AE–1800 Instruction Manual
User-Level Troubleshooting
5.2. No
Message
Reception
–
3/3
Symptom
Suggested Solution
No messages can be received at any
time on the first or the second
receiver with a good replacement
antenna plugged in, but the results of
the self–diagnostic tests are “OK” for
both receivers.
No NAVTEX messages can be received
at any time and anywhere on either
the first or the second receiver after
the antenna is replaced with one
known to be good. The self–diagnostic
tests (paragraph 4.13) show that both
receivers are working properly.
The symptom is an indication that the
antenna circuit has become defective.
1. Replace it with one known to be good.
2. If a correct replacement antenna is not
available, run approx. 5 meters of
insulated wire from the center conductor
of the appropriate connector as a
temporary long wire antenna, and place it
as high as possible from the ground level.
< WA R N I NG >
DO NOT SHORT THE OTHER END OF
THE WIRE ANTENNA TO GROUND, OR
DAMAGE TO THE UNIT’S POWER
SUPPLY WILL RESULT.
3. If replacing the antenna still does not
solve the problem, ask your dealer/
qualified engineer to check the antenna
coupler/selector circuit inside the rear
apron for faulty or broken connections.
No messages can be received at any
time on the first or the second
receiver with a good replacement
antenna plugged in, and the results
of the
*
self–diagnostic tests are
“ FAILED” for both receivers.
*
30 minute warm–up period required
before test.
1. The symptom suggests that either
receiver has got out of alignment. Ask
your dealer/qualified engineer to check
the connections to/from the receiver PCB
and/ or replace the PCB.
2: The Main PCB has also become defective
and/or some of the internal connections to
the PCB have become faulty or broken.
Ask your dealer/ qualified engineer to
check the related wiring harnesses
to/ from the CPU PCB first and to replace
the PCB, if necessary.
5 . 3 . M e s s a g e
St o r ag e
P r o b l em s
Symptom
Suggested Solution
Some stored messages disappear
from memory after some time.
Messages will be erased from memory after
60 hours, unless they are protected from
automatic erasure.
Put the “
PROTECTED
” tag to each desired
message via the steps in paragraph 3.8.
None of the received messages is
stored after power–off.
The symptom indicates that the memory
backup circuit on the CPU PCB is failing. Ask
your dealer or qualified engineer to replace
the CPU PCB.
All messages disappear from
memory after continued power–off
for some time.
The memory retains stored messages for at
least 10 days after power–off. Print out
desired messages using an optional printer
before switching the unit off for extended
periods of time continuously.
