Furuno 1932 MK2 User manual

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The paper used in this manual
is elemental chlorine free.
FURUNO Authorized Distributor/DealerFURUNO Authorized Distributor/Dealer
9-52 Ashihara-cho,9-52 Ashihara-cho,
Nishinomi
y
a 662-8580, JAPANNishinomi
y
a 662-8580, JAPAN
Tele
p
hone :Tele
p
hone : 0798-65-21110798-65-2111
Fa
x
Fa
x
0798-65-42000798-65-4200
::
FIRST EDITION :FIRST EDITION : JUN.JUN. 19991999
Printed in JapanPrinted in Japan
A
ll ri
g
hts reserved.
A
ll ri
g
hts reserved.
A2A2 :: NOV.NOV. 07, 200507, 2005
Pub. No.Pub. No. SME-34620-A2SME-34620-A2
*00081001800**00081001800*
*00081001800**00081001800*
(( YAKIYAKI )) MODEL1932/1942 MARK-2MODEL1932/1942 MARK-2 * 0 0 0 8 1 0 0 1 8 0 0 ** 0 0 0 8 1 0 0 1 8 0 0 *
*SME34620A20**SME34620A20*
*SME34620A20**SME34620A20*
* S M E 3 4 6 2 0 A 2 0 ** S M E 3 4 6 2 0 A 2 0 *

CONTENTS
Chapter 1. General
1.1 Outline ........................................................................1-1
1.2 Boards & Major Components......................................1-2
1.3 Specifications..............................................................1-3
Chapter 2. Block Description
2.1 Overview.....................................................................2-1
2.2 Display Units...............................................................2-2
2.3 Transceiver Unit..........................................................2-13
2.4 Different Points of Similar PCBs.................................2-15
Chapter 3. Adjustment
3.1 Adjustment of Display Unit.........................................3-2
3.2 Adjustment of Scanner Unit.........................................3-10
Chapter 4. MAINTENACE
4.1 Remarks on Replacement of Major Parts.....................4-1
4.2 Life Expectancy of Expendable Parts...........................4-2
4.3 Menu...........................................................................4-3
Chapter 5. Troubleshooting
5.1 Outline ........................................................................5-1
5.2 Message Indications ....................................................5-1
5.3 Troubleshooting Flow Charts.......................................5-2
Exploded View...............................................................D-1
Mechanical Parts List.................................................M-1
Schematic Diagram.....................................................S-1
Electrical Parts List.....................................................E-1

Chapter 1. General
1-1
1.1 Outline
This manual provides the information necessary for the servicing and adjustment of the radar’s
MODELs 1932MK2 and 1942MK2.
The antenna unit uses a Log IF amplifier.
The table below shows the major specifications of the each model. The same program is installed
on all models, but the menu setting through factory menu is different between the models.
Functions MODEL 1932MK2 MODEL 1942MK2
Maximum range 48 NM 64 NM
Program Number 03591301XX
Tuning Voltage
(displayed at manual tuning) 1 V to 12 V *
Antenna Rotation about 24 or 48 rpm
Output power 4 kW 6 kW
The major parts and P.C. Boards used in the display and scanner units are tabulated on the next
page.
*: 1 to 12 V; M1832, M1932 MK2 and M1942 MK2, 5 to 32 V; M1932, and M1942

1.2 Board & Major Components
1-2
1.2 Boards & Major Components
Board MODEL 1932MK2 MODEL 1942MK2
PROCESSOR Board SPU-9211
POWER SUPPLY Board PTU-9205
FILTER Board FIL-9206
PANEL Board PNL-9212
INTERFACE Board INT-9213
Auto Plotter
(Option: ARP-10) 18P9007
DISPLAY UNIT
(See note.)
CRT Unit QB1069
MODULATOR Board 03P9235A 03P9235
IF AMP Board IF-9214
I/F Board 03P9249
MIC RU-9390
Magnetron E3571 MG5389
Circulator RC4365
SCANNER UNIT
Scanner Motor RM-8025 (24 rpm), RM-8711 (48 rpm)
Note)
The display unit is the same as that of MODEL 1832, 1932 and 1942 in hardware. The software
change is made in the factory menu. See Chapter 2.

1.3 Specifications
1-3
1.3 Specifications
SCANNER UNIT
MODEL 1932MK2 MODEL 1942MK2
Radiator Type Slotted Waveguide Array
Radiator Length 100 cm 120 cm
Horizontal Beamwidth 2.4!1.9!
Vertical Beamwidth 27!22!
Within "20!
of mainlobe –24 dB or less
Sidelobe
Attenuation Outside "20!
of mainlobe –30 dB or less
Polarization Horizontal
Antenna Rotation 24 or 48 rpm nominal
Scanner Housing Stureruct Open Radiator
Standard 1.1 m 1.0 m
Compass
Safe Distance Steering 0.8 m 0.74 m
TRANSCEIVER
MODEL 1932MK2 MODEL 1942MK2
Magnetron E3571 MG5389
Frequency & Modulation 9410 MHz "30 MHz, P0N
Peak Output Power 4 kW nominal 6 kW nominal
0.08 µs, approx 2100 Hz
(Short Ranges: 0.125 nm to 1.5 mm)
0.3 µs, approx 1200 Hz (Middle Ranges: 1.5 nm and 2 nm)
Pulse Length &
Pulse Repetition Rate 0.8 µs, approx 600 Hz (Long Ranges: 3 nm and above)
Modulator FET Switch
Duplexer Circulator with diode limiter
Receiver Front End MIC (Microwave IC)
Tuning Automatic or Manual
Intermediate Frequency 60 MHz
Bandwidth 25 MHz (0.08 µs, 0.3 µs), 3 MHz (0.8 µs)

1.3 Specifications
1-4
DISPLAY UNIT
MODEL 1932MK2 MODEL 1942MK2
Picture Tube PPI (Raster scan, Daylight display)
MODEL 1932MK2: 48 nm
MODEL 1942MK2: 64 nm
Range Scale (nm)
0.125 0.25 0.5 0.75 1 1.5 2 3 4 6 8 12 16 24 36 48 64
Range Ringe Interval 1/16 0.125 0.125 0.25 0.25 0.5 0.5 1 1 2 2 3 4 6 12 12 16
Number of Rings 22434343434444344
Bearing Resolution 2.4!1.9!
Range Discrimination Better than 20 m
Bearing Accuracy "1!
Minimum Range Better than 25 m
Range Ring Accuracy
VRM Accuracy 0.9!or 8 m, whichever is the greater
Input/Output Terminal
NMEA (two input) : NMEA 0183
NMEA (output) : NMEA 0183 ($RATLL, $RARSD, $RATTM: ARP-10
(option) )
GYRO (output) : FURUNO clock-serial (AD format) or NMEA 0183
(HDT, VHW, HDG, HDM)
External Buzzer (output): +12 V source pulse Open Collector
Slave Display (output): TRU-HD, BP, TRU-TRIG, VIDEO
Nav Data
NMEA 0183 Format (••: any talker)
$••APB, $••BWC, $•• BWR, $••DPT, $••DBT, $••GGA, $••GLL,
$••GLC, $••GTD, $••HDG, $••HDM, $••HDT, $••MDA, $••MTW,
$••RMA, $••RMB, $••RMC, $••VTG, $••VHW, $••XTE,
Standard 0.75 m
Compass
safe
Distance Steering 0.6 m

1.3 Specifications
1-5
ENVIRONMENTAL CONDITIONS
ITEM SPECIFICATIONS
Scanner Uint –25 #to +70 #
Ambient
Temperature Display Unit –15 #to +55 #
Humidity Relative humidity 93 % "2 % or less at +40 #"3 #
Vibration IEC 945
POWER SUPPLY & POWER CONSUMPTION
POWER SUPPLY SPECIFICATIONS
DC Ship’s Mains 10.8 V to 41.6 V
MODEL 1932MK2 : 40 W approx
MODEL 1942MK2 : 48 W approx
AC Ship’s Mains 100/110/220/230 VAC, 50/60 Hz, 1$
Rectifier RU-3423 required

Chapter 2. Block Description
2-1
2.1 Overview
The simplified block diagram of the system is illustrated below.
Mag. MIC
Mod. IF
Amp
RF Module
Antenna
Scanner Unit
Processor
Panel Power
CRT
Ship’s mains Nav.
Gyro
Display Unit
HD,BP
Video
Trigger
M1832-SME-8
Figure 2.1 Simplified block diagram of system
TX
The trigger pulse from the PROCESSOR Board is delivered to the MODULATOR Board, fires the
magnetron, and then radar wave is emitted from the radiator.
RX
The 9.4 GHz echo signal received by the antenna is converted to 60 MHz signal by the MIC,
amplified by IF Amp, and fed to thePROCESSOR Board as a video signal. It is digitally processed
and then displayed on the CRT.

2.2 Display Unit
2-2
2.2 Display Unit
Refer to the block diagram on page 2-3.
2.2.1. Power Supply Circuit (PTU-9205)
The constant voltage generator Q1 is in operation even when power switch is off, if ship's mains is
supplied. The power supply circuit is basically consists of a main inverter and a sub inverter. The
main inverter derives the isolated line voltages +12 V/ANT+12 V and -12 V/ANT -12 V from the
main input. The sub inverter derives +5 V and +32 V from +12 V output of the main inverter.
Main inverter
The PWR switch becomes "open" when it is set to on position.
When the PWR switch is pressed, about 9 V is input via PWR line (J1 #13), Q2 is on, and DC+10
V is applied to the PWM.
When power is supplied to the PWM controller, it starts operation and alternately turns on and off
two switching FETs Q3/Q4 connected to the primary widing of T1. The resultant AC voltage
obtained on the secondary windings are rectified and smoothed to +12 V and -12 V, and delivered
to various circuits in the equipment. The voltage taken from the +12 V line is fed back to the PWM
controller through the VR1 to maintain the +12 V output constant.
Sub inverter
U5 and the associated circuit form a PWM switching regulator for +5 V and +32 V. The voltage
taken from +5 V line is fed back to U5 through R37 resistance to maintain the +5 V output
constant.
Protectors
Protection of power supply circuit is achieved by stopping the drive signals to the switching FETs
Q3/4.
Overload on +5 V and + 32 V line is detected by U6. Overload on +12 V (MOTOR + ) line is
detected by U7. When the +5 V and + 32 V line is reduced by a heavy load, U6 or U7 becomes
conductive and consequently disablesthe PWM controller through Q6, Q7 and Q8. Overcorrecton
the main input line is detected by R13, R14 and R15. The voltage drop across Q6, Q7 and Q8
becomes large when the inverter is overload. Overcorrect detector U3 disables PWM inverter U2
when the voltage drop exceeds a certain level.
Overvoltage of mains input is detected by the U1. When the input voltage exceeds 41.6 V, the U1
becomes active and disables PWM controller U2.
Scanner motor power (ANT+12 V/-12 V)
+12 V and -12 V (ANT +12 V/ANT -12 V) are used to drive 24 V scanner motor.
The power to the motor is turned on/off by the relay (K1) on the POWER SUPPLY Board. The
relay control signal from the SPU Board is supplied to Q52 and Q53 on the POWER SUPPLY
Board. Pressing the TX key changes the ANT SW signal state from 5 V to 0 V, and K1 is on to
supply + 12 V.