Lexmark C77X, Service Manual

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3-14
Service Manual
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3.
Evaluate results:
When the test is complete, the following screen is displayed:
If the test is successful, the pass code will be a number between -250 and +250. Do not install a shim.
If the test fails, then a fail code will be a number between 0 and 200 and a message indicates the cause of
the failure. The following is a list of failure codes:
4.
Exit the test; press any button.
5.
Verify the failure code by comparing the belt position to the initial position. Install the shim to the rear if the
belt tracked to the rear. Install the shim to the font if the belt tracked to the front. Refer to the instructions
included with the shim for installation.
6.
After installing the shim, run the test again. If the test fails, rerun several times as the belt needs time to
stabilize. Once the test is successful, reinstall the cartridges and restart the printer.
Printhead Inst
The purpose of this test is to print a page that aids in the mechanical alignment of a printhead. This test should
not be used independently of the mechanical alignment. See
“Mechanical alignment” on page 4-73 .
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 only contains text, which consists of continuous print of each character in the selected symbol set.
•
If Continuous is selected, all sources printing with media sizes prints the same page continuously until the
test is stopped. 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.
Select PRINT TESTS from the Diagnostics mode.
2.
Select the paper source from the menu.
Failure Code Results
01 Cover open.
02 Some cartridges NOT removed.
03 Less than three revolutions before the test ended (may never be displayed). Belt
tracked to front.
04-100 Number of revolutions when test ended, belt tracked to front.
103 Three or fewer revolutions before test ended. Belt tracked to rear. Probably never
displayed.
104-200 100 or more revolutions when test ended. Belt tracked to rear.
Test Complete
Code <
pass code >
Test Failed
Failure Code=<
fail code >
OR