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5-2
5.2 Advanced-level
Troubleshooting
This paragraph describes how to cure hard-
ware 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 op-
eration must be performed by or under the im-
mediate supervision and responsibility of a
person holding an operator certificate contain-
ing a ship radar endorsement.
This is what the U.S. Codes of Federal Regu-
lations 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 Check point and
probable cause
Remedy
Power turned on but radar
does not operate at all.
Control panel is not
illuminated either.
1. Blown fuse F1 or F2
2. Mains voltage/polarity
3. Power Supply Board
4. Illumination lamps
1. Replace blown fuse.
2. Correct wirings and input voltage.
3. Replace Power Supply Board.
4. Replace defective lamps.
CRT brilliance adjusted but
no picture
1. RADAR 1/2 menu settings
2. CRT voltage
3. SPU Board
1. In case of single display install-
ation without radar inter-
switching), make sure RADAR 1
is selected on SYSTEM
SETTING menu.
2. Check high voltage supply with
utmost care.
3. Replace SPU Board.
Antenna not rotating 1. Antenna drive
mechanism (Note that the
message BRG SIG
MISSING appears in
stand-by.)
2. Defective antenna drive
motor relay (thermal
relay K2, 200/220/380,
440/100VAC)
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 atenna switch is on.
Alphanumeric data and
marks are not displayed in
Transmit status.
1. SPU Board 1. Replace SPU Board.