5. MAINTENANCE, TROUBLESHOOTING
5-6
5.5
Advanced Troubleshooting
This section describes how to cure hardware and software troubles that should be car-
ried out by qualified service personnel.
Advanced troubleshooting
Problem
Probable causes or
check points
Remedy
You cannot turn on the
power.
• Blown fuse.
• Mains voltage/polarity
• Power supply board
• Replace blown fuse.
• Correct wiring and input voltage.
• Replace power supply board.
Power turned on but ra-
dar does not operate at
all.
Panel board
Replace panel board.
Antenna not rotating
• Antenna switch setting (See
the Installation manual.)
• Check for the voltage for mo-
tor.
• Antenna switch of antenna
unit
• Gear mechanism
• RF_TB board
• Check the setting of antenna switch.
• Replace PSU board.
• Check if antenna switch is ON.
• Replace the motor.
• Replace RF_TB board.
Set [GAIN] to maximum
with [STC] and [RAIN]
settings at minimum.
Marks and indications
appear but no noise or
echo.
• IF amplifier
• Signal cable between anten-
na and processor unit
• VIDEO_AMP board
• SPU cable connection on the
VIDEO_AMP board
• Replace IF amplifier.
• Check continuity and isolation of co-
axial cable.
• Replace video amplifier.
Marks, indications and
noise appear but no
echo in short range.
• Magnetron
• Modulator board
• SPU board
• Check magnetron current.
• Replace modulator board.
• Replace SPU board.
Picture not updated or
picture freeze-up.
• Bearing signal generator
• SPU board
• Check that signal cables are fas-
tened.
• Replace SPU board.
• Turn off and on the radar.
GAIN is poor.
Tuning
Do the [TUNE INITIALIZE] setting. See
paragraph 1.8.4.
Radar is correctly tuned
but sensitivity is poor.
• Deteriorated magnetron
• Dirt on radiator face
• Check the magnetron current with the
radar transmitting on 48 nm range.
• Clean radiator.
No picture or malfunc-
tion via the interswitch
of the radars
• LAN cables, hub
• Interswitch network
• Number of connected radars
• Confirm the connection of the LAN
cables and the hub then turn on the
power of the radar.
• Check if some radars have the same
IP address. Change address(es) in
case of duplication.
• Restart all radars on the network.