Furuno 1932 MK2 Service Manual
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Furuno 1932 MK2 Service Manual

Marine radar/auto plotter
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  • Page 1 Back...
  • Page 2 The paper used in this manual is elemental chlorine free. FURUNO Authorized Distributor/Dealer FURUNO Authorized Distributor/Dealer 9-52 Ashihara-cho, 9-52 Ashihara-cho, Nishinomiya 662-8580, JAPAN Nishinomiya 662-8580, JAPAN Telephone : Telephone : 0798-65-2111 0798-65-2111 0798-65-4200 0798-65-4200 FIRST EDITION : FIRST EDITION : JUN.

  • Page 3: Table Of Contents

    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.

  • Page 4: Chapter 1. General

    Chapter 1. General 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.

  • Page 5: Boards & Major Components

    1.2 Board & Major Components Boards & Major Components Board MODEL 1932MK2 MODEL 1942MK2 PROCESSOR Board SPU-9211 POWER SUPPLY Board PTU-9205 FILTER Board FIL-9206 DISPLAY UNIT PANEL Board PNL-9212 (See note.) INTERFACE Board INT-9213 Auto Plotter 18P9007 (Option: ARP-10) CRT Unit QB1069 MODULATOR Board 03P9235A...

  • Page 6: Specifications

    1.3 Specifications 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 Within "20! –24 dB or less of mainlobe Sidelobe Attenuation Outside "20! –30 dB or less of mainlobe Polarization Horizontal...
  • Page 7 : NMEA 0183 ($RATLL, $RARSD, $RATTM: ARP-10 (option) ) Input/Output Terminal 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 NMEA 0183 Format (••: any talker)
  • Page 8 1.3 Specifications ENVIRONMENTAL CONDITIONS ITEM SPECIFICATIONS –25 # to +70 # Scanner Uint Ambient Temperature –15 # to +55 # Display Unit Relative humidity 93 % "2 % or less at +40 # "3 # Humidity Vibration IEC 945 POWER SUPPLY & POWER CONSUMPTION POWER SUPPLY SPECIFICATIONS 10.8 V to 41.6 V...

  • Page 9: Chapter 2. Block Description

    Chapter 2. Block Description Overview The simplified block diagram of the system is illustrated below. Scanner Unit Antenna Display Unit Mag. HD,BP Mod. Processor Video Trigger RF Module Panel Power M1832-SME-8 Ship’s mains Nav. Gyro Figure 2.1 Simplified block diagram of system 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.
  • Page 10 2.2 Display Unit 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.
  • Page 11 2.2 Display Unit Figure 2.2 BLOCK DIAGRAM OF POWER SUPPLY...
  • Page 12 approx approx 3 Vpp 3 Vpp J104 J104 A/C AUTO: OFF A/C AUTO: ON TX TRIG 13 s EXT TRIG TRIG EXT TRIG To RF unit Selecter TP3 (VIDEO LEVEL) ANALOG ECHO STRETCH EEPOT A/C AUTO GAIN, A/C RAIN ES 2 Max Brilliance: 4 Vpp VIDEO A/C SEA...

  • Page 13: 2.2 Display Units

    2.2 Display Units AUTOMATIC TUNING There are two types of automatic tuning; peak search and short search. Peak search: Tuning voltage (TUNING), point A in the figure below, is searched in the tuning voltage range 0 V to 12 V. Tuning indicator voltage (TUN-ING IND) is maximum at point A.
  • Page 14 2.2 Display Units TUNING INDICATOR After tuning adjustment, peak TUNING IND voltages, ", # and $ in the figure on page 2-5 are stored on to E2PROM. The automatic and manual tuning point A is also memorized. Using these data, the tuning indicator extends more than 80 % on ALL TX pulses.
  • Page 15 2.2 Display Units Video Adjustment The video adjustment is carried out through the Tune/video adjustment menu in the installation setup menu. The following describes the outline of the adjustment. "% Main Bang suppression Level (MBS L) is set to 0. #% EEPOT, U14 is set to minimum.
  • Page 16 2.2 Display Units Turning on/off antenna rotation The SPU board controls antenna rotation. In normal operation, the antenna rotates during the TX condition. However, the antenna can be stopped during the TX condition thru the Installation setup menu. PTU-9205 Board SPU Board INT9213 Board J201...
  • Page 17 2.2 Display Units Block Diagram of ARP PCB 1) ARP-10 dose not require QV echo adjustment at installation, unlike other existing ARPs. No checkpoint for QV echo is provided. The ARP display can be turned on/off thru the ARP menu. The ARP data appears even when ship's speed and gyro data are not supplied 2) The ARP board is checked whether it is installed or not at every power-on, using the communication line between SPU and ARP boards.
  • Page 18 2.2 Display Units Target acquisition by Auto plotter Conditions for manual acquisition 1) Within 9 scans, the target must be detected near the cursor position. 2) Target echo must be smaller than land echo (800 m or less in the radial or circumferential direction) at the front-end processor.
  • Page 19 2.2 Display Units ARP self-test [Self test] Key test: Press each key and check on-screen indication lights ARP-10 TEST 1859027101xx SPEED NAV 0.0KT COURSE 287.6ß TRIGGER VIDEO MIN-HIT 0003 SCAN-TIME 0250 MAN-ACQ AUTO-ACQ FE-DATA1 0217 FE-DATA2 0023 Program No : 0359139-1xx : OK : OK Hours in use...
  • Page 20 2.2 Display Units TTM data Sentence format (J1352) Hardware: Current loop Software: NMEA 0183 (Ver 2.0) TTM: Tracked target message $RATTM, xx, x. x, x. x, a, x. x, x. x, a, x. x, x. x, a, c--c, a, a, a <CR><LF> M1832-SME-09E 1.
  • Page 21 2.3 Transceiver Circuit Transceiver Circuit MODULATOR Board, 03P9235 The modulator generates narrow high-tension pulses to drive the magnetron. The trigger generator, consisting of U805 and associated components, generates the pulse that fire modulator FETs Q805 and Q806 when it receives the TX trigger signal from the processor unit. The output from the FET modulator, Q805 and Q806 is boosted up to 4.5 kV by the transformer T802.
  • Page 22 J803 CR802 CR802 R808 R809 MODULATOR Board T801 TX-HV 03P9235A(Model 1932MK2) B801 TP804 R861 J827 24rpm:RM-8025 03P9235(Model 1942MK2) 48rpm:RM-8711 MOTOR(+) CR803 MOTOR(-) Q801 TP802 +12V PWM, +20V Switching reg. J801 CR801 +12V U806 HEATER (+7.6V) S801 MAG.CUR -12V J830 (RS-1) LEAD SW Overcurrent Det.

  • Page 23: Different Points Of Similar Pcbs

    2.4!Different Points of Similar PCBs Different Points of Similar PCBs 1. How to set SPU (SPU-9211) Board For use the SPU board in the MODEL 1932MK2 or 1942MK2, change the factory menu as below. While pressing and holding down the GAIN (HM-OFF) control, press the [MENU] key five times to display the factory menu.

  • Page 24: Chapter 3. Adjustment

    Chapter 3. Adjustment WARNING IMPORTANT! SAFETY INFORMATION Be sure to read all the safety information which follows before perfoming any adjustment. Hazardous Voltage This equipment uses high voltage electricity which can SHOCK, BURN or cause DEATH. Always make sure the electrical power is turned off before attempting to change a component or inspecting the inside of the equipment.

  • Page 25: Adjustment Of Display Unit

    3.1 Adjustment of Display Unit Adjustment of Display Unit Location of PCBs in Display Unit M1832-SME-27 Figure 3-1 Display Unit, Front Side of View POWER CONNECTOR OPTION DJ-1 CONNECTOR CONNECTOR HDG CONNECTOR NMEA2 CONNECTOR M1832-SME-28 NMEA1 CONNECTOR Figure 3-2 Display Unit, Rear Side of View...
  • Page 26 3.1 Adjustment of Display Unit 18P9007 (Option) SPU-9211 SPU-9211 M1832-SME-28B M1832-SME-28A Figure 3-3 Inside of Display Unit, Right Side of View FIL-9206 INT-9213 M1832-SME-29 Figure 3-4 Front Panel, LCD removed PTU-9205 Board M1832-SME-29A Figure 3-5 LCD Display, 02P6225 board removed...
  • Page 27 3.1 Adjustment of Display Unit Line Voltage Item Ratings Test Point Remarks +12 V 12.1 to 12.3 V DJ1-10 (+) -DJ1-20 (-) +5 V 4.9 to 5.2 V DJ1-23 (+) -DJ1-20 (-) ST-BY –12 V –11.6 to –12.8 V DJ1-14 (+) -DJ1-20 (-) ANT 12 V 12.0 to 12.3 V DJ1-1 (+) - DJ1-20 (-)
  • Page 28 3.1 Adjustment of Display Unit Location of parts on SPU-9211 J102 J107 J106 J109 J105 J104 J108 J101 J103 M1832-SME-30 Figure 3-6 SPU-9211 Board Test point on SPU-9211 Test Point Test Item Ratings Remarks TP 1 BEARING Pulse 0.7 Vpp (180 Hz, 450 pulses/rotation) TP 2 TRIGGER...
  • Page 29 3.1 Adjustment of Display Unit Location of parts on 18P9007 (ARP) P107 M1832-SME-31 Figure 3-7 18P9007 Board Test point on 18P9007 (ARP) Test Point Test Item Ratings Remarks TP 1, 9 TP 2 41.6 MHz TP 4 TRUE TRIGGER 5 Vpp (Neg. Polarity) TX Condition TP 7 CLK OUTPUT...
  • Page 30 3.1 Adjustment of Display Unit Location of parts on PTU-9205 J1301 TP31 TP32 M1832-SME-32 Figure 3-8 PTU-9205 Board Test point on PTU-9205 Test Point Test Item Ratings Ratings Remarks TP 1 +10 V 8.2 to 9.5 V TP 2 DC (-) TP 3 Inverter Frequency 85.5 to 94.5 kHz...
  • Page 31 3.1 Adjustment of Display Unit Location of parts on CRT Board M1832-SME-29B NOTE: The CRT is used with the rotation by 90 degrees. Therefore, the indications "V" and "H" correspond to horizontal and vertical, respectively. Adjustment of CRT FOCUS L2(WIDTH) VR4(FOCUS) CONTRAST VR1(CONT)
  • Page 32 3.1 Adjustment of Display Unit Synchro pulses and video signal 4.97 S 4 V approx. Horizontal Synchro Pulse (15.77kHz) 63.4 S 6.22 S 2.49 S 0.7 to 3.6 Vpp Video Signal 49.72 S Timing Chart Between Horizontal Synchro pulses and video signal 0.63mS 4V approx.

  • Page 33: Adjustment Of Scanner Unit

    3.2 Adjustment of Scanner Unit Adjustment of Scanner Unit Magnet for heading sensor (covered) Scanner Motor 24 rpm : RM-8025 48 rpm : RM-8711 Transceiver Unit 1932MK2 : RTR-064 1942MK2 : RTR-059 Figure 3-10 Scanner Unit, cover opened (RTR-059, 24 rpm) 3-10...
  • Page 34 3.2 Adjustment of Scanner Unit IF AMP Board (IF-9214) RTB Board (03P9249) J827 J821 J823 J822 J824 J825 J828 J829 J826 Figure 3-11 Transceiver Module, Top View Magnetron (RU-9390) 1932MK2 : E3571 1942MK2 : MG5389 Circulator (RC4365) Figure 3-12 Transceiver Module, Top View MODULATOR Board (03P9235) Figure 3-13 Transceiver Module, Bottom View...
  • Page 35 3.2 Adjustment of Scanner Unit IF AMP Board, IF-9214 VC1 VC2 Figure 3-14 IF AMP Board, IF-9214 Check Points and Ratings Check Point Check Item Ratings Remarks TP 1 Band width Factory-use VC1 and VC2 TP 2 IF Signal Factory-use TP 5 +7 V 5.9 to 7.5 V...
  • Page 36 3.2 Adjustment of Scanner Unit MODULATOR Board, 03P9235/03P9235A J804 J801 J803 TP804 VR802 TP801 VR801 TP802 J806 Figure 3-15 03P9235 Board Check Points and Ratings Check Point Check Item Ratings Remarks TP801 TX-trigger Positive, 8 to 12 V Pulse width: 10 to 20 us in all ranges PRR: 2000 to 2300 Hz (Short ranges) TP802...

  • Page 37: Chapter 4. Maintenace

    Chapter 4. MAINTENACE Remarks on Replacement of Major Parts Turn off the power before replacing any parts Do not touch the magnetron while the radar is transmitting. Sufficient high voltage exists at the magnetron to cause death. MAGNETRON The magnetron emits a strong magnetic field. For this reason, remove wristwatch before performing the replacement and use a non-magnetic screwdriver to dismount the magnetron.

  • Page 38: Life Expectancy Of Expendable Parts

    4.2 Life Expectancy of Expendable Parts The SPU board uses Flush ROM (U36) to store a system program. The program version number can be checked at "23. Self check" on the MAIN menu. [Self test] Key test: Press each key and check on-screen indication lights ARP-10 TEST...

  • Page 39: Menu

    4.3 Menu Menu MENU KEY RINGS (Off, 1, 2, 3 , max) EBL OFFSET (Off , On) SHIFT (Off , On) ZOOM (Off , On) MODE (HU , CU, NU, TM) DISP DATA ECHO TRAIL (Off , On) ECHO STRTCH (Off , ES1, ES2) 1.

  • Page 40: Chapter 5. Troubleshooting

    Chapter 5. Troubleshooting Outline This chapter provides troubleshooting flow charts and describes error messages. Error messages When there is no bearing pulse signal the display unit shows BP-SIG-MISS and when there is no heading signal, HD-SIG-MISS. Check the antenna cable when those indications appear. Troubleshooting flow charts The troubleshooting flow charts help the service technician to diagnose problems.

  • Page 41: Troubleshooting Flow Charts

    5.3 Troubleshooting Flow Charts Troubleshooting Flow Charts Start Turn power on. Nothing appears Flow chart 1 on display. No echoes nor Flow chart 7 white noise. Abnormal display. Flow chart 2 Poor sensitivity. Flow chart 8 Flow chart 3 No heading data. No GAIN, STC, Flow chart 9 FTC effect.
  • Page 42 5.3 Troubleshooting Flow Charts Symptom: Nothing appears on the screen. Flow chart 1 No ( No power) Keys beep when Check in-line fuse . pressed. Yes ( Equipment is powered) Faulty CRT assy. CRT heater lights? OK ? (Type: QB1069) Replace fuse, turn on power.
  • Page 43 5.3 Troubleshooting Flow Charts Symptom: Abnormal display. Flow chart 2 Check horizontal sync, * See page 2-4 for vertical sync and video waveforms. output signals at J102 #2, #4, #5 on pcb SPU-9211. Faulty pcb SPU-9211 OK ? Check if CRT brilliance is not set to minimum with BRILL control.
  • Page 44 5.3 Troubleshooting Flow Charts Symptom: No heading data. Flow chart 3 AD format Heading data format. NMEA 0183’s HDT, HDM, HDG Blank Heading data indication. * * *. * Heading data Blank indication. Check CLK data at HDG connector #3, #4 on displau unit.
  • Page 45 5.3 Troubleshooting Flow Charts Symptom: No nav data. Flow chart 4 All data shown by asterisks or blank. Nav data indication. Some data shown by Check RD NMEA1/2 asterisks or blank. connector #3,#4 on display unit with oscilloscope. Check nav equipment’s output sentences.
  • Page 46 5.3 Troubleshooting Flow Charts Symptom: Key(s) inoperative Flow chart 5 Warm up countdown. Faulty pcb SPU-9211. Faulty VR1 or VR2 on pcb PNL-9212, S1 to S12 on pcb Only one key is faulty. PNL-9212 Faulty lines #10 and #11 (KEY 2) of W301 on PNL-9212. Single vertical row only.
  • Page 47 5.3 Troubleshooting Flow Charts Symptom: Antenna dose not rotate. Flow chart 6 Antenna dose not rotate. Stop Menu setting ? Change "Scan stop" setting to "Rotate". (Installation menu) Rotate 0 V (DJ-1 #1) when TX key is pressed. MOTOR(+) on DJ-1 connector.
  • Page 48 5.3 Troubleshooting Flow Charts Symptom: No echoes nor white noise. Flow chart 7 GAIN VR at maximum. Set GAIN VR at maximum. Confirm GAIN control voltage with VR fully CW. Is J101 #15 on SPU- Faulty VR1 on PNL-9211 Board. 9211 about 0V.
  • Page 49 5.3 Troubleshooting Flow Charts Symptom: Poor sensitivity Flow Chart 8 From Check TOTAL ON TIME/ Check that DJ-1 #18 on TOTAL TX TIME. (page 5-11) display unit changes normal. Magnetron usage Install new time within about magnetron. Check if video signal 2000 hrs.
  • Page 50 5.3 Troubleshooting Flow Charts From on page 5-10 Check TX high voltage at ST-BY. (J803 #1/#6) Within rating ? Faulty MD Board (11.0 to 12.3V) Check magnetron heater voltage at ST-BY. Within rating ? (7.55 to 7.65V) Check magnetron heater Adjuster: VR 801 on MD Board voltage.
  • Page 51 5.3 Troubleshooting Flow Charts From on page 5-10 Signal 0.25 NM 2 NM 12 NM Check TX pulselength PL B, DJ-1 #7 12 V selection signal. PL A, DJ-1 #8 12 V 12 V Check DJ-1 #7,#8 on Faulty pcb SPU-9211. display unit for proper operation.
  • Page 52 5.3 Troubleshooting Flow Charts Symptom: No GAIN, STC, FTC effect. Flow Chart 9 Check voltage at Faulty VR1 on PNL-9212 board. GAIN can be adjusted. J101 #15 on SPU board. MIN : approx. - 9 V MAX : 0 V Faulty pcb SPU-9211.
  • Page 53 5.3 Message Indications Symptom: Target cannot be acquired Flow chart 10 AD format HD data * Heading data in NMEA 0183 cannot be used for ARP. supplied? 200msec Transfer rate. Change the rate to 25msec. 25msec NG (Indication of ARP-10 is not connected) When LED(CR1)on ARP board is off: 18P9007 is faulty.

  • Page 58: Schematic Diagram

    SCHEMATIC DIAGRAMS Title Type Drawing No. Page Remarks Interconnection 1932MK2/1942MK2 C3442-C01 Diagram General Circuit of RDP-118 C3441-K01 Display Unit PNL Board PNL-9212 C3441-K02 INTERFACE Board INT-9213 C3441-K03 POWER Board PTU-9205 C3441-K04 Monitor Circuit QB1069 C3319-K05 General Drawing of RSB-0070/73/82/83 C3459-K02 Scanner Unit 03P9235/A03P9235 C3459-K04...

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1942 mk2

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