Additional Ni Information - Digital Equipment VAXstation 3100 Maintenance Manual

56 Troubleshooting
2.21.1 Additional NI Information
When running self-test on the NI circuits, the Ethernet connector on the back of
the system box must be terminated pmperly. If an Ethernet cable is connected
to the enabled Ethernet port, it must be terminated properly. If no cable is
connected to the enabled Ethernet port, put together a loopback connector by
assembling the parts listed in Table 2-14
and connecting it to the enabled port
before running self-test. If the enabled Ethernet port is not terminated properly,
the NI self-test will detect an error of 0000.7001 or higher for the ThinWire
port and 0011.700B for the standard Ethernet port. These termination error
codes indicate a possible problem with the Ethernet cable and not neccessarily
the Ethernet circuits on the system module. If an error still shows up after
replacing the system module and verifying the Ethernet cable, replace the
power supply since ·the 9 Vdc supply is only used by the Ethernet circuits and
a problem with this supply would not show up on any other devices. Appendix
E contains a complete listing of the power-up and self-test error codes and
Appendix F contains a complete
listing of the system exerciser error codes.
Table 2-14 Ethernet Port Loopback Connectors
Item
Standard Ethernet Loopback
ThinWue Ethernet Loopback
T-connector
50 ohm tenninator
12-25869-01
12-26318-01
Number of Parts Needed
1
..
1
2
If power-up testing detects an error with the Ethernet circuits, the SET MOP,
SHOW MOP, SET TRIG, SHOW TRIG, and SET PSWD commands may not
be usable. An error message when entering these commands indicates this.
To re-enable these commands, you must fix the error on the Ethernet circuits.
If the NI error was an unterminated Ethernet port, then you must terminate
the port properly and run TEST 1. Assuming the test passed this time, enter
UNJAM at the console prompt >>> before the SET and SHOW commands
are reenabled for use.