Furuno FCV-667 User Manual

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SAFETY INSTRUCTIONS

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel
should work inside the
equipment.

Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.

Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.

Do not disassemble or modify the
equipment.

Fire, electrical shock or serious injury can
result.

Do not place liquid-filled containers on
the top of the equipment.

WARNING

Keep heater away from equipment.

A heater can melt the equipment's power
cord, which can cause fire or electrical
shock.

Use the proper fuse.

Fuse rating is shown on the equipment.
Use of a wrong fuse can result in damage
to the equipment.

CAUTION

A warning label is attached to the equip­ment. Do not remove the label. If the
label is missing or illegible, contact
a FURUNO agent or dealer.

WARNING

To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.

Name: Warning Label (1)
Type: 86-003-1011-0
Code No.: 100-236-230

Fire or electrical shock can result if a liquid
spills into the equipment.

Immediately turn off the power at the
switchboard if the equipment is emitting
smoke or fire.

Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.

Make sure no rain or water splash leaks
into the equipment.

Fire or electrical shock can result if water
leaks in the equipment.

i

TABLE OF CONTENTS

INTRODUCTION................................................ iii

PRINCIPLE OF OPERATION.............................. v

SYSTEM CONFIGURATION .............................. vi

1. CONTROLS, INDICATIONS ........................1-1

1.1 Control Description .............................1-1

1.2 Indications .......................................... 1-2

2. BASIC OPERATION.................................... 2-1

2.1 Turning the Power On/Off ................... 2-1

2.2 Adjusting Brilliance.............................. 2-1

2.3 Display Mode Selection, Description ... 2-1

2.4 Adjusting Gain .................................... 2-6

2.5 Automatic Operation ...........................2-6

2.6 Selecting Picture Advance Speed ....... 2-7

2.7 Display Range Selection .....................2-7

2.8 Erasing Weak Echoes......................... 2-8

2.9 Measuring Depth to a Fish School....... 2-9

2.10 A-scope Display .................................. 2-9

2.11 Menu Operation ................................ 2-10

2.12 Suppressing Interference .................. 2-13

2.13 Suppressing Low Level Noise ........... 2-13

2.14 Selecting Background

and Echo Colors ............................... 2-14

2.15 Alarms ..............................................2-14

2.16 White Marker .................................... 2-16

2.17 Demonstration Picture....................... 2-16

2.18 Correcting Speed/Water Temperature

Readout ............................................ 2-17

3. INTERPRETING THE DISPLAY................... 3-1

3.1 Zero Line ............................................3-1

3.2 Fish School Echoes ............................ 3-1

3.3 Bottom Echo .......................................3-1

3.4 Surface Noise/Aeration .......................3-2

4. MAINTENANCE, TROUBLESHOOTING .....4-1

4.1 Maintenance .......................................4-1

4.2 Basic Troubleshooting ......................... 4-3

4.3 Diagnostics .........................................4-4

4.4 Transducer Check............................... 4-5

4.5 Speed/Water Temperature

Sensor (option) Check.........................4-5

4.6 Restoring Default Settings................... 4-5

MENU TREE ................................................... A-1

SPECIFICATIONS......................................... SP-1

INDEX

ii

INTRODUCTION

Congratulations on your choice of the FURUNO FCV-667 Color Video Sounder. We are
confident that you will enjoy many years of operation with this fine piece of equipment.

For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for quality and
reliability throughout the world. This dedication to excellence is furthered by our extensive global
network of agents and dealers.

The FCV-667 is just one of the many FURUNO developments in the field of echo sounding. The
compact, lightweight but rugged unit is easy to install and operate and is suitable for both fresh
and saltwater applications.

This unit is designed and constructed to withstand the rigors of the marine environment.
However, to obtain optimum performance from this unit, you should carefully read and follow the
recommended procedures for operation and maintenance. No machine can perform to the
utmost of its ability unless it is installed, operated and maintained properly.

We would appreciate feedback from you, the end-user, about whether we are achieving our
purposes.

Thank you for considering and purchasing FURUNO equipment.

Features

The FCV-667 dual-frequency (50kHz and 200kHz) color video sounder has a large variety of
functions, all contained in a splash-proof rugged plastic case that is compact to fit small boats.

The principal features of the FCV-667 are

User-friendly design for simplified operation.

•

A wide variety of display modes: bottom-lock expansion, marker zoom and unique bottom

•

zoom displays.

Potent 300 W transceiver.

•

8-color presentation (including background) on a 6" diagonal CRT, providing vivid

•

presentation of underwater conditions.

AUTO function permits unattended range and gain setting operations. The range scale and

•

gain change automatically so that the bottom is displayed in reddish brown or red on the
lower half of the screen.

A-scope display gives excellent bottom fish discrimination, vital for bottom trawler and

•

lobster/crab potter.

Digital and analog displays of navigational data.

•

iii

Alarms: fish, bottom, water temperature (requires appropriate sensor).

•

Six pulselengths for excellent performance on both shallow and deep ranges.

•

Universal 12-24 VDC power supply drawing 30 W of power at maximum.

•

Water temperature/speed sensor optionally available.

•

iv

PRINCIPLE OF OPERATION

This Color Video Sounder determines the distance between its transducer and underwater
objects such as fish, lake bottom or seabed and displays the results on a 6-inch color screen.

It does this by utilizing the fact that an ultrasonic wave transmitted through water travels at a
nearly constant speed of 4800 feet (1500 meters) per second. When a sound wave strikes an
underwater object such as fish or sea bottom, part of the sound wave is reflected back toward
the source. Thus by calculating the time difference between the transmission of a sound wave
and the reception of the reflected sound wave, the depth to the object can be determined. In a
sense an echo sounder can be thought of as being an extremely sophisticated and quick timer,
since it is capable of resolving time differences shorter than one thousandth of a second.

The entire process begins in the display unit. Transmitter power is sent to the transducer as a
short pulse of electrical energy. The electrical signal produced by the transmitter is converted into
an ultrasonic signal by the transducer and transmitted into the water. Any reflected signals from
intervening objects (such as a fish school) are received by the transducer and converted back
into an electrical signal. It is then amplified in the amplifier section, and finally, displayed on the
screen.

The picture displayed by the color video sounder is made up of a series of vertical scan lines,
one for each transmission. Each line represents a "snapshot" of what has occurred beneath the
boat. The series of snapshots are accumulated side by side across the screen, and the resulting
contours of the bottom and fish between the bottom and surface are displayed. The amount of
history of objects that have passed beneath the boat over a series of transmission varies from
less than a minute to a few minutes, depending on how you adjust the unit.

v

SYSTEM CONFIGURATION

DISPLAY UNIT
CV-667

TRANSDUCER

Standard supply
520-5PSC-A

Optional supply
520-5PWC
520-5MSC-A
520ST-PWA
524ST-MSA

Ship's mains
12-24 VDC

External equipment
(GPS navigator, etc.)

SPEED, TEMPERATURE SENSOR (option)

Speed/temperature sensor
ST-02MSB
ST-02PSB
ST-01PTB

Temperature sensor
T-02MTB
T-02MSB
T-03MSB

vi

1. CONTROLS, INDICATIONS

1.1 Control Description

The equipment is so d es igned that even a fi r s t tim e user can quic kl y become acquainted w it h th e
operatin g pr ocedure. Oper ation of each contr ol or key is ack n ow ledged by an alpha numeric
message or symbol indication on the screen.

Control Function

SHIFT-, SHIFT+
(Appears in text as [-], [+].)

BRILL
AUTO
ADVANCE (BRILL + AUTO)

SIG LEV

ALARM
A-SCOPE (SIG LEV + ALARM)

MARKER ▲, MARKER
(Appears in text as [▲] or [▼].)

RANGE

▼

• Change display start depth.
Select options on menus.

•

Adjusts brilliance of display.
Turns the automatic sounder adjustment feature on/off.
Pressing the BRILL and AUTO keys together selects display

advancement speed.
Eliminates low intensity echoes (up to light-blue echoes) in two

steps.
Opens/closes the alarm menu.

Pressing the SIG LEV and ALARM keys together displays the
A-scope display at the right 1/4 of the screen.

• Shift the Variable Range Marker (VRM).

• Set alarm zone.

Select menu items.

•

Set white marker.

•

Sets the basic range of the display.

GAIN
MODE

Adjust s receiver sensitivity.

Turns unit on/off.

•

Selects display mode.

•

1-1

1.2 Indications

Speed*

Noise Limiter

Picture Advance Speed

Water
temperature*

Nav data*

Water temperature
scale*

Water temperature
marker* (Color
changes with
HUE setting.)

Color
bar

Demonstration Mode

Alarm Icon
Auto Setting

Signal Level

49.8˚F 12.5kt NL1 ç1 SL1

35°15.000' N
135°07.500' W

70

60

50

39.8

40

30

(DEMO)

AUTO-1

49.6

20

40

60

80

Alarm T ype
(F,B,TI,TB)

F

0

Active alarm
Minute marker
(yellow, blue,
30 sec. each)

Range scale

Alarm zone
marker

Variable range
marker (green)
w/depth readout

All indications and
markers are displayed
in white unless
noted otherwise.

Depth

* Requires appropriate sensor.

1-2

2. BASIC OPERATION

2.1 Turning the Power On/Off

Turn the [MODE] switch clockwise to turn the power on. The unit starts with the settings used
before it was turned off last time. Note that there is a few seconds delay prior to display of the
picture until the CRT warms up. To turn the power off, turn the switch fully counterclockwise.

2.2 Adjusting Brilliance

Use the [BRILL] key to adjust the brilliance. The selected brilliance level is shown on the display
as below. There are six levels of brilliance including off. Keep the brilliance moderate to extend
the life of the CRT.

BRILL: 0

2.3 Display Mode Selection, Description

2.3.1 Display mode selection

Seven display modes are available and you may select one of them with the [MODE] switch.

MODE switch description

MODE Switch

Position

HF Provides the high frequency (200 kHz) normal picture on the full screen.

LF Displays the low frequency (50 kHz) normal picture on the full screen.

DUAL

HF ZOOM Shows the normal display of the high frequency (200 kHz) on right half and its

LF ZOOM

NAV Shows navigation data in analog or digital form (depending on menu setting) on

MENU Displays the main and system menus.

Displays the normal display for high frequency (200 kHz) on right half and that for
the low frequency (50 kHz) on the left half.

zoom display on the left half.

Provides the normal display of the low frequency (50 kHz) on right half and its
zoom display on the left half.

the full screen.

Function

2-1

2.3.2 Display mode description

HF, LF (high frequency, low frequency) mode

The sounder uses ultrasonic pulses to detect bottom conditions. The lower the frequency of the
pulse the wider the detection area. Therefore, the 50 kHz frequency is useful for general
detection and judging bottom conditions, while the 200 kHz frequency is useful for detailed
observation of fish schools.

0.0

Fish
school

Bottom

49.6

0

20

40

60

80

DUAL frequency mode

This mode provides the 50 kHz picture on the left-half of the screen and the 200 kHz on the right
half, and is useful for detecting fish schools which have different reflection characteristics with
frequency. For example, a school of tiny fish like minnow returns stronger echoes on a high
frequency compared to a low frequency.

0

50 kHz 200 kHz
picture picture

20

40

60

0.0

49.6

0

20

40

80

2-2

ZOOM mode (high or low frequency)

Three types of zoom displays are available: bottom-lock expansion, bottom zoom and marker
zoom. The zoom mode to be used can be selected on the main menu with ZOOM MODE.

Zoom marker (yellow)

This section
is zoomed

10

Normal

20

display

30

40

Fish

Bottom-

lock

display

220.7

BOTTOM-LOCK

Bottom-zoom display

0

15

10

20

25

36.4

20

30

40

0

5
4

3
2

1
0

Zoom
marker
(yellow)

This display provides a compressed normal picture on the
top 2/3 of the screen and a 5 or 10 meter (10 or 20 feet)
wide layer in contact with the bottom is expanded onto the
bottom 1/3 of the screen. This mode is useful for bottom
discrimination. Note that the seabed should be steadily
and distinctly plotted in red or reddish-brown. Adjust the
gain if necessary.

Note 1:

The bottom-lock range can be selected on the

system menu [3].

Note 2:

The zoom marker can be turned on/off on the

system menu [1].

This mode expands bottom and bottom fish echoes two to
five times to vertical size of the screen, and it is useful for
determining bottom hardness. A bottom displayed with a
short echo tail usually means it is a soft, sandy bottom. A
long echo tail means a hard bottom.

The zone automatically moves so that the bottom echoes
locate on the lower half of the screen.

Note 1: T he amount of expansion can be selected on the
system menu [3].
Note 2: T he zoom marker can be turned on/off on the
system menu [1].

Bottom

Normal
display

BOTTOM ZOOM

0

15

10

14.7

Fish
school

20

Zoomed fish
school

25

28.2

Marker-zoom
display

20

30

40

Zoom marker
(yellow)

MARKER ZOOM

Normal
display

Variable range
marker (green)

This section
is zoomed

This mode expands selected area of the normal picture to
full vertical size of the screen on the left-half window. You
may specify the portion to expand with the VRM (Variable
Range Marker), which you can shift with [▲] or [▼]. The
area between the VRM and the zoom range marker is
expanded. The length of the segment is equal to one
division of the depth scale.

2-3

NAV mode

This mode shows navigation data digitally or graphically. The nav display to use can be selected
on the system menu [1] with NAV.

Trip Distance*

Speedometer*

Depth

Waypoint*

Course*
Bearing
to Waypoint*

50

40

30

20

10

0

DEPTH

151ft

WPT: FOX1 35˚23.19'N
122˚46.90'E
CSE: 120˚
BRG: 135˚

XTE

0.5 S
NM

1 0.5

RNG

100.5NM

0

TRIP NM

123.0

SPEED

10.6 KT

( : 19 25)

TEMP

84.7˚F

0.5

Cross-Track Error*
(Shows amount and direction
to steer to return to course.
The example shows you should
steer 0.5 nm starboard to return to course.)

Depth

20

40

60

1

80

151ft

0

Speed*

Alarm Range

Water Temperature*

Ship's Position*

Bearing to Waypoint
relative to ship's course*

* Requires appropriate sensor.

0

Water Temperature*

Speed*

Position*

84.7 ˚F

10.6kt

35°23. 19'N
122

°

46. 90'E

* Requires appropriate sensor.

20

40

60

80

2-4

Enlarging a nav data indicatio n
You can enlarge and display one of the data indications as follows.

1. Press [▲] or [▼] to select the indication which you want to enlarge. For example, select the
depth indication.

2. Press the [+] k ey to enlarge the data.

0

151

ft

3. T o retur n to th e full dat a dis play, press the [-] key.

20

40

60

80

2-5

2.4 Adjusting Gain

The [GAIN] control adjusts the sensitivity of the receiver. Adjust it so that a slight amount of noise
remains on the screen. Generally, use a higher gain setting for greater depths and a lower
setting for shallower waters.

Note:

The [GAIN] control is inoperative when the automatic mode is active.

Gain too high Gain proper Gain too low

2.5 Automatic Operation

Automatic operation is useful when you are preoccupied with other tasks and do not have time to
adjust the display.

2.5.1 How it works

The automatic function automatically selects the proper gain and range scale according to depth.
It works as follows:

The range changes automatically to locate the bottom on the lower half of the screen. It

•

jumps to one step shallower range when bottom echoes reach a halfway point of the full scale
from top and to one step deeper range when they come to the lower edge of the scale.

The gain is automatically adjusted to display the bottom echo in reddish-brown (default color

•

arrangement).

Clutter level (on the main menu), which suppresses low level noise, is automatically adjusted.

•

2.5.2 Enabling automatic operation

Two types of automatic modes are available: AUTO 1, for fishing, and AUTO 2, for cruising.
Since cruising uses a higher clutter rejection setting than fishing, it is not recommended for
detection of fish because weak fish echoes may be deleted by clutter rejection. Note that the
[SHIFT] keys ([+], [-]), [RANGE] switch and [GAIN] control are inoperative in the auto mode.

Press the [AUTO] key. Each press of the key turns the auto function on or off in the sequence
shown below.

2-6

AUTO-1 ON

(FISH MODE)

AUTO-2 ON

AUTO OFF

(CRUISE MODE)

2.6 Selecting Picture Advance Speed

The picture advance speed determines how quickly the vertical scan lines run across the screen.
When selecting a picture advance speed, keep in mind that a fast advance speed will expand the
size of the fish school horizontally on the screen and a slow advance speed will contract it.

1. Press the [BRILL] and [AUTO] keys together. The display should look something like the one
below. The fraction shown on the display denotes number of scan lines produced per
transmission. For example, 1/8 means one scan line is produced every eight transmissions.
"0" freezes the display and it is convenient for observing an echo.

ADVANCE: 1

(1/8)

2. Continue pressing the [BRILL] and [AUTO] keys together to select desired speed.

2.7 Display Range Selection

The basic range and range shifting functions used together give you the means to select the
depth you can see on the screen. The basic range can be thought of as providing a "window" into
the water column and range shifting as moving the "window" to the desired depth.

Shift

Display

2.7.1 Basic range selection

The basic range may be selected with the [RANGE] switch from the eight ranges shown in the
table below.

Table 1-1 Basic ranges (default settings)

Range No.12345678

Meters 5 10 20 40 80 150 200 300

Feet 15 30 60 120 200 400 600 1000

Fathoms 3 5 10 20 40 80 100 150

Passi/Braza (P/B) 3 5 10 30 50 100 150 200

2-7

Operate the [RANGE] switch and the display shown below appears. Adjust the [RANGE] control
again to select a basic range.

RANGE: 30 ft

Note:

The [RANGE] switch is inoperative when the auto function is active.

2.7.2 Range shifting

The basic range may be shifted up or down with the [SHIFT] keys ([+], [-]). Press a [SHIFT] key
and the display shown below appears. Press a [SHIFT] key again to select the amount of shift.

SHIFT: 0 ft

Note 1:

underwater conditions. In the worst case echoes will not appear.

Note 2:

Note 3:

Note 4:

The maximum shift range is 1000 feet (300 m). However, actual range will depend on

Basic ranges can be changed on the system menu [3].

The unit of depth may be selected on the system menu [1].

The range cannot be shifted when the auto function is active.

2.8 Erasing Weak Echoes

Dirty water or reflections from plankton may be painted on the display in green or light-blue.
These weak echoes may be erased as follows:

1. Press the [SIG LEV] key. The following display appears.

SIGLVL: 1

2. Press the [SIG LEV] key again to select signal level (echo color) to erase. Every pressing
deletes the weakest color echoes on the screen, up to the light-blue echoes. You may
identify the deleted colors on the color bar; deleted colors disappear from the color bar. The
selected level is shown as SL1, SL2 or SL3 at the top of the screen. Signal level "0" disables
this function.

2-8

2.9 Measuring Depth to a Fish School

The VRM (Variable Range Marker) functions to measure the depth to fish schools or other echo.

1. Press [▲] or [▼] to place the VRM on an echo.

2. Read the VRM range just above the VRM.

0

VRM (green)

39.8

49.6

20

40

60

80

2.10 A-scope Display

This display shows echoes at each transmission with amplitudes and tone proportional to their
intensiti es, on the right 1/4 of the scr een. It is useful for estimating the kind of fish s chool and
bottom composition. To turn the A-scope display on or off press the [SIG LEV] and [ALARM]
keys together.

0

0.0

Normal

display

32.3

10

20

30

40

A-scope

display

2-9

2.11 Menu Operation

The menu, consisting of the main menu and three system menus, contains less often used
functio ns which do not require frequent adj ustment.

2.11.1 Menu selection

1. Set the [MODE] switch in the ME NU position.

NOISE LIMITER

OFF 1 2 3

HUE SELECTION

1 (1 - 7)

GAIN ADJUST 200KHZ

0 (-20 - +20)

GAIN ADJUST 50KHZ

0 (-20 - +20)

CLUTTER LEVEL

0 * (0 - 3)

ZOOM MODE (B. LOCK)

M/Z B/L B/Z

* A shown when
auto mode is
active.

/ : TO SELECT ITEM, 1/2

-/+

: TO SET CONDITION.

2. To go to page 2 of the main menu, select ZOOM MODE (B. LOCK) with [▼] and th en pr ess
[▼] again.

MARKER (VRM)

VRM WHT

GO TO SYSTEM MENU

NO YES

/ : TO SELECT ITEM, 2/2

-/+

: TO SET CONDITION.

3. To go to the system me nu , pr ess [▼] to select GO TO SYSTEM M EN U an d [+] to select YE S.
You can switch among system menus by selecting MENU and using [+] or [-].

2-10

( * SYSTEM MENU [1] *)

MENU :
DEPTH :
SPEED :

TEMP :

ZOOM MARK :

F/A LEVEL :

/ : TO SELECT ITEM.

-/+ : TO SET CONDITION.

[1] [2] [3]
m ft fa PB
kt MPH KPH
° C ° F
OFF ON
WEAK MED STRG
GRPH DATA

NAV:

(* SYSTEM MENU [2] *)

MENU :

NAV DSP:

FORMAT :

SPD SEL :
TMP SEL :
TMP GRP:

SPD ADJ :
TMP ADJ :

(ADJUSTABLE OWN SENSOR ONLY.)

OWN SENSOR
SPEED

[1] [2] [3]
OFF L/L R/B CSE
NMEA CIF
OFF OWN NMEA
OFF OWN NMEA
OFF LOW HIGH
+0 % [-50 - +50]
+0.0 °F [-20 - +20]

OWN SENSOR

TEMPERATURE

(* SYSTEM MENU [3] *)

MENU :
RANGE1 :
RANGE2 :
RANGE3 :
RANGE4 :
RANGE5 :
RANGE6 :
RANGE7 :
RANGE8 :

ZOOM RANGE:

B/L RANGE:

[1] [2] [3]
15 (10 - 1000)
30
60
120
200
400
600
1000
X2 X3 X4 X5
10 20

0.0 kt °F

/ : TO SELECT ITEM.

-/+

: TO SET CONDITION.

/ : TO SELECT ITEM.

-/+ : TO SET CONDITION.

4. Press [▲] or [▼] to select menu item.

5. Press [+] or [-] to set condition.

6. Set the [MODE] switch in any other position to register selection and close the menu.

2.11.2 Main m e nu descrip tion

Menu item Description

NOISE LIMITER Eliminates noise from other echo sounders and electrical

interference.
HUE SELECTION Selects colors for echoes and background.
GAIN ADJUST (50kHZ, 200KHZ) Adjusts the gain for both high and low frequencies. Changing

this setting by 10 is equal to changing the GAIN control by 1. If

the sensitivity is too low or the auto function does not work

properly when the transducer is installed inside the hull, try to

adjust the gain here.
CLUTTER LEVEL Eliminates blue dots, which are mainly caused by unclean

water, from the screen.
ZOOM MODE Selects the type of zoom display. B/L, Bottom-lock; B/Z,

Bottom zoom, and M/Z, Marker zoom.
MARKER Selects which marker to use; VRM or white marker.

GO TO SYSTEM MENU Select YES to go to the system menu.

2-11

2.11.3 System menu description

Menu item Description

System Menu 1

DEPTH Selects unit of depth measurement; meters, feet, fathoms, passi/braza.

SPEED Selects unit of speed measurement; knots, miles per hour, kilometers per hour.

TEMP Selects unit of temperature measurement; Celsius and Fahrenheit.

ZOOM MARK Turns zoom range and expansion range markers on/off.

F/A LEVEL

NAV Selects digital or analog display of navigation data.

System Menu 2

NAV DSP Selects digital data to display at top-left corner on the screen. L/L, latitude and

FORMAT

SPD SEL Selects source of speed data. OWN, speed data fed by optional speed sensor;

TMP SEL

TMP GRP Turns temperature graph on/off. Requires water temperature sensor.

Sets fish alarm level.
WEAK: Alarm against weak to strong echoes.
MED: Alarm against medium to strong echoes.
STRG: Alarm against strong echoes only.

longitude position; R/B, Range and bearing to waypoint, CSE, Ship's course.

Selects format of data fed from nav sensor. CIF (FURUNO developed) is
standard data format of FURUNO equipment.

NMEA, speed data fed by position-fixing equipment.

Selects source of water temperature data. OWN, water temperature data fed by
optional water temperature sensor; NMEA, water temperature data fed by
position-fixing equipment.

OFF: No water temperature graph.
LOW: Temperature graph scale 30°F to 70°F (0°C to 20°C)
HIGH: Temperature graph scale 50°F to 90°F (10°C to 30°C)

SPD ADJ

TMP ADJ Offsets water temperature measured by optional speed sensor. When the water

System Menu 3

RANGE 1-8 Sets basic ranges. Change when default ranges are not satisfactory.

ZOOM RANGE

B/L RANGE Selects range for bottom-lock expansion display.

Offsets speed measured by optional speed sensor. When the speed indication
appears to be wrong, apply an offset here. Speed data fed from position-fixing
equipment cannot be compensated.

temperature indication appears to be wrong, apply an offset here. Water
temperature data fed from position-fixing equipment cannot be compensated.

Selects range scale for bottom zoom and marker zoom displays. X2, for
example, expands echoes to double size relative to those on the normal
display.

2-12

2.12 Suppressing Interference

Interference from other acoustic equipment operating nearby or other electronic equipment on
your boat may show itself on the display as shown below.

To suppress interference, do the following:

1. Select MENU with the [MODE] switch.

2. Select NOISE LIMITER.

3. Press [+] or [-] to select degree of suppression desired. "3" provides the highest degree of

suppression.

Interference from Electrical inteference
other sounder

Turn the noise limiter circuit off when no interference exists, otherwise weak echoes may be
missed.

2.13 Suppressing Low Level Noise

Light-blue dots may appear over most of screen. This is mainly due to unclean water or noise.
This noise can be suppressed by adjusting CLUTTER on the menu.

When the automatic mode is on, the clutter suppression setting is fixed at AUTO. To suppress
low level noise in manual sounder operation do the following:

1. Select MENU with the [MODE] switch.

2. Select CLUTTER LEVEL.

3. Press [+] or [-] to select degree of suppression desired. "3" provides the highest degree of

suppression.

Low level noise

2-13

2.14 Selecting Background and Echo Colors

1. Select MENU with the [MODE] switch.

2. Select HUE SELECTION.

3. Press [+] or [-] to select hue arrangement desired, referring to the table below.

Hue options

Hue No. Background color Echo color

1 Blue 7 colors, bottom red

2 Blue 6 colors, bottom red

3 Black 7 colors, bottom reddish-brown

4 Black 6 colors, bottom red

5 White 7 colors, bottom red

6 White 6 colors, bottom reddish-brown

7 Black Monochrome yellow, 8 intensities

2.15 Alarms

2.15.1 Alarm description

Bottom alarm

The bottom alarm sounds when the bottom is within the alarm range set. To activate the bottom
alarm the depth must be displayed.

Fish alarm

The fish alarm sounds when fish of a certain strength are within the preset alarm range. The
echo strength which triggers the fish alarm can be selected on the system menu [1] with F/A
LEVEL.

Water temperature alarm

There are two types of water temperature alarms: IN and OUT. The IN alarm sounds when the
water temperature is within the range set; the OUT alarm sounds when the water temperature is
higher than the range set. This alarm requires water temperature data.

2-14

2.15.2 Activating/deactivating an alarm

1. Press the [ALARM] key to display the alarm menu.

BOTTOM OFF ON

ALARM ZONE: 0 --- 5
RANGE : 5

FISH OFF ON
ALARM ZONE: 0 --- 5
RANGE : 5

TEMP OFF IN OUT
ALARM ZONE: 32 --- 37
RANGE : 5

s/t

: TO SELECT ITEM.

:

TO SET CONDITION.

-/+

2. Press [▲] or [▼] to select an alarm.

3. Press [+] to select ON, IN or OUT. (For the water temperature alarm, select IN to get the

alarm when the water temperature is within the alarm zone range, or OUT to get the alarm
when the water temperature is higher than the alarm zone range.)

4. Press [▼] to select ALARM ZONE.

5. Adjust width of alarm zone with [+] or [-].

Alarm type

B: Bottom
F: Fish

F

Alarm
zone

Alarm icon (Appear when alarm is violated.)

TI: Temperature IN
TO: Temperature OUT

Alarm zone marker
(Fish, bottom alarms only)

6. Press [▼] to select RANGE.

7. Use [+] to [-] to set display range for the alarm.
To deactivate an alarm, select OFF at step 3 in the above procedure.

2.15.3 Silencing the buzzer

When an alarm is viol ated, the buzze r sounds and the alarm icon and name of alarm violated
(see illustration above) appear on the display. You can temporarily silence the buzzer by
pressing the [ALARM] key. However, the buzzer will sound the ne xt time the ala rm set ting is
violated.

2-15

2.16 White Marker

The white marker functions to display a particular echo color in white. For example, you may
want to display the bottom echo (reddish-brown) in white to discriminate fish echoes near the
bottom. Note that the bottom mu st be displayed in reddish-brown for the white marker to
function.

1. Set the [MODE] switch in the ME NU position.

2. Press [▼] until pa ge 2 of the mai n me nu app ear s.

3. Select WHT from th e MAR KER fi el d.

4. Set the [MODE] switch in desired mode position.

5. Press [▲] or [▼] to select color to display in white. The indication WHITE MARKER appears.

As you press those keys the white cursor on the color bar shows the color currently selected
to display in white.

White cursor shows
color currently displayed
in white.

2.17 Demonstration Picture

Your unit incorporates a convenient demonstration display to help you become acquainted with
how it works. Connection of the transducer is not required.

1. Turn on the equipment while pressing any key. The following display appears.

*** OPTION MODE ***

[−] : SELF TEST
[s] : SET DATA TO DEFAULT
[t] : DEMONSTRATION

PLEASE HIT ANY KEY.
PROG-NO. 025-2156-0**

** Program version No.

2. Press [▼] to select DEMONSTRATION. The foll owing display appears .

*** DEMO MODE ***

OFF ON

3. Press [+] to select ON.

4. Turn the power off and on again.

5. To turn off the demonstration mode, press [-] to select OFF at step 3 in this procedure.

2-16

2.18 Correcting Speed/Water Temperature Readout

Wrong ship's speed or water temperature indication can be corrected on the system menu 2 as
follows:

1. Set the [MODE] switch in the MENU position.

2. Press [▼] to s el ect Z OOM MODE, a nd pr es s th e k e y once again t o go to page 2 o f th e menu.

3. Press [▼] to select GO TO SYSTEM MENU and then press [+] to select YES.

4. Use [+] key to select system menu 2.

(* SYSTEM MENU [2] *)

MENU :

NAV DSP :

FORMAT :

SPD SEL :
TMP SEL :
TMP GRP:

SPD ADJ :
TMP ADJ :

(ADJUSTABLE OWN SENSOR ONLY.)

[1] [2] [3]
OFF L/L R/B CSE
NMEA CIF
OFF OWN NMEA
OFF OWN NMEA
OFF LOW HIGH
+0 % [-50 - +50]
+0.0 °F [-20 - +20]

OWN SENSOR
SPEED

0.0 kt

s/t

-/+: TO SET CONDITION.

: TO SELECT ITEM.

5. Select SPD ADJ or TMP ADJ as appropriate.

6. Use [+], [-] to enter offset.

OWN SENSOR

TEMPERATURE

°F

2-17

3. INTERPRETING THE DISPLAY

3.1 Zero Line

The zero line (sometimes referred to as the transmission line)
represents the transducer's position, and moves off the screen
when a deep phased range is used.

Zero
line

3.2 Fish School Echoes

Fish school echoes will generally be plotted between the zero
line and the bottom. Usually the fish school/fish echo is
weaker than the bottom echo because its reflection property is
much smaller compared to the bottom. The size of the fish
school can be ascertained from the density of the display.

3.3 Bottom Echo

Echoes from the bottom are normally the strongest and
are displayed in reddish-brown color (in default color
arrangement) but the color and width will vary with
bottom composition, water depth, frequency, sensitivity,
etc.

In a comparatively shallow depth, a high gain setting will
cause a second or sometimes a third or a fourth echo to
be displayed at the same interval between them below
the first echo trace. This is because the echo travels
between the bottom and the surface twice or more in
shallow depths.

Second bottom

Size of

fish school

Intensity

difference in

water depth

echo

Small
school

Shift

Large
school

The color of the bottom echo can be used to help
determine the density of the bottom materials (soft or
hard). The harder the bottom, the wider the trace. If the
gain is set to show only a single bottom echo on mud, a
rocky bottom will show a second or third bottom return.
The range should be chosen so the first and second
bottom echoes are displayed when bottom hardness is
being determined.

Rock base

Mud

and sand

3-1

3.4 Surface Noise/Aeration

When the waters are rough or the boat passes over a wake, surface noise may appear near the
zero line. As surface turbulence is acoustically equivalent to running into a brick wall, the bottom
echo will be displayed intermittently. Similar noise sometimes appears when a water temperature
difference (thermocline) exists. Different species of fish tend to prefer different temperature
zones, so the thermocline may be useful to help identify target fish. 200 kHz tends to show
shallow thermoclines better than 50 kHz.

In rough waters the display is occasionally interrupted due to below-the-ship air bubbles
obstructing the sound path. This also occurs when the boat makes a quick turn or reverses
movement. Lowering the picture advance speed may reduce the interruption. However,
reconsideration of the transducer installation may be necessary if the interruption occurs
frequently.

Surface noise

Caused by

aerated water

Thermocline

3-2

4. MAINTENANCE, TROUBLESHOOTING

WARNING

ELECTRICAL SHOCK HAZARD
Do not open the equipment.

Only qualified personnel
should work inside the
equipment.

4.1 Maintenance

Regular maintenance is important for good performance. Following the recommended
maintenance procedures will help keep your set in good working condition.

4.1.1 General checking

Important points to be checked from time to time are tabulated below.

Maintenance check points

Check point Action

Transducer cable If conductors are exposed, replace cable.

Power cable plug/transducer cable plug If loosened, tighten.

Display unit ground If corroded, clean.

Ship's mains voltage If out of ratings, correct problem.

4.1.2 Replacement of fuse

The fuse on the power cable protects the equipment against overvoltage/reverse polarity of the
ship's mains or internal fault of the equipment. If the fuse blows, find the cause before replacing
the fuse. If the fuse blows again after replacement, call for service. A fuse rated for more than 3A
should not be used since it would damage the equipment and void the warranty.

CAUTION

Use the proper fuse.

Use of a wrong fuse can cause fire or
equipment damage.

4-1

4.1.3 Cleaning

Keep the equipment clean and dry at all times. Dust or loose dirt should be wiped off with a soft,
dry cloth. Do not use chemical cleaners to clean the display unit - they can remove paint or
markings.

4.1.4 Maintenance of the transducer

Marine life on the transducer face will result in gradual decrease in the sensitivity. Check the
transducer face for cleanliness each time the boat is hauled out of the water. Carefully remove
any marine life with a piece of wood or fine sandpaper.

4-2

4.2 Basic Troubleshooting

The troubleshooting table below presents common problems and the means to restore normal
operation. If normal operation cannot be restored do not attempt to check inside the equipment.

Basic troubleshooting

If… Then

check battery voltage.

neither echo nor fixed range scale appears

no echo but range scale shows

echo appears but no zero line

the equipment shows signs of low sensitivity

no water depth readout is shown

much noise or interference is present

speed/water temperature indication* is absent or
unrealistic

position indication* is absent or unrealistic

•

check fuse.

•

check battery terminal for corrosion.

•

check that power cable is securely

•

plugged.

check if display speed is set to "0."

•

check if transducer plug is firmly

•

connected.

check if range shifting is set to "0."

•

check if gain setting is suitable.

•

check for air bubbles or marine life

•

attached to transducer.

check if water is dirty.

•

bottom may be too soft to return proper

•

echo.

check if bottom echo is painted red or

•

reddish-brown.

check if bottom is displayed.

•

check if transducer/transducer cable is too

•

close to engine.

check unit ground.

•

check if there are other echo sounders of

•

the same frequency nearby.

check that sensor plug is securely

•

fastened.

check that sensor plug is securely

•

fastened.

check position-fixing equipment.

•

* Requires appropriate sensor.

4-3

4.3 Diagnostics

Your equipment incorporates a diagnostic test facility to check the devices and controls for
proper operation.

1. Turn on the unit while pressing any key. The following display appears.

*** OPTION MODE ***

[−] : SELF TEST

] : SET DATA TO DEFAULT

[

] : DEMONSTRATION

[

PLEASE HIT ANY KEY.

PROG-NO. 025-2156-0**

** Program version No.

2. Press the [-] key to start the diagnostic test. The diagnostics screen appears, devices are
checked and the results displayed as OK or NG (No Good).

3. Operate all controls one by one. Confirm that key name and switch position are correct.

Note:

Do not place the [MODE] switch in the POWER OFF position; power will be turned off.

(* SELF TEST *)

REDDISH-BROWN

RED

ORANGE

YELLOW

GREEN

LIGHT-BLUE

BLUE

PLEASE CHECK KEYS/SWITCHES.

Note:

If NG appears instead of OK for any device or panel switch, contact FURUNO for

PROM : OK
E2PR : OK
SRAM : OK
VRAM1 : OK
VRAM2 : OK
SIO : NG*

KEY : NONE
RANGE : 1
GAIN : 14
MODE : MENU

DEVICE CHECK

Major devices are checked.
OK for normal, NG (No Good)
for error.

PANEL SWITCH CHECK

Operate each key and switch.
Confirm that key name and
switch position are correct.

* Special connection

cable required to check SIO.
NG displayed when cable is
not connected.

service. Do not attempt to check inside the unit because of the high voltage used in the
equipment.

4. To terminate the test, turn the power off.

4-4

4.4 Transducer Check

A simple and reliable check of the transducer is to temporarily replace the transducer with a new
one. If the sensitivity is considerably improved through this change, the transducer is probably
faulty. This method is especially useful for inside-hull or through-hull installation.

Anot her me thod is to lis ten to the transmission sound. Haul th e trans ducer f rom th e water and
turn on the pow er. Put your ear near the transducer face and car e ful l y lis t en to th e tr ans m is si o n
sound. If you can hear a clicking sound, the transducer is probably normal. Next, rub the
transducer face with your hand and observe whether noise appears on the screen. The
appearance of noise indicates the transducer is normal. In case of neither sound nor noise, the
transducer is probably faulty.

4.5 Speed/Water Temperature Sensor (option)

Check

The ide a o f the transd uc er c heck can apply t o t hi s case, too; temporarily subs ti tu te a new sensor.
If the speed/temperature indications become normal, your sensor may be faulty.

When a new sensor is not available, try to tur n the water wheel with a fin ger. If the se nsor is
normal, the speed indication will be two to three knots when the wheel is turned slowly and seven
to eight knots when turned more quickly. As for the water temperature, the water temperature
indication should change when you touch the thermosensor.

4.6 Restoring Default Settings

1. Turn on the unit while pressing any key. The following display appears.

*** OPTION MODE ***

[−] : SELF TEST
[s] : SET DATA TO DEFAULT
[t] : DEMONSTRATION

PLEASE HIT ANY KEY.
PROG-NO. 025-2156-0**

** Program version No.

2. Press [▲] to restore default settings. The message SET DATA TO DEFAULT! appears. After
default settings are restored, the message is erased and the normal display appears. See
the next page for de fa ul t settings.

4-5

MENU TREE

[MODE] switch in
MENU position

NOISE LIMITER

OFF 1 2 3

HUE SELECTION

1 (1 - 7)

GAIN ADJUST 200KHZ

0 (-20 - +20)

GAIN ADJUST 50KHZ

0 (-20 - +20)

CLUTTER LEVEL

0 (0 - 3)

ZOOM MODE (B. LOCK)

M/Z B/L B/Z

/ : TO SELECT ITEM, 1/2

:

TO SET CONDITION.

-/+

Press at
ZOOM MODE.

MARKER(VRM)

VRM WHT

GO TO SYSTEM MENU

NO YES

Press [+] at
GO TO SYSTEM
MENU.

( * SYSTEM MENU [1] *)

MENU :
DEPTH :
SPEED :

TEMP :

ZOOM MARK :

F/A LEVEL :

/ : TO SELECT ITEM.

:

TO SET CONDITION.

-/+

Press [-]
key.

(* SYSTEM MENU [2] *)

MENU :

NAV DSP :

FORMAT :

SPD SEL :
TMP SEL :
TMP GRP:
SPD ADJ :
TMP ADJ :

(ADJUSTABLE OWN SENSOR ONLY.)

[1] [2] [3]
m ft fa PB
kt MPH KPH
° C ° F
OFF ON
WEAK MED STRG
GRPH DATA

NAV :

[1] [2] [3]
OFF L/L R/B CSE
NMEA CIF
OFF OWN NMEA
OFF OWN NMEA
OFF LOW HIGH
+0 % [-50 ­ +0.0 °F [-20 - +20]

Press [+] at
MENU.

50]

/ : TO SELECT ITEM, 2/2

:

TO SET CONDITION.

-/+

Default setings are circumscribed.

DEFAULT CONTROL SETTINGS

SHIFT: 0

BRILL: 6

ADVANCE: 4

SIG LEV: 0

ALARM: OFF

A-SCOPE: OFF

MARKER: 0

OWN SENSOR
SPEED

0.0 kt

/ : TO SELECT ITEM.

-/+

:

TO SET CONDITION.

Press [-]
key.

(* SYSTEM MENU [3] *)

MENU :
RANGE1 :
RANGE2 :
RANGE3 :
RANGE4 :
RANGE5 :
RANGE6 :
RANGE7 :
RANGE8 :

ZOOM RANGE:

B/L RANGE:

/ : TO SELECT ITEM.

-/+

:

TO SET CONDITION.

TEMPERATURE

[1] [2] [3]
15 (10 - 1000)
30
60
120
200
400
600
1000
X2 X3 X4 X5
10 20

OWN SENSOR

°F

Press [+] at
MENU.

A-1

SPECIFICATIONS OF COLOR VIDEO SOUNDER

FCV-667

1. GENERAL

(1) Display 6-inch diagonal CRT
(2) Echo Color 8 colors (including background color) according to echo intensity.

Monochrome display is also available. The background color is selectable
from blue, light blue, white and black.

(3) Basic Range Meters: 5/10/20/40/80/150/200/300

Feet: 15/30/60/120/200/400/600/1000
Fathoms: 3/5/10/20/40/80/100/150
Passi/Braza: 3/5/10/30/50/100/150/200

The basic ranges can be changed on the syste m menu.
(4) Range Shift Up to 300 meters (1000 feet, 150 fathoms, 200 passi/braza)
(5) Zoom Range Times 2, 3, 4 and 5 ranges
(6) Bottom Lock Expansion Range

5/10 meters, 10/20 feet, 2/5 fathoms, 2/5 passi/braza
(7) Auto Mode Automatic adjustment of range and gain
(8) Display Mode High Frequency (HF), Low Frequency (LF), Dual (high and low

frequency 1/2 display on each), Zoom (high/low freq. And Zoom),

NAV (Graphical and numerical displays of water depth, water

temperature, ship ’s speed, L/L data, etc), and A-scope Display
(9) Zoom Display Marker Zoom, Bottom Zoom and Bottom-lock Expansion
(10) Display Advance Speed Lines/TX: Freeze, 1/8, 1/4, 1/2, 1/1, 2/1
(11) TX Frequency/ Output power

50 and 200 kHz (alternately transmitted), 300 W
(12) Pulse-length/TX rate

Display End Depth (m) 5 10 20 40 80 150 300
Pulse-Length (ms) 0.2 0.2 0.2 0.4 0.8 1.5 3.0
TX Rate (pulse/min) 600 600 600 375 187 100 50

(13) Interference Rejecter Rejects unwanted signals by comparing last and present echoes in

strength.
(14) Alarm Fish and Bottom alarms, Temperature alarm*
(15) Input/output data NMEA 0183 or CIF format

Input RMB, BWC, RMC, RMA, GLL, VTG, VHW, MTW, XTE
Output SDDBT, YCMTW*, VWVHW*, SDDPT
CIF Input L/L, Ship’s speed, Course, Waypoint ID, Range/bearing to Waypoint,
Water temperature, Cross-track Error

SP - 1

CIF Output Depth, Water temperature*, Ship’s Speed*
*: Speed/temperature sensor required.

2. POWER SUPPLY

(1) Display Unit 12-24 VDC (-10%, +30%): 2.5-1.25 A

3. ENVIRONMENTAL CONDITION

(1) Ambient Temperature 0°C to +50°C
(2) Relative Humidity 85% at 40°C
(3) Water proofing Display Unit: IPX4
(4) Vibration ±1 mm ±10%, 2(5) to 13.2 Hz,

Maximum acceleration 7 m/s2, 13.2 to 100 Hz

4. COATING COLOR

(1) Display Unit Chassis: 2.5GY5/1.5

Panel: N3.0 Newtone No.5

SP - 2

INDEX

Aeration........................................................ 3-2

Alarms

activating ................................................ 2-15

bottom .................................................... 2-14

fish ......................................................... 2-14

silencing buzzer...................................... 2-15

water temperature................................... 2-14

A-scope display ............................................ 2-9

AUTO key..................................................... 2-6

Automatic operation...................................... 2-6

Background color........................................ 2-14

Bottom alarm.............................................. 2-14

Bottom echoes.............................................. 3-1

Bottom zoom mode....................................... 2-3

Bottom-lock mode......................................... 2-3

BRILL key..................................................... 2-1

Brilliance....................................................... 2-1

Checking ...................................................... 4-1

Cleaning ....................................................... 4-2

Clutter ........................................................ 2-13

Default settings............................................. 4-5

Demonstration picture................................. 2-16

Depth measurement .....................................2-9

Diagnostics (self test) ................................... 4-4

Display mode................................................ 2-1

Dual frequency mode.................................... 2-2

Echo color .................................................. 2-14

Fish alarm .................................................. 2-14

Fish school echoes ....................................... 3-1

Fuse replacement......................................... 4-1

GAIN control................................................. 2-6

HF, LF mode................................................. 2-2

Hue ............................................................ 2-14

Indications .................................................... 1-2

Interference.................................................2-13

Main menu..................................................2-10

Marker zoom mode .......................................2-3

Menu

main menu description ............................ 2-11

menu selection ........................................2-10

system menu description .........................2-12

Menu tree..................................................... A-1

MODE switch ................................................2-1

Nav data enlargement ...................................2-5

Nav mode .....................................................2-4

Noise limiter ................................................2-13

Picture advance speed ..................................2-7

Power on/off..................................................2-1

Principle of operation........................................v

RANGE switch ..............................................2-7

SHIFT keys ...................................................2-8

SIG LEV key .................................................2-8

Speed indication correction .........................2-17

Speed sensor check ......................................4-5

Surface noise................................................3-2

System menu ..............................................2-12

Transducer

checking....................................................4-5

maintenance..............................................4-2

Troubleshooting.............................................4-3

VRM..............................................................2-9

Water temperature alarm.............................2-14

Water temperature graph.............................2-12

Water temperature indication correction.......2-17

Water temperature sensor check ...................4-5

White marker...............................................2-16

Zero line........................................................3-1

Zoom mode...................................................2-3

Index-1