JMA-5300MkIIsm

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INDEX > 4.Replacement Procedure > 4.6 Display Unit : Radar Process Unit NDC-1417 2) You will see four fuse holders in a row. Fuse holders 3) Insert the flat screwdriver into the top of a fuse holder and turn the screwdriver while pressing down to remove the top. (Use the flat screwdriver for 3 mm screws.) Press and turn 4) Remove the fuse to check that it is not blown, and if it is, replace it with a new fuse. 5) Check the other three fuses in the same way. 6) Reassemble the unit following the disassembly procedure in reverse. 7) Turn on the system's power and set the true azimuth. [Check points] 1) Check that no error message is displayed. 2) Check that the true azimuth is correctly tracked. (In terms of the resolution and rotation direction.) If the fuse is blown soon after being replaced, it is likely that the GYRO I/F circuit board is faulty. 4-84
INDEX > 4.Replacement Procedure > 4.6 Display Unit : Radar Process Unit NDC-1417 4.6.9 Terminal Board replacement (CQD-1937A) [Required tools] Phillips screwdriver for 3 mm screws [Replacement procedure] 1) Remove the four screws at the top of the process unit cover and the three screws on each side to remove the process unit cover. (Use the Phillips screwdriver for 3 mm screws.) 4 2) Remove all the connectors and cables connected to the terminal board circuit board. Remove 3) Remove the seven screws holding the terminal board circuit in place, and replace it. (Use the Phillips screwdriver for 3 mm screws.) 4) Reassemble the unit following the disassembly procedure in reverse. Remove 4-85
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JMA-5332-12 JMA-5322-7/9/6HS JMA-53
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3.1.3 Circuit Block to be Repaired
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6. Troubleshooting 6.1 Operation Te
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7.3 Terminal Board Connection Diagr
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Section 2 System Configulation 2.1
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JMA-5300MkIIsm

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