Serial Wrap Test - Lexmark W820 Service Manual

Serial Wrap Test

Use the Serial Wrap Test to check the operation of the serial port hardware using a wrap
plug. Each serial signal is tested.
To perform the wrap test:
1.
2.
3.
The following screen is displayed and the printer begins testing the serial hardware for the
first time.
Serial x Wrap
P:###### F:#####
Terminology:
•
•
•
The power indicator blinks indicating the test is in process. The printer continually runs
the same test until cancelled from the operator panel (by pressing Return or Stop).
Each time the test finishes, the screen is updated with the result. If the test passes, then
the Pass Count is incremented by 1. However, if the test fails, then one of the following
failure messages is displayed for approximately 3 seconds and then the Fail Count is
incremented by 1.
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Service Manual
Disconnect the serial interface cable, and install the serial wrap plug.
Select HARDWARE TESTS from the Diagnostics Menu.
Select the appropriate Serial Wrap Test (Serial Wrap, Serial 1 Wrap, Serial 2 Wrap,
or Serial 3 Wrap).
x indicates which serial port is being tested (blank=standard serial, 1=optional serial
port #1, 2=optional serial port #2, 3=optional serial port #3).
P:###### represents the number of times the test has passed (finished
successfully). Initially 000000 is displayed for ######. The maximum pass count is
999,999.
F:##### represents the number of times the test has failed (finished with errors).
Initially 00000 is displayed for #####. The maximum fail count is 99,999.
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