GEM replacements

1. Remove the patient table from the magnet room, and lock the wheels on the table to prevent it from moving.

2. Locate the front of the patient table and the buttons. Push the button labeled 1 (in the illustration below) down toward the floor while pushing the button labeled 2 in.

   

3. Continue pushing in both buttons, and pull the cradle toward you until a click is heard and the cradle stops moving.

   

4. Lift up on the center of the cradle, and pull the cradle toward you until the rear of the cradle clears the cradle guide rails.

   

5. Locate the rear of the cradle, remove the two inner screws with a Phillips screwdriver, and lift the plastic cradle cover out.

   

6. Lift the rear of the cradle, and remove the screw on the left and right side of the cradle.

   

7. Remove the upper two screws on the plastic pieces and rotate them as shown.

   

8. Remove the three center screws. Lift and remove the rear section of the cover from the cradle.

   

9. Remove the left and right strap rails by sliding each from the middle and front sections of the cradle. (To make it easier to remove the strap rails, release the cradle from the guide rails and lift it toward the back of the table.)

   

10. Lift up on the on the cradle and push it back into position.

    Notice
    	Before performing the next task, make sure the surface is clear of all materials such as any screws, tools or plastic parts previously removed.

11. Remove the cradle cover by lifting up and sliding the cover out from the front of the cradle.

    

12. Remove the shoulder screw and the 4 screws securing the 2 end ribs to the cradle (one near the front and one near the rear section of the cradle.)

    

    

13. Remove the six screws from the PA coil or PA filler. Carefully move the filler enough to clear access to the cotton rod. Be careful not to strain the attached cables while moving the filler.

    

    

14. Flex the cotton rod at the middle section of the cradle. Carefully slide it out from the rear section of the cradle.

    Be careful not to break the 2 pins at the end of the cotton rod or lose any of the 4 compression springs. For more information about safe handling of the cotton rod, see Cotton Rod Replacement.

15. After the cotton rod is removed from the cradle, restore the PA coil or PA filler to its location in the center section of the cradle.

16. Unplug all system cables from the PA coil or PA filler. Remove the coil or filler from the cradle.

17. Restore the cotton rod into the cradle, leaving it loose at the rear section of the cradle. Do not restore the shoulder screw at this point.

18. Place the replacement PA coil or PA filler into the cradle, and orient so the cables face the end of the table.

    

19. With the cotton rod loose (move it to one side), connect the cables from the new PA coil or PA filler to the cables in the table. (The PA filler has only the J4 cable.) Ensure the spacer bracket is properly oriented.

    The PA coil or PA filler will rest on the side of the table while the cables are being connected.

    

20. When all the cables are connected (with the PA coil or PA filler resting on the side of the table), restore the 4 compression springs to the 2 pins at the end of the cotton rod.

21. Flex the cotton rod at the middle section of the cradle and reconnect to the rear section of the cradle. Install the shoulder screw.

22. Place the new (replacement) PA coil or PA filler into the cradle and orient it so the cables face the end of the table (labeled REAR).

23. Install the 2 end ribs with 2 screws each as shown in Figure 11.

24. Secure the PA coil or PA filler to the table with six screws as shown in Figure 12.

    Note:

    It may be necessary to use a screwdriver to perforate amber-tinted film over screw holes to permit reinstallation of screws to secure the coil. Do not remove film from the coil surface, because it prevents loose hardware from falling into the coil and causing damage to the internal electronic circuitry.

25. Place the cradle cover on the cradle, ensuring the front edge of the cover slides into the groove of the cradle’s front section, and lower the cover onto the cradle.

    

26. Locate the front of the patient table and the buttons. Push the button labeled 1 (in Figure 1) down toward the floor while pushing the button labeled 2 in.

27. Continue pushing in both buttons, and pull the cradle toward you until a click is heard and the cradle stops moving.

28. Lift up on the center of the cradle, and pull the cradle toward you until the rear of the cradle clears the cradle guide rails.

29. Reinstall the left and right strap rails by sliding from the middle and back sections. Ensure there is no gap between the strap rails and the cradle front section.

    

30. Reinstall the rear section cover housing, and secure it with the screws. Ensure the cradle cover slides into the groove of the cover housing.

    

31. Lift the rear of the cradle, and reinstall the screws on the left and right side of the cradle.

32. Reinstall the last cover with the two inner screws.

33. Lift up on the on the cradle and push it back into position.

    

Perform the following tests.

1. For replacement of the PA coil or PA filler: Run the dual drive quadrature toolDual drive quadrature tool to recalibrate the RF signal.

2. For replacement of the PA coil: Run the Multi-Coil Quality Assurance Tool to verify that the coil operates properly.

3. For replacement of the PA coil or PA filler: Run Doing a check scan.

1. Remove the six screws securing the cover over the system cable.

   

2. Locate the connector of the system cable. Pull up on the connector and remove the system cable from the housing.

   

3. Insert new system cable in the housing. Ensure the flat portion of the strain relief is placed in the bottom housing.

   

4. Ensure the serial number on the cover matches the serial number inside the coil. Place cover on the coil and ensure wires leading to the system cable connector are not pinched between the housings. Secure the cover to the coil with the screws removed in step one.

   

Run the MCQA Tool to verify the AA Coil operates properly.

1. Remove the anterior section of the HNU coil if connected.

   

   1. Position the posterior section of the coil to expose the bottom cover and screws.

   2. Remove the 16 screws from the bottom cover of the posterior section, and segregate the four shorter screws from the other screws.

      

2. Remove the RF connectors labeled J8, J2 and J11 by pulling each out in a horizontal direction.

   

3. Remove the single DC connector labeled J64, located in the bottom left corner, by using pliers and pulling straight up from the board.

   

4. Remove the twisted pair DC connector labeled J83 by pushing in on the clip and pulling the connector straight up from the board.

   

5. Remove the coil ID connector labeled J54, located under the board in the lower right corner, by pushing in on the clip and pulling downward on the connector.

   

6. Use the side cutters to cut the zip tie.

   

7. Remove the two screws holding the system cable to the clamp.

   

8. Place the new system cable on the HNU coil with the flat side of the strain relief facing up and the curved side facing down, and secure in the cable clamp with the screws just removed.

   

9. Reconnect the DC cable labeled J54 on the underside of the board, ensuring the clip is facing out prior to connecting. (A click will be heard when the connector is properly seated.)

10. Reconnect the single DC connector labeled J64.

    

11. Reconnect the twisted pair DC connector labeled J83, ensuring the clip of the connector is facing out. (A click is heard when the connector is properly seated.)

12. Reconnect the RF connectors labeled J8, J2 and J11 to the correct locations on the board as shown in Figure 27, and use a zip tie to secure the cables in this location.

13. Replace the posterior cover on the HNU coil, ensuring the cables are not pinched when the cover is placed on the coil.

    1. Secure the cover with the 16 screws removed earlier.

    2. Ensure the shortest screws are located away from the system cable, as shown in Figure 26.

Run the MCQA Tool to verify the HNU coil operates properly.

1. Position the PV coil to expose the screws on the posterior section of the coil, and remove the seven screws closest to the system cable. (Do not remove the eight screws opposite of the system cable.)

   

2. When removing the screw on the end, do not allow the latch catch to fall from the coil. Set it aside for use later in the procedure.

   

3. Rotate the PV coil to expose the anterior section of the coil. (The anterior cover should no longer be attached.)

4. Remove the DC connectors labeled J3 and J38 by pushing in on the clip and pulling the connectors straight up from the board.

   

5. Remove the RF connectors labeled J33, J34, J35, and J36 by pulling straight up from the board.

   

6. Place the new system cable on the PV coil, ensuring that the flat side of the strain relief is facing down, and reconnect the RF connectors labeled J33, J34, J35, and J36.

   

   Note:

   For systems with the RRx receive chain, replace with the PV system coil without balun.

   

7. Reconnect the DC connectors labeled J3 and J38, ensuring they are properly oriented before plugging them in. (A click is heard when the connectors are properly seated.)

8. Reinstall the anterior cover on the PV coil and secure with the six of the seven screws removed earlier.

9. Reinstall the latch catch and the seventh screw on the anterior cover. The post of the latch catch fits into the anterior section of the coil and can be positioned in one direction.

   

Run the MCQA Tool to verify the PV coil operates properly.

1. Position the second station of the PV coil to expose the screws. Remove the 13 screws on the main portion and the 8 screws from the hinge area. Separate the 8 screws from the hinge area because they are a different size.

   

   Note:

   Before lifting the second station, make sure to release the latch.

2. Remove the cover and locate the three latch screws and remove them.

   

3. Reinstall new latch and secure with the three screws removed in the previous step.

4. Reinstall the cover and secure with the all the screws removed earlier. Remember that the screws on the hinge area are smaller than those on the rest of the cover.

5. Position the PV coil to expose the screws on the posterior section of the coil. Remove the end screw, and detach the latch catch from the coil.

   

6. Install the new latch catch and secure with the end screw. (The post of the latch catch fits into the anterior of the coil and in one direction as shown in Figure 41.)

7. Run the MCQA Tool to verify the PV coil operates properly.