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-6.2-
6.2 Advanced-level Troubleshooting
This paragraph describes how to cure hardware and software troubles which should be carried
out by qualified service personnel.
Note: This radar equipment contains complex modules in which fault diagnosis and repair
down to component level are not practicable by users.
Serviceman qualification
All adjustments of radio transmitter during or coinciding with the installation, servicing, or
maintenance which may affect the proper operation must be performed by or under the
immediate supervision and responsibility of a person holding an operator certificate containing
a ship radar endorsement.
This is what the U.S. Codes of Federal Regulations part 80.169 implies (not exact extract).
As such, every administration sets forth its own rule; service personnel must be aware of this
kind of competency requirements.
Service call
When making a service call to your service agent, check S/N and symptom beforehand.
Problem Probable causes or check
points
Remedy
Power turned on but radar does
not operate at all.
Control panel is not illuminated.
1 Blown fuse F1 and F2.
2 Mains voltage/polarity
3 Power supply board
4 Illumination lamps
1 Replace blown fuse.
2 Correct wiring and input voltage.
3 Replace power supply board.
4 Replace defective lamps.
CRT brilliance adjusted but no
picture
1 RADAR 1/2/3 menu
settings
2 CRT high tension
voltage
3 SPU board
1 In case of single display installation
without radar interswitching unit, make
sure RADAR 1 is selected on RADAR 3
menu.
2 Check high tension voltage supply with
utmost care. DANGER.
3 Replace SPU board.
Antenna not rotating 1 Antenna drive
mechanism (note that
the message BRG SIG
MISSING appears in
standby.
2 Defective antenna
drive motor relay
(thermal relay K2,
200/220/380, 440/100
VAC)
3 INT 9170 board.
1 Make sure that there is no short circuit
across #1 and #2 of J461 on IN 9170
board.
2 Press relay reset button.
3 Check that antenna switch is on.