Lexmark E 450 Dn Service Manual

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DUPLEX TESTS (if installed)
Quick Test See “Quick Test (duplex)” on page 3-16
Top Margin See “Top/Left Margin (duplex)” on page 3-16
Sensor Test See “Sensor Test (duplex)” on page 3-17
Duplex Feed 1 See “Duplex Feed 1” on page 3-17
INPUT TRAY TESTS
Feed Tests See “Feed Tests (input tray)” on page 3-18
OUTPUT BIN TESTS
Feed Tests See “Feed Tests (output bins)” on page 3-19
Sensor Test See “Sensor Test (standard output bin)” on page 3-19
BASE SENSOR TESTSee “BASE SENSOR TEST”...

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Exiting Diagnostics mode
Select Exit Diagnostics to exit the Diagnostics mode. Resetting the Printer displays, the printer 
performs a POR, and returns to normal mode.
REGISTRATION
Print registration makes sure the printing is printed properly aligned on the page.
The settings available are:
Bottom Margin
Top Margin
Left Margin
Right Margin
Quick Test
To set print registration:
1.Select REGISTRATION from the DIAGNOSTICS menu.
2.Select Quick Test, and press  .
To print the...

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3.Use   or   to select the margin setting you need to change, and press  .
The Top margin sign/value pair blinks. This indicates it is the margin value being changed.
4.Use   to decrease or   to increase the offset values, and press   to confirm the value.
The message Submitting selection displays, and the original REGISTRATION screen appears with 
the   beside the previously selected margin setting.
The print registration range is:
5.Continue changing the settings by...

3-6Service Manual 4512-630  
Printhead assembly electronic adjustment
A step-by-step process to align a new printhead.
Note:  Before aligning the printhead electronically, first align the printhead mecahnically, if needed. See 
“Printhead assembly mechanical adjustment” on page 3-10
1.Press Go to print Step 1 test page. 
2.In column  of Step 1 test page, look for the position where the vertical lines are the closest to each 
other. Press to select the corresponding number (new setting).
3.Press and...

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5.Press Go to print Step 2 test page.
6.Press to change the  settings to the number beside the darkest portion of the vertical bar.
7.Press and release to move to the  settings on the right side of Step 2 test page.
8.Press to change the  settings to the number beside the darkest portion of the vertical bar.
Step 2 printout
(sample only; use actual sheet) 

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9.Press Go to print Step 3 test page.
10.Press to change the  setting to the number beside the darkest portion of the vertical bar.
11.Press and release to move to the  settings on the right side of Step 3 test page.
12.Press to change the  settings to the number beside the darkest portion of the vertical bar.
Step 3 printout
(sample only; use actual sheet) 

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13.Press Go to print Visual alignment page.
14.Verify that the overall darkest line across the page is “0.” If not, then run the alignment again.
15.Turn the printer off to exit the printer alignment menu.
Visual alignment printout
(sample only; use actual sheet) 

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Printhead assembly mechanical adjustment
A printhead needs to be correctly positioned after it has been removed. Align it to the frame or use the same 
position as the removed printhead. An indicator is located at the front right-hand screw for reference.
Note:  Skew is caused by a sheet being fed through the printer while misaligned. The entire image is rotated 
relative to the sheet edges. However, a mechanically misaligned printhead causes the horizontal lines to appear...

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7.If the grid lines of the right flap align below the corresponding lines on the left flap, adjust the printhead 
clockwise relative to the printer and recheck. (See the left side of the figure below.) If the grid lines of the 
left flap align below the corresponding lines of the right side, adjust the printhead counterclockwise. (See 
the right side of the figure below.)
8.After obtaining a properly adjusted image on the paper, tighten all three screws.
Note:  The...

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Quick Test
The Quick Test contains the following information:
•Print registration settings
•Alignment diamonds at the top and bottom
•Horizontal lines to check for skew
•General printer information, including current page count, installed memory, serial number, and code level.
To print the Quick Test page:
Note:  Print the Quick Test Page on letter or A4 paper.
1.Select REGISTRATION from DIAGNOSTICS.
2.Press   until the   appears next to Quick Test.
The message Quick Test...