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Chapter 9 MAINTENANCE AND CHECK
9.6 TROUBLE SHOOTING
As this radar equipment includes complicated circuits, it is necessary to request a specialist engineer for
repair or instructions for remedy if any circuit is defective.
There are also troubles by the following causes, which should be referred to in checking or repair work.
Poor Contact in Terminal Board of Inter-Unit Cables.
Poor contact in terminal board.
The cable end is not fully connected, that it, contacted with earthed another terminal.
Disconnected cable wire.
Poor Contact of Connector with in Unit.
9.6.1 SPECIAL PARTS
Location Parts No. Name Type Code Manufacture
NKE-1066 V101 Magnetron M1624 5VMAA00120 New JRC
NKE-2044 V101 Magnetron MSF1421B 5VMAA00092 New JRC
NKE-2044 A101 Circulator FCX68R 5AJIX00027 Orient Microwave
NKE-2044 A102 Diode Limiter NJS6930 5ATBT00006 New JRC
9.6.2 CIRCUIT BLOCK TO BE REPAIRED
JMA-1032
Location Circuit Block Type Remarks
Scanner Motor unit H-7BDRD0053
Scanner
Transmitter/ receiver
Microwave unit
NZT-1066
Include Magnetron and
Chassis
Display Unit LCD Panel unit NZP-2256
Include Process Circuit
CDC-1433
JMA-1034
Location Circuit Block Type Remarks
Scanner Motor unit H-7BDRD0052A
Scanner Modulation circuit CME-397
Scanner 2ft Radar Antenna NAX-96 Include Horn Antenna
Scanner Transmitter/ receiver NZT-2044
Include Magnetron
Scanner Receiver NRG-242
Display Unit LCD Panel unit NZP-2256
Include Process Circuit
CDC-1433
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