Serial Wrap Test - Lexmark C720 Service Manual

5024-001

Serial Wrap Test

This test is used to check the operation of the serial port hardware
using a wrap plug. Each signal is tested.
To run the serial wrap test:
1. Disconnect the serial interface cable and install the wrap plug.
2. Select the appropriate Serial Wrap Test from the menu.
The following screen displays: serial X wrap P:###### F:#####
•
X indicates which serial port is being tested,
black = standard
1 = optional serial port #1
2 = optional serial port #2
3 = operational serial port #3.
•
F represents the number of times the test has failed or
finished with errors. Initially 00000 is displayed for #####.
The maximum fail count is 99,999.
Note: The power indicator blinks indicating the test is running.
Each time the test finishes, the screen updates with the result. If
the test passes, the pass count increases by 1, however if the
test fails, one of the following failure messages displays for
approximately 3 seconds and the fail count increases by 1:
Receive Status Interrupt
Receive Data Interrupt Error
Transmit Empty Error
Receive Data Ready Error
Framing Error
Overrun Error
Data 232 Error
FIFO Error
DSR PIO Error
CTS Error CTS PIO Error
Once the maximum count is reached the test stops and the final
results display.
3. Press Return/Stop to exit the test.
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Service Manual
Error Status Error
Transmit Data Interrupt Error
Threshold Error
Break Interrupt Error
Parity Error
Data Error
Data 422 Error
DSR Error
DSR Interrupt Error
CTS Interrupt Error