Cache Test; Parallel Wrap - Lexmark X850e Service Manual

CACHE Test

This test is used to verify the printer processor cache.
To run the CACHE Test:
1.
Touch HARDWARE TESTS from the Diagnostics Menu.
Touch CACHE Test. CACHE Test Testing... appears on the LCD. Then the message Resetting
2.
the Printer appears. While the CACHE test executes, the power LED is green. The printer
automatically performs a POR.
The following type of message appears:
CACHE Test
•
P:###### represents the number of times the cache has passed and finished successfully. Initially
000000 displays with the maximum pass count being 999,999.
•
F:##### represents the number of times the cache has failed and finished with errors. Initially 0000
displays with the maximum fail count being 99,999. Initially only four digits appear, but additional
digits appear as needed.
Each time a test is completed, the number of passes and failures is incremented. If the test fails, the message
Failure appears for approximately three seconds, and the failure count increases by one.
The test continues until all of the printer processor's cache has been tested. Once the maximum pass count or
fail count is reached, the test is stopped, and the final results display.
To stop this test before completion, turn the printer off.

Parallel Wrap

This test verifies the proper functioning of the parallel port hardware using a wrap plug. Each parallel signal is
tested.
To run the Parallel Wrap tests:
1.
Disconnect the parallel interface cable, and install the parallel wrap plug.
2.
Touch HARDWARE TESTS from the Diagnostics Menu.
3.
Touch Parallel Wrap and the following appears on the LCD.
Parallel Wrap Testing...
Each time the printer finishes a test, it increments Pass Count or Fail Count by one according to the success or
failure of the parallel port hardware. When the maximum number of tests have been executed, the test stops
and displays the results.
to stop the test. Parallel Wrap Cancelled appears on the LCD, and then returns to the
Press Stop
HARDWARE TESTS menu.
x100 P:######
Pass Count: 0
Fail Count: 0
F:####
Diagnostic aids
7500-XXX
3-9