Lexmark MS71x, Service Manual

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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.
To run the Serial Wrap Test:
1
Disconnect the serial interface cable, and install the wrap plug.
2
From the Diagnostics menu, navigate to HARDWARE TESTS >Serial Wrap Test.
3
Select the appropriate Serial Wrap Test from the list. Values may include Serial Wrap , Serial 1 Wrap , Serial 2
Wrap, or Serial 3 Wrap . Each time the test finishes, the screen updates with the result. P and F represent the same
numbers for DRAM. If the test passes, the Pass Count increases by 1. However, if the test fails, one of the following
failure messages appears for approximately three seconds, and the Fail Count increases by 1:
Receive Status Interrupt Error
Status Error
Receive Data Interrupt Error
Transmit Data Interrupt Error
Transmit Empty Error
Threshold Error
Receive Data Ready Error
Break Interrupt Error
Framing Error
Parity Error
Overrun Error
Data Error
Data 232 Error
Data 422 Error
FIFO Error
DSR Error
DSR PIO Error
DSR Interrupt Error
CTS Error
CTS PIO Error
CTS Interrupt Error
After the maximum count is reached or a failure occurs, the test stops.
4
Press Stop (X) to cancel the test.
USB HS Test Mode
1
From the Diagnostics menu, navigate to:
Hardware Tests > USB HS Test Mode
2
Choose the desired port, and then choose the desired test.
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Service menus
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