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Installation Manual
MARINE RADAR MODEL 1622
SAFETY INSTRUCTIONS .......................................................................... i
EQUIPMENT LISTS................................................................................... ii
SYSTEM CONFIGURATION..................................................................... iv
1. INSTALLATION ..................................................................................... 1
1.1 Antenna Unit Installation..................................................................................................... 1
1.2 Display Unit Installation ...................................................................................................... 4
2. WIRING.................................................................................................. 6
2.1 Connections ....................................................................................................................... 6
3. ADJUSTMENTS .................................................................................... 9
3.1 Installation Check ............................................................................................................... 9
3.2 Exchanging Display Unit of Previous Model ....................................................................... 9
3.3 Adjustments........................................................................................................................ 9
3.4 Adjustments for Technicians ..............................................................................................11
3.5 I/O Data Confirmation....................................................................................................... 12
3.6 Restoring Default Settings................................................................................................ 12
OUTLINE DRAWINGS............................................................................D-1
INTERCONNNECTION DIAGRAM .........................................................S-1
SCHEMATIC DIAGRAMS.......................................................................S-2
C
Your Local Agent/Dealer
9-52, Ashihara -cho,
Nishinomiya, Japan
Telephone:
Telefax:
0 7 9 8 - 6 5 - 2111
0798-65-4200
All rights reserved.
Printed in Japan
P U B . N o . I M E -3 4 5 2 0 - F2
( DAMI )
MODEL 1622
FIRST
EDITION
F2
:
:
JUN. 1999
OCT. 7 , 200 2
SAFETY INSTRUCTIONS
WARNING
CAUTION
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
ELECTRICAL
SHOCK
HAZARD
Ground the equipment to
prevent electrical shock and
mutual interference.
Observe the following compass safe
distances to prevent interference to a
magnetic compass:
Only qualified personnel
should work inside the
equipment.
Wear a safety belt and hard
hat when working on the
antenna unit.
Serious injury or death can
result if someone falls from
the radar antenna mast.
Construct a suitable service platform
from which to install the antenna unit.
Serious injury or death can result if someone falls from the radar antenna mast.
Turn off the power at the mains switchboard before beginning the installation.
Fire, electrical shock or serious injury can
result if the power is left on or is applied
while the equipment is being installed.
ⅰ
Standard
compass
Steering
compass
Display
unit
0.65 m
0.5 m
Antenna
unit
1.25 m
0.95 m
EQUIPMENT LISTS
Standard Supply
NAME
TYPE
CODE NO.
QTY
REMARKS
Antenna Unit
RSB-0060-068
−
1
Display Unit
RDP-125-E
−
1
Installation Materials
CP03-16500
000-086-761
CP03-16510
000-086-762
5 m antenna cable
CP03-16520
000-086-763
10 m antenna cable
CP03-16530
000-086-764
15 m antenna cable
CP03-16540
000-086-765
20 m antenna cable
SP03-09800
000-085-441
Spare Parts
1 set
No antenna cable
1 set
Installation Materials
NAME
TYPE
CODE NO.
QTY
REMARKS
Antenna Cable (5 m)
MJ-A10SPF0003-050 000-129-608
Antenna Cable (10 m)
MJ-A10SPF0003-100 000-129-609
Antenna Cable (15 m)
MJ-A10SPF0003-150 000-129-611
Antenna Cable (20 m)
MJ-A10SPF0003-200 000-129-612
Power Cable Assy.
MJ-A3SPF0013-035
000-129-613
1
Connector, fuse, 3.5 m
Hex Head Bolt
M10X25
000-862-308
4
For antenna unit
Dummy Film
03-118-1103-0
100-185-380
1 set
For display unit
Tapping Screw
5X20
000-802-081
4
For display unit
EMI Core
RFC-10
000-141-085
1
For antenna cable
Washer Head Screw
M4X15
000-881-448
1
For antenna cable
Fixing Band
03-146-0101-0
100-277-850
1
For antenna cable
Select one, connector at
both ends
1
ii
Spare Parts
SP03-09800 (000-085-441)
NAME
Fuse
TYPE
CODE NO.
FGBO-A 5A 125 VAC
QTY
000-549-064
2
REMARKS
For display unit
Optional Equipment
NAME
TYPE
CODE NO.
QTY
REMARKS
MJ-A6SPF0003-050
000-117-603
1
Connector at a end, 5 m
MJ-A6SPF0009-100
000-125-236
1
Connector at a end, 10 m
03S9175
000-130-034
1
Connector at one end,
24 V spec. only.
Radome Mounting
Bracket
OP03-93
008-445-080
1
For sailboat
External Buzzer
OP03-136
000-086-443
1
Connector at one end,
1m
PR-62
000-013-484
PR-62
000-013-485
PR-62
000-013-486
220VAC
PR-62
000-013-487
230VAC
Cable Assy.
Antenna Cable Assy.
100VAC
1
110VAC
Rectifier
iii
SYSTEM CONFIGURATION
ANTENNA UNIT
RSB-0060
SIGNAL CABLE (Select one.)
MJ-A10SPF0003-050 (5 m)
MJ-A10SPF0003-100 (10 m)
MJ-A10SPF0003-150 (15 m)
MJ-A10SPF0003-200 (20 m)
03S9175 (30 m, option for 24 VDC only)
NMEA 0183 Cable
MJ-A6SPF0012-050 (5 m)
MJ-A6SPF0012-100 (10 m)
DISPLAY
UNIT
RDP-125
SOUNDER
SIGNAL CABLE ASSY.
MJ-A10SPF0008-XXX
(supplied with FMD-1712)
(1 m)
RECTIFIER
PR-62
NAVIGATOR
(NMEA 0183)
POWER CABLE
MJ-A3SPF0013-035
SHIP'S MAINS
100/110/115/220/230 VAC
SHIP'S MAINS
12/24 VDC
iv
RADAR REMOTE
DISPLAY
FMD-1712
EXTERNAL
BUZZER
OP03-136
Options shown with
dashed lines.
1. INSTALLATION
Mounting on a platform
1.1 Antenna Unit
Installation
1.
Mounting considerations
When selecting a mounting location for the
antenna unit keep in mind the following points.
• Install the antenna unit on the hardtop, radar
arch or on a mast on an appropriate platform.
(For sailboats, a mounting bracket is
optionally available.) It should be placed
where there is a good all-round view with, as
far as possible, no part of the ship’s
superstructure or rigging intercepting the
scanning beam. Any obstruction will cause
shadow and blind sectors. A mast, for
instance, with a diameter considerably less
than the width of the antenna unit, will cause
only a small blind sector. However, a
horizontal spreader or crosstrees in the same
horizontal plane would be a much more
serious obstruction; place the antenna unit
well above or below it.
Antenna unit mounted
on top of wheelhouse
Remove mounting hardware at the bottom
of the antenna unit; four each of hex bolts
(M10X20), spring washers and flat washers.
Save mounting hardware to use it to fix the
antenna unit to the mounting platform later
on.
Screws
one screw on other side
Flat washer
Spring washer
Hex bolt (M10 x 20)
Figure 2 Antenna unit, showing location of
mounting hardware
Antenna unit
fixed to mast
2.
Unfasten three screws to remove the cover.
3.
Construct a platform (wood, steel, or
aluminum) of 5–10 mm in thickness whose
dimensions are as shown in Figure 4.
Fasten the platform to the mounting
location. Next, position the base so the
cable entrance faces the stern direction and
the vent tube is extending downward
through the hole for the vent tube.
Note: When drilling holes in the platform, be
sure they are parallel with the fore and aft
line.
Figure 1 Typical antenna unit placement on
powerboat and sailboat
210
• In order to minimize the chance of picking up
electrical interference, avoid where possible
routing the antenna cable near other
electrical equipment onboard. Also avoid
running the cable in parallel with power
cables.
160
130
Fixing Hole
(φ11mm)
160
210
• The compass safe distance of 1.25 meters
(standard compass) and 0.95 meters
(steering compass) should be observed to
prevent deviation of the magnetic compass.
MOUNTING
PLATFORM
(Local Supply)
Hole for Vent Tube
(φ20mm)
Bow
Figure 3 Dimensions of antenna platform
1
4.
6.
Using the hex bolts, flat washers and spring
washers removed at step 1, fasten the base
to the platform. The torque should be
between 19.6-24.5 N•m.
Unfasten 11 screws to dismount the shield
plate.
Shield Plate
Note: Longer hex bolts (M10X25) are
supplied with the installation materials. Use
them instead of the hex bolts removed
earlier if the mounting platform is very thick.
Transceiver
module
Antenna base
assy.
Discard screw
marked with .
5-10
mm
Figure 6 Antenna unit, inside view
Flat
washer
Spring
washer
7.
Platform
Hex bolt
(M10 x 25
or M10 x 20)
Pass the antenna cable with connector
through the gasket and cable clamp, and
then tighten cable gland.
Be sure the shrink tubing on the antenna
cable is not covered by the gasket.
Figure 4 How to fasten the base to platform
5.
Unfasten the cable of the rotation detector
from the cable clamp.
Rubber
Gasket
Rotation detector
Cable clamp
Gasket
Cable Gland
Figure 7 Antenna unit, inside view
8.
Referring to Figure 8, fasten the shield
cable to a screw (M4x 10) on the chassis to
ground the unit.
Caution
Connect 9 pin
connector
here (J801).
Figure 5 Antenna unit, inside view
Connect
shield here.
Figure 8 How to connect the antenna cable
to the antenna unit
Caution: Be careful not to pinch the
rotation detector cable when remounting
the shield plate.
2
9. Attach EMI Core (supplied) to antenna cable.
Set the fixing band to the EMI core.
Mounting using the optional
mounting bracket
A mounting bracket for fastening the antenna
unit to a mast on a sailboat is optionally
available (Type OP03-93, Code No.008-445080).
Fixing band
This bend should be
facing toward you.
Figure 9 Fixing band
10. Referring to Figure 8, connect the 9-pin
connector of the antenna cable to J801.
11. Refasten the shield plate with 10 screws. Be
sure not to pinch cable from the rotation
detector with the shield plate. See “Caution”
in Figure 5 for details.
12. Fasten the Fixing band with Screw
(supplied).
Name
Type
Code No.
Qty
Hex. bolt
M4X12
000-804-725
4
Hex. bolt
M8X20
000-805-707
8
Mounting
plate
03-0189001-0
100-206-740
1
Support
plate (1)
03-0189005-0
100-206-780
1
Support
plate (2)
03-0189006-0
100-206-790
1
Bracket (1)
03-0289101-0
100-206-810
1
Bracket (2)
03-0289102-0
100-206-820
1
Fixing plate
03-0289103-0
100-206-830
2
Screw(M4X15)
Fixing
Band EMI Core
Align bend with
corner of chassis.
Figure 10 How to fix the EMI Core
13. Confirm that the rubber gasket is properly
positioned and then tighten the fixing screws
for the cover. Refer to Figure 7 for
positioning of rubber gasket.
3
1.2 Display Unit
Installation
1. Remove mounting hardware at the bottom of
the antenna base. You may discard the
hardware. Assemble the mounting bracket
and fasten it to a mast. Fasten the antenna
unit to the bracket.
Mounting considerations
When selecting a mounting location for the
display unit keep in mind the following points.
• Locate the display unit in a position where
you can view and operate it conveniently.
Mounting plate
Fixing plate
Bracket (2)
• The orientation of the display unit should be
so the radar screen is viewed while the
operator is facing in the direction of the bow.
This makes determination of your position
much easier.
Bracket (1)
Support
plate (2)
• The display unit is designed and constructed
to be splashproof, thus it can be installed
outdoors. If it is to be installed outdoors, we
recommend installing it an enclosed cabinet,
for maximum protection against the marine
environment.
Support
plate (1)
• Even though the picture is quite legible even
in bright sunlight, keep the display unit out of
direct sunlight or at least shaded because of
heat that can build up inside the cabinet.
• The temperature and humidity of the
mounting location should be stable and
moderate. No LCD can provide adequate
contrast if the ambient temperature is too low
or too high.
• Make sure you allow enough clearance both
to get to the connectors behind the unit and
to allow you to get your hands in on both
sides to loosen or tighten the mounting
knobs. Make sure you leave at least a foot or
so of "service loop" in cables behind the unit
for servicing or easy removal of the
connectors.
• The compass safe distance of 0.65 meters
(standard compass) and 0.5 meters (steering
compass) should be observed to prevent
deviation of the magnetic compass.
Figure 11 How to assemble and mount the
optional mounting bracket
2.
Refer to previous steps 4-12 in "Mounting
on a platform".
4
2.
Mounting
3. Cover the unused bolt holes with the
dummy films supplied.
The display unit can be mounted on a tabletop,
the overhead, or flush mounted in a panel.
4.
Install the display unit in the hanger.
Tighten the knob bolts securely.
Fix the hanger to the mounting location with
four tapping screws (supplied).
OVERHEAD MOUNT
182
DUMMY FILM
Cover unused
knob bolt holes
with dummy film
(supplied).
TABLETOP
MOUNT
188
4-φ6
FIXING
HOLES
HANGER
KNOB
BOLT
80
93
*150
190
* SERVICE
CLEARANCE
70
12
11
All dimensions
in millimeters
174
180
1.
Fit the knob bolts to the display unit.
CUTOUT SIZE
FOR PANEL
MOUNTING
Figure 12 Mounting dimensions of display unit
5
2. WIRING
Connection of external
equipment
2.1 Connections
Connect the antenna cable, the power cable
and the ground wire as shown in Figure 13.
Navigator/echosounder
This radar can receive the following NMEA 0183
format data sentences from a navigator or
echosounder:
ANTENNA CABLE
ANTENNA UNIT
GLL:
BWR:
DISPLAY UNIT
BWC:
GLC:
GTD:
RMA:
NMEA
DJ-1
10.2-31.0VDC
1
3GND
RMB:
POWER CABLE
2
RMC:
FUSE (5 A)
VTG:
MTW:
DBT:
DBS:
DPT:
GGA:
;;;;;;;;;
;;;;;;;;;
BLK (-)
WHT (+)
GROUND
Connect ground
wire to bolt fastened
(or welded) to hull.
POWER SUPPLY
12/24 VDC
Figure 13 Connections
6
Geographic position - Lat/Long
Bearing and Distance to Waypoint Rhumb line
Bearing and Distance to Waypoint
Geographic Position - Loran-C
Geographic Position - Time Difference
Recommended Minimum Specific
Loran-C Data
Recommended Minimum Navigation
Information
Recommended Minimum Specific
GPS/Transit Data
Track Made Good and Ground Speed
Water Temperature
Depth Below Transducer
Depth Below Surface
Depth
GPS - Rx status, L/L
NMEA connection
You will need an NMEA cable to connect a video sounder or a navigator. Connect it to the NMEA
connector at the rear of the radar display unit as shown below.
NMEA
DJ-1
10.2-31.0VDC
1
MJ-A6SPF0012-050/100
(option of external equipment)
3GND
2
To navigator or NMEA
output of video sounder
Figure 14 Navigator connection
Note: Do not use a cross wiring-type NMEA cable which has connectors at both ends (for example,
MJ-A6SPF0012-050). Miswiring can result when the one of the connectors is removed to make the
connection.
To connect both a video sounder and a navigator, use NMEA cable MJA6SPF0003-050/MJA6SPF0009-100 (option) and solder them as shown below.
Note 1: Tape cables to prevent short.
Note 2: You may cut a NMEA cable which has connectors at both ends. However, do not modify
waterproof connector of NMEA cable.
MJ-A6SPF0003-050
MJ-A6SPF0009-100
WHT
BLK
YEL
GRN
SHIELD
Navigator
Video
Sounder
MJ-A6SPF0003-050
MJ-A6SPF0009-100
MODEL1622
MJ-A6SPF0003-050
MJ-A6SPF0009-100
WHT
BLK
YEL
GRN
SHIELD
WHT
BLK
YEL
GRN
SHIELD
1
2
3
4
6
NMEA
RD1-H
RD1-C
RD2-H
RD2-C
GND
After soldering, wrap
with self-vulcanizing tape.
Figure 15 Connection of video sounder and navigator cables
To connect equipment whose NMEA output uses other than a FURUNO 6 pin NMEA connector, use
NMEA cable type MJ-A6SPF0003-050/MJ-A6SPF0009-100 to make the connection.
NMEA OUTPUT
TX-H
Navigator TX-C
GND
NMEA OUTPUT
TX-H
Video
TX-C
Sounder
GND
MODEL1622
MJ-A6SPF0003-050
MJ-A6SPF0009-100
WHT
BLK
YEL
GRN
SHIELD
1
2
3
4
6
NMEA
RD1-H
RD1-C
RD2-H
RD2-C
GND
After soldering, wrap
with self-vulcanizing tape.
Figure 16 Connection of video sounder and navigator cables using NMEA cable type
MJ-A6SPF0003-050/MJ-A6SPF0009-100
7
External Buzzer
Make a hole of φ16
here. Seal hole with
sealing compound
after connecting cable.
External buzzer
Access J6 on the DU Board as shown in Figure
16. Plug in the connector of the external buzzer
at J6. Seal the hole with sealing compound. Fix
the buzzer by two tapping screws.
External buzzer
Type: OP03-136
Code No.: 000-086-443
NMEA
J6 located at right
side of shield case
under the rear panel.
DJ-1
60 mm
10.2-31.0VDC
1
3GND
2
50 mm
Note: Use hammer and appropriate
metal rod to make hole.
Figure 18 Display unit, rear view
2-φ3.5
Figure 17 External buzzer
8
3. ADJUSTMENTS
3.1 Installation Check
2. Select MODEL by ▲.
M1622: 1 minute.
M1621/M2: 1minute and 30 seconds.
After installing the system it is a good idea to
check it for proper installation, following the
checklist provided below.
•
•
•
3. Select M1621/M2 by 4.
Cable gland is facing toward the stern.
4.
Four fixing bolts securing the antenna unit
are securely tightened.
Press the [MENU] key to close the menu.
3.3 Adjustments
The antenna cable is waterproofed at the
base of the antenna unit.
Do the following in order to adjust the radar.
The antenna cable is securely retained
against the mast or mounting and is free of
interference from running rigging.
1) Adjustment of picture
•
The cable gland on the deck or bulkhead is
waterproofed, if provided.
•
Connectors of external equipment are
securely plugged into the radar display unit.
1. Press the [POWER] key on the display unit.
The display should light. In approximately
one minute, ST-BY appears at the screen
center.
•
•
2.
When ST-BY appears press the [TX] key.
The radar will start transmitting, and you
will probably see some targets, even
though the radar is not yet properly
adjusted.
3.
Adjust the sensitivity to display a small
amount of noise on the screen.
4.
Press the [–] key several times to select
the minimum range. Adjust the STC to
display nearby radar targets clearly on the
screen. Too much STC action will eliminate
small targets, and too little STC action will
cause the screen to be so full of targets
and noise that it is hard to determine which
target is which as compared to visual
sightings.
The power connections to the battery are of
correct polarity.
3.2 Exchanging Display
Unit of Previous
Model
When exchanging the display unit of the
MODEL 1621/1621 MARK-2 with that of the
MODEL 1622, it is necessary to maintain the
magnetron warmup time. This should be done
with the radar in stand-by.
1. Press ▲ and ▼ together for about 10
seconds to show the display shown in
Figure 19.
You have mounted the antenna unit facing
straight ahead in the direction of the bow.
Therefore, a small but conspicuous target dead
ahead visually should appear on the heading
mark (zero degrees).
▲
SEL MENU
BY / KEY
▲
PROGRAM NO
03591610XX
2) Heading alignment
1 MODEL
M1622 M1621/M2
2 DISPLAY MAIN
DEMO
NAV DATA (NMEA 0183)
GLL
BWR BWC GLC
RMA RMG RMC VTG
DBT DBS
DPT GGA
In practice, you will probably observe some
small error on the display because of the
difficulty in achieving accurate initial positioning
of the antenna unit. The following adjustment
will compensate for this error, up to ±30
degrees.
GTD
MTW
Figure 19 Maintenance menu
9
1. Identify a suitable target (for example, ship
or buoy) at a range between 0.125 to 0.25
miles, preferably near the heading mark. To
minimize error, keep echoes in the outer
half of the picture by changing the range.
0.25 NM
.125
Target
Heading
marker
Press and hold down !and " together
(about 10 seconds) to display the
installation menu.
2.
SEL MENU
BY ▼/▲ KEY
Menu
TOTAL ON TIME
00000 : 00
TOTAL TX TIME
00000 : 00
1. ADJ HDG
2. ADJ TMG
3. NM/KM
TUNE
▲
▲
ADJUST PICTURE ORIENTATION
USING / KEYS SO THAT
HEADING MARK BISECTS TARGET
LOCATED DEAD AHEAD.
Total hrs radar
has been on
Total hrs radar
has been transmitted
WP- - -. - -° M
- - -. - - NM
Tuning bar
(for technicians)
CSE
- - -. - -° M
- ° - -. - - N
- - - ° - -. - - E
LL -
Instructions for item selected appears here.
(example: heading adjustment)
SPD
- -. - KT
9.4°
0.015 NM
Figure 20 Installation menu
3.
Figure 22 How to adjust heading
Select ADJ HDG. Your display should now
look something like the one shown in
Figure 21.
6.
0.25 NM
.125
30°
As a final test, move the boat towards a
small buoy and confirm that the buoy
shows up dead ahead on the radar when it
is visually dead ahead.
30°
3) Sweep timing
SEL MENU
BY ▼/▲ KEY
1. ADJ HDG
2. ADJ TMG
3. NM/KM
This adjustment ensures proper radar
performance, especially on short ranges. The
radar measures the time required for a
transmitted echo to travel to the target and
return to the source. The received echo
appears on the display based on this time. Thus,
at the instant the transmitter is fired, the sweep
should start from the center of the display
(sometimes called sweep origin.)
TOTAL ON TIME
00000 : 00
TOTAL TX TIME
00000 : 00
A trigger pulse generated in the display unit
goes to the antenna unit through the antenna
cable to trigger the transmitter (magnetron).
The time taken by the signal to travel up to the
antenna unit varies, depending largely on the
length of signal cable. During this period the
display unit should wait before starting the
sweep. When the display unit is not adjusted
correctly, the echoes from a straight local object
(for example, a harbor wall or straight pier) will
not appear with straight edges – namely, they
will be seen as pushed out or pulled in near the
picture center. The range of objects will also be
incorrectly shown.
TUNE
▲
▲
ADJUST PICTURE ORIENTATION
USING / KEYS SO THAT
HEADING MARK BISECTS TARGET
LOCATED DEAD AHEAD.
Figure 21 Display for adjustment of heading
4. Press !or" to bisect the target selected at
step 1 with the heading marker.
5. Press MENU.
10
4) Unit of range measurement for
VRM and cursor
The unit of range measurement for the VRM
and the cursor may be selected to nautical mile
or kilometers as follows:
Correct
Target pushed
inward
1.
Target pushed
outward
SEL MENU
BY ▼/▲ KEY
Figure 23 Examples of improper and
correct sweep timings
1.
Transmit the radar on a range between
0.125 and 0.5 nm and adjust the sensitivity
and STC.
2.
Visually select a straight echo (harbor wall,
straight pier).
3.
Select ADJ TMG on the menu.
SEL MENU
BY ▼/▲ KEY
1. ADJ HDG
2. ADJ TMG
3. NM/KM
Select NM/KM on the menu.
1. ADJ HDG
2. ADJ TMG
3. NM/KM
TOTAL ON TIME
00000 : 00
TOTAL TX TIME
00000 : 00
TUNE
(RANGE UNIT)
PRESS t/u KEYS TO SELECT
NAUTICAL MILE OR KILOMETER
AS THE UNIT OF RANGE.
Figure 25 Installation menu, NM/KM selected
TOTAL ON TIME
00000 : 00
TOTAL TX TIME
00000 : 00
2.
Select unit of range desired.
3. Press the [MENU] key to close the
installation menu.
TUNE
IDENTIFY STRAIGHT TARGET
SUCH AS BREAKWATER. MAKE
ITS ECHO STRAIGHT ON SCREEN
BY USING t/u KEYS.
3.4 Adjustments for
Technicians
Figure 24 Installation menu, ADJ TMG selected
1) Magnetron heater voltage
4.
Magnetron heater voltage is formed at the MD
Board of the antenna unit and preadjusted at
the factory for use with any length of signal
cable. Therefore no adjustment is required.
However, verify heater voltage as follows:
While looking at the target selected at step
2, straighten it by pressing ! if it is pulled
inward, or " if it is pushed outward.
Note: Turn the power on when measuring
magnetron heater voltage.
1.
Dismount the shield plate.
MD board under
the shield plate
Figure 26 MD board
11
2.
Turn on the power. Do not transmit the
radar.
3.5 I/O Data Confirmation
3.
Connect a multimeter, set to 10 V DC
range, between #6(+) and #4(-) of test
point TP804 on the MD Board in the
antenna unit.
4.
Confirm that the multimeter shows 8.0 V
±0.1 V. If it does not, adjust potentiometer
VR801 on the MD Board.
You can confirm NMEA input from a navigator
or echosounder. Follow the procedure shown in
2) Radar function to display the maintenance
menu. NMEA sentences being input are shown
in reverse video.
3.6 Restoring Default
Settings
VR851
All default menu settings can be restored by
turning on the power while pressing and holding
down [MENU] and &.
VR801
TP804
Figure 27 Antenna unit, inside view
2) Radar function
This radar can function as the main radar or a
demonstration model. displaying internally
generated radar echoes.
1.
Set the radar in stand-by.
2.
Press and hold down ▲ and ▼ together
(about 10 seconds) to display the
maintenance menu.
▲
SEL MENU
BY / KEY
▲
PROGRAM NO
03591610XX
1 MODEL
M1622 M1621/M2
2 DISPLAY MAIN
DEMO
NAV DATA (NMEA 0183)
GLL
BWR BWC GLC
RMA RMG RMC VTG
DBT DBS
DPT GGA
GTD
MTW
Figure 28 Maintenance menu
3.
Select MAIN or DEMO from the DISPLAY
field. (MAIN, Main radar display, DEMO,
demonstration display.)
4.
Press the [MENU] to close the menu.
Note: Disconnect the antenna cable to use
as demonstration model.
12
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