JRC JFC-7050 Operation Manual

Echo Sounder/Fish Finder

JFC-7050

- High resolution - high accuracy

- Dual frequency(50/200KHz)

- Fully automatic(gain, range, etc)

- Alarm & A-scope

- Fast and easy operation

TABLE OF CONTENTS

Important Notice 1

Echo sounder System

Welcome 5

Introduction 7

Keypad 9

How to use [ Power / Brightness ] 10

Display Unit 11

SPEC of the connectors 12

Display

Screen 13

FF + Highway 14

FF + Steering 15

Operation

Mode 16

Gain 17

Select Page 18

Customize of screen 19

Customize of data bar 20

Navigation data edit 21

Menu 22

1. Range

2. Shift

3. Display

4. Rejection

5. Color

6. Pulse

7. Output Power

8. Alarm

9. Setup

0. Others

VRM 33

Installation

Display Unit Location 34

Power Connection 35

Sensor Connection 35

Transducer Installation 36

Transom Mounting 37

Transom Transducer Maintenance 37

Through-hull Transducers 38

Dead-rise 39

Through-hull Transducer Maintenance 40

- 1 -

Pictorials

This manual uses the following symbols for easy understanding safety instructions. Always follow
these instructions carefully.

WARNING

Always follow this safety instruction to prevent death or injury.

CAUTION

Follow this safety instruction to avoid possible injury or damage to your
property.
Symbol “” is a CAUTION or WARNING label indicating the safety
instruction.

WARNING

This symbol is an Electrical Shock WARNING label.

Symbol is an instruction that you must not violate.
(This symbol instructs NOT to disassemble the system components)

Symbol is an operation instruction that you must follow.
(This symbol shows the main power OFF instruction.)

WARNING <For System Operators>

Always follow this instruction to prevent death or personal injury.

Turn power off
During
abnormality.

If smoke or a small of burning occurs, a fire or an electrical
short circuit may result. Turn the power switch OFF and
shut down the power supply immediately. Never try to repair
the system yourself. Call for service.

Do not open
Cabinet.

High voltage exists in the instrument. Contact with voltage
may cause possible injury or death.

Do not touch
back
side of the
equipment.

Harmful line voltage is present on back side of the
equipment. Never try to touch back side while power is
turned on.

Avoid excessive
shock to
display unit.

The LCD display module contains a liquid. Do not apply any
mechanical shock to the display. If the display broken, liquid
may leak and injure your skin and eyes.

Do not use with
poor
ventilation.

If you cover this unit or use in an enclosed place, it may
malfunction or become damaged as a result of overheating.
Use only where there is sufficient ventilation.

- 2 -

Installation Cautions <For service Personnel>

Follow installation instructions to avoid personal injury and system malfunction.

Installation in
rigid location.

Mount your JFC-7050 on a rigid frame or base to prevent your unit from
working loose.

Use correct
Installation
materials.

Use the installation materials provided in the standard accessory pack
only. If you use hardware of insufficient strength, your system may
loosen causing damaged.

Keep away from
direct sunlight.

Keep your system out of direct sunlight as it may become damaged by
overheating.

Keep away from
water.

Take care not to get water on or in your unit as it may be damaged
and/or cause an electrical shock.

Keep away from heat
source.

Keep your system away from other heat source as it may malfunction,
be damaged, or burn.

Use correct power
source.

Operate your system within the specified power voltage. An incorrect
power supply may cause

Maintenance Cautions<For Maintenance Personnel>

Use the following safety precaution internal inspection.

Discharge capacitors.

High voltage may be retained in the capacitors if the high-tension
circuit several minutes after you have turned the power switch off.

Check that power is

OFF

To prevent an electrical injury due to erroneous power switching, make
sure that the main power supply and the system power switch are both
in the off position. Additionally, attach a safety label showing that
service is in progress.

Avoid EMI.

Take care not to damage the ESDs (Electrostatic Sensitive Devices)
by static electricity from carpet and cloths.

Avoid dust.

Wear a safety mask so as not to breath in dust during inspection or
cleaning inside your system instruments.

- 3 -

Operation Notes <For operators>

Observe the following operation notes, otherwise the system failure or deterioration can result. And
periodical inspection and maintenance are required for keeping the system in an optimum condition.

Backup important data.

The waypoint and other registered data may become unreadable by
unexpected failure. We recommend recording this data separately.

Use correct transducer
only.

If you use incorrect transducer, the transmitter circuit may be
damaged due to a matching error. Consult is for system information.

Check transducer
Connection before
power on

Do not turn the power switch ON if the transducer is disconnected or
if it is not inserted into the water. If done, the transducer or
transmitter circuit may be damaged.

Always clean
the transducer

Since transducer performance can drop due to accumulated bottom
growth, keep the transducer clean. Never paint transducer surface.

Transducer must be
installed by authorized
personnel.

Consult us for transducer installation by authorized personnel.

WARNING

This product is designed to assist a navigation.
When you are sailing, use the certified chart from the Government or
IMO.

- 4 -

- 5 -

Echo sounder System

Welcome

JFC-7050 Echo Sounder / Fish Finder (called Echo Sounder) opens a new chapter of performance
and integration in vessel navigation system display and management. Whether you are a Cruiser or
Sport fisherman or both, JFC-7050 gives you the information you need.

CAUTION

JFC-7050 is Color LCD Charting Systems employs the latest in proven technology to provide accurate
navigation information. The Plotter functions of JFC-7050 are totally dependent upon the capability of
the navigation source to provide accurate position information. This device is only an aid to navigation.
It should be used in conjunction with all other navigation accuracy. For safety, always resolve any
uncertainty before continuing navigation.

CAUTION

The performance of LCD displays are degraded by continuous direct exposure to ultraviolet rays.
Locate your JFC-7050 Display away from direct sunlight. When not in use. Keep the display covered.

DISPLAY BREAKAGE WARNING

The LCD display module contains a liquid. If the display is broken and the liquid contacts your skin,
wash it off immediately in running water for 15 minutes. If the liquid contacts your eyes, immediately
flush your eyes with running water for 15 minutes. Contact a physician if any abnormal symptom is
experienced.

- 6 -

- 7 -

Echo sounder System

Introduction

The JFC-7050 is a premium multifunction command and control center. JFC-7050 front panel
keyboard and its wide screen with wide viewing area make placement easy. Although JFC-7050 offers
many advanced features, operation is simplified through the use of popup menus similar to those
found on personal computers.

Standard Equipment Configuration List

Display unit

Manual

Power cable

Protector

Mounting Bracket

Knobs

- 8 -

Echo sounder System

Option

Transducer

Model Name

Airmar Part No.

JRC Code

B45 TRANSDUCER

31-272-14-01

5AWBF00001

P58 TRANSDUCER

31-498-3-01

5AWBF00002

P319 TRANSDUCER

31-323-14-01

5AWBF00003

B60-20 TRANSDUCER

31-556-8-02

5AWBF00004

Type：B45 Thru-Hull（8pin-A Female)

Depth＋Temp

TVR(50)：155 RVR(50)：-174

TVR(200)：164 RVR(200)：-184

Type：P58 Transom Mount（8pin-A Female)

Depth＋Temp＋Speed

TVR(50)：153 RVR(50)：-164

TVR(200)：173 RVR(200)：-182

Type：P319 Thru-Hull（8pin-A Female)

Depth＋Temp

TVR(50)：154 RVR(50)：-179

TVR(200)：164 RVR(200)：-184

Type：B60-20 degrees Thru-Hull（8pin-A Female)

Depth＋Temp

TVR(50)：155 RVR(50)：-174

TVR(200)：164 RVR(200)：-184

- 9 -

Echo sounder System

Keypad

KEY

Description

[Cursor

Key]

With MENU : Choosing the menu.
Without MENU : Choosing the frequency.
(50/200KHz)

[GAIN/STC]

&

[ENTER]

Button : Enter when menu table on the screen.
Rotary : Adjustment of gain level with turning.

[+] &[-]

Setting up the depth range, when depth range
sets “manual range”.

[MENU]

Calls up Menu

[MODE]

Setting up Echo sounder mode

[CANCEL]

Return to the previous display, or canceled the
set-up.

[FUNC]

Setting up Using Frequently key function

[EVENT]

Choose the Active,Waypoint, setup Nav or
capture functions for using one function.

[VRM]

Press the VRM key, and show the bar for the

depth range.

[ PWR / BRT ]

- 10 -

Echo sounder System

How to use [Power/Brightness]

 Press [PWR/BRT]

1. Use PWR:

Press [PWR/BRT] shortly to turn on Power.

To turn off the power, keep pressing the [BRT/PWR] until the end of counting.

2.Use BRT:

Press [BRT/PWR] shortly and the brightness can be controlled. Use the arrow keys [←][→]of the

cursor to control the brightness and the contrast.

3. Use day/night mode

Press [BRT/PWR] shortly and change mode. Use the arrow keys [↓][↑] of the cursor to change mode.

Choosing the frequency on the dual

 Press [↑][↓]

You can see the red color is moving with the up and the down. In the active frequency in the red, it’s

on operation.

Choose the Gain & STC

 Press [←][→]

You can see the red color is moving with the right and the left. In the active Gain & STC in the red, it’s

on operation.

- 11 -

Echo sounder System

Display Unit

<Front>

<Rear>

7 inch Color LCD

Keypad

Knob

Mounting Bracket

Connector

- 12 -

Echo sounder System

SPEC of the connectors

- 13 -

Display

Screen

High Frequency

Depth bar

Low Frequency

Data bar

Red color : It is selected to

setup Frequency

- 14 -

Display

FF + Highway

The highway display provides a 3D view of own ship’s progress toward destination (waypoint).

Destination waypoint name

Destination

waypoint

Bearing from own

Course Over

Ground

Range from own

ship to destination

Speed Over

Ground

XTE Alarm Radius

XTE of Vessel

XTE Alarm Radius

- 15 -

Display

FF + Steering

The steering display provides steering information such as ship’s speed, course, range, bearing, TTG.

Destination waypoint

name

Bearing from

own ship to

Speed Over Ground

Range from own

ship to destination

Time-To-Go to destination

Bearing from own

Course Over Ground
Cross-Track-Error

- 16 -

Operation

Mode

Echo sounder modes are selectable for single frequency or dual and some functions, for example

bottom zoom or lock.

 Press [MODE]

1. Normal (200KHz or 50KHz)

Normal mode (with Auto Range active) displays the sounder image with the surface at the top of

the screen and the sea bottom in the lower part of the screen. The depth scale indicates the depth

range appearing in the display. Bottom contours and fish echoes are displayed at the depths where

they are detected. If the depth Range is set manually to a value less than actual water depth, sea

bottom echoes are not displayed, but all other echoes within the Range setting are displayed.

2. Bottom Zoom (200KHz or 50KHz)

Bottom Zoom magnifies the sounder display from the sea bottom toward the surface for a short

distance. The sea bottom contour is displayed and additional contour lines are added at intervals

above the sea bottom to aid in determining distances of echoes near the bottom. Use the Sounder

Menu to set the magnified Bottom Range from 2.5 to 20m (10 to 60ft.). Default setting is 10m (40ft.).

If the depth Range is set manually, the setting must place the sea bottom echo in the lower portion

of the screen for Bottom Zoom to be effective.

3. Bottom Lock (200KHz or 50KHz)

Bottom Lock divides the Echo sounder main screen image for the selected Echo sounder into two

sections. The left hand section displays a Normal Mode image. The right hand section of the screen

displays the Echo sounder image relative to the sea bottom. The sea bottom appears as a straight

line with the Echo sounder image magnified for a short distance toward the surface. A scale

appears on the right for estimating distances of echoes near the bottom. Use the Echo sounder

Manu to set the magnified Bottom range from 2.5 to 20m (10 to 60ft.). Default setting is 10m (40ft.).

If the depth Range is set manually, the setting must place the sea bottom echo in the

lower portion of the screen for Bottom Lock to be effective.

Echo sounder modes are selectable for single frequency or dual and some functions, for example

bottom zoom or lock.

- 17 -

Operation

4. Normal (200KHz and 50KHz)

The high frequency (200KHz) displays on the left and the low frequency (50KHz) Normal displays

on the right, which increase the accuracy of a fish school and your decision to catch fishes.

5. Bottom Zoom (200KHz and 50KHz)

The high frequency (200KHz) displays on the left and the low frequency (50KHz) Bottom Zoom

displays on the right, which increase the accuracy of a fish school and your decision to catch fishes.

Gain

Setting up the gain.

1. Auto / Manual Gain

 Press [GAIN/STC]

Press the button changes Auto Gain / Manual Gain.

(* Setting is available individually)

2. Set Gain

 Tune [GAIN]

Turn to the left, the gain level will be decreasing. Turn to the right, the gain level will be

increasing.

(It is applied Auto Gain Adjustment, when the mode sets “Auto gain mode”)

- 18 -

Operation

Select Page

Select [Page] menu and then go to “Pages” screen

Selectable Pages by red box and then press [ENTER] key.

red box

- 19 -

Operation

Customize of screen

Press [FUNC] key for 3 seconds on the Pages which selected red box.(*Refer Fig. 1.1.1 as below)

Select the layout of the formation of screen.(*Refer Fig. 1.1.2 as below)

Select displays .(*Refer Fig. 1.1.3 & 1.1.4 as below)

<Fig. 1.1.1>

<Fig. 1.1.2>

<Fig. 1.1.3>

<Fig. 1.1.4>

- 20 -

Operation

Customize of data bar

 [MENU] -> Setup -> Customizing -> Databar -> Edit

Select the section to edit by red box. .(*Refer Fig. 1.2.1 as below)

Press [ENTER] key and select the data as a user want.(*Refer Fig. 1.2.2 as below)

Finish the formation of data bar, press [CANCEL] key to complete.

<Fig. 1.2.1>

<Fig. 1.2.2>

- 21 -

Operation

Navigation data edit

 [MENU]-> Setup->Customizing->Navigation Data->edit

Select the section to edit .(*Refer Fig. 1.3.1 as below)

Press [ENTER] key and select the data as a user want. .(*Refer Fig. 1.3.2 as below)

Finish the formation of data bar, press [CANCEL] key to complete

(* If no navigation data on present activated display, it is not available to edit)

<Fig. 1.3.1>

<Fig. 1.3.2>

- 22 -

Operation

Menu

The menu and explanation of operation are displayed.

 Press [MENU]

1. Depth Range

JFC-7050 selects the best condition for measuring the depth automatically in the environment of the

sea. Or the user selects measuring the depth by Manual in the menu.

( The default setting is Auto.)

2. Shift

A user selects this function to see more detailed bottom of the sea. When you turn up the shift, the

range of Sounder shall go up from the shift range. For example, if you raise 5m of shift at 20m range,

the surface shall start 5m and the bottom range shall be 25m.

( The default setting is 0m.)

3. Display

3.1. A-Scope:

A-scope shows the research under the water by a scope to see the environment under the water.

( The default setting is Off.)

3.2. Image Speed

Select the speed of Sounder image from 4X until stop.

( The default setting is 1X.)

3.3. White Line

It is necessary to research a detailed fish on the bottom or a seaweed under the sea. The color of the

bottom changes into white or black to see the bottom easier than red.

( The default setting is Off.)

3.4. Bottom Zoom Range

Select the range of the bottom zoom or lock. It is necessary to modify the bottom.

( The default setting is 10m.)

- 23 -

Operation

3.5.Depth

3.5.1. Display

On/Off the depth range on the screen.

( The default setting is On.)

3.5.2. Font Size

Select the depth range font size on the screen.

( The default setting is Large.)

3.6.TEMP

3.6.1. Display

On/Off the temperature on the screen.

( The default setting is Off.)

3.6.2. Font Size

Select the temperature font size on the screen.

( The default setting is Large.)

3.7. Speed

3.7.1. Display

On/Off the speed on the screen.

( The default setting is Off.)

3.7.2. Font Size

Select the speed font size on the screen.

( The default setting is Small.)

4. Rejection

4.1. Interference Rejection (from engine)

When there are another boats around you on sailing, your sounder could be disturbed to work. The

step of the function is from off to level 2. The bigger number, the more rejection.

( The default setting is Off.)

- 24 -

Operation

4.2. Noise Rejection

Your Echo sounder could be disturbed by the engine noise. This function can reject the noise from

the engine or other machinery instruments.

( The default setting is Off.)

5. Color

5.1. Bottom Color Level

This function adjusts the colors. Make it upper level, the color becomes darker.

( The default setting is Off.)

5.2. Color Rejection

There are 16 color levels for Echo sounder. The color bar is on the left of the Echo sounder. If the

level is higher, the color of the bar is deleted one by one.

5.3. Screen Color

Select the back ground color of the Echo sounder for your convenience.

6. Pulse

Select the pulse of the output from the transducer. Levels are among Low, Medium and High, which

depends upon the depth. Low is proper to research precise a fish school but it is not suitable to

measure a deep depth. High is opposite from Low.

( The default setting is Medium.)

7. Output Power

Select the output from the installed transducer. Levels are from off to 3. It should be careful about

the depth. If you set high level in a sallow depth, the Fish finder screen turns to red. You see

nothing expect red on the screen.

( The default setting is 3.)

8. Alarm

8.1. Depth

8.1.1. Deep Alarm

It alarms when the set deep depth is out of the range.

( The default setting is Off.)

- 25 -

Operation

8.1.2. Deep Range

Setup the range of deep depth alarm

( The default setting is 0m.)

8.1.3. Shallow Alarm

It alarms when the set shallow depth is out of the range.

( The default setting is Off.)

8.1.4. Shallow Range

Setup the range of shallow depth alarm

( The default setting is 0m.)

8.2. Temp(Temperature)

8.2.1. High Alarm

It alarms when the set high temperature is out of the range.

( The default setting is Off.)

8.2.2. High Range

It alarms when the set high temperature is out of the range.

( The default setting is 0.)

8.2.3. Low Alarm

It alarms when the set low temperature is out of the range.

( The default setting is Off.)

8.2.4. Low Range

It alarms when the set low temperature is out of the range.

( The default setting is 0.)

8.3. Fish-School

8.3.1. Alarm

It alarms when it detects school of fish.

It will detect school of fish depend on set depth, range and level of the Echo sounder.

( The default setting is Off.)

8.3.2. Alarm Depth

If the alram is on, It is available to setup the depth of the Fish-school

( The default setting is 10m.)

- 26 -

Operation

8.3.3.Alarm Range

If the alram is on, It is available to setup the Range(hight) of the Fish-school.(The bar, next of

display is shown)

( The default setting is 50m.)

8.3.4. Alarm Interval

If the alram is on, It is available to setup the alarm interval.

( The default setting is Middle)

8.3.5. Color Level

If the alram is on, It is available to setup the color level.

It is available to setup the color level.

9. Setup

9.1. System

It contains ID and the program version, and it has important information for maintenance and upgrade.

9.2. Unit

9.2.1. DIST/Speed

Select desired unit of measure for distance and speed. Choose from: nautical mile/knots (nm/kt),

kilometer/kilometers per hour(km/kmh), yard/knot(yd/kt).

cf) 1nm = 1.852km, 1kt /h= 1.852km/h, less than 1nm display in yard and over 1nm display in mile

(☞ The default setting is Nm/Kt.)

9.2.2. Depth

Select desired unit of measure for depth of water. Choose from: meter(M), foot(ft), fathom(fm),

Italian Fathom(Ifm), Japanese fathom(Jfm).

cf) 1m = 3.281ft = 0.549fm = 0.609lfm = 0.660jfm

(☞ The default setting is m.)

9.2.3. TEMP

Select desired unit of measure for temperature of water. Choose from: Celsius(℃), or Fahrenh

eit(℉).

cf) 1℃ = +32℉

(☞ The default setting is ℃.)

- 27 -

Operation

9.3. Time/Date

9.3.1. Reference

Available to adjust the collect local time by the UTC time from the GPS.

( The default setting is incorrect every the country.)

9.3.2. Time Format

Sets you preferred time between 12 hour and 24 hour.

(The default setting is 12 hour.)

9.3.3. Date Format

Sets you preferred date among YY-MM-DD, MM-DD-YY or DD-MM-YY.

(☞ The default setting is MM-DD-YY.)

9.3.4. Month Format

Setup the character of month(Ex: 1, 2, 3…or JAN, FEB, MAR…)

(☞ The default setting is Character.)

9.4. Input/Output

9.4.1. Output Sentence

The JFC-7050 allows customizing the NMEA.0183 sentence.

NMEA

Description

Default

$GPDBT

Depth below transducer

On

$GPDPT

Depth

On

$GPMTW

Water temperature

Off

$GPTLL

Target latitude and longitude

On

$GPVHW

Water speed and heading

Off

$GPGGA

Global positioning system fix data

Off

$GPVTG

Course over ground and ground speed

Off

$GPRMC

Recommended minimum specific GNSS data

Off

9.4.2. Transmit

Available to adjust transmit speed of input/output in each ports.

- 28 -

Operation

* Input sentence

The JFC-7050 accepts NMEA 0183 sentences

NMEA

Description

$GPRMC

Recommended minimum specific GNSS data

$GPGGA

Global positioning system fix data

$GPVTG

Course over ground and ground speed

$GPZDA

Time and date

9.5. Speed Source

Switch the Sensor/NMEA.

- Inside sensor: Use the built-in speed meter for sensor.

- NMEA: Use the external input value for NMEA.

(The default setting is NEMA.)

9.6. Correction

9.6.1. Boat Speed

The tolerance of boat speed value can be corrected. When the [Speed source] is set to the [Sensor],

It is corrected by %. (setting:-50～50%) When the [Speed source] is set to the [NMEA], it is

corrected by numeral. (setting:-10.0～10.0)

(The default setting is 0.)

9.2.5. Water Temp

The error of water temp value can be corrected.

(setting:-10.0～10.0,-10～10°F)

(The default setting is 0.)

9.7. Fishing Mode

Switch the Fresh Water/Sea Water

(The default setting is Sea Water.)

- 29 -

Operation

9.8. Buzzer

It is can be sound on/off.

(☞ The default setting is On.)

9.9. Simulator

It is necessary for an indoor demonstration. The simulations of Fish finder in the memory..

9.10. Customizing

9.10.1. Databar

9.10.1.1. Position

Setting up up/down the position of databar on the display.

(☞ The default setting is Down.)

9.10.1.2. Edit

It customizes the data bar information.

9.10.2. Navigation Data

9.10.2.1. Type

It is a select the navigation data type.

(☞ The default setting is Type1.)

9.10.2.2. Edit

It customizes the Navigation data section except activated the echo sounder section.

9.10.3. Page mode

It is a select the page mode.

- Standard: Choosing Page and customizing is available.

- Flip: Showing the chosen pages in order.

(☞ The default setting is Standard.)

9.10. Language:

Select the language.

9.11. Initialization

9.11.1.Setup Initialization : reset without deleting user data.

9.11.2.Factory Initialization : returning to the initial system from the releasing of factory.

(*All user data will be deleted)

- 30 -

Operation

10. Others

10.1. Key setup

It is available to set up [FUNC] key and [EVENT] key on the JFC-7050.

10.1.1. [FUNC] key:

Set the function frequently used for your convenience.

( The default setting is Page.)

[FUNC]KEY SETUP

1.Page

2.Image Speed

3.Color Rejection

4.Interference Rejection

5.Noise Rejection

6.Shift

7.Bottom Zoom Range

8.White Line

9.Recording

10.Reset

10.1.2. [EVENT] key:

Change the key of the Waypoint input, Setup Nav or capture.

( The default setting is Active.)

- Active: Select the activated section.

- WPT: Input the mark on the current position.

- GOTO: Start navigating toward the mark.

- Capture: Store the current screen.

10.2. WPT

Setting up the WPT List, Edit, and Alarm.

10.2.1. List

Shown the WPT list and it is available to set up or edit the WPT on the list.

10.2.2. Alarm

10.2.2.1. Arrival Alarm

When you approach into the waypoint range, it gives you a notice with alarm.

( The default setting is Off.)

- 31 -

Operation

10.2.2.2. Arrival Range

It is to adjust the range of arrival from your waypoint. If you have a route, it changes to the next

waypoint automatically.

( The default setting is 0.05nm.)

10.2.2.3. XTE Alarm

If you are out of the course, it gives you a notice with alarm.

( The default setting is Off.)

10.2.2.4. XTE Range

It is to adjust the range of the off course.

( The default setting is 0.25nm.)

10.2.3. Navigating Stop

Stops the present navigation.

10.2.4. Save WPT

You can save the WPT in SD card.

10.2.5. Load WPT

You can load the WPT from SD card.

10.3. Recording

This is the function of recording current screen.

Marked [● REC] in red color on the upper right on the data bar during recording.

Note: The recording file is stored in external memory cards, SD memory. Check SD memory in the

JFC-7050.

(* Recording time is different by the size of the memory card)

10.4. Recording List

Available to display and delete the recording file

10.5. Screen Capture

This is the function of Screen Capture.

Note: The recording file is stored in external memory cards, SD memory. Check SD memory in the

JFC-7050.

- 32 -

Operation

10.6. Capture List

Available to display and delete the capture file

10.7. Active

Select the activated section.

10.8. Page

Select the configuration & modification you wish.

- 33 -

Operation

VRM

 Press [VRM]

The VRM (movable marker) shown by the green line can be moved up and down.
It is convenient to measure the depth by aligning with the target such as school of fish.

* Caution: When several seconds pass after finishing the VRM operation, the numerical of marker

depth becomes normal display.

VRM

- 34 -

- 35 -

Installation

Display unit brings expandable display technology to your bridge or navigation station. A careful
installation will assure maximum benefit from Display unit integrated features.

Display Unit Location

Select a location for your Display unit that provides easy viewing from all likely operator’s positions.
The display unit is designed to be mounted on either a console or from an overhead surface. The
Display unit is also designed for flush mounting using six threaded holes on the rear panel. Locate the
display in an area with protection from the elements and avoid direct sunlight on the viewing window.
Also, consider access to the rear panel of the unit for connecting power and cables to the various
remote sensors. The mounting surface must be flat and solid to support the unit and prevent vibration.
There should be access to the inside of the surface to permit through bolt fastening for the mounting
bracket.

Display Unit Installation

Temporarily install the mounting bracket on the display unit and place the unit at the selected location.

CAUTION

The Display unit is unstable when the mounting bracket is not secured. Hold the unit in place
at all times.

Check the suitability of the location and make any adjustments. When all is satisfactory, use the holes
in the mounting bracket as a guide and mark the holes locations on the mounting surface.

- 36 -

Installation

Drill a 1/4 in. diameter hole at each marked location. Mount the Display unit bracket using bolts
through the mounting surface. Place large flat washers on the opposite side of the mounting surface
from the bracket and then install lock washers and nuts. Tighten securely.

Install the display unit into the mounting bracket. Check alignment and operation of the pivots and
security of the mounting. Make any adjustments necessary to prevent binding and assure even
meshing of the pivot locking washers. It is advised to remove the display unit and store it in a safe
place to prevent damage during the rest of the installation process.

Power Connection

Power is supplied to the Echo sounder Unit through a connector on the rear panel of the display unit.
Route the power cable from the Echo sounder Unit location to the ship’s power distribution panel.
Connect the black wire to a battery negative (-) terminal of the power panel.
Connect the white wire to a fused battery positive (+) terminal of the power panel ( 12 to 24 Vdc
nominal). If a fused terminal is not available, install an in-line fuse holder.

Sensor Connection

There are many sensors and transducers available which may be used to expand the capabilities of
the Echo sounder Unit. Connectors for these accessories are provided on the rear panel of the Echo
sounder Unit. For most sensors, only data and control connections are routed to the Echo sounder
Unit.

- 37 -

Installation

An input designation means, in put to Echo sounder unit and an output designation means, output
from JFC-7050. Sensors will have similar designations, but from the sensors point of view. Therefore,
a sensor output will connect to an JFC-7050 input and a sensor input will connect to an Echo sounder
unit output.

Transducer Installation

If you have chosen a Sonar option for your Echo sounder a transducer must be installed on your
vessel unless an exiting compatible transducer is installed. The installation of sonar transducers
require some planning and skill to achieve the best result. It is strongly advised hat you read the
installation instructions completely before starting. The two basic types of transducers are transom
mount and through-hull mount. There are variations within each type to provide for options such as
temperature sensors, speed sensors and for different beam angels and sonar frequencies. Several
different transducers may be used with the JFC-7050. Refer to the optional Equipment list for the
variations available.

CAUTION

Mounting a sonar transducer for your JFC-7050 Sonar requires drilling holes into the hull of your boat
which could affect its water integrity. Therefore, installation should be attempted only by qualified
individuals. If you have any doubt about your ability to complete the process successfully, we
recommend you obtain the services of a JRC dealer or marine service center with knowledge and
experience in transducer installation.
Since your JFC-7050 Sonar performance depends upon how well the transducer is installed, please
carefully observe the following mounting procedures.
For proper performance, the transducer’s mounting location must be chosen carefully. The transducer
must be mounted in a location that is free from turbulence and air bubbles created by movement of the
boat through water. Air bubbles greatly reduce the efficiency of the transducer. It is also strongly

- 38 -

Installation

recommended, for transom mounted transducers, the transducer be mounted in an area with the least
amount of disturbed water passing under the transom. To determine the best mounting location,
operate the boat at several different speeds and observe the water as it passes under the transom.
Turbulence caused by the trim tabs, motor mounting, the keel, and lifting strakes.

Transom Mounting

Transducers designed for transom mounting give good performance when installed on most boat
types, however, the transom transducer style should not be used on boats with inboard engines.
For boats with poor water flow under the transom or on in-boards, consider selecting a through-hull
transducer. JRC offers many styles of transducers.
Determine the transducer mounting place by referring to the steps mentioned above. For best result,
the transducer face should be level. Also, the transducer face should be mounted from flush to 1/4
inch below the under surface of the hull. The trailing edge of the housing should be about 1/8 inch
below the leading edge. The adjustable stainless steel bracket is designed to allow fine tuning of the
transducer position once the installation is completed.
Route the transducer cable as far as possible away from the boat’s power cables, engine controls and
other electrical cables. Do not route transducer cables near your VHF radio power or antenna cables.
Assemble the transducer using the brackets and hardware supplied. Actual fastening to the hull of
your boat depends upon the hull construction and hull material. If additional items must be used, be
sure to obtain marine stainless steel hardware. Also, be sure to use marine waterproof sealant on all
through hull fastenings. Do not use silicone RTV, since it does not have long life underwater.

Transom Transducer Maintenance

If your boat is kept in the water, sea growth can quickly accumulate on the face of the transducer. In
just two weeks in some locations, your Sonar performance could be affected. It is recommended that
at least the face of the transducer be coated with special transducer antifouling paint. Alternatively, the
entire transducer can be painted and is easier to keep clean. Do not use regular antifouling paint.

- 39 -

Installation

All copper base antifouling paints are unsatisfactory and will prevent normal operation. If fouling does
occur, use a stiff brush or putty knife to remove growth. Be careful not to gouge the face of the
Transducer. Occasional wet sanding of the transducer face is permissible with #220 grit or finer wet or
dry paper.
Do not use solvents to clean your transducer. The high impact polycarbonate housing is very durable
but solvents will destroy it. Keep acetone, MEK, lacquer thinner and most other thinner/solvents away
from your transducer.

Through-hull Transducers

Through-hull transducers are recommended for in-boards and other vessels with disturbed water flow
under the transom. JRC offers several models of bronze through-hull transducers. To enjoy the full
capability of your Sonar, select a dual frequency model with temperature sensor. Sturdy bronze
construction assures a secure installation and provides a strong base for fairing blocks, if needed, to
compensate for hull shape.
The transducer should be installed in a location free of bubbles and away from disturbed water flow.
Smooth water flow around the transducer and along its surface is very important for consistent
operation.
Areas in the center third of water line length at cruising speed are usually satisfactory.
Locations forward of the engine and in a flat area near the center line of the boat are preferred. Do not
install the transducer behind water intakes, other through-hull fittings or irregularities in the hull.

- 40 -

Installation

Dead-rise

On hulls with dead-rise of 5 or less, the transducer may be mounted directly through the hull. Where
dead-rise is greater than 5, fairing blocks must be used to orient the face of the transducer parallel
with the water surface.
In this case, no fairing block is necessary. To prevent leakage, any gaps between the stem threads
and holes drilled in the hull should be completely filled with waterproof marine sealant. Tighten the
stem nuts securely but do not over tighten. In this situation, install fairing blocks both inside and
outside the hull. Install the transducer with the face aiming straight down. To prevent leakage, any
gaps between the stem threads and holes drilled in the hull should be completely filled with waterproof
marine

sealant. Tighten the stem nuts securely but do not over tighten.

Water Line Drifting

Water Line Cruising

Best Location

Stem

Marine Sealant
Hull

Fixing Nut

- 41 -

Installation

Through-hull Transducer Maintenance

If your boat is kept in the water, performance of your JFC-7050 Sonar will be adversely affected by
accumulations of sea growth on the face of the transducer. To prevent sea growth effects, the face of
the transducer may be coated with antifouling paint specially formulated for transducers. Do not use
regular antifouling paint on the face of the transducer. The bronze housing may be coated with any
antifouling paint. If fairing blocks are used, especially if made of wood, complete sealing prior to
painting is important.

Marine Sealant
Stem

Fixing

Outer Fairing Block
Hull

Inner Fairing Block

- 42 -

- 43 -

Power Cable

DWG. NO.

---

DESCRIPTION

f7050-PO10301

DATE

2012.05.07

1/2

SCALE

MATERIAL

MODEL

JFC-7050

1

8

6

7

5

342

Power Calbe

WIRE COLORPIN # FUNCTION

12 ~36

213

4

7

6

5

8

1

8

7

3

4

5

2

6

- 44 -

J7050-PL00DP_die

JFC - 7050

DESCRIPTION

DWG. NO.

NS

SCALE

MODEL

MATERIAL

---

DATE

2012.10.19

PLAN & DIMENSIONS

6

2

5 4

3

7

8

1

1

8

7

3

4

5

26

- 45 -

Declaration of Warranty

Declares of under his sole responsibility that the produced Echo Sounder

manufactured Japan Radio Company.

Japan Radio Co., Ltd.

18-7, Osaki 1-chome, Shinagawa-ku

Tokyo 141-0032 Japan

Email:

[e-mail]

Fax: [phone]

Guarantee for One Year

Above agent or dealer warrants the produced Echo Sounder, JFC-7050 for One (1) year for guarantee
as bellows.

1.Main Unit : One (1) year guarantee after a user purchases the product within one
(1) year

2. LCD and Accessories : One (1) year for consumed accessories (including LCD)
after a user purchases them.

Service in Charge

1. Over the term from the guarantee

2. Damage from user’s carelessness (inundation, impact)

3. Intentional dismantle, modification or remodeling of the unit.

4. Unauthorized parts, components or accessories are used in the unit.

5. Installed or maintained by unauthorized person

6. Consumed parts and components (batteries, LCD, etc) run out.

7. Faults or damages from other reasons.

Model

Serial No.

Date of Purchase

Customer Name

Price

Caution – Keep this warranty card with the receipt for fast and good service

18-7, Osaki 1-chome, Shinagawa-kuTokyo 141-0032 Japan
Email: [e-mail]
Fax: [phone]

CODE No.72ZPNA2231