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Chapter 4 Troubleshooting and on-board repair MDC-2900 Series
4-14
0092629012-07
When I/O of CW-376 and
CW-406 are short-circuited
and MENU > OPTION 1 >
BITE > SERIAL TEST is
performed, is
○
displayed?
Is the data format input from
the connectors (J4, J5, and
J6) a proper format?
Is the navigation data (IEC
61162-1) normally input from
the connectors (J4, J5, J6)
and displayed?
When a connector number
to be checked is selected in
the process of MENU >
SYSTEM > BITE > SERIAL
SEL, a sentence of NAV
data input is displayed on
the serial monitor screen?
Is MENU > MAINTENANCE
> I/O > HDG, STW,
COG/SOG, LAT/LON
correctly set?
Set the input settings of HDG, STW,
LAT/LON and COG/SOG correctly.
Logic PCB failure
Select a data format conforming to the
format that receives MENU >
MAINTENANCE > I/O > DETAIL >
FORMAT > IEC 61162-1 or IEC 61162-2.
The external
connecting device
that outputs serial
signal may be faulty.
Is the polarity of signals
(A and B) normal?
Logic PCB failure
Set the polarity normal.
No
No
Yes
No
Yes
No
Yes
No
Yes
Yes
Are the mode display,
positioning status and speed
status in the input sentence
all effective?
Yes
The external connecting device that
outputs serial signal may be unstable.
Check the external connecting device.
No
4.3.2.7 No display of ship’s bearing, speed and latitude/longitude