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JRC Manuals
Marine Radar
JMA-2253
Field service manual
JRC JMA-2253 Field Service Manual
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Cautions for High Voltage
What to Do in Case of Electric Shock
First-Aid Treatments
In Case Pulse Can be Detected
Tilting Back of Victim's Head
Blowing into Lungs
In Case of Cardiac Arrest
Warning
High Voltage
Antenna
Navigation Aid
List of Illustrations
General
Configuration
Accessories
Specifications
Technical Description
Radome Antenna Unit
Radiator
Radiator Pattern
Block Diagram of Radome Scanner Unit
Radiator Rotating Mechanism
Motor-Encoder
Bearing Reset Switch
Open Array Antenna Unit
Bearing Reset Circuit
Transmitter Unit
Receiver Unit
Receiver PCB
Range, Pulse Length, and PRF Relationships
Block Diagram of Open Scanner Unit
Video Detector Circuit
Video Output Circuit
Tuning Indication Circuit
Gain-STC Circuit
Display Unit
Simplified Block Diagram
Main Control PCB
Video Input Circuitry
Block Diagram of Display Unit
Main Lsi/Video Processor
Sample Clock Generator
Buffer Memory
Video Memory
Control Pcbs
GDC (Graphic Control Memory)
Video Output
Display Monitor
Optional Inputs
Power Supply
Trouble Shooting Guide
Master Reset
Fuse
Fault Finding Procedure
Fuses Used
Operation Checklist
Inter-Unit Terminal Board
Typical Voltages and Resistances
Scanner Unit
Maintenance
Radome Scanner Unit
Lubricating Gears
Rotary Drive Block
Drive Motor
Reduction Gears
Motor
Pedestal
Cleaning the Display Unit Screen
Installation
Selecting the Installation Location
Cabling the Scanner Unit
Rotary Scanner Unit
Installing the Display Unit
Installing the Power Cable
Display Unit Rear Panel
J403 NMEA Connector
Cabling External Buzzer and Other Devices
Connecting an Electromagnetic Compass
Modifications to be Made to the Inboard Power Supply
Cable Assemblies
Interunit Cable
Power Cable
Selecting a Long Cable
After-Installation Adjustments
Installation-Time Check
Functional Check
Adjustment Steps
Rectifier Unit
Adjustment Procedures
Adjustments to be Made When a Part Is Replaced
Tune Presetting
CRT Monitor off Center Adjustment
Adjusting the Scanner Unit
Adjusting the AVR Output Voltage from the Modulator
Adjusting the Transmitter Pulse Width of the Modulator Unit
Adjusting the Maximum Gain of the Receiver
Adjusting the Sea Return Level of the Receiver
Adjusting the Main Bang Suppression Level of the Receiver
Adjusting the Tuning Indicator Level of the Receiver
Adjusting the Display Unit
Adjusting the Brilliance Level
Adjusting the Focus of the CRT Monitor Screen
Adjusting the AVR Output Voltage
Outline Drawing of Scanner Unit
Interconnection Diagram
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Specifications
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Trouble Shooting Guide
3
Interconnection Diagram
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