JRC JMA-5212-4/6 Service Manual

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TXRX(AZI)
Description
This message indicates that a rotation signal is not output from the scanner. If the message is
displayed, the radar forcibly stops transmission.
A rotation signal may not be output when the motor is stopped.
First check that the motor is running. If the driving system is protected from strong wind, the
motor is stopped, and the error message may be displayed. In this case, there is no failure, and
transmission can be restarted when the wind has died down.
If the motor is not running, the motor, the relay circuit CSC-656, an equipment cable, or the
power terminal board circuit in the display system may be faulty.
If the motor is running, the encoder or the T/R control circuit CMC-1205R may be faulty.
Location of cause
o
Procedure
Equipment cable in
the scanner unit
x Check the scanner equipment cables.
TB103/TB203 A and B, TB104/TB204 VERR/E, and
TB103/TB202 U1/V1
Power terminal board
circuit CBD-1702A in
the display system
x Check the fuse F3 on the power terminal board circuit CBD-1702A,
and replace it if blown.
x Check the CBD-1702A cable connection. J5002, J5003
Motor in the scanner
unit
x Check the cabling of the motor B101.
x Replace the motor B101.
(The type of motor B101 varies depending on the scanner unit.)
Encoder in the
scanner unit
x Check the cabling of the encoder B102.
x Replace the encoder B102.
(The type of encoder B102 varies depending on the scanner unit.)
CMC-1205R in the
scanner unit
x Check the insertion of J13 on the CMC-1205R.
x Replace the CMC-1205R.
CSC-656 in the
scanner unit
x Check the insertion of each connector on the CSC-656.
x Replace the CSC-656.

JRC JMA-5212-4/6 Specifications

General

Brand	JRC
Model	JMA-5212-4/6
Category	Marine Radar
Language	English