PACKING LIST
OUTLINE DRAWINGS
INTERCONNECTION DIAGRAM
SCHEMATIC DIAGRAMS
Declaration of Conform it y
18
................21
i
SAFETY INSTRUCTIONS
Safety Instructions for the Operator
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
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.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
Turn off the power immediately if water
leaks into the equipment or the equipment is emitting smoke or fire.
Continued use of the equipment can cause
fire or electrical shock.
Safety Instructions for the Installer
WARNING
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
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.
Be sure that the power supply is
compatible with the voltage rating of
the equipment.
Connection of an incorrect power supply
can cause fire or damage the equipment.
CAUTION
Use the proper fuse.
Use of a wrong fuse can damage the
equipment and void the warranty.
Use only the specified power cable.
Fire or damage to the equipment can result
if a different cable is used.
CAUTION
WARNING LABEL
A warning label is attached to the
equipment. Do not remove the label.
If the label is missing or damaged,
contact a FURUNO agent or dealer
about replacement.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
Observe the following compass safe
distances to prevent interference to a
magnetic compass:
Standard Steering
compass compass
Display
unit
Antenna
unit
0.50 m 0.30 m
1.25 m 0.95 m
FOREWORD
A Word to the Owner of the
MODEL 1623
Congratulations on your choice of the
FURUNO MODEL 1623 Marine Radar.
For over 50 years FURUNO Electric
Company has enjoyed an enviable reputation
for innovative and dependable marine
electronics equipment. This dedication t o
excellence is furthered by our extensive
global network of agents and dealers.
Your radar is designed and constructed to
meet the rigorous demands of t he marine
environment. However, no machine can
perform its intended function unless installed,
operated and maintained properly. Please
carefully read and follow the recommended
procedures for installation, operat ion, and
maintenance.
We would appreciate hearing from you, the
end-user, about whether we are achieving our
purposes.
Thank you for considering and purchasing
FURUNO equipment.
Features
Your radar has a large variety of functions, all
contained in a rugged plastic case. All
controls respond immediately to the
operator’s command and each time a key is
pressed the corresponding change can be
seen on the screen.
The main features of the MODEL 1623 are
Daylight viewing radar specially designed
•
for small craft and sailing yachts.
Traditional FURUNO reliability and quality
•
in a compact, light-weight and low-cost
radar.
Compact and light-weight radome
•
antenna with precision 38 cm center-fed
radiator.
High definition 6-inch monochrome LCD
•
display.
Automatic control of sensitivity (gain),
•
tuning and A/C SEA for sim plified
operation.
Targets can be displayed in grey tones on
•
a white background or vice versa, for
optimal viewing under any lighting
conditions.
Place your thumbs at the center of the cover, and then lift the cover while
pressing it with your thumbs.
1
1.2 Indications
Range
Range ring
interval
Zoom
Watchman
1.5
nm
0.5
ZOOM
WATCH
SIM
Simulation mode
TRAIL
G(IN)
ES H
IR H
FTC
1. OPERATION
Echo trails
Guard alarm (IN or OUT)
Echo stretch
Interference rejector
Rain clutter suppressor
Guard
zone
Cursor
VRM
EBL bearing
VRM range
Position
Speed Course
5.0 kt 135°
EBL
VRM
45.0°
1.25
nm
RNG 0.62nm
BRG 283.2°
TTG 0H7M
34°44.135 N
135°44.135 E
EBL
Heading line
Range rings
Nav data
(Requires appropriate
sensors.)
Range, bearing and
time-to-go to cursor
location
(Cursor latitude and
longitude position
also available if radar
is interfaced with
a navigator.)
Indications
About the LCD
This high quality LCD displays better than 99.9% of its picture elements. The remaining 0. 01%
may drop out or light, however this is not an indication of malfunction; it is characteristic of the
LCD.
2
1. OPERATION
1.3 Turning Power On/Off
Press the [POWER/BRILL] key to turn on the
power. The unit beeps, the startup screen
appears, and then the equipment checks t he
ROM and RAM for proper operation and
displays program number. The ROM and
RAM check shows OK or NG (No Good). If
NG appears, try to press any key except the
[POWER/BRILL] key to start operation.
However, the equipment may not work
properly. Contact your dealer for advice.
6" LCD MARINE RADAR
MODEL1623
FURUNO ELECTRIC CO., LTD.
ROM : OK RAM : OK
Program No: 0359183-XX.XX
XX.XX = Program version no.
Startup screen
After the completion of t he startup test, a
timer displays the time remaining for warm up
of the magnetron (t he device which transmits
radar pulses), counting down from 1: 00 t o
0:00.
To turn off the power, press and hold down
the [POWER/BRILL] key until the screen
goes blank. The time re m aining until power is
turned off is counted down on the screen.
Note 1: In a cold environment the screen
appears “foggy” when the power is turned on
but is soon restored to normal condition.
Note 2: The example screens shown in this
manual may not match the screens you see
on your display. The screen you see depends
on your system configuration and equipment
settings.
1.4 Transmitting, Standby
After the power is turned on and the
magnetron has warmed up, “ST-BY”
(Standby) appears, indicating the radar is
ready to transmit radar pulses.
To toggle between transmit and standby, do
the following:
1. Press the [POWER/BRILL] key
momentarily to show the
brilliance/contrast adjustment window.
BRILL/CONTRAST
LOW HIGH
CONT: 4
LOW HIGH
BRILL:
[MODE]: TX/ST-BY
[MENU/ESC] : Exit.
Brilliance/contrast adjustment window
2. Press the [MODE] key to go to standby
and transmit alternately.
Note: If you attempt to transmit before
“ST-BY” appears, the buzzer sounds and
the radar does not transmit pulses. Wait
until “ST-BY” appears.
3. Press the [MENU/ESC] key to close t he
window.
When radar pulses ar e transmitted the radar
receive is automatically tuned. Echoes
appear in four levels of digitized video
according to echo strength. When a target is
beneath a marker (VRM, EBL, heading line,
range ring) the part of the marker where the
target lies is displayed in reverse video.
9
3
1. OPERATION
1.5 Adjusting Display
Contrast, Brilliance
1. Press the [POWER/BRILL] key
momentarily to show the
brilliance/contrast adjustment window.
BRILL/CONTRAST
LOW HIGH
CONT: 4
LOW HIGH
BRILL:
[MODE]: TX/ST-BY
[MENU/ESC] : Exit.
9
Brilliance/contrast adjustment w indow
2. Press ◄ or ► to adjust contrast.
3. Press ▲ or ▼ to adjust brilliance.
4. Press the [MENU/ESC] key to escape.
Note 1: Windows other t han m enu windows
are erased when there is no operation within
about 10 seconds.
Note 2: W hen t he power is reapplied after
turning off the eq uipm ent with minimum
brilliance, the radar starts up with minimum
brilliance, after the start up screen appears.
Adjust the brilliance as necessary.
1.6 Choosing the Range
The range selected automatically determ ines
the range ring interval, the number of range
rings and pulse repetition rate.
Press the [RANGE+] or [RANGE-] key to
select a range. The range and r ange ring
interval appear at the top left corner on the
screen.
Range
Range ring
6.0
2.0
nm
interval
EBL
- - - .-°
VRM - - - -nm
RNG 03.2nm
BRG 60.2°
TTG 02H21M
Location of range and range ring
interval indications
1.7 Receiver Sensitivity
The [GAIN] key adjusts t he sensitivity (gain)
of the receiver. It works in precisely the same
manner as the volume control of a broadcast
receiver, amplifying the signals received.
The sensitivity is adjusted automatically
according to sea conditions, and you may
also further adjust it manually to fine tune.
The proper setting is such that the
background noise is just visible on the
screen.
If you set up for too lit t le sensit ivity, weak
echoes may be missed. On the other hand
excessive sensitivity yields too much
background noise; weak target s m ay be
missed because of the poor contrast between
desired echoes and the background noise on
the display.
1. Press the [GAIN] key consecutively until
the display shown below appears.
GAIN
AUTO : MODERATE
MANU
[GAIN] : A/C SEA MENU
[MENU/ESC] : Exit.
20
Gain adjustment window
4
1. OPERATION
2. Press ▲ or ▼ to choose AUTO or MANU
as appropriate.
Automatic gain adjustment
a) Press ► to open the automatic gain
options window.
ROUGH
MODERATE
CALM
Automatic gain options
b) Press ▲ or ▼ to choose ROUGH,
MODERATE or CALM depending on
sea conditions.
c) Press ◄ to close the window.
Manual gain adjustment
While observing the scr een and the gain
tuning bar, press ◄ or ► to set the gain.
The setting range is 0-100.
3. Press the [MENU/ESC] key to finish.
1.8 Suppressing Sea Clutter
In rough weather, returns from the sea
surface, called sea clutter, are received over
several miles around own ship and mask
nearby targets. This situation can be
improved by properly suppressing the sea
clutter with the A/C SEA control.
In most cases suppress the clutter until it has
disappeared to leeward, but a little is still
visible windward. If the setting is too low,
targets will be hidden in the clutter, while if it
is set too high, both sea clutter and targets
will disappear from the display.
A common mistake is too over-suppress sea
clutter so that it is completely removed. You
can see how dangerous this can be by setting
up for maximum A/C SEA: A dark zone will
be created near the center of the scr een,
causing a loss of close-in target s. This dark
zone is even more dangerous if the sensitivity
has not been properly adjusted.
Always leave a little sea clutter visible on the
Screen, first adjusting automatically and then
fine tuning with the manual control as
necessary.
Sea clutter at screen center
1. Press the [GAIN] key consecutively until
the display shown below appears.
A/C SEA
AUTO : MODERATE
MANU
[GAIN] : A/C RAIN MENU
[MENU/ESC] : Exit.
20
A/C SEA adjustment window
2. Press ▲ or ▼ to choose AUTO or MANU
as appropriate.
Automatic A/C SEA adjustment
a) Press ► to open the automatic A/C
SEA options window.
ROUGH
MODERATE
CALM
A/C SEA options
b) Press ▲ or ▼ to choose ROUG H,
MODERATE or CALM depending on
sea conditions.
c) Press ◄ to close the window.
5
1. OPERATION
Manual A/C SEA adjustment
While observing the screen and the A/C
SEA tuning bar, press ◄ or ► to set the
A/C SEA. The setting range is 0-100.
4. Press the [MENU/ESC] key to finish.
1.9 Suppressing Rain Clutter
The vertical beamwidth of the antenna is
designed to see surface targ et s even when
the ship is rolling. However, by this design the
antenna will also pick up rain clutter (rain,
snow, or hail) in the same manner as normal
targets. The illustrat ion below shows the
appearance of rain clutter on the display.
The A/C RAIN control adjusts t he receiver
sensitivity as the A/C SEA control does but
rather in a longer time period (long er range).
The higher the setting the greater the
anti-clutter effect .
1.10 Measuring the Range
The bearing to a target can be m easur ed by
the range rings, by the cursor and by the
VRM (Variable Range Marker).
Measuring range by the cursor
Operate the cursor pad to place the cursor on
the inside edge of the target. Read the range
to the cursor at the bottom right corner of the
display.
Measuring range by the range rings
Count the number of rings bet ween the
center of the display and the target . Check
the range ring interval and judge the distance
of the echo from the inner edge of the nearest
ring.
Note: The range rings can be t urned on or off
with RINGS on page 1 of the System menu.
Measuring range by the VRM
Rain clutter at screen center
1. Press the [GAIN] key consecutively until
the display shown below appears.
A/C RAIN
65
[GAIN] : GAIN MENU
[MENU/ESC] : Exit.
A/C RAIN adjustment window
2. While observing the scr een and t he A/C
RAIN tuning bar, press ◄ or ► to adjust
the A/C RAIN. The setting r ange is 0-100.
3. Press the [MENU/ESC] key to finish.
1. Press the [MARK] key to show the Mark
menu.
MARK MENU
[GAIN] : EBL
[ALARM] : VRM
[MARK] : TLL OUTPUT
Mark menu
2. Press the [ALARM] key to display the
VRM, which is a dashed ring to
distinguish it from the range rings.
3. Operate the cursor pad t o place the VRM
on the inside edge of the target.
4. Check the VRM readout at the bottom left
corner on the screen to find the rang e to
the target.
To anchor the VRM on the screen, press the
[MENU/ESC] key. To erase the VRM, press
the [ALARM] key twice with the MARK MENU
displayed.
6
1. OPERATION
nm
6.0
2.0
Target
6.0
2.0
nm
Target
Cursor
VRM
Range, bearing
and time-to-go
to cursor
location
VRM
range
EBL
VRM
- - - .-°
2.91
RNG 2.22nm
nm
BRG 45.62°
TTG 02H21M
How to measure the range with the
VRM and cursor
1.11 Measuring the Bearing
The bearing to a target can be m easur ed with
the cursor and the EBL (Electronic Bearing
Line).
Measuring bearing with the cursor
Operate the cursor pad to place the cursor on
the inside edge of the target. Read the
bearing to the target at t he bottom right
corner.
Measuring bearing with the EBL
1. Press the [MARK] key to show the Mark
menu.
MARK MENU
EBL
Cursor
Range, bearing
and time-to-go
to cursor
location
EBL
bearing
EBL 45.62
VRM
- - - -
RNG 2.22nm
°
BRG 45.62°
nm
TTG 02H21M
Measuring range by the EBL and cursor
1.12 Shifting the Display
Own ship position, or sweep origin, can be
displaced manually or automatically to
expand the view field without switching to a
longer range. The default shift method is
manual.
If shift is activated when nav data is displayed,
the nav data is automatically erased.
1. Use the cursor pad to place the curs or
where you want to shift own ship position.
2. Press the [MODE] key to show the
Display Mode menu.
DISPLAY MODE
SHIFT (MANUAL)*
[GAIN] : EBL
[ALARM] : VRM
[MARK] : TLL OUTPUT
Mark menu
2. Press the [GAIN] key to show the EBL,
which is a dashed line to distinguish it
from the heading line.
3. Operate the cursor pad to bisect the
target with the EBL.
4. Check the EBL readout at the bottom left
corner on the screen to find the bearing to
the target.
3. Press ▲ to choose SHIFT (MANUAL).
4. Press the [MENU/ESC] key to close t he
NORMAL
ZOOM
NAV DISP OFF ON
[MENU/ESC] : Exit
Display mode menu
Note: If SHIFT (AUTO) is shown, open
the System menu and set SHIFT MODE
to MANUAL. For further details, see
SHIFT MODE on page 17.
menu.
To anchor the EBL, press the [MENU/ESC]
key. To erase the EBL, press the [GAIN] key
twice with the MARK MENU displayed.
7
Choose
manual
SHIFT
mode.
Select where to shift Shifted display
with the cursor.
1. OPERATION
nm
6.0
2.0
Cursor
+
EBL
- - - .-°
VRM - - - -nm
Zoom
Window
RNG 4.43nm
BRG 231.3°
TTG: 02H21M
How the manual shift works
To cancel the shifted display, open the
Display Mode menu, choose NORMAL and
then press the [MENU/ESC] key.
1.13 Zoom
The zoom feature allows you to double the
size of a selected area.
If zoom is activated when nav data is
displayed, the nav data is automatically
erased.
1. Use the cursor pad to place the cursor
where you want to zoom.
2. Press the [MODE] key to show the display
mode menu.
SELECT DISPLAY MODE
SHIFT (MANUAL)*
NORMAL
ZOOM
NAV DISP OFF ON
[MENU/ESC] : Exit
* AUTO may appear instead of MANUAL
depending on shift method selected.
Display mode menu
3. Press ▼ to choose ZOOM.
4. Press the [MENU/ESC] key to close the
menu. “ZOOM” appears at the top left
corner when the zoom feature is turned
on.
Zoom display
To cancel the zoom display, open the Display
Mode menu, choose NORMAL and then
press the [MENU/ESC] key. To choose new
zoom location, return to the NORMAL mode
and then repeat the zoom procedure.
1.14 User Menu Overview
The User menu, consisting of t hree pages of
menus, contains 12 items which the user may
set according to conditions.
1. Press the [MENU] key to open the User
menu.
INT REJECTION LOW
P
ECHO STRETCH : LOW
*
FTC: OFF
NOISE REJECTION: LOW
[MENU/ESC] : Exit.
* = "P" shows current function of PROG key
User menu, page 1
2. Use ▲ or ▼ to scroll the menu to display
desired item in reverse video.
WATCHMAN TIME OFF
HUE: DAY
PANEL DIMMER: OFF
HDG LINE OFF
[MENU/ESC] : Exit.
ECHO TRAIL OFF
TRAIL BRILLIANCE : LOW
TRIPLOG RESET?
SYSTEM MENU...
[MENU/ESC] : Exit.
User menu, pages 2 and 3
(1/3)
Page 2
(2/3)
Page 3
(3/3)
8
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