Lexmark X 204 Service Manual

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3.  Diagnostic aids
This chapter explains the tests and procedures to identify printer failures and verify repairs have corrected the 
problem.
Accessing service menus
There are different test menus that can be accessed during POR to identify problems with the printer.
These menus do not require a POR to access them::Configuration Menu 1. Press and hold  and  .
2. Turn on the printer.
3. Release the buttons when 
Performing Self Test 
displays.The Configuration Menu...

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Diagnostics mode
When the Diagnostics mode is entered, each Diagnostics main menu item displays on the operator panel. When 
a diagnostic test is selected from the main menu, a sub menu displays and each individual test displays in the 
order shown. Any options that are referred to in the menus are displayed when the option is installed.
Available tests
The tests display on the operator panel in the order shown:
Diagnostics mode tests
REGISTRATION
Top Margin These tests...

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Registration
Printer
Print registration makes sure the black printing is properly positioned on the page. 
To set print registration:
1.Select REGISTRATION from the DIAGNOSTICS menu.
2.Use   or   to select Quick Test, and press  . See “Quick test” on page 3-4. 
The message Quick Test Printing… appears on the display, and the page prints.
Retain this page to determine the changes you need to make to the margin setting’s.
3.Use   or   to select the margin setting you need...

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5.Print another copy of the Quick Test to verify your changes.
6.Continue changing the setting’s by repeating steps 3 through 5.
To exit REGISTRATION, press Back (
). 
Quick test
The Quick Test contains the following information:
•Print registration setting’s
•Alignment diamonds at the left, right, top. and bottom
•Horizontal lines to check for skew
•General printer information, including current page count, serial number, and code level.
To print the Quick Test page:...

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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 vary 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 Diag Menu, and press Select ().
2.Select the media source...

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To run the Button Test:
1.Select Hardware Tests from Diag Menu, and press Select ().
2.Select Button Test, and press Select ().
press count: 0 appears.
press each operator panel button, and watch to see if the number of press counts increases by one for 
each press.
Note:  If you press Stop ( ), you end the test.
Press Stop ( ) to cancel the test.
DRAM Test
This test checks the validity of DRAM, both standard and optional. The test writes patterns of data to DRAM to...

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Input Tray tests
Feed Tests
This test allows you to observe the paper path of media as it passes through the printer. Any installed input tray 
can be tested. The pages fed through the printer are blank.
To run the Feed Test:
1.Select INPUT TRAY TESTS from Diag Menu, and press Select ().
2.Select Feed Tests, and press Select ().
3.Select the tray to be tested. Choices are installed trays, including Tray 1,and MP Feeder.
4.Open the upper rear door to view the paper path....

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To view the Prt Color Pg Count, the Prt Mono Pg Count, or the Perm Page Count:
1.Select PRINTER SETUP from DIAGNOSTICS, and press Select ().
2.Select PAGE COUNTS, and press Select ( ). 
3.Select the page count you wish to view:
•Prt Color Pg Count
•Prt Mono Pg Count
•Perm Page Count
4.Press Select ().
The value of the page count appears.
Press Back (
) to return to PRINTER SETUP.
Serial Number
The serial number can only be viewed. It cannot be changed.
To view or change...

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•To move to the next character or digit, press   or  , and press Select ().
•When you press Select ( ) on the last digit, the value will be submitted. 
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 Configuration ID 2.
4.Repeat the steps for entering the Configuration ID 2, and press Select ().
If...

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Gap Adjust
Adjusts the minimum gap between sheets during printing. This setting reduces speed (pages per minute), but 
can be used to reduce curl of printed media and improve stacking in the output bin. 
The range is 0 (default) to 255. Adjusting by one results in 9 mm of increased gap.
Auto Dark Adjust
This setting attempts to optimize the amount of toner used when printing with a specific operating point. Each 
time this setting executes, the printer performs the...