Lexmark X792 7562-4xx, Service Manualv

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Service Manual
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SCANNER CALIBRATION
Adjust Calibration Values
This menu is used to manually adjust the scanner black levels to optimize printed text and images from scanned
or copied originals. Use this menu to adjust the levels after you replace any of the following parts:
–
Flatbed scanner assembly
–
ADF unit assembly
–
Flatbed scanner CCD assembly
–
ADF duplex CCD assembly
For more information, see “Calibrating the scanner black levels” on page 3-67 .
Reset Calibration Values
This resets the scanner black levels to factory default settings. These values must be reset after you replace any
of the following parts:
–
Flatbed scanner assembly
–
ADF unit assembly
–
Flatbed scanner CCD assembly
–
ADF duplex CCD assembly
MISC TESTS
Toggle ITU
The test is used to verify that ITU belt retraction, BOR, hardware is functioning properly. Two options are
available: Raise Belt and Lower Belt. If the belt is already in the requested position, no action occurs. Otherwise
the belt will move to the requested position.
1.
From the Diagnostics menu, navigate to:
MISC TESTS > Toggle ITU
2.
Select Raise Belt or Lower Belt from the menu.
Raise ITU Testing…
or
Lower ITU Testing…
appears.
3.
The results appear on the display. For example:
Lower ITU Test Passed
. To exit the test, press any button.
If this test fails, replace the ITU.
Printhead Inst
This test prints a page that aids in the mechanical alignment of the printhead. This test should not be used
independently of the printhead coarse alignment. See
“Installing and coarse aligning the printhead” on
page 4-123 .
Auto Detect
This test initiates an automatic component detect process. Auto Detect should be used after you replace the
system board.