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

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.

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