9-52 Ashihara-cho,

Nishinomiya 662-8580, JAPAN

Pub. No. OME-23660

( YOSH ) FE-700

Your Local Agent/Dealer

FIRST EDITION : JAN. 2000

Q : DEC. 15, 2004

*00080890804*

*00080890804*

* 0 0 0 8 0 8 9 0 8 0 4 *

*OME23660Q00*

*OME23660Q00*

* O M E 2 3 6 6 0 Q 0 0 *

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.

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.

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.

Use the proper fuse.

Use of a wrong fuse can result in equipment damage and void the warranty.

CAUTION

Do not power the equipment when the transducer is in air.

The transducer may become damaged.

WARNING LABEL

A warning label is attached to the equip- ment. Do not remove the label. If the label is missing or illegible, contact

a FURUNO agent or dealer.

About the TFT LCD

The TFT LCD is constructed using the latest LCD techniques, and displays 99.99% of its pixels. The remaining 0.01% of the pixels may drop out or blink, how- ever this is not an indication of malfunc- tion.

Declaration of Conformity

iii

A Word to FE-700 Owners

Thank you for purchasing this navigational echo sounder. We are confident you will discover why FURUNO has become synonymous with quality and reliability.

Dedicated in the design and manufacture of marine electronics equipment for half a century, FURUNO Electric Company has gained an unrivaled reputation as a world leader in the industry. This is the result of our technical excellence as well as our worldwide distribution and service network.

Please carefully read and follow the safety information and operating and maintenance instructions set forth in this manual before attempting to operate the equipment and conduct any maintenance. Your navigational echo sounder will perform to the utmost of its ability only if it is operated and maintained in accordance with the correct procedures.

This equipment is designed, produced and documented by FURUNO ELECTRIC CO., LTD., complying with ISO 9001 standards as certified by the Lloyd??s Register of Quality Assurance System.

Features

The FURUNO FE-700 is comprised of display unit and transducer unit. Echo sounding data is displayed on the bright 6.5-inch color TFT (Thin Film Transistor) LCD display.

The main features of the FE-700 are

1.Complies with the IMO and ISO standards

MSC.74(69) Annex 4 and ISO9875.

2.Cost-effective; no paper, no consumables; high accuracy and high reliability - no rotating gears and belts as in the paper echo sounders

3.High-contrast 6.5-inch color LCD display featuring a wide viewing angle and adjustable brightness.

4.Wide variety of modes with never-get-lost default position.

5.Automatic function permits unattended adjustment of range, gain, and pulselength. The range scale and gain automatically change to display the bottom.

6.Position, course, speed, time are repeated from the external devices.

7.Alarms: shallow water, bottom lost, power drop

TRANSDUCER

: Standard Supply

: Optional Supply

: Local Supply

1.Turning on: Press the POWER Switch. Self-test starts, showing the condition of the logic circuits. The program number is displayed.

ROM: OK

DRAM: OK

SRAM: OK

BATTERY: OK

PROGRAM NO. 0252297002

2.Select a mode with the MODE Selector. The NAV position of the selector is recommended for general use. Display color is amber by default but may be customized. The unit of measurement is meters. You can freely select another mode at any time.

3.Turning off: Press the POWER Switch again.

Wait at least 5 s before reapplying the power.

Note: When two transducers are installed, make sure which transducer is used.

Note: When lat/long data input error occurs, ???EPFS??? ERROR appears on the screen. (EPFS: Electronic Position-Fixing System such as GPS receiver)

Note: Tone or brilliance must be adjusted within 10 seconds after pressing the BRILL key. Otherwise the tone and brilliance window will be erased.

1.5 Panel Dimmer

1.Press the DIM key. The panel dimmer setting window appears.

LOW - + HIGH

DIMMER: 5 ?? ?? ?? ?? ??

2.Press the [+] or [-] key for desired illumination of the control panel. Pressing DIM key also changes the illumination level.

3

1.6 Display Mode

The Mode Selector choose the display mode among NAV, DBS (depth below surface), HISTORY, LOGBOOK, OS DATA, HELP, and MENU.

CAUTION

DBS is not a water clearance below keel.

Do not use this mode in shallow waters to avoid grounding.

1.6.1NAV mode

The depth from the transducer to the seabed (bottom clearance) is shown on the screen. Note ???BELOW TRANSDUCER??? appears at the bottom of the screen in this mode.

Shallow depth alarm: 20 m

NOTE: These parameters can be customized to your preference and the last setting is used at a next switch-on. This is true on all other modes.

1.6.2DBS mode

The Depth Below Surface mode provides a draft-adjusted depth reading and will be useful in referencing to the nautical chart. The draft should be adjusted by the DRAFT key according to the actual draft value. If you find any difficulty to check for the draft value, use the NAV mode.

When the DBS mode is selected, the message ???Confirm and set ship???s draft to use DBS mode??? appears. Confirm ship's draft and set it by referring to section 1.12.

BELOW KEEL (when the draft setting is ???10.0 to ???0.1) or BELOW SURFACE (when the draft setting is 0 to 30.0) appears at the bottom of the display and the draft value appears at the upper right-hand corner in the DBS mode.

1.6.3HISTORY mode

This mode provides a mix of Contour and Strata displays. The Contour display can be scrolled over the past 24 h while the right side Strata display (layers of different colors according to reverberation strengths) shows the latest sounding for 5 minutes.

Pressing the [+] or [-] key moves the Contour display forwards or backwards, respectively.

HISTORY

History of the bottom

If the range scale for both the Contour and Strata display must be the same. If they are not, the message ???OUT OF RANGE??? appears.

The update of the contour data may take max. one minute. Wait for one minute to display accurate contour if you change the range scale.

1.6.4LOGBOOK mode

The LOGBOOK shows time, depth and own ship position in tabular form in a pop-up window. The logging is selected with the INTERVAL option on the menu among 5 s, 1 min and 2 min. (See section 2.6.)

There are 60 pages and the total memory capacity is 720 points. Page 60/60 is the latest data and 1/60 is the oldest data. Pressing [-] or [+] key changes the pages.

1.6.5OS DATA mode

This display mode indicates own ship position, GPS-derived course and speed, and time and depth in digital form. You can read the data of your particular interest in large characters. The screen continues to display the sounding data in the background. Part of graphical indication is visible to the right of data slips.

TRUE(true course) or

MAG (magnetic course) appears.

OS DATA

N

E

BT means Bottom track

There are two kinds of OS DATA displays: DATA 1 and DATA 2, as selected on the system menu. DATA 1 is the default setting, and it is shown in the figure above.

The DATA 2 display is as below.

TIME UTC

11:23:45

DEPTH

172 m

Enlarging data of interest

You can enlarge one of the data indications as follows:

1.Press the [???] or [???] key to select the data you want to enlarge. Current section is circumscribed with the blue cursor. For example, select the depth cell.

2.Press the [+] key.

DEPTH

172m

3.To return to the original display, press the [-] key.

1.6.7MENU display

The menu provides functions which normally do not require frequent adjustment. For details see Chapter 2.

CLUTTER

1.6.6HELP display

This mode provides information about keys. Press desired key to obtain the corresponding information. The example below shows help information for MUTE ALARM.

HELP MENU

MUTE

DRAFT ALARM

DIM BRILL

AUTO COLOR

- +

PRESS KEY.

MUTE ALARM

To set or acknowledge alarms:

1.Press MUTE ALARM key.

2.Press [-] or [+] key to set alarm depth.

3.Press MUTE ALARM key to silence

the alarm.

PRESS KEY.

Press the [???] key, and the following appears.

CAUTION!

SYSTEM MENU IS ONLY

FOR INSTALLATION. DO

NOT CHANGE SETTINGS.

GO TO SYSTEM MENU?

NO YES

2/2

???: To select item - +: To set option

6

1.7 Range Scale

If the depth goes out of the correct display area, increase or decrease the range until the seabed appears near the center of the screen.

Adjust the Range Control, and current range selection is shown in the range display window.

In the AUTO mode, the range scale is automatically adjusted. See section 1.9 for details.

1.8 Gain Control

The GAIN Control adjusts the sensitivity of the receiver. The AUTO mode provides automatic adjustment and you are normally not required to adjust it. Current setting is shown at the upper left-hand corner. Adjust the GAIN Control and the following window appears.

GAIN 5.5

Adjust the GAIN Control 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. Adjusting range is between 0.0 and 10.0 in 0.5 steps.

1.9 Automatic Operation

The automatic function automatically selects the proper gain, range scale and clutter level 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 seabed in specified color.

???Clutter level (on the menu), which works as a threshold control to suppress overall noise, is automatically adjusted.

Note: The AUTO MODE is cancelled whenever the range or the gain is changed.

How to enable/disable automatic operation

1.Press the AUTO key. The AUTO mode window appears.

AUTO MODE

OFF ON

-/ +: To set option

2.Press the [+] key to select ON or the [-] key to select OFF.

1.10Picture Colors

1.Press the COLOR key. The following window appears.

COLOR

- 1 2 3 4 5 6 7 8 9 +

2.Press the [+] or [-] key to select a number, referring to the table below. (You can see the result of your selection on the display.)

Monochrome (amber) is the default setting. The Strata display contains multiple colors depending on the reflectivity from underwater objects of the sounding pulses. Red is strongest, followed by brown, orange, yellow, blue, and light blue.

1.11 Shallow Depth Alarm

The shallow depth alarm sounds when the seabed is shallower than the preset depth. The default in the NAV position is 20 m. You can adjust the alarm depth as below:

Activating/deactivating the alarm

1.Press the MUTE ALARM key to display the depth alarm setting window.

DEPTH ALARM

10m

-/ +: To set option

2.Press the [+] or [-] key to change setting depth. The setting is shown digitally at the top of the screen and graphically key the depth alarm line.

When the alarm is activated, the message ???SHALLOW DEPTH ALARM??? is displayed at the center on the screen.

Note: When the draft setting is ???10.0 to ???0.1 in the DBS mode, the shallow depth alarm setting will show a minus value. At this time, the alarm setting value indication shows ???****??? and the alarm function is disabled.

Acknowledging the alarm

You can silence the alarm by pressing the MUTE ALARM key. The message ???SHALLOW DEPTH ALARM??? moves to upper side of the screen.

1.12 Draft

It is necessary to set the draft to use the DBS display mode, which shows depth below surface.

1.Select DBS with the MODE control.

???Confirm and set ships draft to use DBS mode.??? appears.

2.Press the DRAFT key to display the draft setting window.

0.0 m

-/+: To set option

3.Press the [+] key to increase the setting depth and [-] key to decrease it. The setting

depth is -10 to 30 m in steps of 0.1 m.

The above window disappears in 10 seconds.

The draft setting is displayed at the upper right corner and the range scale is shifted according to the draft setting.

2.1 Menu Overview

The menu has several functions for advanced operation.

1.Select MENU with the MODE Selector.

INTERFERENCE REJECT

OFF IR1 IR2 IR3

PICTURE ADVANCE

SLOW FAST

TREND INDICATOR

1/2

??????: To select item

-+: To set option

2.Press the [???] or [???] key to select menu item. As you operate the [???] or [???] key, the selected item and its current setting appear in reverse video.

3.Press the [-] or [+] key to select option desired.

4.Set the MODE Selector in another position to close the menu.

2.2Suppressing Low Level Noise

Light-blue dots may appear overall screen. This is mainly due to dirty water or noise. This noise can be suppressed by adjusting CLUTTER (in reality, Threshold of the amplifier).

When the automatic mode is on, the suppression setting is automatically adjusted. For manual override, do the following:

1.Select MENU with the MODE Selector.

2.Select CLUTTER by pressing the [???] key.

3.Press the [-] or [+] key to select clutter rejection level desired. The higher the number the higher the degree of suppression. Note that weak echoes may not be displayed when the clutter circuit is on.

2.3 Suppressing Interference

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

To suppress interference, do the following:

1.Select MENU with the MODE Selector.

2.Select INTERFERENCE REJECT by pressing the [???] or [???] key.

3.Press the [-] or [+] key to select degree of suppression desired; OFF, IR1, IR2 or IR3. The higher the number the greater the degree of suppression.

Note that oversuppression will weaken the sensitivity.

2.4 Picture Advance

The picture advance speed determines how quickly the vertical scan lines run across the screen.

1.Select MENU with the MODE Selector.

2.Select PICTURE ADVANCE by pressing the [???] or [???] key.

3.Press the [+] or [-] key to select speed FAST or SLOW, respectively. The advance speed varies with the range scale and the viewing length of 15-16 minutes is available on all ranges (IMO requirements).

2.5 Trend

The future trend of the seabed depths can be predicted over a specified period of time (See page 13). The trend index is set with the item TREND and appears at the top left corner. The default setting is ON.

?? is inclination angle of bottom.

2.6 Interval

The interval for sampling data for the LOGBOOK and HISTORY modes can be set with INTERVAL, among 5 s, 1 min and 2 min. The default setting is 1 min.

In this example, the setting of INTERVAL is

1 minute. That is, the depth and lat/long data are displayed at 1 minute intervals.

3.1 System Menu

The system menu should be set just after installation and is not always necessary to be adjusted. If you change any items of the system menu or even if you open the system menu, the sounding picture will be cleared. There are three menus: 1,2,and 3.

1.Select MENU with the MODE Selector.

INTERFERENCE REJECT

OFF IR1 IR2 IR3

PICTURE ADVANCE

SLOW FAST

1/2

??????: To select item

-+: To set option

2.Press the [???] key several times to display following window.

CAUTION!

SYSTEM MENU IS ONLY

FOR INSTALLATION. DO

NOT CHANGE SETTINGS.

GO TO SYSTEM MENU?

NO YES

2/2

??? : To select item

-+: To set option

3.Select YES by pressing the [+] key.

Confirmation message ???ARE YOU SURE???? appears.

4.Press the [+] key again.

The system menu 1 appears.

5.With the cursor selecting MENU SELECT, operate the [-] or [+] key to select system menu desired; 1, 2 or 3.

SYSTEM MENU 1

??????: To select item

- +: To set option

Select other mode to exit.

??? Press [+] at menu 1. ??? Press [-] at menu 2.

SYSTEM MENU 2

01 JAN 2001 00:00:00

??????: To select item

- +: To set option

Select other mode to exit.

??? Press [+] at menu 2. ??? Press [-] at menu 3.

SYSTEM MENU 3

3.2 System Menu 1

DEPTH UNIT: Selects unit of depth measurement among meters, feet, or fathoms. Default setting is meters.

If "ft" or "fa" is selected, the depth unit is shown in red characters.

SPEED UNIT: Selects unit of speed measurement among knots, statute miles per hour, or kilometers per hour. Default setting is knots. Requires speed data, from external device.

COURSE: Selects heading reference; true or magnetic. Default setting is TRUE.

BOTTOM LOST: Turns on or off the bottom loss warning. ???ALARM??? sounds the alarm if the bottom signal is not detected. Default setting is ???ALARM??? (alarm is enabled).

GPS ALARM: The audible alarm may be released when the position-fixing mode is switched from DGPS to GPS and vice versa. Default setting is ???ALARM??? (alarm is enabled). Choose ???OFF??? if you do not need to be alerted with the audible alarm when the position-fixing mode is switched.

INTERFACE: Selects I/O signal format between the FE-700 and external equipment; IEC format ???1:95??? (1995 version) or ???1:98??? (1998 version), or NMEA format. Default setting is IEC ???1:98???.

When selecting the ???1:98???, DPT has max. range in use (See page 24).

ALARM SOUND: Selects audio alarm sound among 1, 2 or 3. Default setting is 1.

1:Continuous sound

2:Intermittent sound; 0.5 s on and 0.5 s off.

3:Intermittent sound; 1 s on and 1 s off.

OS DATA: Selects own ship data display mode; DATA 1 or DATA 2. DATA1 is the default setting. If a navigation device is not connected to the FE-700, select DATA 2.

LANGUAGE: Currently English is only available.

3.3 System Menu 2

TIME ADJUST: Selects internal clock or external clock (UTC clock). Default setting is INTERNAL. For INTERNAL, set current day, month, year, hour, minute and second with [+], [-], [???] or [???] key. The setting clock appears and it counts upward.

SYSTEM MENU 2

01 JAN 2001 00:00:00

??????: To select item

- +: To set option

Select other mode to exit.

If EXTERNAL is selected, the screen changes as follows.

SYSTEM MENU 2

0:22:40

??????: To select item

- +: To set option Select other mode to exit.

TIME DIFFERENCE: Selects auto (UTC) or manual. Auto uses the time difference in ZDA (IEC 61162-1). In manual, it is necessary to enter the time difference in hours and minutes.

SYSTEM MENU 2

0:22:40

??????: To select item

- +: To set option Select other mode to exit.

3.4 System Menu 3

RANGE 1- 8: Activates or deactivates specific range scales. Default ranges are 5, 10, 20, 40, 100, 200, 400, and 800 (meters). Setting area is 2 m to 800 m. The ranges 20 m and 200 m can not be changed. They are essential in this equipment.

Note: Ranges must be set in numerical order. For example, if range 1 is 5 m and range 3 is 20 m, range 2 should be between 6 and 19 m.

Trend: The trend index shows the probable bottom shape over a specified time within 1-10 minutes. The default setting is 1 minute.

Set the Trend time with [+] or [-].

13

This chapter describes functions useful for improving echo sounding performance.

4.1 Demonstration Display

The demonstration program shows how the FE-700 works.

1.Turn off the equipment.

2.Press the POWER Switch while pressing any key. Release the key when the following EXTENSION MODE display appears.

EXTENSION MODE

+ : TRANSDUCER SETTING

- : TEST

???: CLEAR MEMORY

???: DEMONSTRATION

SELECT MODE

3.Press the [???] key to select

DEMONSTRATION.

DEMONSTRATION

4.Press the [+] key to select ON.

5.Reset the power. "DEMO" appears above the depth indication on the echo sounder displays and at the top right-hand corner on the data and graphic displays.

!To return to the normal operation, select OFF at step 4 above. Restart the display unit after waiting 5 s.

4.2 Transducer Setting

After installing the equipment, set the transducer as follows.

1.Press the [+] key at the EXTENSION MODE display. The following window appears.

TRANSDUCER SETTING

??????: To select item

-+: To set option

2.Set as follows by using [???] or [???] to select an item and [+] or[-] to set option.

a)If only one transducer is installed, set XDR FORE field to 50 kHz or 200 kHz, according to actual installation. Leave the XDR AFT field as ??N/A.??

b)If two transducers are installed via the switch box EX-8, set XDR FORE field and XDR AFT field to 50 kHz or 200 kHz, according to actual installation.

3.Reset the power.

Note: The default settings in the TRANSDUCER SETTING window are N/A. At the first power-up after installation, the window appears to set transducer(s).

4.3 Bottom Level

If the depth indication is unstable or the seabed cannot be displayed steadily notwithstanding the adjustment of the control panel, you may adjust the bottom echo level.

CAUTION

If the level is set too low, the FE-700 may not be able to distinguish the bottom from fish echo and the depth indication may be unstable and if set to high the depth indication does not appear.

1.Press the MUTE ALARM key three times at the EXTENSION MODE. The start-up screen appears and shortly thereafter the BOTTOM LEVEL display appears.

BOTTOM LEVEL

200kHz = 80 (20??? 200)

-+: 200kHz*

*: Either 200 kHz or 50 kHz is displayed depending on which frequency is used.

2.Set the level with the [+] or [-] key. The default level is 80.

3.Press the POWER switch to finish the adjustment. Wait about 5 s and then turn on the power again.

4.4 TVG Level

TVG (Time Varied Gain) compensates for propagation attenuation of the ultrasonic waves, reducing surface noise to provide a smooth display. The TVG lowers receiver sensitivity at the time of pulse emission and gradually increases it with time, thereby making objects of same reflectivity at different depths appear at the same intensity or colors on the display. The TVG working depth is down to approximately 150 m on the 200 kHz system and 350 m on the 50 kHz

system. Outside this range the echoes from the seabed and fish schools are received in full level. There is no perceivable deterioration in performance.

1.Press the DRAFT key three times at the EXTENSION MODE display. The TVG SELECT window appears.

TVG SELECT

200kHz = 5 (0??? 9)

-+: 200kHz

2.Set the TVG curve with [+] or [-]. The default level is 5. Attenuation compensation curve is at 20LogR curve.

3.Press the POWER switch to finish the adjustment. Wait 5 s, and then turn it on again.

4.5 Echo Offset

The echo offset feature functions to compensate for too weak or too strong echo level. If the on- screen echo level appears to be too weak or too strong and the level cannot be adjusted satisfactorily with the GAIN control, do the following to adjust echo level.

1.Press the DIM key three times at the EXTENSION MODE display. The ECHO OFFSET screen appears.

ECHO OFFSET

-+: 200kHz

2.Set the offset with [+] or [-]. The default value is 0.

3.Press the POWER switch to finish the adjustment. Wait about 5 s and then turn it on again.

Omnipad

MENU ENT

DISP DIM

*

PWR

2.Press [] or [] until the required value is reached. The range of adjustment is from 0 (Min.) to 63 (Max.). The default is 48.

3.Press the ENT key to set.

Note: The contrast is automatically set to the default when you turn on the power.

5.1.4 DEPTH MODE

The Digital Depth Indicator FE-720 is an optional remote display. The panel illumination can be locally adjusted on the control panel or on the optional hand dimmer box.

5.1 Basic Operation

5.1.1 Turning on

Press the POWER key. The unit beeps and starts up with the last-used display. To turn off the unit, press the POWER key again.

5.1.2 Adjusting panel dimmer

1.Press the DIM key.

2.Press [] to increase the dimmer or [] to decrease it. The default is level 4.

3.Press the ENT key to finish the adjustment.

5.1.3Adjusting Contrast

1.Press the [??? ] key. The following window appears.

CONTRAST (0-63)

48

EXIT: [ENT]

Depths are read either below transducer (keel) or below seaface irrespective of the main display. Select the mode as below:

1.Press the DISP key to select the wanted mode. The mode changes as below with each press.

DEPTH FORE 50kHz

123 m

BELOW TRANSDUCER

Depth below transducer

DEPTH FORE 50kHz

128 m

BELOW SURFACE*

DRAFT: 5.0 m

Depth below surface. Draft is determined on the main Display Unit FE-701.

*: If the draft setting is ???10.0 to -0.1 (refer to page 8.) BELOW KEEL is displayed instead of the BELOW SURFACE.

5.2Menu Operation

5.2.1Dimmer control

The dimmer is controlled either with the DIM key, or the optional Dimmer Controller. The method of control must be selected on the menu.

1.Press the MENU key to display the main menu.

2.Press [???] or [???] to select DIM CONTROL.

3.Press the ENT key. The following window appears.

4.Press [???] or [???] to select option desired.

PANEL ONLY: The illumination of the control panel is adjusted with the DIM key.

EXT CONTROLLER: Illumination of control panel is adjusted with the optional dimmer controller (hand dimmer box). The DIM key is inoperative.

EXT DISP: Not used.

5.Press the ENT key to set.

6.Press the MENU key to finish.

5.2.2 Selecting language

The language in use on the screen is either English or Japanese.

1.Press the MENU key to display main menu.

2.Press [???] or [???] to select the /LANG.

3.Press the ENT key. The following window appears.

ENGLISH

4.Press [???] or [???] to select appropriate option. The default is English.

5.Press the ENT key to set.

6.Press the MENU key to finish.

5.2.3Selecting the unit of depth measurement

The unit of depth measurement is separately selected from the Main Display FE-701.

1.Press the MENU key to display main menu.

2.Press [???] or [???] to select the UNITS.

3.Press the ENT key. The following window appears.

m ft fa

4.Press [???] or [???] to select unit. The default is meter (m).

5.Press the ENT key to set.

6.Press the MENU key to finish.

5.2.4Alarm

You can set turn alarm on or off. In the ON mode, if the main display unit activates the alarm, the FE-720 also.

1.Press the MENU key to display main menu.

2.Press [???] or [???] to select ALARM.

3.Press the ENT key. The following window appears.

ON

OFF

4.Press [???] or [???] to select appropriate option. The default is ON.

5.Press the ENT key to set.

6.Press the MENU key to finish.

If the alarm sounds, press any key to silence it.

4.With YES selected, press the ENT key to start the test. The equipment tests the ROM and RAM, displaying the results as OK or NG (No Good). If NG appears, contact your dealer for advice.

TEST

ROM : OK

RAM : OK

PUSH KEY (STOP: PWR OFF)

CNT: 001 65-5-0100-003

5.After "PUSH KEY" is displayed, press each key one by one. The name of the key pressed momentarily appears if the key is functioning properly.

The display shows the following message to inform you that the program is now going to check the LCD.

The diagnostic test checks ROM, RAM, keys and LCD of the FE-720.

1.Press the MENU key to display main menu.

2.Press [???] or [???] to select TEST.

3.Press the ENT key. The following window appears.

TEST START?

(STOP : PWR OFF)

ARE YOU SURE?

YES NO

<LCD CHECK>

ALL ON 2 SEC

ALL OFF 3 SEC

The whole display brightens for 2 seconds then turns off for 3 seconds. Test repeats. CNT, which is number of times the test has been consecutively executed, is counted up.

6.To stop the test, turn off the power.

5.4 Factory Setting

You can restore default settings to start operation anew. Press the POWER switch while pressing [???]. The message "RESET BACKUP DATA!" appears. After a while, all default settings are restored and the depth indication appears.

18

WARNING

Do not open the cover.

There are no user-serviceable parts inside. Refer any repair work to a qualified technician.

6.3 Transducer Maintenance

Marine life on the transducer face will result in a gradual decrease in sensitivity. Check the transducer face for cleanliness each time the ship is dry-docked. Carefully remove any marine life with a piece of wood or fine-grade sandpaper.

6.1 Checking

Regular maintenance is essential for good performance. Checking the items listed in the table below on a regular basis will keep the equipment in good shape for years to come.

6.2 Cleaning the Display Unit

Dust or dirt on the display unit should be removed with a soft cloth. If desired a water-moistened cloth may be used. Do not use chemical cleaners; they can remove paint and markings.

6.4 Replacing the Fuse, Battery

If a fuse blows, find the cause before replacing it. Use only designated fuses. Using the wrong fuse will damage the unit and void the warranty.

Three types of fuses are used in the distribution box FE-702.

The Digital Depth Indicator FE-720 uses one fuse of 1 A, which is inserted in the positive line of interconnection cable.

A battery installed on a circuit board inside the display unit preserves data when the power is turned off. The life of the battery is about three years. When the battery voltage is low, ???battery??? NG appears at the self-test. When this happens, contact your dealer to request replacement of the battery.

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6.6 Diagnostic Test

The diagnostic test checks the ROM, RAM, color bar and keyboard for proper operation.

1.Turn on the power while pressing any key. Release the keys when the following display appears.

EXTENSION MODE

+ : TRANSDUCER SETTING

- : TEST

???: CLEAR MEMORY

???: DEMONSTRATION

SELECT MODE

6.7 Test Pattern

The test pattern is used to check color performance.

1.Turn on the POWER SWITCH while pressing any key.

2.Press the BRILL key three times. Press the BRILL key again to change the test pattern as below.

BLACK

2.Press the [-] key.

BATTERY : OK

PROGRAM No.: 0252297002

Key status

Position of Range knob Gain knob setting Position of Mode knob

???

WHITE

???

BLK RED GRN Blue YEL PPL Aqua WHT

3.The ROM, DRAM, SRAM and internal battery are checked and the results are displayed as OK or NG (No Good).

If NG appears, contact your dealer for advice.

4.Press and release each key (except the POWER switch) one by one. If the key is normal, its on-screen location lights in black while the key is pressed.

5.Operate the controls. The RANGE and MODE control setting indications should be the same as actual control settings. The GAIN control setting indication should be between 0 and more than 230.

6.Press the POWER SWITCH to finish. Turn on the power again to resume operation.

???

3.Press the BRILL key again to return to the EXTENSION MODE menu.

HEATSINK

MAIN BOARD 02P6280

ANLG 02P6281

INTERFACE