NT-2000 REF Manual
User-Level Troubleshooting
5-8
5.10. No Message Alarm Output
The following description of the symptom assumes that your NAVTEX receiver was
properly working for some time after initial installation time.
Symptom Suggested Solution
No alarm output is available from
the rear panel ALARM connector.
1. The alarm function for type–A and type–B
messages are initially disabled. To turn it
on, refer to paragraph 4.13.
2. Run the self–diagnostic tests via the steps
in paragraph 4.12, and check the results
of the RAM and ROM tests. If the test
result is “FAILED,” suspect that the CPU
PCB has become faulty. Ask your
dealer/qualified engineer to check the
PCB by replacing.
3. Suspect that some of the connections
to/from the connector have loosened or
the CPU PCB has become faulty. Ask your
dealer/qualified engineer to check the
related wiring harness terminations.
5.11. No External Outputs
The following description of the symptom assumes that your NAVTEX receiver was
properly working for some time after initial installation time.
Symptom Suggested Solution
No messages can be output from
the memory to the printer, to an
INS/IBS system despite correct
connections to the appropriate rear
panel connector.
1. Check to be sure that all ports are enabled
(set to ON). See paragraphs 4.11.1
through 4.11.4 for details.
2. Check to be sure that the communications
protocol of your application matches that
of the port (rear panel connector) in use.
See paragraph 4.11.
3. Check the bit format and baud rate of
your application match those of the port
in use. See paragraph 4.11.
4. Suspect that some of the connections
to/ from the connectors have become
loosened or broken. Ask your dealer/
qualified engineer to check for faulty
wiring harness terminations.
5. Suspect that the CPU PCB has become
defective. Ask your dealer/qualified
engineer to check the PCB first and
replace it if necessary.
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