User Manual

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CHAPTER 6. MAINTENANCE AND INSPECTION

A qualified engineer should carry out most of maintenance work on this radar. If your radar set has

any problem, contact your local dealer for repair.

Very High Voltage is present inside the radar set. Do

not attempt to open the display rear cover or dis-

assemble internal module. When you open the ra-

dome, make sure to turn off the main power supply

at switch board.

Even if the radar is switched OFF, the radar set is

still powered with very small amount of current.

The following table shows the maintenance by user. Please check each item periodically.

Tab. 6-1 Maintenance

Articles of consumption

The radar uses the life-limited parts as listed below that require periodic replacement.

(1) Magnetron

This part is used in the scanner unit. If distant echo images have become weak, the

magnetron probably may have degraded. In such a case, you need to replace this item.

Consult your local service agent for replacement.

Practical life to replacement: 3000hour(typ.) (500hour guaranteed by the magnetron

manufacturer)

(2) LCD back-light

This part used in the display unit. If the display screen is extremely dark and its illumi-

nation cannot be corrected by adjusting the screen brightness, the LCD backlighting lamp

may be faulty or may have burnt out. In such a case, you need to replace it. Consult your

local agent for replacement.

Period of the replacement: 15000 hours (typ.) (1000 hours at 0

°C

)

Inspection Interval Inspection Item Method of Inspection and Maintenance

3-6 months Rust and looseness in

scanner unit

Check if the scanner’s fitting bolts are corroded.

Display screen of LCD

display

Clean the filter plate and LCD screen surfaces with a soft

and wet cloth. Avoid organic solvent.

6-12 months Grease application to

antenna drive gear

Apply an even coating of grease* to the entire surface of

the antenna drive gear with a spatula or brush.

Check for contact of

connectors

Check whether connectors are properly connected. If not,

redo connection or make good contact by using a contact

restoring chemical agent or by polishing or replace with a

new one if necessary.

Antenna motor

brush(RA52/53/54)

Check the length of brushes. If the length is less than

6mm, replace both brushes with new one.

WARNING

Summary of content (13 pages)

PAGE 1
CHAPTER 6. MAINTENANCE AND INSPECTION A qualified engineer should carry out most of maintenance work on this radar. If your radar set has any problem, contact your local dealer for repair. ! WARNING Very High Voltage is present inside the radar set. Do not attempt to open the display rear cover or disassemble internal module. When you open the radome, make sure to turn off the main power supply at switch board.
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Power supply cable (3) Fuse The fuse is in-line type, built in to the power supply cable. If the fuse appears to be blown, check the fuse. If blown, replace it following the procedure shown in Fig.6-2. To display unit Push Wire(White) Turn counterclockwise and pull Spring Fuse Replace new fuse Push and turn clockwise Fig. 6-2 Method for replacing fuse Note: Before maintenance of scanner, you can hang a radome (upper) using cord through hole as follows.
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CHAPTER 7. TROUBLESHOOTING This chapter explains how to identify trouble locations when the radar is found faulty and how to request repair. If there is any trouble, press and hold the POWER key for 3 seconds to power off. Then turn on the equipment again and wait 10 sec at least. If you find the radar is faulty, check it by the following procedure described below. If you find as a result of inspection that the fault cannot be repaired on board, contact your distributor for repair.
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7.2 Inspecting Each Part When you have finished self-check, inspect each part of the radar according to Tab.7-1. Tab. 7-1 Troubleshooting Symptom Cause (1) Radar cannot be powered on. Power cable is disconnected. Power supply voltage is outside of specified value Fuse in power cable is blown. (2) Nothing is displayed al- Brightness is improperly adthough radar is powered on. justed. LCD is faulty. (3) Screen is dark. Brightness is improperly adjusted. Backlight is faulty.
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CHAPTER 8. PRODUCT SPECIFICATIONS 8.1 General Type: RA53 and RA54 Power supply voltage and power consumption Power supply voltage: 24Vdc (nominal) (10.2 to 41.6 Vdc) 100 W or less (RA53) 110 W or less (RA54) Power consumption: Distance range: 0.125 to 64 NM, 11 ranges (RA53) 0.125 to 72 NM, 11 ranges (RA54) (Continual variable range also possible) Distance resolution: Within 25 m Distance accuracy: Better than 0.
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8.2 Scanner Unit Type: RB717A (RA53) RB718A (RA54) Antenna type: Slotted-array Antenna characteristics Beam width (horizontal): 1.8° ± 0.2° (with 4ft antenna) 1.2° ± 0.2° (with 6ft antenna) Beam width (vertical): 22° (typ.) Pulse width and peak power output: RA53 Pulse width (µsec) Peak Power (kW) 0.08 6 (-50% to +20%) 0.3 6 (-50% to +20%) 0.6 6 (-50% to +20%) 1.0 6 (-50% to +20%) RA54 Pulse width (µsec) Peak Power (kW) 0.08 12 (-50% to +20%) 0.3 12 (-50% to +20%) 0.6 12 (-50% to +20%) 1.
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Off-center: Can be 100% off-centered over the full range. Guard zone: Can be set at any desired distance and angle in any desired width. IN and OUT modes are available. Stretch: 2 modes Echo track: 15, 30 sec, 1, 3, 6 min. and continuous.
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.5 External Interface NMEA0183: L/L Heading Speed Way point Depth Course error Seawater temperature 2 channels (One standard channel; Optional cable is required for 2nd-channel connections) GGA, GLL, RMA, RMC HDT, HDG, HDM, HSC, VHW, VTG VHW, VTG, RMA, RMC RMB, BEC, BWC, BWR, BER, BPI DBT, DPT RMB, XTE MTW Others (using optional cable): External buzzer control output, Auxiliary indicator connecting signal output and input, Bow direction signal input(SIN/COS signals), and compass interface (10/12 bits se
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8.9 External Connection and function X1 Connector for Option pin No.
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Appendix 1. RA53 General System Diagram 2.
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3. Interconnection Diagram E41-100 PCB (J2): RA53 E41-101 PCB (J2): RA54 POWER PCB (J1) No. Color No.
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A H Adjustment Distance.......................................75 Angle ...........................................76 Tuning .........................................77 Antenna height ...........................78 Automatic gain............................78 Automatic STC............................79 ALL PPI Screen .....................................65 ALL PPI/PPI Screen..............................65 ATA Acquisition ..................................81 All cancel .....................................
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T Target (TARGET) ................................. 51 Track (TRACK) ..................................... 40,58 Tune .................................................... 40,57 Tune meter ........................................... 26 V VAR RNG .............................................. 37,50 VRM1..................................................... 34,47 VRM unit (VRM UNIT) ........................ 71 W Way point (WP)..................................... 27 WP BRG (Bearing of Way point)..........