge unit bin media exit solenoid
The following Printer Motor Tests are available:
• Transfer belt steering motor • Transfer belt drive motor
• CMY PC cartridge drive motor • C toner add motor
• K PC cartridge drive motor • M toner add motor
• Printhead polygon mirror motor • Y toner add motor
• Registration clutch • K toner add motor
• Tray 1 media feed/lift motor • CMY developer drive motor
• Tray 2 media feed/lift motor • K developer clutch
• Tray 3 media feed/lift motor • Fuser cooling fan
• Tray 4 feed/lift motor • Image density sensor shutter solenoid
• 2nd transport roll retract motor • Tray module drive motor (TTM)
• K developer transport drive motor • TTM tray 4 media transport motor
• MPF pick solenoid • Waste toner auger motor
• MPF transport drive motor • Printhead shutter motor
• Duplex drive motor • Standard exit shift motor
• Inverter clutch • K erase lamps
• Duplex diverter gate solenoid • CMY erase lamps
The following Scanner Motor Tests are available:
• ADF feed drv mtr • Inverter solenoid
• Exposure lamp • Pick roll position mtr
• ADF registration drv mtr • Scanner drive reverse
• Scanner drv mtr • Document set LED 
						

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PRINT TESTS
To run the Print Tests:
1. Touch PRINT TESTS from the Diagnostics Menu.
2. Touch [Input Source] to verify that the printer can generate output from that source’s media.
3. Touch Printing Quality Test Pages to view information about the printer’s current settings and to test the 
printer’s ability to generate quality output.
4. Touch Single or Continuous. 
•If Single is selected, a single page is printed.
•If Continuous is selected, printing continues until Stop   is pressed to cancel the test.
If a source is selected that contains envelopes, an envelope test pattern is printed. If Continuous is 
selected, the test pattern is printed only on the first envelope.
After a Single test has printed or a Continuous test canceled, the LCD returns to the [Input Source] screen. 
Input Source Print Test
Regardless of the input source selected, the printer always generates a simplex version of the Print Test page 
using its default resolution. 
Print Quality Test Pages
This setting enables you to view the values of a broad range of the device’s settings and to test the device’s 
ability to generate acceptable printed output.
The printer automatically generates a Print Quality Test page in English and an:
1. Entire printable area of the page is solid dark blue
2. Entire printable area of the page is solid dark magenta
3. Entire printable area of the page is solid dark yellow
4. Entire printable area of the page is solid dark black
5. Entire printable area of the page is solid light blue
6. Entire printable area of the page is solid pink
7. Entire printable area of the page is solid light yellow
8. Entire printable area of the page is solid gray
The device always uses the media that is currently installed in Tray 1 to print this report. Once started, printing 
cannot be canceled and all key presses are ignored until printing completes.
The test pages are always simplexed, regardless of the value of the duplex setting.Input source Appears on the LCD
Tray 1Tray 1 Printing...
Tray 2Tray 2 Printing...
Tray 3 Tray 3 Printing...
Tray 4 Tray 4 Printing...
MP FeederMP Feeder Printing...
Printing Quality Test PagesPrinting Quality Test Pages... 
						

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HARDWARE TESTS
Touch the following Hardware Tests from this menu:
•Panel Test
•Button Test
•DRAM Test
•CACHE Test
Panel Test
This test automatically toggles all pixels on the LCD through every contrast level beginning with the darkest to 
the brightest. This test shows non-functioning pixels as blank spaces during the darkest contrast. 
This test continues until you press Stop  , then the LCD returns to HARDWARE TESTS.
Button Test
The Button Test is used to verify the operation of each button on the operator panel. 
To perform the Button Test: 
1. Touch HARDWARE TESTS from the Diagnostics Menu. 
2. Touch Button Test. The LCD displays a graphic of the operator panel buttons that matches the layout of 
the operator panel buttons.
3. Press any button on the operator panel and that button on the LCD appears shaded.
4. Release the button and the shading is removed.
Touch Back to exit the test.
vga
?Back
1
23
45
6
78
9
0#
*
,
SG
C 
						

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DRAM Test
The DRAM Test is used to check the validity of both the printer’s standard and optional DRAM. The test involves 
writing patterns of data to DRAM to verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
1. Touch HARDWARE TESTS from the Diagnostics Menu.
2. Touch DRAM Test. DRAM Test Testing... appears on the LCD, and then Resetting the Printer 
appears. The printer automatically performs a POR. 
The following type of message appears:
•P:###### represents the number of times the memory test has passed and finished successfully. 
Initially 000000 displays with the maximum pass count being 999,999.
•F:##### represents the number of times the memory test has failed and finished with errors. Initially 
0000 displays with the maximum fail count being 99,999. Initially only four digits appear, but 
additional digits appear as needed.
To stop this test before completion, turn the printer off.
CACHE Test
This test is used to verify the printer processor cache.
To run the CACHE Test:
1. Touch HARDWARE TESTS from the Diagnostics Menu.
2. Touch CACHE Test. CACHE Test Testing... appears on the LCD, and then Resetting the Printer 
appears. The printer automatically performs a POR. 
The following type of message appears:
•P:###### represents the number of times the cache has passed and finished successfully. Initially 
000000 displays with the maximum pass count being 999,999.
•F:##### represents the number of times the cache has failed and finished with errors. Initially 0000 
displays with the maximum fail count being 99,999. Initially only four digits appear, but additional 
digits appear as needed.
Each time a test is completed, the number of passes and failures is incremented. If the test fails, the message 
Failure appears for approximately three seconds, and the failure count increases by one.
The test continues until all of the printer processor’s cache has been tested. Once the maximum pass count or 
fail count is reached, the test is stopped, and the final results display.
To stop this test before completion, turn the printer off.
DUPLEX TESTS 
Quick Test 
This test prints a duplex version of the Quick Test that can be used to verify that the correct placement of the top 
margin on the back side of a duplex page. You can run one duplexed page (Single), or continue printing 
duplexed pages (Continuous) until Stop   is pressed. DRAM Test 256 MB P:###### F:####
CACHE Test x100 P:###### F:#### 
						

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Make sure either letter or A4 size paper is loaded in the default paper source. If the default source only supports 
envelopes, then the Quick Test will be printed from Tray 1.
To run the Quick Test:
1. Touch DUPLEX TESTS from the Diagnostics Menu.
2. Touch Quick Test.
3. Touch Single or Continuous. Quick Test Printing... appears on the LCD.
•The single Duplex Quick test cannot be canceled.
•The printer attempts to print the Quick Test Page from the default paper source. If the default paper 
source only supports envelopes, then the page is printed from Tray 1.
•Check the Quick Test Page for the correct registration between the placement of the first scan line on 
the front and back side of a duplexed sheet.
The single test stops automatically when a single duplex sheet is printed, and the continuous test continues until 
you press Stop .
Sensor Test (duplex)
This test is used to determine whether or not the duplex sensors and switches are working correctly. The test 
allows you to actuate the duplex input sensor located in the back part of the duplex unit and the duplex exit 
sensor located in the return paper path.
1. Touch DUPLEX TESTS from the Diagnostics Menu.
2. Touch Sensor Test.
3. Touch Duplex wait and Duplex wait Testing... appears on the LCD.
4. Touch Door B duplex left and Door B duplex left Testing...appears on the LCD.
You can manipulate the appropriate area of the printer to make the sensor toggle between “Open” and “Closed”. 
If the wrong message is displayed, then the sensor must be malfunctioning. 
Press Stop   to cancel the test.
INPUT TRAY TESTS
Feed Tests 
Use this test to observe the paper path of media as it passes through the printer. No information is printed on the 
feed test pages since the laser is not engaged during this test.
You can perform the feed test using media from any installed input source. All pages used during the feed test 
are dropped into the default output bin. 
To run the Input Tray Tests:
1. Touch INPUT TRAY TESTS from the Diagnostics Menu.
2. Touch the input source.
3. Touch either Single or Continuous.  Input source Appears on the LCD
Tray 1Tray 1 Feeding...
Tray 2Tray 2 Feeding...
Tray 3 Tray 3 Feeding...
Tray 4 Tray 4 Feeding...
MP FeederMP Feeder Feeding...