Koden Electronics RB717A Marine Radar RA53 User Manual OME RA5354 4of4

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Date Submitted	2001-08-31 00:00:00
Date Available	2001-10-03 00:00:00
Creation Date	2001-08-31 13:11:51
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Document Author:	109983

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.
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
Inspection Interval
3-6 months
6-12 months
Inspection Item
Rust and looseness in
scanner unit
Display screen of LCD
display
Grease application to
antenna drive gear
Check for contact of
connectors
Antenna motor
brush(RA52/53/54)
Method of Inspection and Maintenance
Check if the scanner’s fitting bolts are corroded.
Clean the filter plate and LCD screen surfaces with a soft
and wet cloth. Avoid organic solvent.
Apply an even coating of grease* to the entire surface of
the antenna drive gear with a spatula or brush.
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.
Check the length of brushes. If the length is less than
6mm, replace both brushes with new one.
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 illumination 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)
81
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.
Cord
A: Top view
Hole
Radome(bottom)
Fixing screw
Cord
Radome(Upper)
Fig. 6-3 Method for replacing fuse
82
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.
For faster service, please let us know about followings when you request repair:
(1) Ship’s name, place of anchorage, allowable repair period or time
(2) Radar type (This radar is RA53 or RA54.)
(3) Manufacturing number (indicated on the back of the display unit)
(4) Fault symptoms and inspection results
WARNING
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.
This chapter explains how to identify trouble locations when the radar is found faulty and how to
request repair.
7.1 Fault Diagnosis by Self-check
The radar incorporates a failure diagnostic function (called "self-check") to diagnose faults by the
equipment itself.
Refer to "5.5.4.4 Fault Diagnosis by Self Check (SYSTEM CHECK)" and check whether there is
any fault in your radar.
83
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.
(4) Video does not appear al- Interconnecting cable is out of
though characters are displayed. place.
(5) Echo image on screen differs Ship’s heading is incorrectly set.
from actual image.
Timing adjustment is incorrectly
set.
(6) Echo images are blurred.
GAIN, STC, or FTC is improperly set.
Magnetron has degraded.
(7) Too much noise.
Radar is not tuned correctly
(8) No response to key pressing.
Corrective action
Connect power cable correctly.
Use Specified power supply.
(See Section 3.2)
Replace fuse. (See Chapter 6)
Use BRIL key to adjust. (See
Section 5.3.)
Contact your dealer.
Use BRIL key to adjust. (See
Section 5.3.
Contact your dealer.
Connect interconnecting cable
correctly.
Set ship’s heading correctly.
(See Section 5.5.4.5.4)
Set timing adjustment correctly.
(See Section 5.5.4.5.4)
Adjust. (See Section 5.3.6 to
5.3.8.)
Contact your dealer.
Adjust TUNE. (See Section
5.5.3.4)
Radar set is not grounded to Connect grounding wire. (See
earth.
Section 3.4 to 3.6.)
Panel keys are not in contact.
Contact your dealer.
Power supply circuit is faulty.
Contact your dealer.
84
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 0.9% of maximum
range of the scale in use, or 8m,
whichever is the greater
Minimum detecting distance:
Within 25 m
Bearing resolution:
Within 2.5° (w/4 ft)
Within 1.8° (w/6 ft)
Bearing accuracy:
1° or less
Warm-up time:
2 minutes
Environment conditions
Ambient temperature range
(S/U):
(D/U):
-25 to 55 °C
0 to 55 °C
93% RH at +40 °C
Humidity:
Vibration:
(S/U):
(D/U):
(S/U):
3 mm( 300 to 500 rpm)
1.2 mm(500 to 1500 rpm)
0.3 mm(1500 to 3000 rpm)
14.7m/s2(1.5G) Resonance test
3 mm(300 to 500 rpm)
0.75 mm(500 to 1500 rpm)
0.2 mm(1500 to 3000 rpm)
100 knots (max.)
IPX-5
IPX-6
(D/U):
(S/U):
100 m in max.
65 dB or less
70 dB or less
(D/U):
Wind resistance:
Waterproof standard:
Interconnecting cable:
Noise:
85
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%)
1.0
12 (-50% to +20%)
P0N, 9410 ± 30 MHz
Radio wave type and frequency:
Antenna revolution: 24 rpm or 48rpm
Transmit/receive switching:
Intermediate frequency:
Circulator and limiter type
60 MHz
(logarithmic amplifier)
Noise figure:
6.5 dB or less
8.3 Display Unit
Type:
RF720A
Indication system:
PPI, PPI+semi-3D,
Split radar range
Indicator:
15-inch color LCD(TFT)
640 x 480 dots
Four(4 ) levels
Cursor Control:
Analog cursor key
and rotary encoder
VRM:
2 lines (One line can be offset.)
Unit of distance can be
selected from NM, KM, and
SM.
EBL:
2 lines (One line can be offset.)
Display modes:
HU, HS, NU, CU, and TM
86
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.
Other functions:
Interference rejection, Zoom,
Sleep mode,
Hold mode, Course error
display,
Parallel cursors, Stern marker,
and Navigation data display
mode
Panel brightness:
4 levels
Language support:
Chinese, Danish, English,
French, German, Greek,
Italian, Japanese, Korean,
Norwegian, Portuguese,
Russian, Spanish, Swedish,
and Turkish
8.4 ATA Unit
The ATA Board Specifications
(1)
Acquisition
Manual
(A target is acquired manually by a cross cursor driven by the Pointing Device.)
(2)
Tracking
Automatic
(3)
Number of tracked targets
10 targets maximum
(4)
ATA data output
(Target Number, distance, bearing, speed, course, CPA and TCPA)
(5)
Alarm
Collision alarm, activated when a target enters the preset CPA and TCPA ranges.
Lost alarm, activated when a target can no longer be tracked.
(6)
Display
Symbols: Predicted point and target number
Vector : Predicted motion of a target as a result of own ship's direction and speed input.
Display modes: Relative (REL)/True (TRUE)
(7)
Tracking range
0.5 to 40 NM
(8)
PRF
2,000 Hz maximum
(9)
Bearing signal
1,080 or 2,048 pulses / rev
(Switched automatically) See
Note.
Note: The ATA board does not accept bearing signals other than specified above. In case the ATA board is
used in the monitor mode display, make sure an incoming bearing pulse rate agrees with that specified in this
specification.
87
8.5 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 serial)
8.6 Standard set
Display unit
Scanner unit
Display cover
Fuse
Interconnecting cable
Power supply cable
M12 hexagonal bolt
1 set
1 (10m)
1 (2m)
4 sets
8.7 Options
Interconnecting cable (15, 20, and 30 m)
Junction box for external connection (with cable 1.5m)
Option connector kit
249J153058
8.8 External dimensions and weight
See APPENDIX
88
8.9 External Connection and function
X1
Connector for Option
pin No.
Name
19
20
NMEA2-A
NMEA2-B
GND
EXBUZ+
EXBUZ-
21
VIDEO_IN
VIDEO_OUT
22
GND
TRIG_IN
23
TRIG_OUT
SHF_IN
24
SHF_OUT
AZI_IN
25
AZI_OUT
26
GND
GYRCK+
GYRCK-
27
10
GYRDT+
GYRDT-
28
11
GND
MARK_I
29
12
30
13
+12V
SIN
COS
REF
31
14
32
-GND
NMEA_OUT
function
NMEA ch2 data input(A)
NMEA ch2 data input(B)
Output for External Buzzer
Output for External Buzzer
controlled ship's power output
Video input for Monitor operation
0 to -1V negative video, Zi = 50ohm
Video output for External Monitor
0 to -1V negative video, Zo = 50ohm
Trigger signal input for Monitor operation
0 to 5V positive pulse, rising edge
Trigger output for External Monitor
0 to 5V positive pulse, rising edge
Heading signal input for Monitor operation
0 to 5V negative pulse, falling edge
Heading signal output for External Monitor
0 to 5V negative pulse, falling edge
Bearing Pulse input for Monitor operation
0 to 5V positive pulse, rising edge
Bearing Pulse output for External Monitor
0 to 5V positive pulse, rising edge
Gyro Interface clock(+) input
Gyro Interface clock(-) input
apply 5V pulse between (+) and (-), isolated
Gyro Interface data(+) input
Gyro Interface data(-) input
apply 5V pulse between (+) and (-), isolated
External Marker signal input, ex) Radar Buoy
negative video, 0 to -1V Zi = 50ohm
External interface power, 100mA max.
Compass Interface for SIN/COS type
Compass Interface for SIN/COS type
Compass Interface for SIN/COS type
SIN/COS signal: SIN = REF+/-1V, COS = REF+/-1V
not used
NMEA data output, ex) MOB data, TARGET data
89
Appendix
1. RA53 General System Diagram
2. RA54 General System Diagram
90
3. Interconnection Diagram
E41-100 PCB (J2): RA53
E41-101 PCB (J2): RA54
POWER PCB (J1)
No. Color
No. Color
Function
17 VIOLET
Function
+250 V
17 VIOLET
+250 V
17 BLUE
+24V
17 YELLOW
GND
34 ORANGE
+12V
34 RED
SHIP’S+
17 YELLOW
GND
34 YELLOW
SHIP’S+
Braid of RED
DAT-R
34 GREEN
SHIP’S-
DISPLAY
RED
DAT
34 BLUE
SHIP’S-
UNIT
NC
BROWN
BP/SHF
Braid of BROWN
BP/SHF-R
V/TRG
11
NC
12 34 RED
SHIP’S+
13 34 YELLOW
SHIP’S+
14 Braid of GRAY
V/TRG-R
15 34 GREEN
SHIP’S-
16 34 BLUE
SHIP’S-
No. Color
17 BLUE
91
SCANNER
UNIT
E41-100 PCB (J1): RA53
E41-101 PCB (J1): RA54
10 GRAY
NC
Function
+24V
NC
34 ORANGE
+12V
Braid of RED
DAT-R
RED
DAT
Braid of BROWN
BP/SHF-R
BROWN
BP/HG
Braid of GRAY
V/TRG-R
GRAY
V/TRG
A
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 .....................................82
ATA..............................................80
ATA alarm...................................80
ATA Data display .......................82
ATA Data output ........................83
ATA setting .................................81
ATA symbol.................................83
Cancel tracking ...........................82
CPA..............................................80
Log signal ....................................84
Ship’s speed.................................83
TCPA ...........................................80
Tracking ......................................81
Heading marker.....................................6
Heading Off (HDG OFF).............37,49
Heading flash (HM FLSH) .........71
Heading angle (HDG) .................25
Hold (HOLD)..........................................73
Off-center (OFF-C) ................................38,54
Option ....................................................93
Language ...............................................73
+MK LINE .............................................51
Menu .....................................................45
Man Over Board (MOB) ........................33
MOB Screen ...........................................65
Monitor mode (MONI)...........................73
Nav (Navigation) Menu.........................52
Navigation screen..................................27
North mark (NORTH M).......................6,71
Bearing ..................................................26
Brilliance................................................28
Buzzer volume .......................................71
Parallel cursor (///CSR) .........................37,49
PPI Screen .............................................63
PPI/NAV Screen ....................................65
PPI/PPI Screen ......................................63
PPI/SEMI3D Screen ..............................63
P TABLE (Pulse table) ..........................72
Changing the setting (CUSTOM) .........68
Course error (XTE) ................................27
Cross cursor (+)......................................26
Display modes (MODE).........................37,52
Radar interference.................................6
Radar screen ..........................................25, 26,27
Range .....................................................30
Range rings (RINGS).............................37,50
Range ring interval.....................50
Reverse display......................................66
EBL .....................................................34,46
Echo expansion (ST) .............................40,57
Echo Menu .............................................56
False echoes ...........................................4
FL VRM2, FL EBL2 ..............................35,47
FTC .....................................................32,57
Semi-3D .................................................42,63
Sleep (SLEEP) .......................................54
Speed (SPD SET) ...................................74
ST'BY .....................................................29
ST'BY screen..........................................71
STC .....................................................32,57
Stern mark (STERN M) ........................71
Switching the screen (SEL WIN)..........41,64
Self check (SYSTEM CHECK) ..............67
Gain .....................................................31,56
Guard zone (GZ) ....................................38,53
Guard zone mode (GZ MODE) ...73
Guard zone level (GZ LVL).........73
92
T
Target (TARGET) ................................. 51
Track (TRACK) ..................................... 40,58
Tune .................................................... 40,57
Tune meter ........................................... 26
VAR RNG .............................................. 37,50
VRM1..................................................... 34,47
VRM unit (VRM UNIT) ........................ 71
Way point (WP)..................................... 27
WP BRG (Bearing of Way point).......... 71
XTE (Course error) ............................... 25,27
ZOOM .................................................... 40,59
93

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Title                           : OME_RA5354_4of4.PDF
Author                          : 109983
Producer                        : Acrobat PDFWriter 4.0 Windows NT

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