User's Manual

Chapter 4 Maintenance MDC-2000A Series
4-5 0093120007-01
4.4.4 Inspection at Each Location
After finishing the inspection by the self-diagnosis, according to the table, check each location of the
radar.
Trouble conditions Suspected causes of troubles Countermeasures
The radar cannot be
powered.
The power cable is not connected. Connect the power cable and fix the
connector firmly.
The power voltage is out of the
specified range.
Use the appropriate power.
The main power fuse blew out. Replace the fuse with a new one.
The radar can be
powered. But,
nothing is displayed
on the screen.
The screen brightness adjustment
is set to the minimal value.
Adjust the brightness with the [ ]
key.
Defect of the LCD unit Request the repair.
Defect of the LCD drive circuit Request the repair.
The screen is dark. The screen brightness adjustment
is not properly performed
Adjust the brightness with the [ ]
key.
Defect of the backlight Request the repair.
The character
information can be
displayed. But, the
image of the radar
cannot be displayed.
The mutual connection cable is
not connected.
Connect correctly the mutual
connection cable.
Detuned. Re-adjust.
Refer to Tune Select in 3.3 setting
of Adjustment Items.
Defect of the transmission
equipment
Request the repair.
The target image is
different from the
actual one.
The heading is not correctly set. Set the heading.
Refer to Bearing Setting in 3.3
Setting of Adjustment Items.
The distance adjustment is not
properly set.
Set correctly the TX delay adjustment.
Refer to TX Delay in 3.3 Setting of
Adjustment Items.
The image is weak. The set value of the gain is low. Rotate clockwise the [GAIN] knob to
display an image.
The setting defect of STC or FTC. Re-adjust.
Refer to 1.8 STC Adjustment or
2.2 FTC Adjustment.
Detuned. Re-adjust.
Refer to Tune Select in 3.3 Setting
of Adjustment Items.
Defect of the magnetron or MIC
(front end)
Request the repair.
Too much noise Detuned. Re-adjust.
Refer to Tune Select in 3.3 Setting
of Adjustment Items.
The radar is not grounded. Connect the ground wire.
The antenna does
not rotate.
The power is not fed to the motor. Check the connection of the motor
power.
The motor brush is worn. Replace the motor brush with a new
one.
BRILL
BRILL