Lexmark C734dn Service Manual page 189

Serial 1 Wrap
The Serial 1 Wrap Test is used to check the operation of the serial port hardware using a wrap plug. Each serial
signal is tested.
To perform the Serial 1 Wrap Test:
Disconnect the serial interface cable, and install the serial wrap plug.
1.
Select HARDWARE TESTS from the Diagnostics Menu, and press Select (
2.
Select Serial 1 Wrap, and press Select (
3.
The power indicator blinks indicating the test is in progress. The following screens appear
Serial Wrap [x] Testing...
Resetting the
Printer
Upon completion of the POR, the following screen is displayed:
Serial Wrap
P:###### F:####
P:###### represents the number of times the serial port hardware has passed.
Initially, 000000 is displayed. The maximum pass count is 999,999.
F:###### represents the number of times the serial port hardware has failed.
Initially, 0000 is displayed. The maximum fall count is 999,999.
Any of the following explanations for failure may display:
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
•
).
5026
).
Diagnostic aids
3-13
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