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JRC Manuals
Marine Radar
JMA-2253
Field service manual
Table Of Contents - 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
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Table of Contents
Cautions For High Voltage
3
What To Do In Case Of Electric Shock
4
First-Aid Treatments
4
In Case Pulse Can Be Detected
5
Tilting Back Of Victim's Head
5
Blowing Into Lungs
5
In Case Of Cardiac Arrest
6
Warning
7
High Voltage
7
Antenna
7
Navigation Aid
7
List Of Illustrations
11
General
13
Configuration
13
Accessories
13
Specifications
14
Technical Description
19
Radome Antenna Unit
19
Radiator
19
Radiator Pattern
19
Block Diagram Of Radome Scanner Unit
20
Radiator Rotating Mechanism
21
Motor-Encoder
21
Bearing Reset Switch
21
Open Array Antenna Unit
21
Bearing Reset Circuit
23
Transmitter Unit
23
Receiver Unit
24
Receiver Pcb
24
Range, Pulse Length, And Prf Relationships
24
Block Diagram Of Open Scanner Unit
25
Video Detector Circuit
27
Video Output Circuit
27
Tuning Indication Circuit
27
Gain-Stc Circuit
27
Display Unit
29
Simplified Block Diagram
29
Main Control Pcb
29
Video Input Circuitry
29
Block Diagram Of Display Unit
30
Main Lsi/Video Processor
31
Sample Clock Generator
31
Buffer Memory
31
Video Memory
31
Control Pcbs
32
Gdc (Graphic Control Memory)
32
Video Output
32
Display Monitor
33
Optional Inputs
33
Power Supply
34
Trouble Shooting Guide
35
Master Reset
35
Fuse
35
Fault Finding Procedure
36
Fuses Used
36
Operation Checklist
37
Inter-Unit Terminal Board
40
Typical Voltages And Resistances
41
Scanner Unit
42
Maintenance
43
Radome Scanner Unit
44
Lubricating Gears
44
Rotary Drive Block
44
Drive Motor
45
Reduction Gears
45
Motor
45
Pedestal
45
Cleaning The Display Unit Screen
46
Installation
47
Selecting The Installation Location
47
Cabling The Scanner Unit
50
Rotary Scanner Unit
51
Installing The Display Unit
53
Installing The Power Cable
53
Display Unit Rear Panel
54
J403 Nmea Connector
54
Cabling External Buzzer And Other Devices
55
Connecting An Electromagnetic Compass
56
Modifications To Be Made To The Inboard Power Supply
57
Cable Assemblies
58
Interunit Cable
58
Power Cable
59
Selecting A Long Cable
59
After-Installation Adjustments
60
Installation-Time Check
60
Functional Check
60
Adjustment Steps
60
Rectifier Unit
61
Adjustment Procedures
63
Adjustments To Be Made When A Part Is Replaced
63
Tune Presetting
63
Crt Monitor Off Center Adjustment
63
Adjusting The Scanner Unit
64
Adjusting The Avr Output Voltage From The Modulator
64
Adjusting The Transmitter Pulse Width Of The Modulator Unit
64
Adjusting The Maximum Gain Of The Receiver
65
Adjusting The Sea Return Level Of The Receiver
65
Adjusting The Main Bang Suppression Level Of The Receiver
65
Adjusting The Tuning Indicator Level Of The Receiver
65
Adjusting The Display Unit
66
Adjusting The Brilliance Level
66
Adjusting The Focus Of The Crt Monitor Screen
66
Adjusting The Avr Output Voltage
66
Outline Drawing Of Scanner Unit
67
Interconnection Diagram
70
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