Koden Electronics RB719A Marine Radar RA55 User Manual C18 CHAP7 T Shooting 1
Koden Electronics Co., Ltd Marine Radar RA55 C18 CHAP7 T Shooting 1
Contents
C18
RA51/52/53/54/55 INSTRUCTION MANUAL – 05 69
CHAPTER 7. TROUBLESHOOTING
The first step to take when your radar is not operating properly is to reboot the software.
Press and hold the POWER key for three seconds to turn the unit off. Wait for 15 seconds,
then power on again. If this does not correct the difficulty, then try a master reset. With
the unit turned off, press and hold the FTC and RANGE UP buttons, then press POWER.
When the screen lights up, release two buttons. If the problem persists at this point, con-
tinue with the troubleshooting steps.
There are high voltage circuits inside of this radar. Do not attempt to open
the rear cover of display unit or disassemble internal parts. When you open
the radome for installation, power must be off.
Even if power switch is OFF, this radar is still supplied with power inside.
7.1 Fault Diagnosis by Self-check ___________________________
This radar has a self-check to diagnose equipment faults. If the unit is operable so that you
can access the MENU function, select SETUP>SYSTEM CHECK and press "ENT". Refer
to section 5.5.4.5 - Fault Diagnosis by Self Check (SYSTEM CHECK).
7.2 Troubleshooting System Components
Tab. 7-1 Troubleshooting
Symptom Cause Corrective action
(1) Radar cannot
be powered on. The unit is not receiving power Use a voltmeter to check for power
where the cable is connected to
your boat's power source.
Power supply voltage is off specified
value. Correct voltage to within specified
power range. (See Section 3.2)
Fuse in power cable is blown. Replace fuse. (See Chapter 6)
Brightness is improperly adjusted. Use BRIL key to adjust. (See Sec-
tion 5.3.)
(2) Nothing is dis-
played although
radar is powered
on. LCD is faulty. Contact your dealer.
Brightness is improperly adjusted. Use BRIL key to adjust. (See Sec-
tion 5.3.
(3) Screen is dark.
Backlight is faulty. Contact your dealer.
Scanner interconnecting cable con-
nector is not seated properly Go to system check menu to de-
termine missing signals. Make
sure display set to radar mode (not
monitor mode)
(4) Radar images
do not appear al-
though screen
display is present.
Cable connectors inside radome are
not seated properly Unplug and reattach cable con-
nectors inside scanner
Boat heading is incorrectly set. Set boat heading correctly. (See
Section 5.5.4.6.5)
(5) Echo image on
screen differs from
actual image. Timing adjustment is incorrectly
set. Set timing adjustment correctly.
(See Section 5.5.4.6.5)
GAIN, STC, or FTC is improperly
set. Adjust. (See Section 5.3.6 to 5.3.8.)
(6) Echo images
are blurred. Magnetron has degraded. Contact your dealer.
!
WARNING
70 RA51/52/53/54/55 INSTRUCTION MANUAL – 05
(7) Too much
noise. Radar is not tuned correctly Adjust TUNE. (See Section
5.5.3.4)
Radar is not properly grounded. Connect grounding wire to boat's
bonding or grounding system.
(See Section 3.4 to 3.6.)
(8) No response
when a key is
pressed.
Panel key is not contacting.
Use SYSTEM CHECK to confirm.
(See Section 5.5.4.5) Contact your
dealer.
Power supply circuit is faulty. Contact your dealer.
(9) No NMEA data
present
Incorrect data being transmitted by
talker device. With radar powered off, press and
hold MOB and RANGE UP keys,
then press POWER. When screen
lights up, release two buttons.
Unit will display actual NMEA
data being transmitted. Correct
talker as necessary.