MDC-2900 Series
Chapter 4 Troubleshooting and on-board repair
0092629012-07
4-21
Is TT in the figure shown
below ON?
TT (ARPA) is abnormal.
At the placing
the cursor on
OFF, and
pushing “ENT”
key, will the
display change
to ON?
Check whether TT
(ARPA) PCB is
present and
connectors are
normally connected.
Go to [4.3.2.7 No
display of ship’s
bearing, speed and
lat/lon] in page 4-14
When cursor is placed on a
target and “ACQ” key is
pushed, is a circle of dotted
line displayed on the
target?
Follow MENU > OS > TGT >
INPUT RNG, set at 20.0 NM.
Thereafter, will the
symbol dotted line circle
for TT turn in solid line
circle, and continue
tracking of the target?
When followed MENU >
OS/TGT > TT > TEST
TGT > ON and the test
target is acquired, will TT
continue tracking?
TT (ARPA) PCB failure
Reset
MENU>MAINTENANCE>
PRESET>TT TGT LEVEL
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
Can the vector of
the target indicate
a stable bearing?
When TRAIL/TRUE/6 min is
set, is the ship’s trail generated
in the angular direction of the
fixed target within 1 degree?
No
No
The interval of
transmission of HDT
may be longer or the
performance of the
compass is not good
enough. Improve the
compass device.
Change STAB to SEA.
Normal
Yes
Yes
Within 1°
Yes
Are HDG and SPD
displayed on screen?
4.3.2.15 TT (ARPA) abnormality
