MDC-900_SME_1004[1]

MDC-900Series Revision History

0093842132-02 i

MDC-900 series Service Manual Doc No. 0093842132

Document Revision History No. Doc. No - Rev. No. Date Revised

(Y/M/D)

Revised Content

0 0093842132-00 2008/10/08 First edition

1 0093842132-01 2009/08/25 Full revision

2 0093842132-02 2010/01/05 Full revision

3

4

5

6

7

8

9

10

Document No. Revised Version Norm When part of the document needs to be revised, the document has advanced revision number.

The document No. is indicated at the lower right side on the cover and at the left or right side of the

footer region of each page.

© 2009-2010 Koden Electronics Co., Ltd. All rights reserved.

No part of this publication may be reproduced, transmitted, translated in any from by any means without

the written permission of Koden Electronics Co., Ltd. The technical descriptions contained in this

publication are subject to change without notice. Koden assumes no responsibility for any errors,

incidentals or consequential damages caused by misinterpretation of the descriptions contained in this

publication.

Important Notice MDC-900 Series

ii 0093842132-02

Important Notice

• The re-use and transcription of Service Manual (hereafter called this manual) needs permission of our company. Our company prohibits the un-authorized re-use and transcription.

• If this manual is lost or damaged, consult our dealer or our company.

• The specification of our products and the content in this manual are subject to changed without notice.

• In the explanation of this manual, the content displayed on the menu of product may be different, depending on the situation.The keys and menus in the illustration may differ in physical font and shape. And some parts may be omitted.

• Our company is not liable for damage and trouble arising from misunderstanding of the content described in this manual.

• Our company is not liable for earthquake, lightning, fire for which our company is not responsible, action by third party, other accident, customer’s unintended error/abuse and damage caused by the use under other abnormal condition.

• Our company is not liable for damage of accompaniment (change/loss of memorized content, loss of business profit, stop of business) arising from use or failure of our product.

• If the stored data is changed or lost, irrespective of any cause of trouble and damage, our company is not liable for it.

• Our company is not liable for any damage arising from malfunction caused by combination of such software and connected equipment that did not involve our company.

MDC-900 Series For Your Safe Operation

0093842132-02 iii

For Your Safe Operation Symbol used in this Manual

This manual uses the following symbols. Understand the meaning of each symbol and implement

the maintenance and inspection.

Symbol Meaning

Mark for warning This symbol denotes that there is a risk of death or serious injury when not dealing with it correctly.

Mark for danger high voltage This symbol denotes that there is a risk of death or serious injury caused by electric shock when not dealing with it correctly.

Mark for caution This symbol denotes that there is a risk of slight injury or damage of device when not dealing with it correctly.

Mark for prohibition This symbol denotes prohibition of the specified conduct. Description of the prohibition is displayed near the mark.

Caution Item on Equipment

Caution on a high voltage inside A high voltage, which may risk your life, is used. This high voltage remains in the circuit after you have powered off switch. To prevent touching the high voltage circuit inadvertently, the protective cover is provided to the high voltage circuit and the high voltage caution label is affixed. Ensure to power off switch for your safety and discharge the electricity remaining in the capacitor before starting to check. An engineer authorized by our company should inspect and maintain the circuit.

Be sure to switch off the power in the boat If the power switch is inadvertently powered on during work, you will be electrified. To prevent such accident from occurring, ensure to switch off the power in the boat and the power of equipment. Furthermore, it is safer to hang the caution tag with description of [Under Work] near the power switch of equipment.

Caution on dust Inhaling dust may cause A respiratory disease. When cleaning the inside of equipment, be careful not to inhale dust. Wearing a safety mask is recommended.

For Your Safe Operation MDC-900 Series

iv 0093842132-02

Caution on location of equipment Do not install the equipment where it is excessively damp and suffers from excessive water drops.

Caution on static electricity The static electricity may be generated from the carpet on the floor in the cabin or clothes made of synthetic fiber. The static electricity may destroy the electronic parts on the circuit board. Handle the circuit board, taking the suitable anti-static measures.

Caution Item on Handling

Caution on the rotating aerial The radar antenna may start to rotate without notice. Please stand clear

from the antenna for your safety.

Caution on electromagnetic disturbance The operating antenna & scanner unit radiates high-energy

electromagnetic wave. It may cause harmful effect for human body due to

its continuous irradiation. As International regulation says,

electromagnetic waves less than 100 watt/m2 does not have a harmful

effect on human bodies, but some kind of medical devices such as heart

pacemakers are sensitive even under the low energy electromagnetic

wave. Any personnel with such a device should keep away from the

electromagnetic wave generating position at all times.

Distance from equipment having a specific power density of electromagnetic wave. (By IEC 60945 regulation)

Model Transmitting power/ Antenna length 100W/m2 10W/m2

MDC-921 2kW/ 1.2 feet (Radome antenna) 0.4ｍ 1.27ｍ

MDC-941 4kW/ 2 feet (Radome antenna) 0.8ｍ 2.54ｍ

4kW/ 3 feet (Open antenna) 0.9ｍ 2.85ｍ MDC-940

4kW/ 4 feet (Open antenna) 1.01ｍ 3.2ｍ

Do not disassemble or modify. It may lead to trouble, fire, smoking or electric shock. In case of trouble, contact our dealer or our company.

In case of smoke or fire, switch off the power in the boat and the power of

equipment. It may cause fire, electric shock or damage.

MDC-900 Series For Your Safe Operation

0093842132-02 v

Caution on the remaining high voltage. A high voltage may remain in the capacitor for several minutes after you have powered off. Before inspecting inside, wait at least 5 minutes after powering off or discharging the remaining electricity in an appropriate manner. Then, start the work.

The information displayed in this unit is not provided directly for your navigation. For your navigation, be sure to see the specified material.

Use the specified fuse. If un-specified fuse is used, it may cause a fire, smoke or damage.

Contents MDC-900 Series

vi 0093842132-02

Contents Document Revision History ............................................................................................................ⅰ

Important Notice .............................................................................................................................ⅱ

For Your Safe Operation ................................................................................................................ⅲ

Contents .........................................................................................................................................ⅵ

Introduction .....................................................................................................................................ⅸ

System Configuration .....................................................................................................................ⅹ

Connetion Diagram .....................................................................................................................ⅹ

Pin Assignment of Rear Connector............................................................................................xⅰ

Configuration of Equipment ··········································································································· xⅱ

Standard Equipment Configuration List ····················································································· xⅱ

Types of Antenna-scanner unit ·································································································· xⅲ

Optional List ······························································································································· xⅲ

MRD-103 (Display unit) External View ...........................................................................................xⅳ

MRD-103 (Display unit) Diagram of installation.........................................................................xⅴ

RB714A (Radome/2kw) External View .....................................................................................xⅶ

RB715A (Radome/4kw) External View .....................................................................................xⅶ

RB716A (Open array/4kw) External View.................................................................................xⅷ

Specifications................................................................................................................................xⅸ

Chapter 1 Function explanation and tests ......... 1-1 1.1 Operational Outline.............................................................................1-1 1.2 Display unit: MRD-103 ........................................................................1-3 1.2.1 Check and Adjustment of Power supply ....................................................................... 1-4

1.3 Antenna-scanner unit: RB-714A (Radome/2kW, MDC-921) .............1-5 1.3.1 Check point and Signal ................................................................................................. 1-6

1.4 Antenna-scanner Unit: RB715A (Radome/4kW, MDC-941)/RB716A (Open array/4kW, MDC-940) ...............................................................1-7

1.4.1 Check point and Signal ................................................................................................. 1-8

Chapter 2 Input/Output......................................... 2-1 2.1 Input data.............................................................................................2-1 2.1.1 Details of data input format ........................................................................................... 2-1

2.1.2 Priority of received data ................................................................................................ 2-5

2.2 Output data ..........................................................................................2-5 2.2.1 Detail of data output format........................................................................................... 2-5

MDC-900 Series Contents

0093842132-02 vii

2.3 Interface specifications...................................................................... 2-6 2.3.1 AIS data input specifications..........................................................................................2-6

2.3.2 Radar signals input/output specifications ......................................................................2-7

2.3.3 NMEA/IEC61162 input/output specifications .................................................................2-7

2.3.4 Signal specifications of external buzzer and monitor.....................................................2-8

2.3.5 CCD camera input signal specifications ........................................................................2-9

2.3.6 Antenna-scanner unit signal specification ...................................................................2-10

Chapter 3 Maintenance......................................... 3-1 3.1 Maintenance and Cleaning ................................................................ 3-1 3.1.1 Monthly Inspection .........................................................................................................3-1

3.1.2 Yearly Inspection ...........................................................................................................3-2

3.2 Fuse Replacement .............................................................................. 3-3 3.3 Consumables ...................................................................................... 3-3

Chapter 4 Trouble shooting ................................. 4-1 4.1 Necessary information at the time of the request to repair ........... 4-1 4.2 Provided self diagnostic facilities ..................................................... 4-1 4.2.1 Error display .................................................................................................................4-1

4.2.2 Self-diagnostic menu .....................................................................................................4-2

4.2.2.1 Display unit.....................................................................................................................4-2

4.2.2.2 Antenna-scanner unit.....................................................................................................4-3

4.2.2.3 Operation panel test.......................................................................................................4-3

4.2.2.4 LCD test .........................................................................................................................4-4

4.2.2.5 Operating hours reset ....................................................................................................4-4

4.2.2.6 TX hours reset................................................................................................................4-4

4.2.2.7 All reset (Initialization)....................................................................................................4-4

4.2.2.8 System program update.................................................................................................4-4

4.2.3 NMEA input signal monitor ............................................................................................4-4

4.3 Trouble Diagnosis .............................................................................. 4-5 4.4 Failure diagnosis flowchart ............................................................... 4-5 4.5 Initialization....................................................................................... 4-19

Chapter 5 Technical references

5.1 Maintenance parts list......................................................................... 5-1 5.1.1 MRD-103 Display unit ....................................................................................................5-1

Contents MDC-900 Series

viii 0093842132-02

5.1.2 RB714A 2kW Antenna-scanner unit (RADOME) .......................................................... 5-1

5.1.3 RB715A 4kW Antenna-scanner unit (RADOME) .......................................................... 5-2

5.1.4 RB716A 4kW Antenna-scanner unit (OPEN ARRAY) .................................................. 5-2

5.2 Exploded view drawings ....................................................................5-3 MRD-103 Exploded view of display unit (E57BG1301*) .............................................................. 5-3

RB714A ANTENNA-SCANNER UNIT EXPLODED VIEW (23W68694*) .................................... 5-4

RB714A TR PART EXPLODED VIEW (23W68695*)................................................................... 5-5

RB715A ANTENNA-SCANNER UNIT EXPLODED VIEW (23W73352* 1/2) .............................. 5-6

RB715A ANTENNA-SCANNER UNIT EXPLODED VIEW (23W73352* 2/2) .............................. 5-7

RB715A/RB716A TR PART EXPLODED VIEW (23W73353*) .................................................... 5-8

RB716A ANTENNA-SCANNER UNIT EXPLODED VIEW (23W73461*) .................................... 5-9

RB716A/717A/717AP/RB718A/718AP/RB718BP/RB719A/719AP/RB719BP

DRIVE UNIT EXPLODED VIEW (E48BG1013*)........................................................................ 5-10

RB716A/RB717A/RB718A SCANNER BOX EXPLODED VIEW (E41BG2001*.1).................... 5-11

5.3 Circuit diagrams................................................................................5-12 MRD-103 DISPLAY UNIT WIRING DIAGRAM (E57CGB010*) ................................................. 5-12

RB714A Inter Connection Diagram of 2kW Radome Unit (E38CGB030*)................................. 5-13

RB715A Inter Connection Diagram of 4kW Radome Unit (E38CGB020*)................................. 5-14

RB716A Inter Connection Diagram of 4kW Open Scanner Unit (E38CGB010*) ....................... 5-15

*Subject to version change

MDC-900 Series Introduction

0093842132-02 ix

Introduction

The main features of KODEN color LCD radar MDC-900 series are as follows.

• The high performance radar equipped with 8.4 inch color TFT LCD display can be used for professional use.

• Since, in the true trail function, moving targets such as other ships are displayed with tail and stationary targets such as land are displayed with fix, the moving targets and fixed targets can be easily distinguished.

• Two screen images with different ranges can be displayed. If you set both short range and long range, you can navigate the ship properly and grasp at the situation.

• The automatic tracking aid (ATA) function is provided. The maximum 50 targets can be tracked. The current movement of other ships can be shown with a vector and numeral value. It helps your safety navigation. (Option)

• By connecting the AIS receiver, the collected information such as name, heading and speed of a ship can be displayed. (AIS interface: Option)

• With the adoption of a specific filter (AR coat), an image can be seen more clearly against direct sunlight. AR coat is also effective to the countermeasure against condensation.

• The RGB output for an external monitor is provided as standard equipment. The use of an external monitor enables you to observe easily the radar screen at a location away from a main unit. (External monitor: Owner supplied)

• A video from a CCD camera can be displayed. Observation of the engine room by CCD camera helps your ship navigate safely. (CCD camera: Owner supplied)

• Easy operation with dedicated control knobs for GAIN and STC.

• Water protection, IPX5 of the display enables the use of the bridge.

• At the time of flush-mounting installation, you can easily fix and remove from front side of the display.

System Configuration MDC-900 Series

x 0093842132-02

System Configuration

Connection Diagram Connect the power cable, antenna cable and other cables for other optional equipment such as navigational equipment, CCD camera, etc to specified connectors at rear display panel. Please connect by referring cable connections shown below.

To J3

To J2

To J1

To J4 To J5 To J7 To J6

receiver AIS

+ GND10.8 to 31.2VDC

Display unit MRD-103

: Standard equipment: Option: Owner supplied

CW-265-2M CW-376-5M

Antenna-scanner

unit

GND

To POWER

Remote display Navigation

equipment Navigationequipment

Externalmonitor

CCDcamera

* Be sure to connect the KGC-1 to J4

CW

-373

/374

/376

-5M

CW

-373

/374

/376

-5M

MDC-900 Series System Configuration

0093842132-02 xi

① +250V ⑨ BP/SHF-R ② +24V ⑩ V/TRIG ③ +12V ⑪ Un-connected ④ GND ⑫ SHIP’S+ ⑤ DAT-R ⑬ SHIP’S+ ⑥ DAT ⑭ V/TRIG-R ⑦ Un-connected ⑮ SHIP’S- ⑧ BP/SHF ⑯ SHIP’S- J5

Pin Assignment of Rear Connector The pin assignment is viewed from the rear of the display unit

AIS Input Remote display

NMEA/IEC61162 Input/Output NMEA/IEC61162 Input/Output

Antenna-scanner unit External monitor/External buzzer

CCD camera Input Power Input

Un-connected AISIN-

① R ② R-GND ③ G ④ G-GND ⑤ B ⑥ B-GND ⑦ H-SYNC ⑧ V-SYNC ⑨ External Buzzer+⑩ External Buzzer-

J6

①②

③④

⑧

⑤

⑦

⑥

⑨

⑩

① Camera1 Input ② Camera1 GND ③ Not-used ④ Not-used ⑤ Not-used ⑥ Not-used ⑦ Not-used J7

②

①

③ ④

⑤

⑥

⑦ ① Power-

② Power+

③ GND

POWER

③①

②

Un-connected

Un-connected

Un-connected

Configuration of Equipment MDC-900 Series

xii 0093842132-02

Configuration of Equipment

Standard Equipment Configuration List No Name of item Type Remarks Weight/Length Quantity1 Display unit

MRD-103 With mounting bracket and knobs

3.7 kg 1

2 Hard cover

E57MB11060 250 g 1

3 DC power cable

CW-265-2M 2 m 1

4 Fuse

F-1065-8A Cylinder (ø6.3x32)

Normal fusion type for main power

1

5 CCD camera cable

CW-405-0.3M 0.3m 1

6 Antenna-scanner unit See next page. With cable 1

7 Operation Manual English 1

8 Quick Reference Guide English 1

MDC-900 Series Configuration of Equipment

0093842132-02 xiii

Types of Antenna-scanner unit No Type Transmitting

Power Shape Remarks Antenna

Weight/Length1 RB714A

2 kW Radome With 10 m cable*

6 kg / 1.2 ft

2 RB715A

4 kW Radome With 10 m cable*

10 kg / 2 ft

21 kg / 3 ft 3 RB716A

4 kW Open With 10 m cable*

22 kg / 4 ft

* Cables of 15 m, 20 m and 30 m are available. (Option)

Optional List No Item Name Type Remarks Cable Length1 GPS compass KGC-1 GPS/Heading measuring ― 2 AIS interface AIS-110 3 Cable for AIS receiver CW-376-5M With 6-pin water resistant

connector and one end plain.

5 m

4 ATA interface MRE-340 5 Cables for external

monitor/external buzzer CW-576-0.5M With 10-pin water

resistant connector/D-sub (female)+ buzzer terminal

0.5 m

6 Cable for remote display CW-561-10M With 12-pin water resistant connectors at both ends.

10 m

7 Power rectifier PS-010 With two fuses (5A) 8 AC power cable VV-2D8-3M Both ends plain. 3 m

CW-373-5M With 6-pin water resistant connectors at both ends.

5 m

CW-374-5M With 6-pin water resistant connector and 6-pin connector.

5 m

9 Cable for navigator

CW-376-5M With 6-pin water resistant connector and one end plain.

5 m


xiv 0093842132-02

MRD-103 (Display unit) External View


0093842132-02 xv

MRD-103 (Display unit) Diagram of installation

Dimensional drawing of table installation

Dimensional drawing of Flush-mount installation

Unit : mm (inch)

MAINTENANCE SPACE


xvi 0093842132-02

Flush-mount Installation

How to remove the front frame

Insert a coin and remove the front frameby depressing to lift up the front frame.

Threading hole

Unit:mm (inch)

220(8 21/32)

Screw 4mm×4 pieces

※Not supplied

Threading hole

224 (8 13/16)×224 (8 13/16)

R25

Unit: mm (inch)

Front frame


0093842132-02 xvii

RB714A (Radome/2kw) External View

RB714A

Unit: mm (inch)

RB715A (Radome/4kw) External View

Bow direction

Bow direction

Unit: mm (inch)

(8 2

1/3

2)


xviii 0093842132-02

RB716A (Open array/4kw) External View

Unit: mm (inch)

100 φ

199 (7.83)

185

(7.28)

(0.55) (3.97)

BOW

Antenna rotating radius R500 (3ft antenna) R700 (4ft antenna)

14φx 4 Cable opening

Weight: 3 feet antenna (RW701A-03): 21 kg (46.3 lb) 4 feet antenna (RW701A-04): 22 kg (48.5 lb)

Cut portion of antenna base (scanner unit)

BOW

390

104

MA

X.4

50

220 234

280

RW701A-03:1034 (40 11/16) RW701A-04:1346 (53)

(11)

(9 3/16)

(15 3/8)

(8 21/32)

(17

3/4)

(4 1

/8)

MDC-900 Series Specifications

0093842132-02 xix

Specifications

Specification item Content

Model MDC-921 MDC-941 MDC-940

Antenna-scanner unit

Antenna type Radome (RB714A) Radome (RB715A) Open array(RB716A)

Antenna length 1.2 feet 2 feet 3 feet 4 feet

Output power (Peak) 2 kW 4 kW 4 kW

Output frequency 9445 MHz +/- 30 MHz 9410 MHz+/- 30 MHz 9410 MHz+/- 30 MHz

Horizontal beam width 6.0° 3.9° 2.5° 1.8°

Vertical beam width 25° 22° Antenna rotation rate 24 rpm 24 rpm or 48 rpm 24 rpm or 48 rpm

(48 rpm:24VDC or more)

IF center frequency 60 MHz

Range accuracy Better than 0.9% of maximum range of the scale in use, or 8m, whichever is the greater

Minimum detecting distance

Within 30 m Within 25 m Within 25 m

Range resolution Within 30 m Within 25 m Within 25 m

Warm-up time 2 min

Pulse width 0.1 us, 0.15 us, 0.3 us, 0.5 us, 1 us

Display unit (MRD-103)

Display size/type 8.4 inch color TFT LCD Display VGA

Effective diameter 127.4 mm

Display resolution 480 x 640 pixels

Off-centering Maximum up to 66%

Echo area 2 types (Full screen, Inside of effective diameter)

Presentation modes Head-up, North-up*, Course-up*, WPT-up**

Indication system PPI, PPI/PPI, PPI/NAV

Distance accuracy 8 m or 1% of range

Range scales 0.0625, 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 32 and 48 NM

(MDC-921 up to 24NM, MDC-941 up to 32NM, MDC-940 up to 48 NM)

Video level 8 levels (Colors)

Distance unit (VRM UNIT)

NM, sm, km

Specifications MDC-900 Series

xx 0093842132-02

Alarms IN or OUT

Other functions Interference rejection, Target expansion, VRM, EBL, Parallel index, Cursor

position (Lat/Lon), Bearing (true/relative), Trail*, RGB Monitor output, Slave

display monitor input/output, External Buzzer, Accepts CCD camera

input,Dual display

AIS interface*** 100 targets (Option)

ATA*** 50 targets (Option)

NMEA input/output 2

Input data format and sentences

NMEA0183 (BEC､BWC､BWR､DPT､DBT､GGA､GLL､GNS､HDG､HDM､

HDT､MTW ､MWD､MWV､RMA､RMB､RMC､VHW､VTG､XTE)

Output data format

and sentence NMEA0183 (TTM、TLL)

Power supply 10.8 to 31.2 VDC

Power Consumption (at 24VDC)

45 W or less 55 W or less 70 W or less

Environmental

Operating temperature -15°C to +55°C (Display unit) -25°C to +55°C (Antenna-scanner unit)

Conservation temperature

-30°C to +70°C (Display unit) -40°C to +85°C (Antenna-scanner unit)

Upper limit of humidity 93% +/- 3% (at +40°C)

Water Protection IPX5 (Display Unit) CFR-46 (RB714A) IPX6 (RB715A , RB716A)

Vibration Resistant When the following vibration is applied to equipment respectively under specified condition, its performance should not be affected. • From 2 - 5Hz up to 13.2Hz vibration width +/- 1mm +/- 10% (Maximum

acceleration 7m/s2 constant at 13.2Hz) • From 13.2Hz up to 60Hz Maximum acceleration 7m/s2 constant

Dimension of equipment

Maximum 274 x 263 x 133 mm (Main unit 240 x 240 x 112 mm)

Weight 3.7kg

* Requires heading, speed, and/or position signal input from external equipment including GPS

Compass depending on application of user.

** Requires waypoint data input. *** For true trail, entering the bearing data, ship’s speed data and latitude/longitude are required.

MDC-900 Series Chapter 1 Function explanation and tests

0093842132-02 1-1

Chapter 1 Function explanation and tests 1.1 Operational Outline

The circuit block diagram of MDC-921 is shown in Fig. 1-1, and those of MDC-941 in Fig. 1-2 and MDC-940 in Fig. 1-3.

The electrical circuit of display unit MRD-103 for MDC-900 series consists of 5 circuit portions, and those 5 circuit portions are separated into 3 printed circuit boards (PCB).

The antenna-scanner unit RB714A for MDC-921 consists of one PCB (E38-110*), a microwave circuit, an antenna, and a motor. The PCB (E38-110*) consists of transmitter-receiver circuit and a scanner controller circuit. The microwave circuit consists of a magnetron, a front-end-module (MIC), a limiter diode, T junction and a rotary joint.

The antenna-scanner unit RB715A for MDC-941 consists of one PCB (E38-120*), a microwave circuit, an antenna, and a motor. The PCB (E38-120*) consists of transmitter-receiver circuit and a scanner controller circuit. The microwave circuit consists of a magnetron, a front-end-module (MIC), a limiter diode, a circulator, and a rotary joint.

The antenna-scanner unit RB716A for MDC-940 consists of one PCB (E38-130*), a microwave circuit, an antenna, and a motor. The PCB (E38-130*) consists of transmitter-receiver circuit and a scanner controller circuit. The microwave circuit consists of a magnetron, a front-end-module (MIC), a limiter diode, a circulator, and a rotary joint.


The designation of circuits and PCBs are shown in Figs. 1.1, 1.2 and 1.3.


Fig.1.1 MDC-921 Circuit block diagram

E57-600* E57-700* E57-720*

Display Unit: MRD-103

LCD Module

Power supply

Connector

Logic

Panel

LCD I/F

Antenna-scanner unit: .RB714A .

Microwave pulse

E38-110* 229U29704

Rotary joint

T junction

Antenna Radome

Limiter diode

Magnetron

Front-end -module (MIC)

Motor

Transmitter-receiver /scanner controller

Chapter 1 Function explanation and tests MDC-900 Series

1-2 0093842132-02





E57-600* E57-700* E57-720*


LCD Module

Power supply

Connector

Logic

Panel

LCD I/F

Antenna-scanner unit: .RB715A .

Microwave pulse

E38-120* 229U30957

Rotary joint

Circulator

Antenna Radome

Limiter diode

Magnetron


Motor

Transmitter -receiver /scanner controller

E57-600* E57-700* E57-720*


LCD Module

Power supply

Connector

Logic

Panel

LCD I/F

Antenna-scanner unit:RB716A .

Microwave pulse

E38-130* 229U30921

Rotary joint

Circulator

Antenna Open

Limiter diode

Magnetron


Motor

Transmitter -receiver /scanner controller


0093842132-02 1-3

1.2 Display unit: MRD-103

Table-1.1 MRD-103 Circuit name

Circuit name PCB

① Connector

② Power supply E57-600*

③ Logic

④ Panel E57-700*

⑤ LCD I/F E57-720*


① Connector circuit A connector circuit is composed of eight waterproof connectors which are connected with each outside cable. They are connected with main power source, AIS receiver, remote display, navigation equipment (2CH), antenna-scanner unit, external monitor/external buzzer, CCD camera. There is a filter in each signal line which suppresses unnecessary radiation noise as well as a noise invasion from outside.

② Power supply circuit Power supply circuit outputs 5V, 12V, -12V, 24V and 250V of the inner powers from the ship’s main supply, ranging from 10.8 to 31.2 VDC. 5V, 12V and -12V are supplied to the logic circuit and 12V, 24V and 250V are supplied to the antenna-scanner unit.12 V and 250 V which are supplied to the antenna-scanner unit are equipped with the ON/OFF feature by the instruction from the logic circuit.

③ Logic circuit The Radar signal which was input to the logic circuit is converted into seven kinds of digital signal according to the strength of the signal after processing the signal. Seven digital signals have each own color and displayed in 8.4 inch color LCD by the LCD controller.

④ Panel circuit The panel circuit is composed of 12 key switches and 2 volumes with switch. It controls ON/OFF of the power, the keys and GAIN & STC volumes by the logic circuit. The illumination of the panel is made and adjusted by 18 LED.

⑤ LCD I/F

The LCD I/F is interconnecting PCB between LCD unit and logic PCB.


1-4 0093842132-02

1.2.1 Check and Adjustment of Power supply

Check point and adjust point are shown in Table-1.2 and Table-1.3.

Table-1.2 Checkpoint and Signal

PCB Checkpoint Signal Signal standard

E57-600* TP1,TP2 Regulated voltage 44 V (pulse), floated from PCB ground

E57-600* TP3,TP4(GND) Regulated voltage +5V +/- 0.05V

Note: ground is isolated from internal circuit and chassis *Subject to version change

Table-1.3 Adjustment of Output Voltage

PCB Item Checkpoint Procedure Signal standard

E57-600* +5V TP3-TP4 1. Connect a voltmeter to TP3 and TP4. 2. Adjust the value to +5V by the potentiometer of R86.

+5V +/- 0.05V


Fig.1.4 Checkpoint on E57-600* *Subject to version change

TP4TP3R86TP2TP1


0093842132-02 1-5

1.3 Antenna-scanner unit: RB714A (Radome/2kW, MDC-921)

Table-1.4 RB714A Circuit name

Circuit/parts name PCB /Description

① Transmitter - receiver /Scanner controller

E38-110* (229U29704)

② Magnetron M1489

③ Front-end-module (MIC) NJT1949A

④ Limiter diode NJS6930

⑤ Motor 23G67850-04

⑥ T junctions ------

⑦ Rotary joint ------

⑧ Antenna Radome(1.2feet)

① Transmitter - receiver / Scanner controller Circuit

The Transmitter Circuit consists of a modulator and a pulse transformer. The modulator and the pulse

transformer generates a high voltage pulse to drive the magnetron.

The Receiver consists of a band pass filter, an amplifier and a video detector. The band pass filter

controls the receiver bandwidth. The amplifier amplifies an intermediate frequency (60MHz) raised from

the front-end-module. The video detector detects an envelope of the amplified signal.

The Scanner controller circuit consists of a logic control circuit and a stepping motor control circuit.

② Magnetron The magnetron oscillates at 9445 MHz (+/- 30 MHz) and peak power is approximately 2 kW.

③ Front-end-module (MIC)

The front-end-module converts signals received by the antenna into the intermediate frequency.

④ Limiter diode

The limiter diode protects the front-end-module from damage by excess high power signals.

⑤ Motor

The motor is a pulse stepping type. The motor turns the antenna at 24 rpm.

⑥ T junctions

The T junctions divide a transmitting signal and a receiving signal.

⑦ Rotary joint

The rotary joint connects between the antenna and T junctions during turning antenna.

⑧ Antenna

The antenna is a parabolic type. The antenna transmits a microwave and receives echoes from targets.



1-6 0093842132-02

1.3.1 Checkpoint and Signal

On the scanner PCB, there are checkpoints for maintenance and adjustment. Checkpoints are shown in Table-1.5.

Table-1.5 Checkpoint and signal

Fig.1.5 Checkpoint and signal on E38-110* (RB714A)


Check- point Signal Range

X7 + 5 V + 5 V +/- 0.2 V X8 + 18 V + 18 V +/- 0.5 V X9 Trigger 0 to 5 V (positive pulse)

1.3 V +/- 0.5 V on L pulse 1.1 V +/- 0.4 V on M pulse X10 Magnetron current 0.8 V +/- 0.12 V on S pulse Trigger: 0 to 6 V X12 Video + trigger Video: 0 to -3.5 V

Azimuth: 2.5 to 5 V X13 Azimuth + HM 0 to 5 V HM: 0 to 2.5 V

X14 Interface data 0 to 5 V (Burst pulse) X18 Auto tuning control 9.5 to 19.5 V X19 Clock (19.6608 MHz) Approx. 2 V pulse

X10 X9 X7

X8 X14 X13 X12

X18

X19


0093842132-02 1-7

1.4 Antenna-scanner Unit: RB715A (Radome/4kW, MDC-941)/RB716A (Open array/4kW, MDC-940)

Table-1.6 RB715A/RB716A Circuit name *Subject to version change

Circuit/parts name

RB715A

PCB / Description

RB716A

PCB / Description

① Transmitter - receiver/ Scanner controller

E38-120*（229U30957） E38-130*（229U30921）

② Magnetron MAF1421B

③ Front-end-module(MIC) NJT1949A

④ Limiter diode NJS6930

⑤ Mortar 23G72457-01 23G61668

⑥ Circulator NJC3901D

⑦ Rotary joint ----------

⑧ Antenna Radom (2feet) Open (3feet) RW701A-03 Open (4feet) RW701A-04

① Transmitter - receiver / Scanner controller Circuit

The Transmitter Circuit consists of a modulator and a pulse transformer. The modulator and the pulse

transformer generates a high voltage pulse to drive the magnetron.

The Receiver consists of a band pass filter, an amplifier and a video detector. The band pass filter

controls the receiver bandwidth. The amplifier amplifies an intermediate frequency (60MHz) raised from

the front-end-module. The video detector detects an envelope of the amplified signal.

The Scanner controller circuit consists of a logic control circuit and a stepping motor control circuit.

② Magnetron The magnetron oscillates at 9410 MHz (+/- 30 MHz) and peak power is approximately 4 kW.

③ Front-end-module (MIC)

The front-end-module converts signals received by the antenna into the intermediate frequency.

④ Limiter diode

The limiter diode protects the front-end-module from damage by excess high power signals.

⑤ Motor

The motor of RB715A is a pulse stepping type. The motor of RB716A is a DC motor.

⑥ Circulator

The circulator divides a transmitting signal and a receiving signal.

⑦ Rotary joint

The rotary joint connects between the antenna and the circulator during turning antenna.

⑧ Antenna

The antenna is a slot array type. The antenna transmits a microwave and receives echoes from targets.


1-8 0093842132-02

1.4.1 Checkpoint and Signal

On the scanner PCB, there are checkpoints for maintenance and adjustment. Checkpoints are shown in Table-1.7.

Table-1.7 Checkpoint and Signal

Checkpoint Signal Range

X9 +5V +5V +/- 0.2V

X3 +18V +18V +/- 0.5V

X19 +3.3V +3.3V +/- 0.1V

X4 Trigger 0 to 5V (positive pulse)

1.3V +/- 0.5V on L pulse

1.1V +/- 0.4V on M pulse X5 Magnetron current

0.8V +/- 0.12V on S pulse

Trigger: 0 to 6V X6 Video + trigger

Video: 0 to -3.5V

Azimuth: 2.5 to 5V X7 Azimuth + HM 0 to 5V

HM: 0 to 2.5V

X8 Interface data 0 to 5V (burst pulse)

X18 Auto tuning control 9.5 to 19.5V

X10 Clock (19.6608MHz) Approx. 2V pulse


0093842132-02 1-9

Fig.1.6 Checkpoint on E38-120*(RB715A)


X10

X5

X9X3 X8

X18

X7 X6 X19

X4


1-10 0093842132-02

Fig.1.7 Checkpoint on E38-130*(RB716A)


X10

X5

X9 X3 X8

X18

X7 X6 X19

X4

MDC-900 Series Chapter 2 Input/Output

0093842132-02 2-1

Chapter 2 Input/Output

2.1 Input data

2.1.1 Details of data input format

Checksum: “Exclusive disjunction” of all data between $ and * are used for checksum.

Sentence Data name Bearing and distance to waypoint – dead reckoning BEC $ - - BEC, , xxxx.xx, N/S, xxxxx.xx, E/W, x.x, T, x.x, M, x.x, N, x--x*hh<CR><LF>

Bearing and distance to waypoint BWC $ - - BWC, , xxxx.xx, N/S, xxxxx.xx, E/W, x.x, T, x.x, M, x.x, N, x--x, a*hh<CR><LF>

Bearing and distance to waypoint – rhumb line BWR $ - - BWR, , xxxx.xx, N/S, xxxxx.xx, E/W, x.x, T, x.x, M, x.x, N, x--x, a*hh<CR><LF>

Depth below transducer DPT

$ - - DPT, x.x, x.x, x.x*hh<CR><LF>

Mode indicator

Start of sentence Talker device code

Water depth relative to the transducer (meter)

Checksum

Sentence name

Offset from transducer (meter)Maximum range scale in use


Sentence nameThis field is not used

Waypoint latitude

N:NorthS:South

Waypoint longitude

E:EastW:West

Waypoint ID

Checksum Mode indicator


Sentence name This field is not used

Waypoint latitude

N:NorthS:South

Waypoint longitude

E:EastW:West

Bearing (true bearing)Bearing (magnetic bearing)

Waypoint Distance (NM) Waypoint ID

Checksum


This field is not used

Waypoint latitude

N:NorthS:South

Waypoint longitude

E:EastW:West

Waypoint ID

Checksum

Sentence name

Waypoint Distance (NM) Bearing (magnetic bearing)

Bearing (true bearing)

Bearing (true bearing)Bearing (magnetic bearing)

Waypoint Distance (NM)

Chapter 2 Input/Output MDC-900 Series

2-2 0093842132-02

Depth from transducer to sea bottom DBT

$ - - DBT, x.x, f, x.x, M, x.x, F*hh<CR><LF>

GPS position data GGA

$ - - GGA, xxxxxx.xx, xxxx.xx, N/S, xxxxx.xx, E/W, x, , , , , , , , *hh<CR><LF>

Geographic position – latitude/longitude GLL

$ - - GLL, xxxx.xx, N/S, xxxxx.xx, E/W, , A, a *hh<CR><LF>

GNSS fix data GNS

$ - - GNS, , xxxx.xx, N/S, xxxxx.xx, E/W, x, , , , , , *hh<CR><LF>

Heading, deviation and variation HDG

$ - - HDG, x.x, x.x, E/W, x.x, E/W*hh<CR><LF>


Water depth (feet)

Checksum

Sentence name

Water depth (meter)Water depth (fathom)


UTC of positionLatitude

N:NorthS:South

Longitude

E:EastW:West

GPS quality indicator0: Positioning unable1: GPS positioning 2: DGPS positioning3 – 8: Not acceptable

ChecksumSentence name


Start of sentence

Talker device code

Latitude

N:North S:South

Longitude

E:EastW:West



A:ValidMode indicator


Ship’s heading (Magnetic bearing)


E:East W:West

Magnetic deviation

E:EastW:West

Magnetic variation



Latitude

N:North S:South

Longitude

E:EastW:West

Checksum

Sentence name

This field is not usedMode indicator


0093842132-02 2-3

Ship’s heading (Magnetic bearing) HDM

$ - - HDM, x.x, M *hh<CR><LF>

Ship’s heading (True bearing) HDT

$ - - HDT, x.x, T *hh<CR><LF>

Water temperature MTW

$ - - MTW, x.x, C *hh<CR><LF>

Wind direction and speed MWD

$ - - MWD, x.x, T, x.x, M, x.x, N, x.x, M*hh<CR><LF>

MWV Wind speed and angle $ - - MWV, x.x, R/T, x.x, K/M/N, A*hh<CR><LF>

Start of sentence

Talker device code

Temperature()

Checksum

Sentence name

Start of sentence

Talker device code

Ship’s bearing

Checksum

Sentence name

True bearing


Ship’s bearing

Checksum

Sentence name

Magnetic bearing

Start of sentence

Talker device codeWind direction, 0-359 True bearing


Wind direction, 0-359 Magnetic bearing Wind speed (knots)

Wind speed (m/s)

Start of sentence

Talker device code Wind direction, 0-359


R:relativeT:true

Wind speed

K:km/hM:m/sN:knots

A:data validV:data invalid


2-4 0093842132-02

Recommended minimum specific LORAN-C data RMA

$ - - RMA, A, xxxx.xx, N/S, xxxxx.xx, E/W, , , x.x, x.x, , , *hh<CR><LF>

Recommended minimum navigation information RMB

$ - - RMB, A, , , , c--c, xxxx.xx, N/S, xxxxx.xx, E/W, x.x, x.x, , , a*hh<CR><LF>

Recommended minimum specific GNSS data RMC

$ - - RMC, , A, xxxx.xx, N/S, xxxxx.xx, E/W, x.x, x.x, , , a*hh<CR><LF>

Water speed and ship’s bearing VHW

$ - - VHW, x.x, T, x.x, M, x.x, N, x.x, K*hh<CR><LF>

Start of sentence

Talker device code

Latitude

N:North S:South

Longitude

E:EastW:West

Checksum

Sentence name

A:data valid V:blink

Speed over ground (knots)

Course over ground (true bearing)



E:EastW:West

Start of sentence

Talker device code

N:NorthS:South

Waypoint longitude

Checksum

Sentence name

A:data valid This field is not used

Waypoint latitude

Waypoint ID

Mode indicator

Waypoint distance (NM)

Waypoint bearing (true bearing)This field is not used


N:North S:South

Waypoint Longitude

E:EastW:West


A: data valid,


Waypoint latitude Mode indicator

Speed over groundCourse over ground, degree true



Sentence name

Ship’s bearing (true bearing)Ship’s bearing (magnetic bearing)

Speed (knot) Speed (km/h)

Checksum

V: navigation receiver warning

Sentence


0093842132-02 2-5

ChecksumMode indicator

N=nm (nautical miles)Direction to steer, L/R (left/right)

Magnitude of cross-track error

A: data valid

A: data valid

Course over ground and ground speed VTG

$ - - VTG, x.x, T, , , x.x, N, x.x, K, a*hh<CR><LF>

Cross-track error, measured XTE

$ - - XTE, A, A, x.x, a, N, a*hh<CR><LF>

2.1.2 Priority of received data

Information Priority of sentence Latitude and longitude GGA＞RMC＞RMA＞GNS＞GLL Ship’s bearing HDT＞HDG＞HDM＞VHW＞RMC＞RMA＞VTGShip speed RMC＞RMA＞VTG＞VHW Waypoint BEC＞BWC＞BWR＞RMB Cross-track error RMB＞XTE Wind direction MWV＞MWD Wind speed MWV＞MWD Water depth DPT＞DBT Water temperature MTW

2.2 Output data

2.2.1 Detail of data output format

Designation of data standard: IEC 61162-1

From the data connectors (J3 and J4) at the rear of equipment, target data of automatic tracking aid is being output.

Checksum: “Exclusive disjunction” of all data between $ and * are used for checksum.


Sentence name

Course over ground (true bearing)

Speed over ground (knot)Speed over ground (km/h)

Checksum


Mode indicator


Sentence name


2-6 0093842132-02

Sentence Data name Tracked target messege TTM*

$ RA TTM, xx, x.x, x.x, T, x.x, x.x, T, x.x, x.x, N, , a, a, , a *hh<CR><LF>

Target number, position(LAT/LON),name and time TLL** $ RA TLL, xx, xxxx.xx, N/S, xxxx.xx, E/W, , , a, a *hh<CR><LF>

*: To output TTM sentences, ATA PCB (option) is required. **: To output TLL sentences, it is required to input latitude and longitude from GPS sensor (option).

2.3 Interface specifications

2.3.1 AIS data input specifications

Input connector: J1 Connector used: LTWD-06PMMP-LC Connector coupled: LTWD-06BFFA-L180 Connecting cable: CW-376-5M (5m with 6-pin water resistant connector and one end plain) Please refer to an Operation manual for wiring.

Serial data input (Listener side): Capable to receive standard type signals in accordance with IEC 61162-1. Input load: 330 + 330 Ω Circuit configuration: Photo-coupler, Product name TLP115A (Toshiba)


Sentence name

Target number (00-99)

Checksum

Target distance (NM)

Target distancefrom own ship, true bearing

Target speed

Target course, true bearing

Most approach distance (NM)

Time to most approach point CPA (min)

Speed Distance unit (K/N/S)This field is not used

Target status L:Lost Q:Query T:Tracking

Reference target=R

Type of acquisition A:Automatic M:Manual R:Reported



Sentence name


Target latitude

N:North S:South

E:EastW:West

Checksum

Target number 00-99

Target longitude

Target statusL:Lost Q:Query T:Tracking

Reference target=R

AISIN+

AISIN-

330Ω AIS input A

AIS input B

+ Vcc

Serial data input circuit

TLP115A

330Ω

Display unit upper view

① GND ② Un-connected ③ Un-connected ④ AISIN+ ⑤ AISIN- ⑥ Un-connected

②

①

③④

⑤⑥

J1


0093842132-02 2-7


2.3.2 Radar signals input/output specifications

Input/output connector: J2 remote Connector used: LTWU-12PMMP-LC Connector coupled: LTWBU-12BFFA-L180 Connecting cable: CW-561-10M

2.3.3 NMEA/IEC 61162 input/output specifications

Input connector: J3 and J4 Connector used: LTWD-06PMMP-LC Connector coupled: LTWD-06BFFA-L180 Connecting cable: CW-376-5M (5m with 6-pin water resistant connector and one end plain)

CW-373-5M (5m with 6-pin water resistant connector at both ends), etc.

Serial data input (Listener side):

Capable to receive standard type signals in accordance with IEC 61162-1. Input load: 330 + 330 Ω Circuit configuration: Photo-coupler, Product name TLP115A (Toshiba)

RX+

RX-

330Ω Data input A

Data input B

+Vcc

Serial data input circuit

TLP115A

330Ω


① GND ② NMEA TX+ ③ NMEA TX- ④ NMEA RX+ ⑤ NMEA RX- ⑥ +12 V output

②

①

③ ④

⑤ ⑥

J3

① GND ② NMEA TX+ ③ NMEA TX- ④ NMEA RX+ ⑤ NMEA RX- ⑥ Un-connected

J4

②

①

③④

⑤⑥

① Video output ② Trigger output ③ GND ④ Azimuth output ⑤ Heading line output ⑥ GND ⑦ Video signal input ⑧ Trigger input ⑨ GND ⑩ Azimuth input ⑪ Heading line input ⑫ + 12 V output

J2

①②

③④

⑧

⑤

⑦

⑥

⑨

⑩⑪ ⑫


2-8 0093842132-02

Serial data output (Talker side):

Capable to transmit standard type signals in accordance with IEC61162-1. Circuit configuration: RS422 driver IC, Product name AM26C31I (TI)

2.3.4 Signal specifications of external buzzer and monitor

Output connector: J6 Connector used: LTWBU-10PMMP-LC Connector coupled: LTWBU-10BFFA-L180 Connecting cable: CW-576-0.5M (5m with 6-pin water resistant connector and one end plain)

Signal specifications:

Name of signal Frequency Polarity Pulse width Level Impedance

Horizontal synchronizing signal (H-SYNC) 31.25 kHz Negative 3.84 μs TTL 47 Ω

Vertical synchronizing signal (V-SYNC) 59.5 Hz Negative 64 μs TTL 47 Ω

R,G,B image signal - Positive - 0.7 Vp-p 47 Ω

External buzzer + (BZ+) DC Positive - On board power supply

Current capacity 1 A

Output circuit of horizontal synchronizing, vertical synchronizing signals:

47 Ω

GND

TC74VHCT08 Horizontal synchronizing and vertical synchronizing signals

Grounding

H-SYNC/V-SYNC

Serial data output circuit

TX-

Data output

TX+

AM26C31I


① R ② R-GND ③ G ④ G-GND ⑤ B ⑥ B-GND ⑦ H-SYNC ⑧ V-SYNC ⑨ External buzzer + ⑩ External buzzer -

J6

①②

③

④

⑧

⑤

⑦

⑥

⑨

⑩


0093842132-02 2-9


① Camera 1 Input ② Camera 1 GND ③ Not-used ④ Not-used ⑤ Not-used ⑥ Not-used ⑦ Not-used J7

②

①

③④

⑤

⑥

⑦

R,G,B image signal output circuit:

Buzzer output specifications:

*Max.current: 1A

2.3.5 CCD camera input signal specifications

Output connector: J7 Connector used: LTWD-07PMMP-LC Connector coupled: LTWD-07BFFA-L180 Connecting cable: CW-405-0.3M Cable used: 3C-2VS (75 Ω) Input signal format: NTSC/PAL/SECAM method composite video signal

R/G/B

GND

R, G, B image signals

Grounding

47 Ω LMH6683

BZ +

BZ - 10.8 to 31.2 VDC

On board Power supply +

On board Power supply -

Main power fuse 8 A

Camera Input

GND

75 Ω

NTSC/PAL/SECAM

Grounding

CCD camera image signal input circuit


2-10 0093842132-02

2.3.6 Antenna-scanner unit signal specification

Input/output connector: J5 Connector used: SRCN2A21-16S-TH-N

Connecting cables: (MDC-921) 242J160680A-10M 242J160680B-15M 242J160680C-20M 242J160680D-30M

(MDC-941) 242J158055A-10M 242J158055B-15M 242J158055C-20M 242J158055D-30M

(MDC-940) 242J159098A-10M 242J159098B-15M 242J159098C-20M 242J159098D-30M

Data Communication

The Antenna-scanner unit is controlled by the display unit through the communication lines DAT and DAT-R.

The following control signal and data are included in data.

Control signal:

(1) Trigger on/off and trigger frequency (2) Transmission pulse width (3) IF band width (4) Antenna motor pulse rate (5) Azimuth pulse rate (6) Manual tuning voltage (7) Auto tuning start/stop (8) Auto tuning center frequency

Data:

(1) Tuning voltage monitor (2) Tuning meter level (3) Magnetron current (4) Magnetron heater voltage (5) High voltage

Data Format Type Asynchronous serial data (half duplex)

Start bit 1 bit Data bit 8 bits Stop bit 2 bits

Structure

Parity bit Non Speed 4,800 bps Format Binary Note: not in ASCII code Level 0 to 5 V


J5

④ ③ ② ①

⑨ ⑧ ⑦ ⑥ ⑤

⑬ ⑫ ⑪ ⑩

⑯ ⑮ ⑭

① + 250 V ② + 24 V ③ + 12 V ④ GND ⑤ DAT-R ⑥ DAT ⑦ Un-connected⑧ BP/SHF ⑨ BP/SHF-R ⑩ V/TRIG ⑪ Un-connected⑫ SHIP’S+ ⑬ SHIP’S+ ⑭ V/TRIG-R ⑮ SHIP’S- ⑯ SHIP’S-

MDC-900 Series Chapter 3 Maintenance

0093842132-02 3-1

Chapter 3 Maintenance

3.1 Maintenance and Cleaning To operate the radar equipment in a good condition for a long period of time, perform the inspection and cleaning periodically.

3.1.1 Monthly Inspection

Caution:

Do not turn on the power of the radar duringinspection.

(1) When the screen is dirty, the images will become faint. For cleaning of the display panel, use a soft and clean cloth impregnated with diluted mild detergent for wiping off. Please be careful not to cause abrasion on the surface because it is delicate. Thinner shall not be applied.

(2) For cleaning of housing, do not use plastics solvent such as thinner or alcohol. Coating on the

surfaces and characters on control part may be dissolved. Wipe off with soft dry cloth after having cleaned with soft clean cloth impregnated with diluted mild detergent.

(3) Check for that the radiation surface of the antenna is not dirtied by soot. Dip a soft cloth into water

or soap water, wring lightly and wipe the antenna with the cloth. Check for damage and paint sticking.

Note: Before performing the maintenance and inspection of the radome antenna, thread a string through the hole of radome (upper) as illustrated next page and hang it up.

Caution Never use a thinner solvent. The filter surface will be chemically decomposed, resulting in the loss of the transparency.

Thinner solvent

Chapter 3 Maintenance MDC-900 Series

3-2 0093842132-02

3.1.2 Yearly Inspection

In case of open antenna (RB716A), check the brush of the antenna drive motor inspect every 2,000 hours of transmission. If the length of the brush is shorter than 6mm, replace it with a new one.

Press the [MENU] key and select [MAINTE] ⇒ [DISPLAY UNIT], message of transmission time is displayed.

approx. 6mm

Contacting surface Motor brush

(1) Loosen the fixing screws and remove the cover of the scanner at the bow side. The antenna drive motor can be seen at the lower side in the scanner unit.

(2) Referring to the illustration below, remove the motor brushes with the flat screw driver.

(3) Insert the flat the screw driver in the groove of the brushes and rotate it counterclockwise and slowly. Be sure to replace both brushes at the both sides.

(4) Insert new brushes and install the brushes in reverse steps.

Before opening the cover of the scanner, be sure to turn off the power of the radar equipment to avoid the electrocution.

WARNING:

Fixing screw

Hole

A : Top View

String

String

A

Radome (upper)

Radome (lower)

Inside of scanner unit

Motor Motor brushes

Motor Motor brush

To remove the motor brush, turn it counterclockwiseand slowly with the flat screw driver.

MDC-900 Series Chapter 3 Maintenance

0093842132-02 3-3

3.2 Fuse Replacement

If the input voltage is too high, hyper-current flows or a trouble occurs inside, the fuse in the rear panel blows out.

Type and specification of the fuse:

Application Shape and dimensions (mm) Fuse characteristic Rating

Main power supply Tube type (6.3 dia. x 32) Normal meltdown 8A

Location of fuse:

3.3 Consumables

This unit uses the magnetron which is the consumables and needs the replacement periodically. The magnetron is housed in the scanner unit. When it is hard to see an image at a far distance, the magnetron may be deteriorated. In this case, replace the magnetron. When replacing the magnetron, consult your sales dealer.

Press the [MENU] key and select [MAINTE] ⇒ [DISPLAY UNIT], message of transmission time is displayed.

Replacement target: Normally 3,000 hours

Warning Specified fuse shall be used.If a fuse other than specified one is used, it may cause serious failure

Fuse (8A)

MDC-900 Series Chapter 4 Trouble shooting

0093842132-02 4-1

Chapter 4 Trouble shooting

In this chapter, the easy procedure for trouble shooting is described to find out failures parts on a ship.

4.1 Necessary information at the time of the request to repair

Please provide the following information.

(1) Name of ship, telephone number if the satellite communication system is equipped (2) Type and name of equipment (3) Serial number of the equipment (4) [ROM version] indicated in [MENU] ⇒ [MAINTE] ⇒ [DISPLAY UNIT] (5) Port of next arrival, arrival schedule and dealer name (6) Trouble in details and/or inspected result on a ship

4.2 Provided self diagnostic facilities

The error display and the self-diagnostic menu are provided in the equipment.

4.2.1 Error display

When an trouble occurs in the equipment or by miss-operation, the content of the troubles are displayed on the radar screen. The error, alarm and warning are provided at the time of troubles. When a trouble is confirmed in the radar, and after recording the trouble classification, abnormal location and abnormal content, press the [ENT] key.

Then alarm and error indication are off.

Error Content

Chapter 4 Trouble shooting MDC-900 Series

4-2 0093842132-02

Table 4.1 Error display list

Error Display Causes L/L NO SIGNAL The latitude and longitude is not entered. HDG NO SIGNAL The bearing signal is not entered. SPD NO SIGNAL The ship speed signal is not inputted. ANTENNA ERROR 1 The trigger signal is not inputted from the Antenna-scanner unit. ANTENNA ERROR 2 The video signal is not inputted from the Antenna-scanner unit. ANTENNA ERROR 3 The heading signal or azimuth signal is not inputted from the

Antenna-scanner unit. ANTENNA ERROR 4 The auto tune is abnormal. ANTENNA ERROR 5 The transmission voltage (+250V) is abnormal. ANTENNA ERROR 6 The magnetron current is abnormal. ANTENNA ERROR 7 The heater voltage of the magnetron is abnormal.

4.2.2 Self-diagnostic menu

The self-diagnostic menu is provided in the equipment.

1. Press “MENU”. 2. Select “MAINTE”.

4.2.2.1 Display unit

The display unit is automatically checked. When checking of memory is normal, OK is displayed and when abnormal, NG is displayed.

However, when optional items AIS IF PCB “AIS-110” and ATA PCB “MRE-340” are not incorporated, “UNCONNECTION” is displayed at checking of AIS and ATA.

ROM VERSION KM-E72* Ver.X.XX MEMORY ROM OK RAM OK HOUR METER OPERATING TIME XX.XH TRANSMISSION TIME XX.XH

AIS KM-E70* VXX.XX ATA KM-E52* Rev.X.XX XX/XX/XX XXXX

MENU : END : RETURN

DISPLAY UNIT The version No. of the program is displayed

When an optional AIS-110 is incorporated, the version No. of its program is displayed.

When an optional MRE-340 is incorporated, the version No. of its program is displayed.


0093842132-02 4-3

4.2.2.2 Antenna-scanner unit

The status of Antenna-scanner unit is displayed.

4.2.2.3 Operation panel test

A picture of a keyboard without any figures on is displayed on the screen. When any key is pressed, the pattern corresponding to it is marked out. If all keys have been pressed in order and all patterns have been marked out, the keyboard is normal. When there is any pattern that has not been marked out even if all keys have been pressed, it is regarded as the key has a failure.

There are two kinds of knobs, one is for GAIN and another for STC. When a relevant knob is turned, the relevant value displayed on the LCD and will vary depending on the positions. The minimum value (when the position of knob is at 0) is 000 and the maximum value (when the position of knob is 10) is 1023. When the value does not vary or the varying range is not normal, then the knob is regarded as failure.

At panel test, twice pressing of any key returns to the menu display.

ANTENNA TYPE RBXXXA XXkw RADOME STATUS HM, AZIMUTH OK TRIGGER OK VIDEO OK HIGH VOLTAGE (DISPLAY) OK HIGH VOLTAGE (ANTENNA) OK AUTO TUNE VOLTAGE OK MAGNETRON CURRENT OK MAGNETRON VOLTAGE OK

ENT : Test transmission execution. MENU : END : RETURN

ANTENNA The type of antenna connected is displayed. When no antenna is connected, --- is displayed.

Prior to transmission, NG is displayed.

When no Antenna-scanner unit is connected, nothing is displayed.

PANEL TEST

Volume test (0 to 1023)

GAIN VOLUME

STC VOLUME xxx

xxx

Twice pressing of any key returns to the menu display.


4-4 0093842132-02

4.2.2.4 LCD test

Every press of ENT key changes the screen. The kinds of screen displayed are as follows: Pressing “MENU” returns to the menu display.

Grate → Color pattern of RGB 6 → White → Black

4.2.2.5 Operating hours reset

The memorized operating hours are reset.

4.2.2.6 TX hours reset

The memorized transmitting time is reset. When the magnetron is exchanged or when the Antenna-scanner unit is replaced, please perform this reset.

4.2.2.7 All reset (Initialization)

The internal memory is reset. All of the set values are returned to the factory-settings (initial setting).

4.2.2.8 System program update

The system program is renewed from the external equipment. During updating, do not switch off the power supply until an instruction appears.

4.2.3 NMEA input signal monitor

The monitoring function of NMEA input signal from external navigation equipment is available. 1. Press “MENU”. 2. Select “NMEA”, (CH1(J3) or CH2(J4)). 3. Press [] [] for selecting baud rate. 4. Press “”, then the monitor displays NMEA monitor. If the external navigation equipment is

connected with correct baud rate received NMEA sentence is displayed.


0093842132-02 4-5

4.3 Trouble Diagnosis

4.4 Failure diagnosis flowchart

This chapter specifies necessary information required for malfunction diagnosis and repair of the radar system.

No. Diagnosis item Power supply is abnormal. 1.1 Power supply cannot be switched on.

2.1 LCD does not illuminate. 2.2 Vertical or horizontal synchronization is turbulent. LCD is abnormal. 2.3 Brightness is abnormal. 3.1 Antenna-scanner unit does not respond. Radar image is

abnormal. 3.2 No radar images are displayed. 4.1 Any keys or knobs can not be operated. 4.2 Panel illumination is abnormal. Panel is abnormal. 4.3 No buzzer sound with key operation.

5.1 Data such as ship’s bearing, ship’s speed, and latitude and longitude cannot be input. Characters display

is abnormal. 5.2 AIS information is not displayed. 6.1 Serial data are not output. Others 6.2 Backup can not be performed 7.1 + 12 V and housing are short-circuited. 7.2 + 250 V and housing are short-circuited. 7.3 Failure in control function of pulse width. 7.4 Antenna does not rotate. 7.5 Antenna error 3 is displayed. 7.6 Transmit is impossible. 7.7 Manual synchronization does not work. 7.8 Automatic synchronization does not work.

7.9 Radar images are not displayed. (No reflection receiving signal is seen.)

Antenna-scanner unit is abnormal.

7.10 GAIN is low.

Caution

Even the power supply is switched off, there may be high voltage remained at the capacitor inside of the transmitting and receiving display unit. For securing safety at repairing works and inspection works, please make sure that the residual charge after switching power off the power supply has been discharged or the works shall be started after 3 minutes of the switching off.


4-6 0093842132-02

Power supply is abnormal

1.1 Power cannot be switched on

Is the main power fuse at rear panel is normal? (Isn’t it melted down?)

Is the specification of the fuse correct (8A)?

NO

YES

Make the on board power supply voltage within specification. Inspect wiring on ship.

Are the internal wire harnesses in display unit correctly connected?

When power supply key is pressed, is the resistance between connectors J701-6 and 7pins of main PCB 44 Ω?

Caution: This item is measured with power cable disconnected.

NO Exchange the fuse.

Is the polarity of on board supply correct?

Connect correctly.

YESThe power supply PCB (E57-600*) is faulty.

Is the on board power supply is normal? (10.8 to 31.2 VDC)

NO

Connect correctly.

YES

The power supply switch is faulty.

When power supply key is pressed, is the resistance between connectors J601-6,7 and 7pins of main PCB 44 Ω?

Caution: This item is measured with power cable disconnected.

1 MΩ: Wire harness (E57ELA101*) is faulty.

When power supply is ON, is the voltage at connector J701-8 pin of main PCB 0 V?

When the power supply is ON, 3.3 V (Power OFF signal is consistently displayed): the main PCB (E57-700*) is faulty. YES

When power supply is OFF, is the voltage of the main PCB connector J701-9 pin about 5 V?

The power supply PCB (E57-600*) is faulty.

When power supply is ON, is the voltage at connectors J701-12 and 13 pins 5 V, J701-14 and 15 pins 12 V and also at J701-16 pin 12 V?


YES The main PCB (E57-700*) is faulty.

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO



0093842132-02 4-7

LCD is abnormal

LCD is abnormal

2.1 LCD does not light

Is each wire harness to LCD unit connected correctly?

The LCD flat cable is faulty. The LCD is faulty.

The power supply is faulty. (To item 1.1 Power cannot be switched on.)

When power supply is switched ON, does a buzzer sound?

YES

NO

NOConnect correctly.

When power supply is ON, does LCD illuminate distantly?

NO The contact of J706 is faulty. The LCD lamp is faulty.

Main PCB: Have signals at J705-29, 30and 31 pins changed?

NO The LCD control of main PCB (E57-700*) is faulty.

YES

YES

As the screen brightness is set at dark, change the set value.

Is the screen brightness set at the minimum (1)?

NO

YES

Is R287 on main PCB 3.3 V? NO

The main PCB (E57-700*) is faulty.

Is approximate 45 V pulse generated at the both ends of C304 on main PCB?

NO The Inverter circuit of main PCB (E57-700*) is faulty.

2.2 Vertical or horizontal synchronization is turbulent

Is the flat cable between LCD unit and logic PCB connected correctly?

Main PCB: Have the signals at 29, 30 and 31 pins of J705 varied?


The LCD flat cable is faulty. The Contact of LCD I/F PCB (E57-720*) is faulty. The LCD is faulty.

NO The LCD control on main PCB (E57-700*) is faulty.

YES

YES

YES

YES

YES




4-8 0093842132-02

LCD is abnormal

Radar images are abnormal

Is the voltage between X1-1pin (RB714A)/J12-2pin(RB715A,RB716A) of Antenna-scanner unit and earth 12 V?

3.1 There is no response from Antenna-scanner unit

The wiring of Antenna-scanner unit connecting connector is faulty. The main PCB (E57-700*) is faulty.

In the operation through MENU ⇒

MAINTE ⇒ ANTENNA, is the type of antenna displayed correctly?

Is the voltage between pin 3 of J5 (Antenna-scanner unit connecting connector) of power PCB and earth 12 V?

Is the voltage between X5-4 pin (RB714A) / J13-4 pin (RB715A,RB716A) of PCB in modulator and earth 5 V?

NO

YES


YES

The TX/RX PCB is faulty.

When the Antenna-scanner unit connecting connector is pulled out, does J5-3 pin become to be 12 V?

NO NO

YES The TX/RX PCB is faulty.

NO

YES

NO The TX/RX PCB is faulty.

Is the connecting cable between display unit and Antenna-scanner unit correct?

YES

The cable or contact is faulty. NO

The TX/RX PCB or main PCB is faulty. YES

2.3 Brightness is abnormal

As the screen brightness is set at dark, change the set value.

Is brightness dark immediately after power ON (Display of KODEN)?

Does brightness change with operation from panel?

The main PCB (E57-700*) and inverter circuit are faulty. Contact of J706 is faulty.

NO

YES

YES The LCD lamp is faulty.

NO




0093842132-02 4-9

Radar images are abnormal

Panel is abnormal

4.1 Keys operation or knobs operation is impossible

Can the operation of MENU ⇒ MAINTE ⇒ PANEL TEST be displayed?

The menu key is faulty. The main PCB (E57-700*) is faulty.

NO

YES

When all keys and knobs are operated at operational panel test, are there any keys or knobs that do not work?

The main PCB (E57-700*) is faulty. NO

Replace all keys or knobs that do not work.

YES

3.2 There are no radar images

When the GAIN knob is turned to the maximum, can noise be seen at the background of radar images?

YES

To the item of abnormality of Antenna-scanner unit

Is an alarm for antenna error shown in the screen?

NO NO

YES


YES

Is the Antenna-scanner unit connector connected?


Is radar images displayed?

YES

Is the receiving GAIN normal over the whole range?

YES


NO

Is the alarm for antenna error 3 shown on the screen?


YES


When GAIN is low in the long range, is the transmitter-driving signal (TP2) on TX/RX PCB normal?

NO


The heading line signal or azimuth signal is faulty.

YES

NO



Refer to 7.1 to 7.10




4-10 0093842132-02

Panel is abnormal

Panel is abnormal

Is 12 V correct?

4.3 Key operation does not make buzzer sound

The power supply + 12 V rectification circuit is faulty. The + 12 V line is short-circuited.

NO

YES

At each pressing of a key, does the foot of buzzer (DS20) become sine wave?


Is MENU ⇒ ASSIST ⇒ BUZZER ON?

Make the set value ON. NO

YES

The buzzer (DS20) is faulty. YES

4.2 Panel illumination is abnormal

Is 12 V normal? The power supply + 12 V rectification circuit is faulty. The + 12 V line is short-circuited.

NO

YES

Do all light? The relevant LED is faulty. NO

Is the setting of panel brightness appropriate?

Pressing the brightness key, adjust the panel brightness adjustment to be appropriate value.

NO

YES

YES





0093842132-02 4-11

Character display is abnormal

5.1 Data such as heading direction, ship speed, and latitude and longitude are not input

Is the navigation data (IEC 61162-1) connected to connector (J3, J4)?

Connect correctly. NO

When MENU⇒ NMEA ⇒ CH1 (J3) or CH2 (J4) ⇒ the baud rate of Input signal is selected, are the contents of navigation data displayed on the screen of monitor?

YES

Is the baud rate identical with the input signal?

YES

Select MENU ⇒ NMEA ⇒ CH1 (J3) or CH2 (J4) ⇒ the baud rate of Input signal.

NO

NO Is the polarity of signal normal?

Make the polarity normal.

Is the voltage between pins 4 and 5 of connectors J3 and J4 not less than 4 V?

The signal voltage is not normal. Take the required measures to provide the normal voltage.


YES

YES

Do the data input from connector (J3,J4) have appropriate forms?

NO Allow the required data to be transferred from navigation equipment.


Are the wiring harnesses in display unit connected correctly?

Connect correctly.

YES

YES

NO

NO

NO

YES



4-12 0093842132-02

Character display is abnormal

Return the signal from AIS receiver to J1.

5.2 AIS information is not displayed

Is AIS interface “AIS-110 (option)” built-in?

Incorporate AIS interface “AIS-110 (option)”.

NO

Connect the signal from AIS receiver to J4. When MENU ⇒ NMEA ⇒ CH2 (J4) ⇒38400 bps ⇒ monitor screen are selected, are characters displayed on the monitor screen?

YES

Is the signal from AIS receiver connected to J1?

YES


NO Is the polarity of signals normal?

NO

YES


Is the voltage between pin 4 and pin 5 of connector J1 on power supply PCB 4 V or higher?

The signal voltage is not normal. Take the required measures to provide normal voltage.

The AIS interface “AIS-110” is faulty.

YES

The AIS interface is faulty. The main PCB (E57-700*) is faulty.

Are the wiring harnesses in the display unit connected correctly?

Connect correctly.

YES

Can the menu for MENU ⇒ AIS be selected?

YES

The AIS interface “AIS-110” is faulty. The main PCB (E57-700*) is faulty.

NO

Is MENU ⇒ AIS ⇒ AIS ⇒ ON?

YES

Switch on it. NO

Is MENU ⇒ AIS ⇒ Detecting range too narrow?

NO

(To confirm AIS display), set the range at 20.0 nm.

YES

YES

YES

Are bearing signals, ship speed signals and latitude and longitude information input?

Input bearing signals, ship speed signals and latitude and longitude information.

NO

NO

NO



0093842132-02 4-13

Others

Others

Is power switched off with pressing the power key for 3 seconds?

6.2 Backup is impossible


When the power is switched off, keep the power key pressed for 3 seconds.

NO

YES

Short-circuit between 2 – 4 pins and 3 – 5 pins of connectors J3 or J4 for output. When MENU ⇒ NMEA ⇒ CH1 (J3) or CH2 (J4) ⇒ Monitor screen is selected, is $PKORD... displayed with pressing the range key?

6.1 Serial data are not output

Is the polarity of signals normal?

YES



YES

Are the wiring harnesses in the display unit connected correctly?

Connect correctly.

Are the connectors (J3 and J4) connected to the connectors of output devices?


YES

Is the baud rate identical with the required signals from output devices?

YES

Select the baud rate from MENU ⇒

NMEA ⇒ CH1 (J3) or CH2 (J4)⇒ Select baud rate of signals input.

NO

The main equipment is normal. Signal level between external equipment is faulty. There may be any differences in sentences.

YES

NO NO

NO




4-14 0093842132-02

Abnormality of Antenna-scanner unit



Wiring within the Antenna-scanner unit is faulty or the display unit is faulty.

7.1 + 12 V line and housing are short-circuited

If the connector X1 (RB714A) / J12(RB715A,RB716A) on TX/RX PCBs is pulled out, does it recover?

NO

YES

7.2 + 250 V line and housing are short-circuited

If the connector X1 (RB714A) / J11(RB715A,RB716A) on TX/RX PCBs is pulled out, does it recover?


NO

The TX/RX PCB is faulty. YES

7.3 Fault of pulse width control function

Is the driving signal of transmitter abnormal? (X9 (RB714A) / TP2 (RB715A,RB716A) of TX/RX PCB)

The TX/RX PCB is faulty. NO


YES

YES

Is + 24 V (X1-2 pin (RB714A) /J12-1 pin (RB715A,RB716A) of TX/RX PCB) normal?


NO

Waveform of TP2

A

B

5 V

0 V

Pulse width A (ns) B (ms) SP 100 0.5 M1 150 0.56 M2 300 0.67 L1 500 1.2 L2 1 000 2



0093842132-02 4-15


7.4 Antenna does not rotate

Is poly-switch for over current protection of display unit (RT1 on power supply PCB) OFF?

YES Even when the power is off and restarted, does the antenna rotate correctly?

YES

NO

Completion

Can the antenna be rotated manually?

NORotating mechanism such as winding of a rope around antenna and biting of gear is faulty. YES

If the connector X3 (RB714A) / J1(RB715A,RB716A)on TX/RX PCB is pulled out, does it recover?

NO

The motor power supply in the Antenna-scanner unit or wiring is faulty, or the power supply of display unit is faulty.

The motor is faulty.YES

NO

Is the driving power for motor normal? “12 V: between X3-1pin and X3-2pin (RB714A)/between J1-1pin and J1-2pin (RB715A)/ between J1-4pin and J1-5pin (RB716A)”

The motor power supply in the Antenna-scanner unit or wiring is faulty, or the power supply of display unit is faulty.

NO

YES

Is the length of motor brushes (RB716A) within the specified one (6 mm or longer)?

Replace the two motor brushes with new ones.

NO

The motor is faulty.

YES


4-16 0093842132-02



Bearing signal composite pulse of “J12-7 (RB715A, RB716A) or X1-7(RB714A)”

Heading line signal

1.2 msec Bearing signal

5 V

2.5 V

0 V

7.5 Antenna error 3 is displayed

Is “Bearing signal composite pulse” of TX/RX PCB “J12-7 pin (RB715A, RB716A) / X1-7 pin (RB714A)” abnormal?

Wiring within the Antenna-scanner unit is faulty. The display unit is faulty.

NO

YES

3 msec

Is “Heading signal pulse” of TX/RX PCB “J2-1 pin (RB715A, RB716A) / X4-1 pin (RB714A)” abnormal? The TX/RX PCB is

faulty.

YES The reed switch is faulty.

7.6 Transmitting is impossible

Is + 250 V (X1-1 pin (RB714A) / J11-1 pin (RB715A,RB716A)) of TX/RX PCB normal?

Check the connection cable between display unit and Antenna-scanner unit.

NO

YES

Is the trigger signal (X9 (RB714A) / TP2 (RB715A,RB716A)) of TX/RX PCB normal?


YES

Does the pulse transformer make abnormal noise? The TX/RX PCB is faulty.

NO

YES

Is the magnetron heater provided with 6.3V?

Wiring within the Antenna-scanner unit is faulty. The display unit is faulty.

NO

The magnetron is faulty.

YES

NO


0093842132-02 4-17



7.7 Manual synchronization does not work

Is + 24 V of TX/RX PCB normal? Wiring within the Antenna-scanner unit is faulty. The display unit is faulty.

NO

YES

Does the terminal voltage at X5-2pin(RB714A)/J13-2pin(RB715A,RB716A) of TX/RX PCB from 6 V to 9 V with adjustment of manual synchronization?


YES

Is + 5 V at X5-4pin(RB714A) / J13-4pin(RB715A,RB716A) of TX/RX PCB normal?

The TX/RX PCB is faulty. The MIC is faulty.

NO

The MIC is faulty.

YES

7.8 Automatic synchronization does not work

Reset the initial setting of automatic synchronization function.

Does the automatic synchronization function work?


Completion

YES

Is MENU ⇒ ADJUST ⇒ TUNE SELECT ⇒ AUTO?

Reset the initial setting of automatic synchronization function.

NO

YES


4-18 0093842132-02



Is the terminal voltage of MIC monitor within 30 mV to 70 mV?

7.10 GAIN is low

Is “Antenna error 6” displayed? The magnetron is faulty YES


YES

NO

The MIC module is faulty. NO

7.9 Radar images are not displayed (Reflection receiving signal can’t be seen)

Is “Antenna error 6” displayed? YES

The magnetron is faulty.

NO Is the terminal voltage of MIC monitor within 30 mV to 70 mV?

NO

YES

The MIC is faulty.

Is the video signal connection in the connection cable to Antenna-scanner unit normal?

NO Repair the connection faulty parts.

The display unit main PCB (E57-700*) is faulty.

YES


When FTC and STC are set to “0” and the GAIN knob is turned to the maximum, are radar images displayed?

NO

YES Adjust of the FTC, STC and GAIN.


0093842132-02 4-19

4.5 Initialization

The display unit has initialization function. With this function, all set values including menu can be returned to the factory default. The procedures are as follow:

Procedure 1 1. Press “MENU”. 2. Select “MAINTE”. 3. Select “ALL RESET”. 4. Press “ENT”. 5. After initialization, a screen for selection of languages appears. Select one required language and

press “MENU”.

Procedure 2 1. Press “MENU” and “ENT” for power ON and keep pressing until a screen for selection of languages

appears. 2. Select one required language and press “MENU”.

※ HOUR METER can’t be reset with this initialization.

MDC-900 Series Chapter 5 Technical references

0093842132-02 5-1

Chapter 5 Technical references

5.1 Maintenance parts list

5.1.1 MRD-103 Display unit

Ref Drawing: MRD-103 Exploded view of display unit: E57BG1301*

No. Parts Code Name Description Q'ty Remarks

20 0060771780 PCB ASSY E57-600* 1 Power PCB

19 0060771790 PCB ASSY E57-700* 1 Main PCB

15 0060771800 PCB ASSY E57-720* 1 LCD IF board

8 0062705191 LCD module ASSY NL6448BC26-09#G_MRD 1 LCD module with

Filter

0035282510 DC power cable CW-265-2M 1

0035282540 CCD camera cable CW-405-0.3M 1

5.1.2 RB714A 2kW Antenna-scanner unit (RADOME)

Ref Drawing: RB714A ANTENNA-SCANNER UNIT EXPLODED VIEW: 23W68694*

RB714A TR PART EXPLODED VIEW: 23W68695*


U1 0050351109 LIMITER DIODE NJS6931 1

M1 0056211020 STEPPING MOTOR PFC55-48C1[23G67850-04] 1

V1 0058670020 MAGNETRON M1489 1

A2 0059111002 FRONT END MODULE NJT1949A 1

A1 0060771520 PCB ASSY[SCAN] [RB714A]E38-110* 1


Chapter 5 Technical references MDC-900 Series

5-2 0093842132-02

5.1.3 RB715A 4kW Antenna-scanner unit (RADOME)

Ref Drawing: RB715A ANTENNA-SCANNER UNIT EXPLODED VIEW: 23W73352* 1/2, 2/2

RB715A/716A TR PART EXPLODED VIEW: 23W73353*


A0007 0030050005 TR UNIT [RB715A] 229U31024A 1


M1 0056211031 PULSE MOTOR PFC55H-48D1[23G72457-01] 1

S1 0057570104 SWITCH NRS-101G 1

W1 0058330333 CIRCULATOR NJC3901D 1

V1 0058670014 MAGNETRON MSF1421B 1


A1 0060771530 PCB ASSY E38-120* 1

5.1.4 RB716A 4kW Antenna-scanner unit (OPEN ARRAY)

Ref Drawing: RB716A ANTENNA-SCANNER UNIT EXPLODED VIEW: 23W73461*

RB715A/716A TR PART EXPLODED VIEW: 23W73353*

RB716A SCANNER BOX EXPLODED VIEW: E41BG2001*.1

RB716A DRIVE UNIT EXPLODED VIEW: E48BG1013*


A0005 0030050001 TR UNIT [RB716A] 229U31024B 1


1-8 0056280012 MOTOR BRUSH 24Z125209 1

W1 0058330333 CIRCULATOR NJC3901D 1

V1 0058670014 MAGNETRON MSF1421B 1


A1 0060771540 PCB ASSY E38-130* 1

1 0062703175 DRIVE UNIT MOTOR 239H53917B 1 15W

S1 0062703212 HM ASSY 249J138668-03B 1

3 0035830007 AZI PULSE UNIT 249U155426-03B 1

U2 0071803360 FILTER NJC9930[24Z133791] 1



5.2 Exploded view drawings

0093842132-02 5-3


5-4 0093842132-02


0093842132-02 5-5


5-6 0093842132-02


0093842132-02 5-7


5-8 0093842132-02


0093842132-02 5-9


5-10 0093842132-02


0093842132-02 5-11


5.3 Circuit diagrams

0093842132-02 5-12


0093842132-02 5-13


0093842132-02 5-14


0093842132-02 5-15

Documents

MDC-900_SME_1004[1]