JRC FF50 User manual

COLOR LCD FISH FINDER
FF50
SERVICE MANUAL
Document No. 7ZPBS4104

1
General Information
This service manual describes the maintenance and inspection procedures for the
FF50. Prior to the installation, users are requested to read this manual well and
familiarize with its contents so that an optimum function may be derived from the
FF50.
Note that the grounding work is indispensable to prevent electric shock hazards
as well as to ensure the intended function of the set. Don’t try to ignore the
grounding work.
For the operation of the set, refer to the Instruction Manual.

2
Before You Begin
Symbols Used In This Manual
Related Symbols Marks
In this manual, and on the equipment, we use several warning signs to call your attention to
important to items that, if not handled correctly, could present danger to yourself or property.
These warning note classifications are as described below.
Please be fully aware of the importance of these items before using this manual.
Examples of Related Symbol Marks Used in this Manual and on the Unit
Warning Label
You can see the warning label on the top of the unit.
Do you attempt to remove the warning label from the unit or impair or modify it.
Each marks is intended to alert the user to the presence of
prohibited activity. The picture/word in/beside each mark alerts
you to operations that are prohibited.
WARNING
CAUTION
Hot Surface
Prohibition
Each △mark is intended to alert the user to the presence of
precautions including danger and warning items. The picture in
each △mark alerts you to operations that should be carefully
performed.
Prohibitions
disassembly
Instruction
Each ●mark is intended to alert the user to the presence of
necessary instructions. The picture in each ●mark alerts you
to operations that must be performed.
Indicates warning items that, if ignored, may
result in serious personal injury or even death.
Indicated cautionary items that, if ignored, may
result in personal injury or physical damage.

3
Usage Hints
When installing this set, be sure to connect
the grounding wire to the grounding
terminal of the set. Otherwise, an electric
shock can result when a failure or leakage
occurred on the set.
Do not damage, break or modify the power
cord.
Placing a heavy load, heating, pulling or
forcibly bending the cord can damage it
resulting in a fire or an electric shock.
Do not use this set at a voltage other than
the supply voltage stated on the set.
Otherwise, a fire, an electric shock or
system failure can result.
Do not touch inside the set with wet hands.
When your hands are wet, don’t try to
connect or disconnect the power cord or
touch the switches. Otherwise, an electric
shock can result.
WARNING

4
When cleaning the surface, do not use any
organic solvent such as thinner or benzene.
Otherwise, the painting on the surface may
be damaged.
For cleaning the surface, remove the dust,
then wipe with clean dry cloth.
Do not bring the set in a cooled state
suddenly into a warm room.
A high voltage may leak due to dew
condensation resulting in a failure. In this
case, use the set after leaving it alone for 30
minutes.
When removing the power cord, be sure to
remove the power cord terminal correctly.
Pulling the power cord can damage it
resulting in a fire or an electric shock.
CAUTION
No
Thinne
r
benzene

5
Index
General Information･･･････････････････････････････････････････････････････1
Before You Begin･････････････････････････････････････････････････････････2
Usage Hints･･････････････････････････････････････････････････････････････3
Index････････････････････････････････････････････････････････････････････5
1. Specifications････････････････････････････････････････････････････････････6
2. Component ･･････････････････････････････････････････････････････････････8
3. Outline Drawing ･･････････････････････････････････････････････････････････9
4. Installing the display unit ･････････････････････････････････････････････････10
5. Circuit Block Diagram ････････････････････････････････････････････････････11
6. Parts Layout ････････････････････････････････････････････････････････････13
7. Mechanical Parts List ････････････････････････････････････････････････････16
8. Master Reset and Language Select ････････････････････････････････････････18
9. NMEA0183 INPUT/OUTPUT SENTENCES ･････････････････････････････････21
10. SELF TEST･････････････････････････････････････････････････････････････22

6
1. Specifications
Display 6.5 inch Color LCD (TFT)
Resolution 234×320 dots (Screen Size 133 mm×97 mm)
Presentation 8 or 16 Color Gradation with 2 Patterns
Brightness Control 10 steps
Contrast Control 10 steps
Range Auto or Manual
5 to 1,500 m
10 to 5,000 ft
3 to 1,000 fm
Shift Auto or Manual
0 to 1,000m
0 to 3,000ft
0 to 600fm
Frequency 200 kHz/50 kHz (Dual Frequency)
Power Output 600 W RMS (4,800W P-P)
Gain (Sensitivity) 100 steps
Depth Unit Meter, Feet, Fathom, SP (0.3000 to 1.9999 m)
Speed Unit Knots, Mile/h, Km/h
Noise Suppression Selectable (0 to 15 level)
Interference Rejection Selectable (OFF, IR1, IR2)
STC Selectable (Short, Mid, Long)
Water Temperature 32.0 degree Fahrenheit to 100.0 degree Fahrenheit
(0.0 degree Centigrade to 40.0 degree Centigrade)
Boat Speed 0 to 70 Knots
Trip Log (Only at the STD/ 0 to 999 NM Navigation type 1 or 2)
Display Modes 1) STD (LF or HF)
2) STD (LF)/STD (HF)
3) STD/A-Scope (LF or HF)
4) STD/A-Scope (LF)/STD/A-Scope (HF)
5) STD/Zoom (LF or HF)
6) STD/Auto Zoom (LF or HF)
7) STD/Bottom Lock (LF or HF)
8) STD/Bottom Discrimination (LF or HF)
9) STD/Dual Frequency Mixed
10) STD/Navigation type1 (LF or HF)
11) STD/Navigation type2 (LF or HF)
Simulator Built-In

7
Audible-visual alarms Fish, Shallow, Deep, Temp Upper, Temp Lower,
Temp Rate, Arrival, Anchor, Off Course, DGPS
Waypoints Max. 400 points.
Route plans 10 plans, 40 waypoints per route.
Memory Backup Includes Battery
Option NAVAID Input GPS100/DGPS200 sensor NMEA0183 format
Input Voltage 12 to 24 VDC
Power Consumption Approx. 25 W
Mass (Display Unit) 8.8 lbs (4 kg)
Water Resistance IPx5
Environmental Conditions -10 ℃ to +50 ℃

8
2. Component
When unpacking your FF50, you should find the following standard equipment
in the carton. If any items are missing, please notify your JRC dealer immediately.
Standard Equipment
No Description Model No. Qty. Remarks
1Fish Finder JFC-500 1
2 Transducer Depends on the 1 See below
Type the item
3 Spares 5ZFAD00362 1 Fuse (3.15A)
4 Power Cable CFQ-6382 1 length 1.5m
5 Ferrite Core 5MBBB00002 1 NF-130
6 Sun Cover MTV302704 1
7 Console Mounting Kit MPTG30716 1
8Instruction Manual 7ZPBS2106B 1
9 Warranty Card 1
Transducers
Model No. Frequency Remarks
CFT-2501TFA200 kHz/50 kHz Transom type dual frequency with
speed and temp. sensor
CFT-2501HFA 200 kHz/50 kHz Through hull type dual frequency
with speed and temp. sensor

9
3. Outline Drawing
Unit :inch(mm)

10
4. Installing the display unit
Connecting The Power Supply and Transducer cables
(1) Connecting the Power Cables
1, Use CFQ-6382 for the power cable.
2, Connect the Power cables as indicated below.
Cable Connector pin NO. Polarity
Black 1-
Red 2+
3. At powering on,2.5A current is conduced to the FF50 for one second.
Current capacity of circuit breaker, if any , must be suitable for the current.
(2) Power Cable Connecting Procedure For AC specification
1. Connect DC power supply ,then connect the power cable to DC power supply.
2. Don’t use the DC power supply of switching form power supply.
If you use the switching power supply , RX signal is interfered by power supply.
(3) Power Cable and transducer Wiring Procedure
1. Don’t try to bundle the radio equipment coaxial cable and the audio speaker
cable with the Fish finder power cable.
Such practice can generate noise on the radio and audio equipment.

11
5. Circuit Block Diagram
These VR is adjusted in manufacture.
Don’t Remove VR adjustment.
RV600 LCD Flicker Adjustment
RV140, RV141 RX GAIN Adjustment
IC300
32bit
RISC CPU
IC306
LCD Control
T700,701
TR702,703
Inverter
LCD
Interface
TFT LCD
7WSBS7001
J302
J702
DATA
Backlight
PANEL
CCK-829
DPU
CML-595
J303
IC304
Backup RAM
IC301,302
ROM
7DEBS7042
7DEBS7043
IC312
Panel
Interface
BT301
Battery
W401:BLUE
W400 :WHITE
J301
J300
TRX
CMN-526
T202
TX TRANS
PHT480,481
NMEA RX
TR430
PS FET
2SK1620
T430
PS TRANS
7ZCBS7017
TR203,204
TX FET
2SK1316
IC180 RX IC
FL140
RX Receiver
RV600
FL141
RV140 RV141
IC410
PS Control
CD431
TX Rectifier
IC480
NMEA TX
J402 Power Cable
J403 GPS
J404 NMEA I/O
J402 TRANSDUCER
Regulated Voltage

12

13
6. Parts Layout
DPU_UNIT CML-595
Parts side
Solder side
RV600 LCD Flicker Adjustment
J303 FOR PANEL
BT301 Backup
Battery
INVERTOR
HighVoltage
J702 FOR LCD
Backlight
J301&302
FOR CMN-526

14
PS/TRX_UNIT CMN-526
Parts side
Solder side
RV140&141
RX Gain
Adjustment
Don’t Remove
W400&401 For CML-595

15
PANEL_UNIT
Parts side

16
7. Mechanical Parts List
Parts List Page 1/1
(Model Number) (Title)
FF50(JFC‑500)
COLOR LCD FISH FINDER
Item PART NAME
Qty
PART NUMBER DESCRIPTION
1Front Panel Assy 1MPBC34289
2Gasket 1MTV302538
3Contact Rubber 1MTV302660
4Light Guide 1MTV302664
5Seald Case 1MTB347026
6φ28 Knob 1MPHD30171
7 Cap 1 MPPK30372
8LCD Unit 1‑ H‑7WSBS7001
9DPU Unit 1‑ CML‑595
10 Plate 1 MTB344485
11 Radiation Case 1MTB349940
12 Rubbber Packing 1MTT305900
13 Radiation Seet 1MTT306641
14 Bush 1 BRNG00206
15 Main Unit 1‑ CMN‑526
16 Panel Unit 1‑ CCK‑829
17 Radiation Seet 1MTT306524
18 Label 1 MPNN37019
19 Label(Warning) 1MPNN35234A High voltage
20 Label(Warning) 1MPNN35688 Hot surface
21 Rear Cabinet Assy MPBX36626
‑1 Rear Cover 1MTC300800
‑2 Sponge Rubber 2MTV302756
‑3 Rubber Spaser 2MTT305975
‑4 Seet 1 BRPK05061
22 Bracket 1MTB344486
23 Knob 2 MPTG30053
24 Sun Cover 1MTV302704
25 Tapping Screw 8BRTG04818 φ3x16 SUS Ptype
26 Tapping Screw 13 BRTG03437 φ3x12 Fe ZMC Ptype
27 Tapping Screw 4BRTG04241 φ2.6x6 Fe Ptype
28 Tapping Screw 7BRTG03095 φ3x8 Fe ZMC Btype
29 Screw 8 BSNA03006S M3x6 Fe ZMC
30 Screw 1 BSBB04010B BB4x10 Bs
31 Screw 1 MPTG30149 For Setting
32 Rubber Washer 8MTT301458A
33 Washer 11 BSLW03000B LW3Bs
34 Washer 2BSFW04000B W4Bs
35 Washer 1BSSW04000S SW4
36 Mount Kit 1MPTG30716
37
38
39
40

17

18
8. Master Reset and Language Select
A MASTER Reset can be performed by either the SOFT
Reset or HARD Reset.
The SOFT Reset restores all set values except the
WAYPOINT data and ROUTE PLAN data to the original
factory set-up values.
The HARD Reset restores all set values to the original
factory- set values and deletes the WAYPOINT and ROUTE
PLAN data.
When you want to keep the WAYPOINT and ROUTE PLAN
data, execute the SOFT reset. When the MASTER reset is
executed, the CUSTOM DEFAULT is initialized to the
factory-set default settings.
When you push to BRT/PWR turn the power on while
pushing CUSTOM and MENU at the same time, the
LANGUAGE SELECT display appears.
Press the JOYSTICK up or down to select a language
and push it in to open the MASTER RESET type select
display.
Press the JOYSTICK up or down to select HARD or SOFT
and push it in to select OK or CANCEL for the selected
language and the reset type.
Press the JOYSTICK to the left or right to select OK and
push it in to execute the MASTER reset.
Select CANCEL and push the in to return to the language
select display.
After the MASTER reset is executed, the FF50 is rebooted
automatically.
To abort the MASTER reset, turn the power off and then
turn the power on again.
Note:
When a backup error occurs, the FF50 enters the MASTER
Reset
mode automatically, and the language select menu opens.
In this case ,you cannot abort the MASTER reset. Be sure
not to turn the power off during the MASTER reset.