• SIGNA™ Hero 3.0T Service Methods
  • 5852800-8EN Revision 1.0
  • Object ID: 00000018WIA306BA230GYZ
  • Topic ID: id_15667339 Version: 1.25
  • Date: Oct 18, 2021 2:52:52 PM

Body Coil Mount and Base Plate (Front) Replacement

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
2Not Applicable2 hours60 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Nonmagnetic Titanium Service Tool Kit, Large Set1-5112581-
Cut-Resistant Gloves1-

-
non-magnetic small level1-

-
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
Front Body Coil Mount1-

Refer to FRU manual

-
Table 4. Safety

About this task

Overview

Use this procedure to replace the body coil mount and base plate (front).

Topic ID: id_SL15183319-1330661

Body Coil Mount Front Assembly Removal

Procedure

  1. Undock the patient table and move it out of the room.
  2. Remove the left and right control panel covers. Refer to Removing the magnet left and right control panel covers.
  3. Remove the dock interface cover.
    Figure 1. Removing the dock interface cover
  4. Perform LOTO for ISC. Refer to LOTO for ISC.
  5. Remove the front endbell. Refer to Removing the front endbell.
  6. Remove the rear endbell. Refer to Removing the rear endbell.
  7. If installed, remove the 1-piece bridge. Refer to Removing the 1-piece bridge.
  8. Disconnect the two (2) cooling air ducts at the rear end of the body coil.
    Figure 2. Disconnecting the cooling air ducts
  9. Disconnect the HART ID cable at the rear end of the body coil.
    Figure 3. Disconnecting the HART ID cable
  10. Disconnect the CH1 and CH2 drive cables from the RF body coil in the rear.
    Figure 4. Disconnecting the CH1 and CH2 drive cables
  11. Disconnect the bore light cable connectors. (Front End: 2 connectors, Rear End: 2 cables)
    Figure 5. Disconnecting the rear bore lights
    Figure 6. Disconnecting the front bore lights
  12. At rear end of the magnet, remove four M6 bolts and washers securing the RF body coil.
    Figure 7. Removing the M6 bolts and washers
  13. On the front end of the magnet, remove four M6 bolts and washers from the bases of RF coil centering assembly.
    Figure 8. Removing the RF coil centering assembly bolts
  14. Remove the air flow sensors and tape them to the magnet enclosure in a position that will not interfere with the body coil removal.
    Figure 9. Removing the air flow sensors
  15. From the front of the magnet, pull the body coil forward until the front end is outside the bore.
    Figure 10. Moving the body coil
  16. Remove the four M6 screws and large glass laminate washers. Remove the body coil mount front assembly.
    Figure 11. Removing the RF coil body coil mount front assembly
Topic ID: id_SL15183328-1330661

Front Base Plate Replacement

Procedure

  1. Confirm the front base plate is not damaged. If the front base plate is not damaged or body coil mount is not replaced from old type to new type, skip this section and go to Restoration.
  2. Move the body coil location back create enough clearance to access the base plate.
  3. Remove the lower mounting block by removing two screws and washers on the magnet front end.
    Figure 12. Lower mounting block removal (magnet front)
  4. Mark the alignment lines for the base plate on the magnet.
    Figure 13. Marking bracket alignment
  5. Remove the original base plate.
    Figure 14. Removing the base plate
  6. On the new base plate, adjust the height of screw to make the height approximately equal to the original base plate. Then, tighten the lock nuts.
    Note: This adjustment is the rough adjustment for centering the body coil in the magnet bore. Fine adjustment will be done in body coil isolation procedure later. There is no specification in this step.

    • A≒A’

    • B≒B’

    Figure 15. Adjusting the screw height
  7. Attach the leveling block to the base plate with two screws (1000-M10C35-33).
    Figure 16. Attaching the leveling block
  8. Align and install the new front base plate on the Magnet with four screws (1000-M10C45-33) and washers (2000-M10C-10).
    2000-M10C-10
    Figure 17. Installing the base plate
  9. Place the non-magnetic level on the level block and confirm that the level bubble is centered between the lines. If not, loosen the four screws and level the base plate position.
    Figure 18. Leveling the front base plate
  10. Move out the body coil slightly.
    Figure 19. Moving the body coil
Topic ID: id_SL15183055-1330661

Restoration

Procedure

  1. Restore the new body coil mount front assembly.
    Note: If the body coil was not replaced, reuse the original screw and washer.

    If the body coil is replaced, use the large glass laminate washers (5988407) and M6x30 screws (1000-M6C030-33) included in the body coil FRU.

    Figure 20. Attaching the front mount
  2. Restore the body coil to the original location.
    Figure 21. Installing the body coil
  3. Connect the front bracket to the base bracket.
    Figure 22. Securing the front end of the body coil
  4. Secure the body coil to the rear bracket with four M6 bolts and washers.
    Note: If the body coil is not replaced, reuse the same washers and screws which were originally used for fixing the rear of the body coil.

    If the body coil is replaced, use the large glass laminate washers (5988407) and M6x30 screws (1000-M6C030-33) which are included in body coil FRU.

    Figure 23. Securing the rear end of the body coil
  5. Perform RF body coil isolation. Refer to Body Coil Isolation.
  6. Reconnect the bore light cable connectors. (Front End: 2 connectors, Rear End: 2 cables)
    Figure 24. Reconnecting the rear bore light connections
    Figure 25. Reconnecting the front bore light connections
  7. Reconnect the bore light cable connectors. (Front End: 2 connectors, Rear End: 2 cables)
    Figure 26. Reconnecting the rear bore light connections
    Figure 27. Reconnecting the front bore light connections
  8. Restore the air flow sensors.
    Figure 28. Reconnecting the air flow sensors
  9. Restore the two (2) cooling air ducts at the rear end of the body coil.
    Figure 29. Reconnecting the cooling air ducts
  10. Reconnect the CH1 and CH2 drive cables to the RF body coil.
    Figure 30. Disconnecting the CH1 and CH2 drive cables
  11. If installed on this model, restore the 1-piece bridge. Refer to Installing the 1-piece bridge.
  12. Restore the rear end bell and the rest of the rear covers. Refer to Installing the rear endbell.
  13. Restore the front end bell and bridge. Refer to Installing the front endbell.
  14. Restore the dock interface cover.
    Figure 31. Dock interface cover
  15. Restore the right and left side covers.
    Figure 32. Right and left side covers
  16. Restore the patient table.
Topic ID: id_15771596

Finalization

Procedure

  1. Remove LOTO. Refer to Removing LOTO - ISC.
  2. Move the table up and restore the dock interface cover.
  3. Perform Dual Drive Quadrature Calibration. Refer to Dual drive quadrature tool.
  4. Perform the system performance test (SPT).