75Troubleshooting
015 COMMUNICATION CHECK
CHECK CABLE
1. The line is not active on a twinax interface. Power off the printer. Disconnect the
AC power cord from the printer. Check the twinax host data cable connection and
twinax I/O cable connection at the CT board.
Reseat the twinax host data cable connection and the twinax I/O cable
connection at the CT board.
2. Disconnect the twinax auto-termination cable from the printer. Test the cable for
the resistances shown on page 321.
If resistances are not correct, replace the twinax auto-termination cable.
3. Connect the AC power cable to the printer. Power on the printer. Send a print job
to the printer
. V
erify that all other devices on the twinax line are working properly.
(Refer to line problem determination procedures, as recommended by the host
system.)
If the message is gone, the host has reestablished communication with
the printer. If all other twinax devices work properly and the message still
appears, replace the coax/twinax expansion board. Record the message
and return it with defective board.
016 INVALID COMMAND
1. The printer detects a twinax protocol communications error and reports the error.
Power off the printer. Disconnect the AC power cord from the printer. Check the
twinax host data cable and twinax I/O cable connection at the CT board.
Reseat the twinax host data cable connection and the twinax I/O cable
connection at the CT board.
2. Disconnect the twinax auto-termination cable from the printer. Test the cable for
the resistances shown on page 321.
If resistances are not correct, replace the twinax auto-termination cable.
3. Connect the power cord to the printer. Power on the printer. Send a print job to
the printer.
If the message appears, replace the twinax cable.
4. Send a print job to the printer.
If the message appears, go to Communications Failures, page 133.
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