JRC JMR-92 Series Field Service Manual page 869

Marine radar equipment, ecdis conning display
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Symptom
The scanner unit does
not rotate even if the
[Transmit] button is
pressed.
Chapter 7 Troubleshooting
Cause
The internal wiring is faulty.
The CCU (NDC-1590) is faulty.
The connection with the scanner
unit is abnormal.
The safety switch of the scanner
unit is set to OFF.
Power is not supplied from the PSU
to the scanner unit.
The motor driver circuit inside of the
scanner unit is not set correctly.
(NKE-1632, NKE-2632, or
NKE-2632-H is connected as the
scanner unit.)
The rotating part of the scanner unit
is frozen.
7-46
Action
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Check the connection with the
scanner unit.
Set the safety switch of the scanner
unit to ON.
[Note]
For operating the safety switch of the
scanner unit, always request the
work to the specialized service
person. Before starting the work, turn
off the power supply of the display
unit. Otherwise, an unexpected
accident may occur.
Check the power supply wiring
between the PSU and the RIF.
Check the power supply connection
inside of the scanner unit.
[Note]
For checking the wiring inside of the
scanner unit, always request the
work to the specialized service
person. Before starting the work, turn
off the power supply of the display
unit. Otherwise, an unexpected
accident may occur.
Set the motor driver circuit correctly.
[Note]
For setting the motor driver circuit,
always request the work to the
specialized service person. Before
starting the work, turn off the power
supply of the display unit.
Otherwise, an unexpected accident
may occur.
De-freeze the frozen section by using
the neck heater option.

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