Lexmark C792 Family, Service Manual

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Diagnostic aids
3-13
5062
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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 4-125 .
Auto Detect
This test initiates an automatic component detect process. Auto Detect should be used after you replace the
system board.
PRINT TESTS
Print Tests (input sources)
This test determines if the printer can print on media from any of the paper input sources. Each of the installed
sources is available within the Print Tests menu.
The content of the test page varies depending on the media installed in the selected input source.
•
If a source is selected that contains paper, then a page similar to the Quick Test Page is printed and does
not contain the Print Registration diamonds.
•
If a source is selected which contains envelopes, then an Envelope Print Test pattern is printed. This
pattern contains only text, which consists of continuous prints of each character in the selected symbol set.
•
If Continuous is selected, then the same page prints continuously from the selected source until you press
Stop (
X
). If Continuous is selected from a source which contains envelopes, then the envelope print test
pattern is printed on the first envelope, and the rest are blank.
The Print Test page always prints single-sided, regardless of the Duplex setting or the presence of the Duplex
option.
To run the Print Test:
1.
From the Diagnostics menu, touch PRINT TESTS .
2.
Select the paper source.
3.
Select either Single or Continuous .
Note: If Single is selected, no buttons are active while the Print Test Page is printing. If Continuous is
selected, Stop (
X
) can be pressed to cancel the test.
4.
At the end of the test, the printer returns to the PRINT TESTS menu.