Lexmark E 450 Dn Service Manual

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PRINT TESTS 
Input source tests
The purpose of the diagnostic Print Tests is to verify that the printer can print on media from each of the installed 
input options. The contents of the Print Test Page varies depending on the media installed in the selected input 
source.
Check each Test Page from each source to assist in print quality and paper feed problems.
To run the Print Test Page:
1.Select PRINT TESTS from the Diagnostics menu.
2.Select the media source.
Tray 1
Tray 2 (if installed)
Multipurpose Feeder (if installed)
Envelope Feeder (if installed)
3.Select 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.
Note:  The Print Test Page always prints on one side of the paper, regardless of the duplex setting or the 
presence of a duplex option.
Press Back ( ) to return to PRINT TESTS. 
Print quality pages (Prt Quality Pgs)
The purpose of this diagnostic function is to allow printing of the print quality test pages with the toner cartridge 
lockout function disabled. The print quality pages consist of three pages. Page one contains a mixture of 
graphics and text. Pages two and three only contain graphics. 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.
To run the Print Quality Test Pages, select Prt Quality Pgs from PRINT TESTS. The message Printing 
Quality Test Pages is displayed. 
Note:  The print quality test pages can also be printed from the Configuration menu (CONFIG MENU), however 
a cartridge must be installed with a machine class ID matching the machine class ID stored in NVRAM. 
Additional diagnostic information may be printed on the pages when printing from DIAGNOSTICS.
The following is included in the DIAGNOSTICS version of the print quality pages:
•Values from EP SETUP in DIAGNOSTICS, including: 
Fuser temperature, warm up time, transfer, print contrast, and charge roll settings. 
•Contents of the EVENT LOG from DIAGNOSTICS. 
•Configuration information, including printer serial number, controller code level, engine code level, operator 
panel code level, font versions, and cartridge information. 
•Default values for the QUALITY MENU settings used to print the pages. 
						

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HARDWARE TESTS
Select the following Hardware Tests from this menu:
•Panel Test
•Button Test
•DRAM Test
•ROM Memory Test
•Parallel Wrap (if available)
•Serial Wrap (if available)
Panel Test
This test automatically toggles each pixel of the operator panel through every contrast level beginning with the 
darkest and on to the brightest. This test continues until you press Stop ()
.
Button Test
The Button Test verifies the operation of the buttons on the operator panel. When you select Button Test, a 
diagram of the operator panel appears on the panel. When you press a button on the operator panel, an X 
appears on the corresponding diagram. When you release the button, an X disappears. Pressing Back () or 
Stop ( ) cancels the test.
DRAM Test
The purpose of this test is to check the validity of DRAM memory, both standard and optional. The test writes 
patterns of data to DRAM to verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
1.Select DRAM Test from the menu. 
The message DRAM Test Testing… displays. Then the message Resetting Printer appears.
The following type of message appears:
•xxx represents the installed DRAM size.
•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.
Each time the printer finishes a test, it increments “P” or “F” by 1 according to the success or failure of the 
DRAM.
While the DRAM test executes, the power indicator light blinks green. To stop the test before completion, turn the 
printer off.DRAM Testxxx MB
P:######F:#### 
						

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Parallel Wrap tests
This test is used with a wrap plug to check operation of the parallel port hardware. Each parallel signal is tested. 
Use Parallel Wrap for the standard parallel port, Parallel 1 Wrap if a parallel port is available by PCI slot 1, or 
Parallel 2 Wrap if a parallel port is available by PCI slot 2.
To run the Parallel Wrap tests:
1.Disconnect the parallel interface cable, and install the wrap plug (P/N 1319128).
2.Select Parallel Wrap, Parallel 1 Wrap, or Parallel 2 Wrap from the HARDWARE TESTS menu. 
The power indicator blinks green, indicating the test is in progress. The test runs continuously until a 
maximum number of tests is reached.
•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 999,999. Initially, only four digits appear, but 
additional digits appear as needed.
Each time the test finishes, the screen updates. If the test passes, the pass counter increases by 1, 
however if the test fails, a message displays for approximately three seconds. Once the maximum count is 
reached, the test stops. The power indicator goes on solid, and the final results display. 
To stop the test before completion, press Stop (). Parallel Wrap
P:######F:#### 
						

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DUPLEX TESTS 
Quick Test (duplex)
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. For information about changing the margin, see 
“Top/Left Margin (duplex)” on page 3-16.
Note:  Before you set the duplex top margin, be sure to set the registration. See “REGISTRATION” on 
page 3-4.
The paper you choose to print the page on should be either Letter or A4.
To run the Quick Test (duplex):
1.Select Quick Test from DUPLEX TESTS.
2.Select Single or Continuous. 
•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 offset 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 (
).
Top/Left Margin (duplex)
This setting controls the offset between the first scan line on the front of the duplex page and the first scan line 
on the back of the page. Therefore, be sure to set the top margin in REGISTRATION before setting the duplex 
top margin. See “REGISTRATION” on page 3-4.
To set the Top/Left Margin (duplex):
1.Print the Quick Test (duplex):
a.Select Quick Test from DUPLEX TESTS.
b.Select Single.
c.Hold the page to the light to see the whether the top margin of the backside aligns with the top margin 
of the frontside.
2.Select To p  M a r g i n from DUPLEX TESTS.
3.Use   or   to select the margin setting you need to change.
•Each increment shifts the duplex top margin by 1/100 of an inch. 
•The Top Margin (duplex) range is -20 to +20, and the default value is 0.
•An increase moves the top margin down and widens the top margin. A decrease moves the top 
margin upward and narrows the top margin.
4.Press .
5.Print the Quick Test (duplex) again to verify the adjustment. Repeat if necessary. 
						

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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.Select Sensor Test from DUPLEX TESTS.
The message Sensor Test Testing displays.
2.Manually actuate each of the duplex sensors. When the sensor/switch is closed, CL (closed) displays, and 
when the sensor/switch is open, OP (open) displays.
•Duplex input sensor
•Duplex exit sensor
3.Press Back () or Stop () to exit the test.
Duplex Feed 1
This test feeds a blank sheet of paper to the duplex paper stop position 1. This test can be run using any of the 
supported paper sizes.
To run the Duplex Feed 1 Test:
1.Select Duplex Feed 1 from DUPLEX TESTS.
The power indicator blinks while the paper is feeding, and the message Duplex Feed 1 Feeding… 
displays.
The message Duplex Feed 1 Clear Paper displays when the paper reaches paper stop position 1, 
and the power indicator turns on solid.
2.Remove the media from the duplex unit, and clear the message on the operator panel by pressing Stop 
(
). 
						

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INPUT TRAY TESTS
Feed Tests (input tray)
This test lets the servicer observe the paper path as media is feeding through the printer. A blank sheet of paper 
feeds through the printer as the laser turns off during this test. The paper is placed in the output bin.
To run the Input Tray Feed Tests:
1.Select Feed Tests from INPUT TRAY TESTS.
2.Select the input source from the sources displayed on the Feed Tests menu. All installed sources are listed.
3.Select either Single or Continuous. 
•Single–feeds one sheet of media from the selected source.
•Continuous–media continues feeding from the selected source until Stop () is pressed. 
						

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OUTPUT BIN TESTS
Feed Tests (output bins)
Use these tests to verify that media can be fed to a specific output bin. Media is fed from the default input source 
to the selected output bin. No information is printed on the media fed to the output bin because the printhead is 
not engaged during this test. These tests can use any media size or envelope supported by the printer.
To run the Feed Tests for the output bins:
1.Select Feed Tests from the OUTPUT BIN TESTS.
2.Select the output bin you want the paper to exit into. The standard bin as well as any output option bin 
installed on the printer is shown on the menu. (The output bins are displayed in the order installed on the 
printer.)
3.Select either Single or Continuous.
•Single–feeds one sheet of media from the selected source.
•Continuous–media continues feeding from the selected source until Stop () is pressed.
Press Back ( ) to return to OUTPUT BIN TESTS.
Sensor Test (standard output bin)
This test is used to verify if the standard bin sensor is working correctly.
To run the Sensor Test for the standard bin:
1.Select Sensor Test from OUTPUT BIN TESTS.
2.Select Standard Bin from Sensor Tests.
3.Select NearFull or Full sensor to test.
The following screen is displayed:
Standard Bin x
Full=Open NearFull=Open
•Full–Bin full sensor
•NearFull–Bin near full sensor
4.Manually actuate the bin sensor by moving the flag in and out of the sensor. The display indicates Open 
when the flag is out of the sensor and Closed when the flag is in the sensor.
5.Press Back() or Stop( ) to exit the test. 
						

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BASE SENSOR TEST
This test is used to determine if the sensors located inside the printer are working correctly.
To run the Base Sensor Test:
1.Select BASE SENSOR TEST from the DIAGNOSTICS menu.
The following sensors are listed:
•Exit–Exit sensor
•Front Door–Front door sensor
•Input–Input sensor
2.Manually actuate the sensors to verify that each sensor switches from Open to Closed.
3.Press Back() or Stop( ) to exit the test. 
						

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PRINTER SETUP
Defaults
US/Non-US defaults changes whether the printer uses the US factory defaults or the non-US factory defaults. 
The settings affected include paper size, envelope size, PCL symbol set, code pages, and units of measure.
Warning:  Changing this setting resets the printer to factory defaults, and data may be lost. It cannot be undone.
Page Count
The page count can only be viewed and cannot be changed.
To view the page count:
1.Select Page Count from PRINTER SETUP.
2.Press Back () to return to PRINTER SETUP.
Perm Page Count (permanent page count)
The permanent page count can only be viewed and cannot be changed.
To view the permanent page count:
1.Select Perm Page Count from PRINTER SETUP.
2.Press Back () to return to PRINTER SETUP.
Serial Number
The serial number can only be viewed and cannot be changed.
To view the serial number:
1.Select Serial number from PRINTER SETUP.
2.Press Back () to return to PRINTER SETUP.
Engine Setting 1 through 4
Warning:  Do not change these settings unless requested to do so by your next level of support. 
Model Name
The model name can only be viewed and cannot be changed. 
						

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Configuration ID
The two configuration IDs are used to communicate information about certain areas of the printer that cannot be 
determined using hardware sensors. The configuration IDs are originally set at the factory when the printer is 
manufactured, however the servicer may need to reset Configuration ID 1 or Configuration ID 2 whenever you 
replace the system board. The IDs consist of eight hexadecimal characters, including 0 through 9 and A 
through F.
Note:  When the printer detects a Configuration ID that is not defined or invalid, the following occurs:
•The default standard model Configuration ID is used instead.
•Configuration ID is the only function available in DIAGNOSTICS.
•Unless the menu is in DIAGNOSTICS, Check Config ID displays. 
To set the configuration ID:
1.Select Printer Setup from the Diagnostic mode.
2.Select Configuration ID from the Printer Setup menu.
Submitting Selection displays, followed by the value for Configuration ID 1.
3.Enter the Configuration ID 1.
•To select a digit or character to change, press   or   until the digit or character is underlined.
•To change a digit or character, press   to increase or   to decrease the value.
•When the last digit is changed, press  to validate the Configuration ID 1.
If Invalid ID appears, the entry is discarded, and the previous Configuration ID 1 is displayed on 
the screen.
If the process is successful, Submitting Selection appears on the display, followed by the 
current value for Confirguration ID 2.
4.Repeat the steps for entering the Configuration ID, and press .
If the Configuration ID 2 is validated, Submitting Selection appears, and a check ( ) appears next 
to Printer Setup. 
5.Restart the printer.
Edge to Edge
When this setting is On, the text and graphics are shifted to the physical edges of the paper for all margins. 
When the setting is Off, the normal margins are restored.
Parallel strobe adjustment (Par x Strobe Adj)
This setting adjusts the amount of time the strobe is sampled in order to determine if the valid data is available 
on the parallel port. The range of values are from -4 to 6, and the default is 0 for Par S Strobe Adj, 
Par 1 Strobe Adj, and Par 2 Strobe Adj. After adjustment of 1 increment, the strobe samples 50 ns longer.