Furuno FR-2115 Service Manual
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Furuno FR-2115 Service Manual

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MARINE RADAR
FR-2115/2125

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Summary of Contents for Furuno FR-2115

  • Page 1 Back MARINE RADAR FR-2115/2125...
  • Page 2 FURUNO E L E C T R I C C O., LT D. Yo u r L o c a l A g e n t / D e a l e r 9 - 5 2 , A s h i h a r a - c h o ,...

  • Page 15: Table Of Contents

    CONTENTS Chapter1. GENERAL 1.1Outline................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 Block Diagram of Display Unit........2-2 Function of Each Board (Display Unit) ......2-3 Start-up Sequence ............2-5 ARPA start-up sequence..........2-6 Block Diagram of Display SPU Board ......2-7 Video Signal Flow ............2-8 Block Diagram of SPU Board (Video Amplifier) ...2-9 Auto Tuning Function ............2-10...
  • Page 16 Location of Major parts ..........3-2 Adjustment of CRT............3-5 3.2 Adjustment (Scanner Unit) ......... 3-15 FR-2125 (RTR-063) ............3-17 FR-2115 (RTR-062) ............3-21 Chapter 4. MAINTENANCE 4.1 Dip Switches..............4-2 4.2 Jumper Settings ............4-3 4.3 LED Status ..............4-4 4.5 Notice on Replacing Major Parts........

  • Page 17: Chapter1. General

    Chapter 1. GENERAL 1.1 Outline This manual provides the information necessary for the servicing and adjustment of the radars FR-2115 and FR-2125. The antenna unit uses a Log IF amplifier. The features are; 6 pulselengths enabling echo size on the screen to be similar in all ranges...

  • Page 18: Boards & Major Components

    1.2 Boards & Major Components DISPLAY UNIT Board Name FR-2115 FR-2125 SPU Board 03P9253 PTU (PWR) Board DC : 03P9246, AC : 03P9245 FILTER Board DC : 03P9226, AC : LF-210 TX-HV Board HV-9017A HV-9017B PANEL Board (in control head)

  • Page 19: Specifications

    1.3 Specifications SCANNER UNIT ITEM FR-2115 FR-2125 Radiator Type Slotted Waveguide Array Radiator Length 4 ft 6.5 ft 8 ft (XN12AF) (XN20AF) (XN24AF) Horizontal Beamwidth 1.8 deg. 1.23 deg. 0.95 deg. Vertical Beamwidth 20 deg. Within +10 deg. to –10 deg. of –28dB or less...
  • Page 20 DISPLAY ITEM FR-2115 FR-2125 Picture Tube PPI (Raster scan, Daylight display) IMO type; FR-2115/2125: 96 nm Non-IMO type; FR-2115 : 72 nm, FR-2125 : 120 nm Range Scale (nm) 0.125 0.25 0.75 Range Ring lnterval 0.025 0.05 0.25 0.25 Number of Rings Bearing Resolution 1.8 deg.
  • Page 21 ENVIRONMENTAL CONDITIONS ITEM FR-2115 FR-2125 Scanner Unit 25 deg. to +70 deg. Ambient Temperature Display Unit 15 deg. to +55 deg. Humidity Relative humidity 95% or less at +40 deg. Vibration IEC 945, Edition 3 POWER SUPPLY & POWER CONSUMPTION...

  • Page 22: Chapter 2. Block Description

    Chapter 2. BLOCK DESCRIPTION 2.1 Overview Outline Figure 2.1 Simplified block diagram The trigger pulse from the SPU (Processor) Board is delivered to the MODULATOR Board which outputs the signal to oscillate the magnetron, and then radar wave is emitted from the radiator.

  • Page 23: Block Diagram Of Display Unit

    2.2 Block Diagram of Display Unit To degauso coil MOTHER INT Board(03P9252) MOTHER SPU Board(03P9253) Board H SYNC(64 kHz), Board Color palette V SYNC(60 Hz), (03P9251) D/A CONV. DOT CLK(108.5 MHz) P.F. Signal from PWR Board (03P9251) Selection SW Buffer (Menu-Selection) RP Board(14P0298) Scanner Unit...

  • Page 24: Function Of Each Board (Display Unit)

    Function of Each Board (Display Unit) Board Name Function 1) Contains a video amplitier circuit. (a) Applies GAIN, STC, FTC and IR to video signal and outputs to the A/D converter. (b) Adjusts video signal input level (adjusted by pot. VR140). (c) Changes STC curve according to the antenna height set on the Radar menu.
  • Page 25 Board Name Function 1) Outputs encoded data of EBL, VRM and trackball signals. 2) Includes GAIN, STC, FTC, and BRIL volumes. PNL Board 03P9255 3) Includes EBL ON/OFF, VRM ON/OFF, FUNC 1/2/3/4, and Range +/- keys. 4) Reads PAL/PAR board status. 1) Includes ANT ON/OFF, Performance monitor ON/OFF, and degauss switches.

  • Page 26: Start-Up Sequence

    Start-up Sequence Radar start-up sequence Process 1. The soft start circuit activates to protect the power ON/OFF relay contacts. 2. The input voltage monitor checks for abnormal voltage. When ship’s mains is abnormal the ON/OFF relay trips off. 3. The inverter comes on and outputs all line voltages. The LED comes on and the inverter goes off when overcurrent is detected.

  • Page 27: Arpa Start-Up Sequence

    ARPA start-up sequence Power ON * A reset pulse is generated when +5 V line drops to about 4.2 V. (03P9253) ARPA(18P9002) RADAR Initializes NAIN CPU. Initializes DSP. Initializes SPU Board. CR17 on pcb Communicate with Initializes DSP RAM 18P9002 blinks DPRAM on ARPA (between DSP and every two seconds.
  • Page 28 Max. brilliance : 0.7 Vpp 4 Vpp P551 TP4(VIDEO) U72:VlEVEL 0 U73:VlEVEL 2 From RP-26 Video Trigger Gen. U74:VlEVEL 4 (Video) U75:VlEVEL 6 Even Echo Selector µs VIDEO Handling Signal U76:VlEVEL 8 U77:VlEVEL 10 Processing, Video Amplifier R134 Echo Video P552 U78:VlEVEL 12 Echo...

  • Page 30: Block Diagram Of Spu Board (Video Amplifier)

    Block Diagram of SPU Board (Video Amplifier) about 4 Vpp VIDEO IN Buffer A/C AUTO : OFF R140 about 4 Vpp VIDEO about 4.2 Vpp (Adjust by R140) (To ARPA Board:P551 A18) A/C AUTO : ON TP11 TP12 about 4.0 Vpp Video Inverter Gain &...

  • Page 31: Auto Tuning Function

    Auto Tuning Function The system provides auto tuning mode which eliminates the adjustment of the receiver for maximum echoes. The “Tune Initialization” is required after not only the installation but also the replacement of RF unit, magnetron, MIC, and SPU board, so that the tune control voltages for each pulse are memorized onto the EEPROM.

  • Page 32: Tuning Indication

    Tuning Indication The tuning indicator extends more than 80% of its full length on all ranges at best tuning. The self-test result display reads the tune indicator voltage. Manual Tuning When tuning mode is changed from auto to manual mode, the tuning control voltage (a) found in full search is selected.

  • Page 33: Echo Averaging (Eav 1/2/3)

    Echo averaging (EAV 1/2/3) Remarks on the echo-averaging feature Echo averaging is a useful feature when used properly. If used improperly, however, the result could be disastrous. Objective and principle of echo averaging The main objective of echo averaging is to discriminate targets (flocks of birds, other ships, fishing floats, etc.) hidden in sea clutter, and stably display long range targets (ship, buoy, island, etc.) which alternately appear and disappear on the screen.

  • Page 34: Memories & Memory Frame Priority

    360 dots. 2048 dots 1280 dots 360 dots 1024 dots 2048 dots FR-2115-SME-28 Figure 2.9 Memory Capacity and Display Area U24,U26,U28,U29,U30 (5 frames) Radar echo Each 3/4 of U8 and U9 (3 frames) Echo trail Echo in...
  • Page 35 2-14...

  • Page 36: Check Of Arp And Rp Board Connection

    Check of ARP and RP board Connection The system checks the connection of the ARP and RP board every power on. If the CPU on the SPU board fails to communicate with the ARPA or RP board, the related display does not appear on the screen, but also the ARP and/or RP line is not displayed on the self-test result display.

  • Page 37: Simple Arpa Block Diagram

    Simple ARPA block diagram 2-16...

  • Page 38: Arpa Block Diagram

    ARPA block diagram TP12 +12 V TP11 Noise blanker -12 V TRIG TP10 +5 V PLL VCO FIFO VIDEO A/D Converter TP6 TP7 R103 R104 (MAX) (MAX) Video CR32 signal Comparator check Video TP9(QV monitor) TRIG Sweep Check Velocity QV output Converter check check...

  • Page 39: Arpa Target Acquisition And Tracking

    ARPA target acquisition and Tracking 1. Conditions for manual acquisition The target can be acquired manually under the following conditions. 1) An echo from target must be received for three consecutive sweeps and scans within the acquisition area. 2) The target echo must be smaller than the and echo data (at the front end processor). 3) A target must be within the acquisition area : 0.2 to 32 nm.

  • Page 40: Arpa Initial Setting Menu

    ARPA INITIAL SETTING MENU Accessing Menu for ARPA Initialization. Press the [RADAR MENU] key five times while pressing and hold- ing down the [HL KEY] key. ARPA INITIAL SETTING Menu (Keying sequence : [PLOT MENU] [0] [0]) TARGET SELECT Selected is minimum size of target echoes which will be judged as land. An echo judged as land cannot be acquired manually or automatically nor is lost target status generated.
  • Page 41 TARGET OUTPUT DATA Output setting of “RATTM” data, output by J454 on the INT Board. : “RATTM” data not output. : “RATTM” data output. Target course shown in relative bearing. TRUE : “RATTM” data output. Target course shown in true bearing. DISP CPA,TCPA Selects wether CPA and TCPA are displayed or not on the screen.
  • Page 42 CPU2 STATUS = 0000 Shows CPU2 status. 0 if normal. LOG SENSOR Log sensor type. EXT SPEED IEC-61162 serial speed data being received; VTG/VHW/VBW If no serial data, xxx.x appears. EXT COURSE IEC-61162 serial bearing data being received; VTG/VHW/VBW :KHQ#VSHHG#GDWD#LV#EHLQJ#IHG#IURP#D#VSHHG#ORJ#RU#HQWHUHG#PDQXDOO\/ # # # # # # # # # # # # # # # # # # # # # # # # # # WKH#FRXUVH#GDWD#LQ#9+:#LV#XVHG1 [INPUT SIG CHECK2] (Keying sequence : [PLOT MENU] [0] [8] [0])

  • Page 43: Block Diagram Of Rp Board

    Block Diagram of RP Board The RP System program is stored on the flash POM, U3 and the program update is performed by using the program card. The card must be inserted into the upper slot. The CR1 on the RP board lights when the program is replaced with new one. RP marks are generated in the following VRAMs or frames on the RP board respectively, and sent to the SPU board.

  • Page 44: Input/Output Data On Int Board (03P9252)

    INPUT/OUTPUT Data on INT Board (03P9252) Port Name Equipment I; input, Signal Name Signal Format Remarks Connectable O: output Timing between TRU-TRIG and J442 (O) TRUE-TRIG, VIDEO Radars having Slave display VIDEO adjusted, HD adjusted, ,TRU-HD, BP slave func-tion J443 (O) BP:360 pulse/rotation.

  • Page 45: Sentences Receivable At J450 On Int-9170

    Sentences Receivable at J450 on INT-9170 Data to be displayed O S & RNG & Water W a t e r Date & ARP-26 ARP-26 Sentence Cursor BRG to Temp. Depth Time External Position 2-24...

  • Page 46: Radar And Arpa Output Signal From Int-9170

    Radar and ARPA output signal from INT-9170 (J442, J443 and J444) TRIG Signal (TRIG) Polarity/Voltage : Positive, +12 V Pulselength : 4 µs (J444) 5 to 10 µs (J442/J443) VIDEO Signal (VIDEO) Polarity/Voltage : Negative, 4 Vpp Characteristic : Input of amplifier GAIN/STC : Not controlled BEARING Signal (BP) Pulse : 360 pulses/one ant.

  • Page 47: Monitor Signal From J449

    Monitor signal from J449 (requires buffer circuit) 1. CRT required (non-interlace) 370 mm(1280 dots) 275 mm 295 mm (720 dots) (1024 dots) 2. Video signal H - sync signal 63.974 kHz (15.63 us), 1696 dots 1.18 us,128 dots 0.59 us, 64 dots 11.80 us,1280 dots 2.06 us, 224 dots Video signal...

  • Page 48: Power Supply Circuit (Dc)

    Power Supply Circuit (DC) DC PWR Board (03P9246) The PWR board contains a main-inverter, a sub-inverter, and protectors. The main-inverter produces +24 V and +32 V (for scanner motor), while the sub-inverter produces –12 V, +12 V, +32 V, and +140 V from +24 V, output of the main-inverter. +5 V is generated by chopping +24 V.
  • Page 49 2-28...

  • Page 50: Power Supply Circuit (Ac)

    Power Supply Circuit (AC) AC PWR Board (03P9245) The PWR board contains a main-inverter, a sub-inverter, and protectors. The main-inverter produces +24 V and +32 V (for scanner motor), while the sub-inverter produces –12 V, +12 V, +32 V, and +140 V from +24 V, output of the main-inverter. +5 V is generated by chopping +24V.
  • Page 51 2-30...

  • Page 52: Scanner Unit

    The mounting dimensions, the size of the gear box, and cabling layout have not been changed from the traditional Furuno radars. Changed is the radiator mounting bracket for a new radiator. The gear box can be equipped with a motor of either 24 rpm or 42 rpm type.
  • Page 53 2-32...

  • Page 54: Chapter 3. Adjustment

    Chapter 3. 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. A residual charge may exist in capacitors, even with the equipment turned off.

  • Page 55: Adjustment (Display Unit)

    3.1 Adjustment (Display Unit) Location of Major parts Figure 3.1 Display Unit, front view Control panel Handle Stay Display pedestal This cover is removed to gain access to SPU, ARP, and RP Boards. Figure 3.2 Display Unit, inside view...
  • Page 56 Mother Board (03P9251) DTB-2 (T.B.) GC-8 Board (64P1106) TX-HV Board INT Board (HV-9017) (03P9252) RP Board (14P0298) ARP Board (18P9002B) SPU Board Figure 3.3 Display pedestal, cover removed (03P9253) TX HV Fuse (F3 : 0.5 A) SPU Board RF Video Video Level Level Adjuster :...
  • Page 57 PTU Board (AC : 03P9245, DC : 03P9246) Shield cover removed Figure 3.5 Display Unit, top view, drawing forward Power Switch for Maintenance Fuse (F1) Fuse (F2) Figure 3.6 Display pedestal, for side, shield cover removed...

  • Page 58: Adjustment Of Crt

    VIDEO Board IF3-A10 Board (PBH173) (UBH188) SCREEN FOCUS HV ADJ SOCKET Board (UBH182) CRT ADJ Board (PBH132-1) DEGAUSS Board (PDM9025) MAIN Board INT Board (PBH172-0) PBH183-0 HPOSI Under the cover Figure 3.7 Display Unit, top view, cover removed Adjustment of CRT The CRT is adjusted by pressing the buttons on the CRT ADJ Board.
  • Page 59 2) Display Size Press the MENU button on the CRT ADJ Board, PBH132-1 and the following menu will appear on the screen. Steps Ratings 1) Set the radar to TX. 1) Radar display area must be 2) Select the background color to blue : 280 3 mm.
  • Page 60         Location of parts on SPU 03P9253 Board TP1 CR8 CR7 CR6 CR5 CR4 CR3 CR2 CR1 TP11 TP13 TP12 TP8 TP7 R140 TP4 TP3 TP2 Test points and Ratings TP No. Signal Rating Condition (except for maximum...
  • Page 61         Location of Parts on ARP 18P9002 Board R103 CR14 CR13 CR16 CR15 CR12 CR11 CR10 CR9 CR17 CR1 R104 (U64) ROM (U3) JP11 TP11 TP12 TP10 TP4 TP3 TP2 ROM (U40) Test points and Ratings Signal Rating Condition...
  • Page 62         Location of Parts on RP 14P0298 Board Battery (BT1) Flash ROM (U3)
  • Page 63         Location of Parts INT Board 03P9252 J450 J445 J457 J454 J442 J448 J469 J455 J458 J446 J468 J443 J466 J453 J467 J444 J462 J451 J445 J463 J471 J456 J465 R151 R153 TP4 J452 TP5 R134 Test points and Ratings TP No.
  • Page 64         Location of Parts on GYRO Board 64P1106 CR21 CR22 Test points and Ratings TP No. Signal Rating Condition +5 V 5.19 to 5.21 VDC, adjusted by R42 3-11...
  • Page 65         Location of Parts on PTU Board, for DC set 03P9246 VR91 VR71 CR12 CR11 JP91 JP92 J105 VR51 J104 J103 Test points and Ratings TP No. Signal Rating Condition J104 +140 V 138 to 142 VDC, adjusted by VR51 # 1(+) &...
  • Page 66         Location of Parts on PTU Board, for AC set 03P9245 CR12 CR11 JP3 JP91 VR91 JP92 J105 VR51 J104 VR71 J103 Test points and Ratings TP No. Signal Rating Condition J104 +140 V 138 to 142 VDC, adjusted by VR51 # 1(+) &...
  • Page 67 Location of Parts on HV-9017 Board J481 J482 CR21,RED CR23, GRN TP3 TP4 Test points and Ratings TP No. Signal Rating Condition 34.7 to 35.3 VDC, adjusted by VR1 TP1 and TP2 0 V line Sub inverter 42.75 to 47.25 kHz TP3 and TP2 switching freq.

  • Page 68: Adjustment (Scanner Unit)

    3.2 Adjustment (Scanner Unit)                          Figure 3.9 Scanner Unit, side view (XN-20AF        Figure 3.10 Antenna radiator, bottom view (XN-20AF) !" #        ...
  • Page 69 &     #   '(")*      Figure 3.12 Scanner Unit, stern side, cover removed &   +    -./  ,   #      Figure 3.13 Scanner Unit, stern side, cover and RF module removed #   0+1 431 7 23 - 2 .3"4516...

  • Page 70: Fr-2125 Rtr-063

            FR-2125 RTR-063 Circulator (RC-3686) RFC Board (03P9243B) (RU-9253/9371) IF Amp Board (03P9232) VR1 on MODULATOR Board (03P9244B) for magnetron current adjustment Figure 3.15 RF module, top view MODULATOR Board (03P9244B) Pulse Transformer Magnetron (RT-9023) (MG5436)
  • Page 71         Location of Parts on IF AMP 03P9232 Board VR601 TP606 TP604 TP607 TP605 TP603 TP608 TP602 Test points and Ratings TP No. Signal Rating Condition TP601 Output of U601 Factory-use TP602 Output of U603 Factory-use TP603 TUNING IND.
  • Page 72         Location of Parts RFC 03P9243B Board Test points and Ratings TP No. Signal Rating Condition J801 # 12(+) MAG HEATER. 8.2 to 8.4 VDC(S1) , adjusted by VR1 ST-BY & # 11(-) 6.5 to 7.5 VDC(L) 3-19...
  • Page 73         Location of Parts on MODULATOR 03P9244B Board Test points and Ratings TP No. Signal Rating Condition 03P9243, MAG CUR. Less than 0.15 V(ST-BY) J801 # 13(+) 7.4 to 8.1 VDC(Long range, TX), &...

  • Page 74: Fr-2115 Rtr-062

            FR-2115 RTR-062 Circulator (RC-3686) RFC Board (03P9243A) (RU-9253/9371) IF Amp Board (03P9232) VR1 on MODULATOR Board (03P9244A) for magnetron current adjustment Figure 3.17 RF module, top view MODULATOR Board (03P9244A) Pulse Transformer...
  • Page 75         Location of Parts on IF AMP 03P9232 Board VR601 TP606 TP604 TP607 TP605 TP603 TP608 TP602 Test points and Ratings TP No. Signal Rating Condition TP601 Output of U601 Factory-use TP602 Output of U603 Factory-use TP603 TUNING IND.
  • Page 76         Location of Parts on RFC 03P9243A Board Test points and Ratings TP No. Signal Rating Condition 7.4 to 7.6 VDC(S1), adjusted by VR1 J801 # 12(+) MAG HEATER. ST-BY & # 11(-) 3-23...
  • Page 77         Location of Parts on MODULATOR 03P9244A Board Test points and Ratings TP No. Signal Rating Condition 03P9243 MAG CUR. Less than 0.15 V(ST-BY), J801 # 13 4.6 to 5.3 VDC(Long range, TX), &...

  • Page 78: Chapter 4. Maintenance

    Chapter 4. MAINTENACE 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. A residual charge may exist in capacitors, even with the equipment turned off.

  • Page 79: Dip Switches

    4.1 DIP Switches DIP switch S1 on the ARP Board (18P9002) and RP Board (14P0261) changes the specifications of radars. 14P0298 Board 18P9002 Board Figure 4.1 Display pedestal, inside view Description Default Memory clear Not used Not used Not used Description Default Baud rate of...

  • Page 80: Jumper Settings

    24 VDC, 42 rpm JP91: No JP92: Yes (PTU Board, DC) R98: 1.2 k ohms JP1: 300 V HV-9017A 10 kW (FR-2115) JP2: 330 V JP1: 500 V HV-9017B 25 kW (FR-2125) JP2: 330 V INS RX (C) fromat J468: J1-J2...

  • Page 81: Led Status

    4.3 LED Status LED status symbols: : OFF ; : Blinking ; : ON Normal Check Board LED No. Remarks Location of LEDs Status Item CR1 (YLW) KEY TX Board CR2 (YLW) NAV TX Blinks every 3 seconds. (03P9253) CR3 (YLW) RJ7 TX Blinks when RJ-7 is connected.
  • Page 82 LED status symbols: : OFF ; : Blinking ; : ON Normal Check Board LED No. Remarks Location of LEDs Status Item Lights when over-current is TX-HV CR21 (RED) Over-cur. detected. Board CR21 CR23 OFF when the line is abnormal. (HV-9017) CR23 (GRN) -12 V...
  • Page 83 4.4 Self-test Test Menu Press [RADAR MENU], [0], [0], [0], [3], and [ENTER] in this order, and the self-test result display will appear after several seconds. Figure 4.2 shows the self-test result display. If any error has been found in circuitry, NG appears instead of OK. The self-test is carried out at every power-up, not when the keys are pressed.
  • Page 84 The ICs checked in the diagnostic test are shown in the table below. For suspect faulty IC. Note that parts level replacement is not possible; replace at board level. Check Item CRAM DRAM Board to be checked MAIN U5, U7 03P9253 U9, U10 U4, U11...

  • Page 85: Notice On Replacing Major Parts

    EBL/VRM/Trackball Test Pressing the key and rotating the trackball increases or decreases the number on the screen. Test Pattern Pressing the STBY TX key calls up the test pattern composed of circles, squares, and diagonal lines. 4.5 Notice on Replacing Major Parts MAGNETRON NOTE) The magnetron emits a strong magnetic field.

  • Page 86: Program Numbers

    4.6 Program Numbers 1) The following summarizes the programs used in the system. The radar and RP programs are stored on the flash ROM, and the ARP program on the PROM. 2) How to switch between English and Japanese Versions The following key operation can change the English menu to the Japanese one, and vice versa.
  • Page 87 3. Disconnect the interconnection cable. 4. Turn off the radar and turn on again. Confirm the program revision level. RP Program The program is stored onto the flash ROM, U3 on the RP board. 1. Insert the program card into the upper card slot. 2.

  • Page 88: Alternation Of Power Supply

    4.8 Alternation of Power Supply The following tabulates the necessary parts to be changed when the radar is modified from AC specification to DC specification and vice versa. From AC to DC Parts Name Type Code No. Remarks PTU Board (DC) RPU-011-DC (24 rpm) 008-487-440 03P9246...

  • Page 89: Chapter 5. Troubleshooting

    Chapter 5. TROUBLESHOOTING 5.1 Outline This chapter provides troubleshooting flow charts and describes error messages. 5.2 Error Message When no bearing pulse signal is input to the display unit, BP-SIG-MISS is indicated, and when no heading signal, HD-SIG-MISS. Check the antenna cable when those indications appear. Visual Alarms Visual alarms appear on the display to alert the operator that the system is abnormal.
  • Page 90 General Flow Charts...
  • Page 91 Symptom: Nothing appears on the display Flow chart 1 *Maintenance switch is provided only on No (No power) Confirm that AC sets. Keys beep when maintenance SW is on. pressed. Yes (Equipment is powered) NG(set to front side) Faulty CRT assy. CRT heater lights? (Type : CDT2163B) Defective 140 Vcc line...
  • Page 92 Symptom: Abnormal display Flow chart 2 *See block diagram Check horizontal sync, of SPU board. vertical sync and video output (MOTHER Pcb, 03P9251,J418 #1,2,3,13,14) OK ? Defective 03P9255 (SPU) Adjust BRIL control. CRT brilliance ? OK ? Picture is synchronized Adjust BRIL on automatically.
  • Page 93 Symptom: No heading data Flow chart 3 Blank Heading data indication ? ***.* Check CLK data at INT board, J446 #3,#4 . Power OFF and ON. Faulty pcb 03P9253 (Normal) Faulty heading sensor or its interconnection Heading data from the sensor cable.
  • Page 94 Symptom: No nav data. Flow chart 4 All data shown by asterisks or blank. Nav data indication ? Some data shown by asteriska or blank. Check LED(CR6) on 03P9253. Check nav equipment's output sentences. Select correct sentence. Wrong data sentence Faulty pcb 03P9253 or Faulty nav equipment or interconnection cable.
  • Page 95 Symptom: Key(s) inoperative Flow chart 5 Warm up Faulty pcb 03P9253. countdown. Faulty S1 to S11 on pcb 03P9255, Only one key S1 to S19 on pcb 03P9256. is faulty. Single vertical row only. Single vertical Defective signal line row of keys Faulty pcb 03P9255(U1).
  • Page 96 Symptom: Antenna does not rotate Flow chart 6 Antenna does not rotate. ANT SW position ? Turn on the SW. 0V (DJ-1 #23, #25) when TX key is pressed. MOTOR +/- signal on DJ1. +24V (DJ-1#23, #25) several seconds after TX key is pressed.
  • Page 97 Symptom: No echoes nor white noise Flow chart 7 GAIN VR at Set GAIN VR at maximum. maximum. Check GAIN control voltage with GAIN VR fully CW. (#15 of U100 on SPU) Faulty VR4 on 03P9255 Board. 0V ? Check video signal White noise.
  • Page 98 Symptom: Poor sensitivity Flow chart 8 Check TOTAL ON TIME/TOTAL TX TIME. Replace Less than magnetron. 2000 hrs ? Manual tuning ? Poor sensitivity To 1) No echo; poor (page 5-11) sensitivity. Check maximum gain is obtained with maximum No echo (White noise appears) tuning indication.
  • Page 99 Check puselength PW B,DJ1 #13 L select signals. PW C,DJ1 #1 PW A, PW B, PW C Faulty pcb 03P9253. are normal ? FR-2115 : 4.6 V ‘ 5.3 Vdc (L) Measure magnetron FR-2125 : 7.4 V 8.1 Vdc (L) ‘...
  • Page 100 Measure TX-HV in ST-By mode. FR-2125: 520 to 580Vdc Rating Faulty PCb HV-9017 FR-2115: 7.4 V to 7.6 Vdc (S1) Check magnetron FR-2125: 8.2 V to 8.4 Vdc (S1) heater voltage in 6.5 V to 7.5 Vdc (L) ST-By mode.
  • Page 101 Symptom: No GAIN, A/C SEA, A/C RAIN effect Flow chart 9 GAIN can be adjusted. Check voltage at Faulty VR4 on 03P9255 board. U100 #1 on 03P9253 . MIN : approx. -7 V MAX : approx. 0 V Faulty pcb 03P9253 A/C SEA can be adjusted.
  • Page 102 Symptom: Target cannot be acquired Flow chart 10 AD format HD data *Heading data in NMEA183 cannot be used for ARP. received 200 msec Transfer rate? Select 25 msec, AD format. 25 msec When CR1 on ARP board is off : faulty 18P9002. E PA EPA or ARPA? When CR1 on ARP board is blinking : faulty 18P9002 or 03P9253 .

  • Page 115: Schematic Diagrams

    SCHEMATIC DIAGRAM Drawing Type Drawing No. FR-2115/2125 Page ¡ INTERCONNECTION DIAGRAMS C3464-C01 ¡ RDP-124(AC) C3464-K01 DISPLAY UNIT GENERAL SCHEMATIC ¡ RDP-124(DC) C3464-K19 ¡ 03P9255(1/2) C3464-K04 CENTER PANEL PRINT ¡ 03P9255(2/2) C3464-K05 ¡ 03P9254 C3464-K06 SUB PANEL PRINT ¡ 03P9256 C3464-K07 RIGHT PANEL PRINT ¡...

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