Lexmark MX71 series, Service Manual, Page: 233 / 807

To run the test for non
‑
touchscreen models:
1
From the Diagnostics menu, navigate to:
HARDWARE TESTS > Button Test
2
The panel displays
Press
and an icon matching one of the control panel buttons. Press the physical button that is
represented by the icon, and the printer tests the function of that button.
If the test is successful, then the panel displays another icon to test.
If a button fails the test, or if a different button is pressed, then the panel displays
Test Failed
and returns to
the main section of the HARDWARE TESTS menu. After three seconds of inactivity, the panel automatically returns
to the main section of the HARDWARE TESTS menu.
If all buttons pass the test, then the panel displays
PASSED
and returns to the main section of the HARDWARE
TESTS menu.
3
Press X or Back to exit the test.
To run the test for the touchscreen models:
1
From the Diagnostics menu, navigate to:
HARDWARE TESTS > Button Test
2
With no buttons pressed, a pattern matching the control panel buttons is displayed. Press each control panel button
one at a time, and the panel highlights the represented button in the matching pattern.
3
Release the button, and the highlight disappears.
4
Press X or Back to exit the test.
DRAM Test
This test checks the validity of DRAM, both standard and optional. The test repeatedly writes patterns of data to the
DRAM to verify that each bit in the memory can be set and read correctly.
To run the DRAM test:
1
From the Diagnostics menu, navigate to:
Hardware Tests > DRAM Test
2
Testing…
appears, followed by
Resetting the Printer
.
3
After the printer resets, the results of the test appear:
DRAM Test [x] P:###### F:######
.
•
[x]
—Represents the size of the installed DRAM.
•
P:######
—Represents the number of times the memory test has passed and finished successfully, with the
maximum pass count being 999,999.
•
F:#####
—Represents the number of times the memory test has failed and finished with errors, with the
maximum fail count being 999,999.
4
After the maximum pass count or fail count is reached, or when all the DRAM has been tested, the test stops and
the final results appear.
Serial Wrap Test
Use this test to check the operation of the Serial Port Hardware using a wrap plug. Each signal is tested. If the test fails,
replace the controller board.
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Service menus
231