Distributed by

Any reference to Raytheon or RTN in this manual should be interpreted as Raymarine. The names Raytheon and RTN are owned by the Raytheon Company.

~AYTHEO~

Mariners Pathfinder Radar Model 1200 Instruction Manual

RA.\)-\0'"2.

PURPOSE
THIS MANUAL CONTAINS IMPORTANT INFORMATION OF THE INSTALLATION OPERATION AND MAINTENANCE OF YOUR EQUIPMENT RAYTHEON MARINE COMPANY products are supported by a network of Authorized Service Representatiy.e to you location you may contact the following regional centers: Western United States Raytheon Marine Company 20410 Gramercy Place Torrance, CA 90501 Phone: 800-862-5555 (In CA: 800-842-3333) Raytheon Marine Company 676 Island Pond Road Manchester, NH 03103 Phone: 603-668-1600 Rayscan Copenhagen Siljangade 6 DK2300 Copenhagen S Denmark Phone: 451-570611 Raytheon Marine Sales & Service Co. Minato-Ise Building 3-12-1 Kaigandori Naka-ku Yokohama, Japan 231 Phone: 045-212-3633

Eastern United States

Europe

Far East

'''\:' "f

HIGH VOLTAGE WARNING

Do not open any of the units when the radar is ON; high voltages within the Scanner and Display Unit could be fatal to anyone coming in direct contact with them. Disconnect ship's power from the Scanner and Display Unit before attempting env maintenance; otherwise, ship's power will be present at terminals inside the Scanner and Display Unit.

RADIATION HAZARD

Care should be taken to avoid possible harmful effects (particularly to the eyes) of radiation from radar transmissions. To avoid harmful radiation, the Display OPERA TE switch should be turned to the STBY or OFF position when working on the Scanner. Under no circumstances should you look directly into the antenna from a distance of less than 2 feet when the radar is in operation.

CONTENTS

SECTION 1. GENERAL DESCRiPTION 1.1 INTRODUCTION 1.2 PHYSICAL DESCRiPTION 1.3 SPECIFICATIONS

,"

1-1 1-1 1-2 1-4 2-1 2-1 2-4 2-5 2-6 2-9 3-1 3-1 3-1 3-1 4-1 4-1 4-2 4-4 4-5 4-6 4-8 5-1 5-1 5-6 5-14 6-2 6-2 6-9 6-15 7- 1
SECTION 2. OPERATION 2.1 OPERATING CONTROLS 2.2 RANGE AND BEARING MEASUREMENTS 2.3 USING THE CONTROLS 2.4 NAVIGATION WITH THE. RADAR 2.5 FALSE ECHOES SECTION 3. MAINTENANCE 3.1 GENERAL 3.2 SCANNER UNIT 3.3 DISPLAY UNIT SECTION 4. INSTALLATION 4.1 PLANNING 4.2 INSTALLATION OF SCANNER UNIT 4.3 INSTALLATION OF DISPLAY UNIT 4.4 CHANGE ARRANGEMENT FOR SHIP'S MAINS INPUT 4.5 CABLE INFORMATION 4.6 INITIAL OPERATION AND CHECKOUT SECTION 5. ADJUSTMENT AND FAULT FINDING 5.1 ADJUSTMENT 5.2 TROUBLESHOOTING.. 5.3 REPLACEMENT OF MAJOR COMPONENTS SECTION 6. TECHNICAL DESCRIPTION 6.1 BLOCK DIAGRAM DESCRiPTION 6.2 SCANNER UNIT 6.3 DISPLAY UNIT SECTION 7. PARTS LIST

DRAWINGS

Figure Title
GENERAL SYSTEM OF 1200 RADAR OUTLINE DRAWING OF M89362 SCANNER UNIT OUTLINE DRAWING OF M89361 DISPLAY UNIT BLOCK DIAGRAM OF 1200 RADAR INTERCONNECTIONS OF 1200 RADAR POWER SUPPLY DIAGRAM OF 1200 RADAR CIRCUIT DRAWING OF M89362 SCANNER UNIT INTERNAL CONNECTION OF M89361 DISPLAY UNIT CIRCUIT DRAWING OF MAIN CONTROL PCB BUILT-IN DISPLA Y UNIT CIRCUIT DRAWING OF CONTROL PANEL PCB BUILT-IN DISPLAY UNIT CIRCUIT DRAWING OF DISPLAY ASSEMBLY BUILT-IN DISPLAY UNIT CIRCUIT DRAWING OF POWER SUPPLY PCB BUILT-IN DISPLA Y UNIT ASSEMBLY DRAWING OF M89362 SCANNER UNIT ASSEMBLY DRAWING OF M89361 DISPLAY UNIT

110 III 114

SECTION

GENERAL DESCRIPTION

1.1 INTRODUCTION
Congratulations on selecting the Raytheon Model 1200 Mariners Pathfinder Radar for your radar navigation needs. Whether you purchased this radar because of its compactness or power economy, ease of installation, or long term reliability, one thing is certain; the moment you turn on your 1200 you'll know you're seeing a revolutionary new concept in radar technology at work. Radar signals are "stored" on a 9-inch diagonal TV-type picture with chart like clarity and detail. A single glance at your Model 1200 Display will give you a complete and accurate radar picture of other vessels, bouys and land fall surrounding your vessel. A unique feature even allows you to "freeze" the picture for high accuracy bearing and range measurements. With "one touch" range selection, recessable controls, and "Interference Rejection", (a feature found only on bigger-radar systems) it should become apparent that human engineering and operational simplicity have been considered foremost in the 1200's design. We trust that you will enjoy many years of excellent performance, reliability, and smooth sailing with your new 1200 Radar.

In ON position, (with the READY light glowing) the system is transmitting, and any echoes from targets received are amplified and displayed on your screen.

2) RANGE

The seven RANGE switches select the scale which you wish the radar to display. The range selected automatically determines the proper number and calibrated distance between the range rings and the proper transmission pulse length as shown in Table 2-1.

TABLE 2-1

RELATION OF RANGE, RINGS AND PULSE LENGTH
Range Rings Interval (nml Pulse Length

Number of Rings

0.25 0.5 I I 8 12
0.125 0.25 0.25 0.5 I 2 3
0.12 0.12 0.12 0.12 0.5 0.5 0.5
The TUNE control allows you to maximize target echoes by "fine" tuning of the local oscillator which is located in the Scanner Unit.
The GAIN control varies the amplification in the receiver, and thus the strength of echoes as they will appear on the screen.

SEA CLUTTER

The SEA CLUTTER control reduces the gain level at short range only.

RAIN CLUTTER

The primary use of RAIN CLUTTER is to break up the returns from rain or snow thus allowing weaker targets to become visible. 7)
SHM MARKERS (SHM, MARKERS - SHM - MARKERS - OFF)
The SHM MARKERS switch is a four position switch which selects the SHM, markers, both or none for the display.

CRT BRIL

The CRT BRI LLiANCE controls 4 levels of the screen brightness.
The IR switch turns the interference rejecter "on" to eliminate interference from other ship radars. 10) HOLD The HOLD switch is used to temporarily "freeze" the picture on the screen to assist the operator in determining bearing and ranges. Pushing the HOLD switch stops the transmission of RF power releasing the switch restores normal operation.
2.1.3 Operating Procedure
TO SWITCH ON To switch on the radar, proceed as follows: 1) 2) 3) 4) 5) 6) 7) Set the OPERATE switch to STBY. After READY light glows (approximately 90 seconds), set the OPERATE switch to ON. Set the CRT BRI LLiANCE switch so as to obtain desired brightness of the screen. Set''range scale to the 4, 8 or 12 mile range. Assure that RAIN CLUTTER, the IR switch, and SEA CLUTTER are OFF. Adjust GAIN control to produce a light background speckle screen. Adjust TUNING control for maximum echoes on the screen. If there is no target available (that is, in the open sea) adjust TUNING for the maximum strength of sea clutter. Push RANGE switch of the scale you wish to cover.

2.3.3 SEA CLUTTER Control
Whereas the GAIN control affects the strength of echoes at all ranges, the effect of SEA CLUTTER control is greatest on short-range echoes, becoming progressively less as range increases. The SEA CLUTTER control is only effective up to a maximum of about three miles. In particular, the SEA CLUTTER control reduces the strength of the mass of random signals received from waves at short range. The setting used should be sufficient to reduce the strength of signals until clutter appears only as small dots, and until small targets can be distinguished, the setting should never be advanced so far as to blank out all clutter. The sensitivity of the SEA CLUTTER control is fully variable, thus enabling an optimum picture to be obtained under adverse weather conditions. Maximum reduction in the strength of close-range echoes takes place when the control is turned fully clockwise. When it is turned counterclockwise there is no reduction in the strength of echoes. The SEA CLUTTER control may be used to reduce some rain or snow clutter, as well as strong sea clutter, in the immediate vicinity of the vessel. A temporary increase in the setting will usually permit strong echoes from ships, and most navigational marks inside storms or squalls, to be distinguished. At close range in crowded regions the control may be temporarily advanced to clear the picture. This should be done with care, so as to avoid missing important echoes.
The SEA CLUTTER control should be always returned to its optimum position after any temporary alteration.
2.3.4 RAIN CLUTTER Switch
During heavy rain or snow which may clutter the picture, use RAIN CLUTTER to give better contrast between echoes and the clutter. Under some conditions of sea return, both RAIN CLUTTER and SEA CLUTTER will help to clarify the picture. When viewing large masses of land, coastlines, etc. RAIN CLUTTER reduces the background and will cause promontories to stand out more clearly.

2.3.5 IR Switch

When another ship radar is using the same frequency band as that of your own interference typically appears arranged in curved spokes as shown in Figure 2-3. The radar interference is mainly noticeable on longer range scales. Using the IR switch will eliminate this form of interference as well as any other form of a synchronous noise.

"- -,

":::- >,. x

\" \

"\

FIG. 2-3

RADAR INTERFERENCE
2.4 NAVIGATION WITH THE RADAR

SCANNER

PARTIAL SHADOW
2701------+-=~ - + - - - - , l - - 1..

BLIND SECTOR

FIG. 2-10

SHADOWS

MAINTENANCE

3.1 GENERAL

Continuing satisfactory operation of the radar can depend on how well you care for your equipment. The simple maintenance tips that follow can save you time, and money and help avoid premature equipment failure. CAUTION When working on the radar, make sure that the main switch which supplies power to the radar is open. As an additional precaution, keep the IOPERATE switch on the Display Unit in the OFF position.
Keep the equipment as clean as possible. Use a soft cloth to remove dirt, dust, waterspray as it appears. Periodic inspection of the radar systems should include the following: a. b. c. Check all hardware for tightness. Check for evidence of any corrosion of the scanner, display or cables and clean as required. Check cables and terminal connections for cleanliness, tightness, and freedom from chafing or abrasions.

3.2 SCANNER UNIT

Set the safety switch (S I0 I) of the Scanner Unit to OFF before working on the radar.

3.2.1 Radome

Wipe the surface of the Radome with a clean, soft cloth. Check that there is no paint, dirt or caked salt. A heavy deposit of dirt or caked salt on a painted surface of upper Radome will cause a considerable drop in the radar performance. Don't use any chemical cleaners except alcohol.

3.2.2 Lubrication

Locate main drive gear, clean away old lubrication residue and dirt. Using a spatula, apply a light coating of grease (MOBILUX Grease No.2 Mobil Oil Company or equivalent) on the gear of the main shaft and the drive motor. Lubrication should be done every six months.

GEAR of MAIN SHAFT

,GEAR of DRIVE MOTOR

3.2.3 Mounting

Check the mounting bolts of the Scanner Unit and tighten if necessary.

DISPLAY UNIT

3.3.1 Cleaning the Screen
The face of screen filter and cathode-ray tube will, in time, accumulate a film of contaminants which tends to dim the picture. Be sure ]OPERATE switch is OFF. Remove the front panel. Removing Front Panel Procedure: Remove 4 screws retaining top and bottom covers. Remove 4 screws securing front panel to display. Lay Front Panel forward gently for clearing of CRT face.
3.3.2 High Volt~ge Circuit
Clean the printed CRT display circuit board components and CRT anode with a dry, soft cloth or a clean, soft brush. A coating of dust can cause voltage breakdown, in the circuit and malfunction of the radar.

REMOVE 4 SCREWS RETAINING TOP AND BOTTOM COVER

4 SCREWS

REMOVE 4 SCREWS SECURING THE FRONT PANEL

INSTALLATION

".

4.1 PLANNING

The layout for installing the 1200 Radar should be planned to give the best operation and 'service aboard your particular ship. In general, the Scanner Unit should be mounted atop the wheelhouse or bridge as high as possible. The Display Unit should be installed in the wheelhouse at a convenient viewing position. A 10 meter length of Vinyl-covered, shielded, 11 conductor cable is furnished for interconnecting the two main units (Scanner and Display). This length of cable should be sufficient to fabricate the cable runs required on most small ships: additional cable may be ordered from RAYTHEON. The maximum length cable from the Scanner Unit to the Display Unit should not exceed 20 meters. Figure 101 shows the General System drawing for the 1200 Radar.
4.2 INSTALLATION OF SCANNER UNIT
4.2.1 Selecting the location
Selecting an adequate location for the Scanner Unit requires careful consideration. On many small ships, the unit can be installed directly on the top deck of the wheelhouse near the ship's centerline. The unit should be mounted as high as possible on the ship to ensure best performance at the maximum range. (Refer to para 2.4.3) The scanning beam should not be obstructed by nearby large objects. Locate the unit where large structures such as superstructures or serchlights, or horns, masts are not in the same horizontal plane, otherwise, blind areas and false targets can appear on the radar screen. Installation near the top of a stack must be avoided as damage could result due to excessive heat and the corrosive effects of stack gases.
4.2.2 Mounting the Scanner Unit
Using the outline drawing of Figure 102 as a guide, install the Scanner Unit and secure to the mounting surface. The mounting surface for the Scanner Unit should be parallel with the ship's waterline, and the unit must be turned with the cable inlet astern (safety switch aft). If mounting directly to a top deck does not given sufficient height or clearance, a radar mast or pedestal may be used to raise the unit.
4.2.3 Connecting the Cable
The cable entrance is provided in the base of the Scanner Unit. If the unit is mounted on a hollow mast, the cable may be run inside the mast and through the center entrance hole. Connect the cable leads onto terminal board TB 101 as shown in below. Terminal lugs are provided in the Scanner Unit. Fig. 4-1 details the connecting procedure for the Scanner Unit.

The Circuit Tester for tuning above mentioned is required its internal resistance more than lOkD./V. There may be more than one peak reading. The proper peak is the first peak observed when turning the AD] Screw CW from full CWo

LOCK NUT

MECHANICAL KNOB
ADJUSTING THE MECHANICAL KNOB WITH TUNING METER
Fig. 5-1 GUNN OSCILLA TOR TUNING
Beam centering adjustment on the CRT (See Fig. 5-2) a. b. Remove the cover from the Display Unit Loosen the locking screw on centering magnet and rotate the two knobs simultaneously or individually so that the beam center coincides with the center of cursor line. After adjustment, tighten the locking screw of centering magnet.
A parmanent magnet, is mounted behind the deflection coil and consists of two doughnut shaped plates.
Intensity adjustment a. b. c. Remove the cover from the Display Unit. BRIL push highest position. Adjust RV4 (INTENSITY ADJ) so that PPI is suitable brightness.
Focus adjustment a. b. Remove the cover from the Display Unit. Adjust VR203 (Display Sub PCB) so that the sweep line, rings and targets on the screen are as small and clear as possible.
Comparator level Adjustment a. b. c. Remove the cover from the Display Unit. Rotate the GAIN control fully clockwise. Adjust RV2 (PC40 1) until some back ground speckle is present on the screen.
Display Assembly adjustment 6-1) H-Hold a) b) c) d) Disconnect the signal connector (for VSY, HSY and VD). Loose couple frequency counter to L571(D.Y)-1. Adjust VR501 so that frequency is 15.625 kHz. Connect the signal connector.
6-2) V-Hold Adjust VR401 so that vertical screen is kept in sync. 6-3) H-Width
Set RANGE switch at 12 nm. Adjust L502 so that the fourth marker is 1/16" from the CRT edge.
6-4) V-HEIGHT and V-LIN a) b) Set RANGE switch at 12 nm. Adjust VR402 and VR403 so that the marker is round.
6-5) CRT BIAS a) b) c) 7) Rotate VR201 (contrast) fully counterclockwise. Adjust VR502 so that the raster on the screen is dimly seen. Caution: VR502 carefully to avoid CRT damage. Rotate VR201 ADJ clockwise for best contrast.
Panel dimmer Adjustment Adjust RV401 so that the switch panel is suitable brightness.

BLOCK DIAGRAM DESCRIPTION General Scanner Unit Display Unit

6.2 6.2.1 6.2.2 6.2.3

SCANNER UNIT Radiator, Motor-encoder, Radiator Rotating Mechanism, SHM Sw. Transmitter Receiver

6.3 6.3.1 6.3.2

DISPLAY UNIT General Main Control Circuits
6.1 BLOCK DIAGRAM DESCRIPTION

6.1.1 General

The overall system block diagram can be considered as being comprised of two main sections. One for the scanner unit circuit diagram; the other for the display unit circuit diagram. The following description of the block diagram explains the individual circuits described in Chapter 6.2 and 6.3. The motor-encoder and SHM pulse generator are used to synchronize; the bearing of the radar display, display timing and transmit-triggering. Setting the operate switch to "STBY" position activates the power supply which in tum provides operating voltages to all circuits of the radar. After about 90 seconds, setting the operate switch to "ON" position allows transmitter triggering and the radar becomes operational.

6.1.2 Scanner Unit

The scanner unit includes the scanner drive mechanism together with the transmitter and receiver. These three sections are housed within a 25" radome. 1) Radiator The radiator is a horizontally polarized, resonant, center-fed slotted wave guide array. The radiator is driven at 27 rpm by a motor-encoder via a reduction mechanism. 2) Motor-encoder The scanner motor is a dc motor which incorporates a reduction mechanism and encoder. The input voltage of the motor is 12 V de. The concoder generates a bearing sync pluse every 0.176 degree or 2048 pulses for each complete rotation or the scanner. 3) SHM Pulse Generator The SHM pulse generator consists of a reed switch and permanent magnet which is mounted on the main reduction gear. The SHM pulse resets the bearing counter in the display unit to zero. 4) Modulator A line-type pulser is used in the modulator. The charging method used is de charging. A silicon controlled rectifier (SCR) is used as the high power switch of the pulser. The pulse selection relay (K20 1) is controlled by the RANGE switching on the control panel of the display unit. This will provide short pulses when the 0.25, 0.5, I or 2 nm range switches are selected and long pulses on the 4, 8 or 12 nm ranges. The pulse repetition frequency (PRF) rate is 920 Hz. 5) Magnetron Transmitter A voltage of the required pulse width is fed to the magnetron which generates high energy oscillations in the region of 9445 MHz for the duration of the input pulse. The operating point of magnetron is at a voltage of -3.6KV and a current of 3A.

Circulator and Diode Limiter A ferrite circulator is used for the duplexer. The Passive Diode Limiter is used to protect the receiving section (especially the mixer diodes). From excessive RF input levels at all times.
Gunn Oscillator A Gunn Oscillator is used for the local oscillator. The oscillator generates a low energy RF signal the frequency of which is tuned 38 MHz higher than that of the transmitter output frequency.

""

Mixer Two small diodes, fitted inside the mixer waveguide assembly at the, receiver input, form a balanced mixer which feeds the intermediate 38 MHz frequency signal to the 1.F. amplifier.

1.F. Amplifier

The 1.F. amplifier consists of two stages. The first stage is a low noise transistor amplifier; the second is a linear integrated circuit amplifier stage. The second stage is controlled by the GAIN-SEA CLUTTER signal from the display unit. 10) Detector In this stage, the 1. F. (38 MHz) component is removed leaving video rate signals for display. 11) Video Circuit This circut is primarily an emitter follower which feeds the video signal from the detector to the display unit providing an impedance match to the coaxial cable. At the same time this emitter follower supplies the video integrator circuit used for tuning of the Gunn Oscillator.

6.1.3 Display Unit

The display unit consists of the main control circuits, the control panel circuitry, the CRT display and the power supply. The display unit is fed with the video and bearing synchronizing signals from the scanner unit via a multicore cable. Semi-conductors and integrated circuits are used throughout the display except for the CRT and lamps. 1) Video Circuit The video circuit consists of the FTC (Rain-Clutter) circuit, inverting amplifier, D.C. restorer circuit, emitter follower and tuning indicator circuit. 2) Comparator The comparator generates a digital pulse train from the input analog video signal. Comparator level adjust RV402, sets the video threshold. 3) Pulse Stretch The pulse stretch circuit expands the width of the digital video pulses, according to the range scale selected.
Buffer Memory The buffer memory stores the video data of 3 successive transmissions. A single transmission of video data is stored into 112 memory cells.
Interference Rejecter The stored transmissions of video data from the buffer memory is serially fed into the interference rejector. Interference in the video data will be rejected using pulse correllation techniques.

29) Vertical Counter The vertical counter consists of ICSS, S6 and ICS4-3, 6 and produces nine bits Y address data at display time. ICS4-3, 6 set the vertical counter to 1/26 divider. 30) Horizontal and Vertical Synchronizing Pulse Generator ICS7-14 produces the horizontal synchronizing pulse from the outputs of the horizontal counter. ICS7-14 output is inverted by IC49-10 and IC49-10 output is fed to the CRT display. ICS8-9 produces the vertical synchronizing pulse from the outputs of the vertical counter. ICS8-9 output is inverted by IC49-8 and IC49-8 output is fed to the CRT display. ICS9 produces the horizontal blanking pulse on ICS9-4, the video RAM writing pulse on ICS9-7, the vertical blanking pulse on ICS9-9, and the SHM gate pulse on ICS9-13. 31) SHM Generator
ICSO, Sl produce the SHM line on the CRT screen. The SHM will be generated ; when the proper XY address and unblanking signals are present at the input to ICSI Pins 3 and 4.
32) 90-Second Timer IC33-6 changes 0 to 1 after approximately 90 seconds from setting the OPERATE switch to STBY. At the same time, the READY lamp (CD401) glows. 33) SHM Mixing, Blanking Gate The video pulse is fed to IC63-S and the SHM pulse is fed to IC63-4. Mixed output appears on IC63-6 and is gated by the blanking gate IC64-6 and IC64-3. 34) Video Buffer IC64-6 output pulse amplitude is controlled by IC64-8 and IC64-11 and fed to TR13 emitter follower. TR13-E output is fed to the CRT display via the intensity adjust RV4. 3S) Display PCB The display printed circuit board contains the vertical deflection circuit IC40 1, the horizontal deflection circuit QSO I, IC40 1, QS02, QS03 the blanking circuit Q401, Q402 and the power supply circuit TS02, DS03, DS06, DS04. IC40 I operates as the vertical oscillator, the vertical deflection coil driver, and the horizontal oscillator. IC40 1-9 output is fed to the horizontal driver QS02 and QS02-C output is fed to the horizontal output QS03 via TSO 1. QS03-C drives the horizontal deflection coil and the flyback transformer TS02. The horizontal and vertical blanking pulses are mixed and amplified by Q401 and Q402. Q402-C output is fed to the video AMP Q20S-E in the video PCB. 36) Video PCB The video amplifier Q20S and Q206 form a cascade connected amplifier to amplify the video signals of the video buffer output. Q206-C output is fed to the CRT cathode.

Therefore, the supply voltage is given by the time average of the output voltage,

Esw = E2

Supply Voltage = E1

----~-

- - _ Ton _ _-I

FIG. 6-11

ACROSS VOLTAGE OF THE TRANSISTOR SWITCH
Consequently, the output voltage is described in the following equation: Ton + Toff Toff
The constant output voltage is obtained by the same manner as for step down operation.
Converter TR2 and TR3 are the transistor switches, and the complementary squarewaves are fed to TR2-B and TR3-B. The 3000 Hz squarewave appears on the primary windings of T401. The secondary outputs of Tare fed to the rectifier circuits.
(D) Control Circuit IC2 drives the converter TR2, TR3 and AVR control TR3. The switching frequency is determined by C8 and R16. The 3000 Hz squarewave is superimposed on the reference voltage of IC1-6. This reference voltage is fed to IC1-5 and 'the output voltage is fed to ICl-4 via the AVR ADJ RV1. These two voltages are compared in ICl: the output pulse appears on ICl-9. This output pulse controls the transistor switch via two stage drivers. The regulated output is adjusted to l7V by RV1. (E) Rectifier Circuits The +330V, +12V, +5V, -5V are produced in this circuit and fed to display unit and scanner unit. (F) HV Protection Circuit This circuit is provided to prevent a short circuit of the power supply when the SCR (Modulator circuit) is continuously held in a conductive condition. IC3-2 triggers on a negative-going signal when HV voltage (+330V) reaches +170V (voltage of IC3-2 reaches +4V). Once triggered, the IC3-3 is held +12V until the set time has elapsed. The duration of the set time is given by T = 1.1 x (R22) x (C14) and is about 1 sec. As a result, Kl is OFF and the power supply circuit and the modulator circuit are separated.

PARTS LIST

7.1 ELECTRICAL PARTS LIST 7.2 MECHANICAL PARTS LOCATION LIST
1200 SCANNER UNIT TYPE M89362
MAIN CHASSIS TYPE REF. A101 A102 C101 C102 M101 MIl01 P201 P301 PS201 PS301 PT201 PT301 R101 S101 S102 TB1 TYPE H-6AJRDOOOOI NJS6918 ECE-B1ES102 ECQ-V051 03JC MP.EM00133A SR-1 FM4.9 x 4.9 x 6 PCN6-lOS-2.5C PCN6-lOS-2.5C PCN6-LOCK(D) PCN6-LOCK(D) PCN6-2226CF PCN6-2226CF ERX-2ANJ4R7 S-116 Type; RS-1, NO KH4105-20P DESCRIPTION CIRCULATOR DIODE LIMITER

25VlOOO~F

cac -177
JRC PIN 6AJRDOOOOI 5EZAA00005 5CEAA01409 5CRAA00337 MPEM00133A 5MPABOOOOI 5JDAA00154 5JDAA00154 5JDAA00170 5JDAA2911101001 5REAG00049 5SAABOOOO2 5SJAC00003 5JTDK00003 RAYTHEON PIN 984929-145
984929-142 984929-142 984929-231 984929-231

4.7 OHM

587922-2
TRANSMITTER CHASSIS TYPE CNM - 70 REF. V201 TYPE M1315 DESCRIPTION MAGNETRON JRC PIN 5VMAA00023 RAYTHEON PIN 981957-12
MODULATOR PCB ASSEMBLY (PC201) TYPE CNM -71 REF. C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 COl CO2 CD3 CD4 CD5 CD6 CD7 CD8 CDS3 TYPE DD31-2B472K500V02 ECQ-V054 73JC ECE-A1 CS470 ECW-H6H153JC ECW-H6H153JC ECW-H6H153JC ECQ-V05104JC ECE-A1CS470 ECE-A1CS470 ECQ-V051 04JC DD31-2B472K500V02 lS1832

DESCRIPTION 500V 4700PF

0.015~F 0.015~F 0.D15~F
50V O.1~F 16V 47~F 16V 47~F 50V O.1~F 500V 4700PF 800V 2.5A 800V 2.5A

S6080B U05J V06C lS1588

800V 2.5A

HVR-3H HS-UC-45-24-AN-0

JRC PIN 5CBAB00406 5CRAA00336 5CEAA01342 5CRAAOO085 5CRAAOO085 5CRAAOO085 5CRAA00334 5CEAA01342 5CEAA01342 5CRAA00334 5CBAB00406 5TXADOO173 5TXAEOO069 5TZAD00201 5TXAEOO069 5TXAEOOO16 5TXADO0040 5TXAEOO069 5TXANOO056 5ZKAFOOO17

RAYTHEON PIN

981957-4 981957-4 981957-4
587922-209 587922-8 587922-8 587922-55 587922-8
REF. 1201 K1 Ll L2 L3 L4 PC201 R1 R2 R3 R4 RS R6 R7 R8 R9 II TR1
TYPE PCN6-10PA-2.5DS Type; RL, DC12V H-6LZRDOO04S EJOO-6LCRDOOO 10 H-6LCRDOOO08 H-6LCRDOOO 18A H-6PCRDOOS34 ERD-2SPJ100 ERD-2SPJ102 ERD-2SPJ471 'ERG-1ANJ470 ERD-2SPJ100 ERX-2ANJ4R7 ERX-2ANJ4R7 ERX-2ANJ3R9 ERG-2ANJ470 H-6 LPRD00041A 2SC1212AB

DESCRIPTION

CHOKE COIL
1/4W 1/4W 1/4W 1W 1/4W 2W 2W 2W
10 OHM 1KOHM 470 OHM 47 OHM 10 OHM 4.7 OHM 4.7 OHM 47 OHM
JRC PIN SJDAAOO06S SKLAPOOO04 6LZRDOO04S 6LCRDOOO10 6LCRDOOO08 6LCRDOOO18 6PCRDOOS34 SRDAAOl178 SRDAAOl181 SRDAA011SS SREAG001S1 SRDAAOl178 SREAGOO049 SREAGOO049 SREAG00903 5REAGO6LPRDOO041 STCAAOO137
981957-6 981957-7 981957-8 981957-9 1037139-4

981957-11 587922-208

RECEIVER CHASSIS TYPE CGH - 75 REF, A301 C0301 C0302 P2 P3 P4 PS P6 RC301 TYPE NJS7901B 1N23E 1N23ER 60789-2 60789-2 60789-2 60789-2 60789-2 H-6ATRDOOOOSA DESCRIPTION GUNN OSc. JRC PIN SENAC00018 STXAJ00009 STXAJ00010 5JWAH00086 SJWAH00086 SJWAH00086 SJWAH00086 SJWAH00086 6ATRDOOOOS RAYTHEON PIN 981957-13 322-1001P6 322-1001P7

981957-90

RECEIVER PCB ASSEMBLY (PC301) TYPE CAE - 160 REF. C1 C2 C3 C4 CS C6 C7 C8 C9 ClO C11 C12 C13 C14 CIS TYPE DD106B222KSOV02 DD106B222KSOV02 DD106B222KSOV02 ECQ-VOS1 03JC ECQ-VOS103JC DD106B222KSOV02 DOl OSSLl011SOV02 DD106B222KSOV02 DD106B222KSOV02 DD106B222KSOV02 ECE-A1CS330 DOl 04SL220JSOV02 DD106B222KSOV02 DD106B222KSOV02 DOl 06B222KSOV02 DESCRIPTION SOV 2200PF SOV 2200PF SOV 2200PF JRC PIN SCBAB00303 SCBAB00303 SCBAB00303 SCRAA00337 SCRAA00337 SCBAB00303 SCAAA01101 SCBAB00303 SCBAB00303 SCBAB00303 SCEAA01340 SCAAA01093 SCBAB00303 SCBAB00303 SCBAB00303 RAYTHEON PIN 1033012-93 1033012-93 1033012-93
SOV SOV SOV SOV SOV 16V SOV SOV SOV SOV
2200PF 100PF 2200PF 2200PF 2200PF 33j1F 22PF 2200PF 2200PF 2200PF
1033012-93 1033012-93 1033012-93 1033012-93
1033012-93 1033012-93 1033012-93
REF. C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28
CD4 CDS CD6 CD7 CD8 CD9 CDlO CDlI CD12 CVl ICI IC1301 Ll L2 L3
L5 L6 PC301 Rl R2 R3 R4 R5 R6 R7 R8 R9 RIO Rll R12 R13 R14 R15 R17 R18 R19
TYPE ECE-AICS330 DD104SL2201 50V02 DD106B222K50V02 DD106B222K50V02 ECE-AICS330 DDI06B222K50V02 ECE-AICS330 ECE-AIESI00 ECQ-V051031C ECE-AICS221 ECE-AIES100 DDl 06B222K50V02 DD106B222K50V02 lS1588 lS1588 lS1588 IS1588 IS1588 lK34A V06C V06C V06C V06C ECV-1 ZW20X53N TA7124P UPC596C 171255-1 171255-1 171255-1 171255-1 171255-1 PCN6-10PA-2.5DS LF4-8R2K LF4-8R2K SP0408-R68K SP0406-1 ROK SP0406-1R5K SP0406-2R2K H-6PCRD00533 ERD-25PJ221 ERD-25P1221 ERD-25P1332 ERD-25PJl22 ERD-25P1391 ERD-25P1561 ERD-25PJ220 ERD-25P1220 ERD-25PJl02 ERD-25P1621 ERD-25P1621 ERD-25PJ272 ERD-25PJl82 ERD-25PJ220 ERD-25P1220 ERD-25P1561 ERD-25PJl04 ERD-25PJlOO

5RDAAOl146 5RDAAOl146 5RDAAOl181 5REAG00800 5REAGOO089 5RDAA01257 5REAGOO044 5REAGOO094 5RDAA01265 5RDAA01265 5RDAAOl168 5RDAAOl162 5REAGOO090 5RDAAO 1155 5RDAAO 1155 5RMADOOO12 6LTRDOO110 5TAAGOO046 5TCAAOO137 5TCAF00219
280-1147-P61 280-1147-P55

280-114791

1033012-114 587922-208 1032689-100
INTERUNIT CABLE TYPE CFQ - 1413 REF. TYPE DESCRIPTION JRC P!N RAYTHEON P!N

PI P2 PLl

206060-1 JRC25PG-16S 206062-1 202237-2 202237-2 202237-2 H-2695110006

1612-57

5JWAH00375 5JCAA00265 5JWAH00372 5ZJBH00018 5ZJBH00018 5ZJBH00018 269.5110006
CRT DISPLAY ASSEMBLY TYPE H-6WZRD00002 REF. TYPE DESCRIPTION JRC P!N RAYTHEON P!N
V271 IC401 Q202 Q205 Q206 Q401 Q402 Q501 Q502 Q503 D204 D205 D206 DD402
C935P31 J.LPC1379C 2SC711AG/2SC2603G 2SC710D 2SC22290Y 2SC711AG/2SC2603G 2SC1214C/2SC2274E 2SC711AG/2SC2603G 2SC1214C/2SC2274E 2SD823HP lS2076A/1S2471 S5500D/EM-1Z/ERB12-02RK MZ-424-2A MZ-424-2A lS2076A/lS2471 S5500D/EM-IZ/ERB12-02RK
REF. 0403 D501 D502 D503 D504 D506 T502 L502 L503 L571 VR201 VR202 VR203 VR401 VR402 VR403 VR502 C514
TYPE 1S2076A/IS2471 RU-3A RU-3A RH-1C TVR-1G/ES-1 RH-IC 334PlO401 335P00501 333P01301 330P08402 B-200 B-5K
B-IOK B-500 B-500 B-500K 25V 7M, BP
MECHANICAL PARTS LOCATION LIST
Reference to Fig. 113 Assembly Drawing of M89362 Scanner Unit
Description Radome Assy Containing of No.2 Nut, Special Radome Radiator Assy Plate Gear Ring, Retaining Bearing Plate Shaft - 'Sems Screw M4 x 12 Brass Screw M4 x 35 Brass Washer, Spring M4 SUS304 Washer, Plain M4 Brass Chassis Chassis Chassis Circulater H-6AJ RD00001 Diode Limiter NJS6918 Waveguide, Connection Waveguide, Connection Coaxial Rod Screw M4 x 60 Brass Sems Screw M5 x 16 Brass Chassis Receiver Unit Assy Consisting of Cristal Diode 1N23E Cristal Diode 1N23E R Plate, Spring Rubber, Clamp Cristal Cap Screw, Special Cover Plate, Threaded Sems Screw M3 x 8 Brass RCV PCB Assy _ Gunn Oscillator ~NJSj901 B-~\ Plate ---------. ---Modulator Unit Assy

Symbol

JRC PIN MPBXl1642

A 101 A102

'--.,31 32
MTL027485 MTV002211 MPAE00401 MTB049799A MTT015965 SR I G0l134 BRGK00072 MTB103571 MTH003646 \.C C BSNC04012B BSNK04035B BSSW04000S BSFW04000B MTB106330A MTB106331A MTB106332A 1033012-114 6AJRD00001 5EZAA00005 MTM002254 MPAB01237 MTL023552 BRTG01248 BSNC05016B MTB106337A MDEM0059~_

:""CC;-~, --

CD301 CD302

PC301 A301

5TXAJ00009\.322-1001P6 5TXAJ00010 )322-1001P7 MTD002186 J MTT006882 MTC000606 MTL005890 MTBl12493A MTB115068 BSNC03008B CAE-160 5ENAC00018 MTB106339A MDMW01075

Location 58 59

Description Chassis Chassis Chassis Cover Modulator PCB Assy G. c., ") Magnetron M1315 Motor Nut M4 Steel Plate SHM Switch RS-l Toggle Switch Sl16 Switch Cover Terminal Screw M4 x 16 Steel Screw M5 x 10 Steel Packing Bolt, Special Seal Washer O-Ring Magnet SR-l FM4.9 x 4.9 x 6
JRC PIN MTB106333A MTB106334 MTB106335

PC201 V201 Ml0l

S102 S101 TB10l
MTB106336 CMN-71 5VMAAOO023 MPEMOO133A BSHN04000S MTB103573A 00003 5SAABOOO02 BRPKOO171 5JTDKOOO03 BRTG02546 BRTG02544 MTT016990A MTL027493 BRTG02490 BRPK00109 5MPABOOOOl

984929-118

Reference to Fig. 114 Assembly Drawing of M89361 Display Unit

Location 5 6

Description Front Bezel Cover Hood Assy Consisting of Screw, Special Washer, Spring M4 Base Assy Consisting of Rubber Plate Spacer Knob Washer, Special Filter Cursor Cover Plate, Retaining Sems Screw M3 x 8 Brass Shield Paper CRT with D.Y, Shield Spring PCB PCB Washer, Special Sems Screw M4 x 10 Brass Plate, Retaining Switch Switch Cover Resistor, Variable Switch, Push Button Switch Cover Knob Spring, Clamp Control Panel Assy Consisting of Panel Switch Control Panel PCB Assy Spacer Sems Screw M3 x 18 Brass Chassis Consisting of Chassis Chassis Plate, Retaining Plate, Retaining

1:~ ~j.:

.:. ~L'"
JRC PIN - MPWM00676B MTV002214 MPOL00651 MTL027483 BSSW04000S MPBC05221
MTT017935 MTV002215 MPHD00618 MTD003324A '. MTT017024A MPDA01946B MTV002218A MTD003415A BSNC03008B MTZ001978 CCJ-55

RV401~403

CKJ-45 CKJ-44 MTD003426 BSNA04010B MTB109453B 5SAAB00370 MTV002222A 5SCAAOO084 MTV002221A MPHD00984 BRSROOO77 'fVj6'G'WOO804---
";"'-~' -cc l'~ -''')CL S451 6SWRDOOO01 PC402 CCK-362 MTT006277 BRTG02750 MPBC05185
MTBl15165 MTB115166 MTB109477A MTB109478A

Location 65 66

Description Chassis Plate, Retaining Cover Chassis Chassis Cover Shield Spring Main Control PCB Assy Spacer Packing Packing Cover Cover Spacer Charging Choke Coil Power Supply Unit Assy Consisting of Chassis Power Supply PCB Assy Cover Spacer Radiator PCB Connector 206061-1 Connector JRC25RG-16P Cover Fuse Holder S-N1301