IBM 6500-V5P Maintenance Manual - Page 49

Operator Panel Message 015 COMMUNICATION CHECK CHECK CABLE 016 INVALID COMMAND Display Messages Table 3. Message List Explanation Corrective Action The line is not active on a twinax interface. The printer detects a twinax protocol communications error and reports the error. 1. Power off and unplug 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 287. If resistances are not correct, replace the twinax auto-termination cable. 3. Plug in the printer and power it on. Send a print job to the printer. Verify 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 the defective board. 1. Power off and unplug 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 268. If resistances are not correct, replace the twinax auto-termination cable. 3. Plug in the printer and power it on. 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 211. 49