JRC JMA-5212-4, Service Manual

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AIS(Time Out), AIS(Data)
Description
These messages indicate that AIS data cannot be recognized by the AIS processing circuit in the
display system.
If either of the messages is displayed, AIS information cannot be displayed.
The power terminal board circuit in the display system, the AIS processing circuit, or the radar
processing circuit may be faulty.
The baud rate of the serial port for the AIS may not be correct.
A setting may not be made for using the receive port to which the AIS is connected.
There may be no AIS output.
Location of cause
o
Procedure
Power terminal board
circuit CBD-1702A in
the display system
x
Check the CBD-1702A cable connection. J6,J5002,J5003
x
Replace the CBD-1702A.
CDC-1350 in the
display system
x
Check the insertion of J4402 and J4003 on the radar processing
circuit CDC-1350.
x
Check the baud rate in the initial setting menu.
x
In the initial setting menu, check the receive port to be used.
x
Replace the radar processing circuit (CDC-1350) in the processor unit.
AIS Alarm ***
Description
This message indicates that alarm information is included in AIS data received by this radar
equipment. The three asterisks "***" are shown with a 3-digit number indicating an alarm type
(alarm number).
The message is displayed if the AIS unit is faulty.
In response to the message, nothing can be done on the radar equipment. Solve the problem
on the AIS unit. For the alarm number, see the instruction manual of the AIS unit connected.
If the message is displayed, a navigator such as a GYRO or GPS is not connected to the AIS unit
in many cases.
Location of cause
o
Procedure
AIS unit
x
Solve the problem on the AIS unit.