Name: JRC JMA-9252-6CA
Brand: JRC
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General3
General and Equipment Composition5
Troubleshooting5
Composition of Radar System and Ship's Power Supply6
Specifications8
Overall Specifications8
Antenna9
Display Unit10
Repair Block13
Special Parts List14
Spare Parts Fuses15
List of Roms16
Installation17
Installation Cable19
Between 2 Display Units and Interswitch20
Cable for Peripheral Equipments21
Installation of Antenna Unit24
Installation of Display Unit24
Selection of Power Supply Voltage24
Cable End Process25
Connection to Terminals26
Installation of Interswitch Unit27
Table of Interswitch Modification Kit27
Connection for Inner Interswitch Unit27
Adjustment after the Installation30
NSK Unit Adjustment30
Gyro Log Selection Switches32
Initialization33
Tuning Adjustment33
Bearing Adjustment34
Range Adjustment35
True Bearing Adjustment38
Ship Speed Setting39
Selecting 2-Axis Log Data against Ground Speed40
Selecting 2-Axis Log Polarity40
Selecting External Navigator40
If no Navigation Equipment Is to be Used40
If Navigation Equipment 1 Is to be Used41
If Navigation Equipment 2 Is to be Used41
Adjusting the Interswitch43
2-Unit Radar System43
Adjustment of Screen Position44
ROM Version List44
Principle of Function45
Radiator Part47
Scanner Drive Unit47
Transceiver Unit47
Modulator Unit47
Receiver Unit48
Tuning Indicator49
T/R Control Circuit50
CPU Control Part50
MTR Communication50
A/D Converter Circuit50
Short Pulse52
TIY/VD Mixing Circuit52
Bearing Signal Mixing Circuit53
NSK Circuit54
Compatible Angular Velocities55
Log Signals55
Input55
Ship Speed and Number of Pulse55
Power Consumption56
Connection of Signal Cables56
Output56
Function of Other Switches57
Log Signal57
Power Supply Par58
Key Board Part59
Key Board Process Circuit59
Track Ball Circuit59
Panel Circuit 159
CRT Part60
Horizontal Sweep Circuit60
Vertical Sweep Circuit60
Dynamic Focus Circuit60
Blanking Circuit61
CRT Brilliancy Circuit61
Video Amplifier Circuit61
CRT Socket Circuit61
CMC-791 Deflection Circuit Block Diagram63
CPU Control Circuit64
Serial Communication Interface Circuit64
CPU Build-In Serial Communication64
External Serial Communication64
Agdc/Graphic/Ppi Frame Memory Circuit65
Graphic Frame Memory Formation66
PPI Memory Dots Formation66
Graphic Screen Formation67
Iteration/Trail Circuit68
Frame Video Process Circuit69
Timebase Circuit74
Various System Clock Generator Circuit74
Video/Trigger Separator Circuit74
AUTO-STC Control Circuit74
A/D Converter75
Buffer Memory for Speed Converter75
Signal Process Circuit75
Buffer Memory for Sean Converter75
ARPA Process Circuit77
A Feature of JMA-7000/9000 ARPA77
Improvement in Target Defection77
Improvement in Signal Process77
Minimizing Failure of IC Circuit Employment78
Summary of Major Blocks78
Bank Memory Circuit78
Memory Per Gate Circuit79
ARPA CPU Circuit and Peripheral Circuit80
Interswitch Process Circuit82
CPU Circuit82
Communication Control Circuit82
Signal Exchange Control Circuit83
Video Signal Circuit83
Power Supply Circuit83
Understanding of Tuning85
Tuning Method85
Check of Tuning System85
Composition86
Principle86
Specification88
Diagnosis on Trouble Symptom and Recovery Method91
Unable to Supply Power92
Picture Moves Toward Scanner Turning Direction104
No Log Data Displayed105
No Gyro Data Displayed105
ARPA Does Not Acquire Target106
Self Diagnosis Function110
Romver112
Error Log112
Arpa Sts113
Replacement of Major Parts114
Replacement of Magnetron116
Replacement of Diode Limitter116
Replacement of Pin Attenuator116
Replacement of CRT117
Replacement of Geared Motor118
Replacement of ROM121
Adjustment Procedure125
Power Supply Unit Voltage Adjustment127
Inches CRT PSU127
Inches CRT Adjustment127
Adjustment of Timebase135
Adjustment of GAIN MAXB RV3135
Adjustment of GAIN MAXA RV4135
Adjustment of ARPA GAIN MAX RV8135
Adjustment of RV2 ARPA Noise Level136
Adjustment of MBS START RV7137
Adjustment of MBS Level RV5137
Adjustment of Auto-STC and Confirmation of AUTO-RAIN137
Method of ARPA GATE139
Fitting of Options141
Slave Display143
Radar Buoy144
Remote Display144
Unit to be a Slave Radar146
Maintenance149
Antenna NKE-1072/1052151
Turning Drive Unit153
Oiling of Oil-Seal153
Oiling on Gear Mechanism153
Coaxial Cable153

Brand	JRC
Model	JMA-9252-6CA
Category	Marine Radar
Language	English

JRC JMA-9252-6CA User Manual

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