7.3 REPLACEMENT OF MAJOR PARTS
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Replacement of magnetron (V101)
Remove the shield cover of the modulator and check that no charge remains in the high-voltage modulator
circuit. Then, disconnect the lead wire of the magnetron. The magnetron can be demounted by removing the
screws fixing it. When mounting a new magnetron, do not touch the magnet with a screwdriver or put it on an
iron plate. After replacement, connect the lead wire correctly.
Handling of Magnetron under Long-Time Storage
The magnetron that has been kept in storage for a long time may cause sparks and operate unstably when its
operation is started. Perform the aging in the following procedures:
(1) Warm up the cathode for a longer time than usually. (20 to 30 minutes in the STBY state.)
(2) Start the operation from the short pulse range and shift it gradually to the longer pulse ranges. If the
operation becomes unstable during this process, return it to the standby mode immediately. Keep the
state for 5 to 10 minutes until the operation is restarted.
Summary of Contents for JMA-610 Series
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Page 29: ...1 5 1 1 4 EXTERIOR DRAWINGS y Fig 1 1 Exterior Drawing of Scanner Unit Type NKE 316 Unit mm...
Page 30: ...1 6 Fig 1 2 Exterior Drawing of Processing Unit Type NDC 1486 Unit mm...
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Page 165: ...APPENDIX Fig 1 Block Diagram of JMA 610...
Page 168: ...Fig 4 Internal Connection Diagram of Scanner Unit NKE 316...
Page 169: ...APPENDIX Fig 5 Internal Connection Diagram of Control Unit NCM 883...
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