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No.
Condition of the Breakdown
5
Only noise is displayed and
no radar image is displayed
(characters and markers
are, however, displayed).
6
While radar images are
displayed, the characters
and markers are not
displayed.
7
Reception is poor.
8
The image is warped or
drifts.
9
Nothing happens on the
screen when the fixed
distance marker, variable
distance marker, electronic
cursor or panel lighting
switches are pushed.
10
The screen returns to the
initial state during operation.
11
The alarm does not activate. a. Breakdown in the main control circuit (CMC-1156)
12
The radar wake does not
operate.
13
The display does not
change to true bearing
(north-up) or course up.
Conceivable Cause
a. Modulator (JMA-2343: CME-307, JMA2344: CME-308)
b. Defective magnetron
c. Breakdown in the main control circuit (CMC-1156)
d. Defective tuning voltage
a. Breakdown in the main control circuit (CMC-1156).
a. Deterioration or fault in the magnetron
b. Breakdown in the modulator (JMA-2343: CME-307,
JMA-2344: CME-308). Defect in the pulse width
switching?
c. Breakdown in the receiver (JMA-2343: CAE-457,
JMA-2344: CAE-457-1)
d. Water damage to the radiation unit or cables between
equipment (soiling of the radiation unit, adherence of
ice or snow, internal erosion of the cable between
equipment)
e. Defective tuning voltage
f.
Interruption in the pulse switching signal (PW)
a. Breakdown or defective adjustment of the monitor
b. Interruption in the synchronizing signal for horizontal
signal (HS) and vertical signal (VS)
c. Breakdown in the CRT monitor circuit (CNN-366)
a. The brightness adjustment is at the minimum level.
b. Breakdown in the main control circuit (CMC-1156)
a. The electric power of the ship is inadequate.
b. Breakdown in the main control circuit (CMC-1156)
c. Breakdown in the power supply unit
a. Breakdown in the main control circuit
b. The image brightness is too low.
a. There is no data being received from the bearing
sensor (NMEA).
217
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