• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA30330450GYZ
  • Topic ID: id_2021406 Version: 2.1
  • Date: Oct 11, 2021 6:13:21 PM

Re-enabling VSWR fault detection in AMT amplifier

Re-enables AMT amplifier fault detection in the Multi-Nuclear Spectroscopy (MNS) cabinet.

Procedure

  1. Apply LOTO on the RF amplifier and PEN cabinet to remove power to the MNS amplifier. See the MR Service Safety Manual, PN 5452735.
  2. Remove the top panel of the MNS amplifier cabinet.
    Figure 1. Top panel of AMT MNS amplifier cabinet
  3. Reconnect the SMA cable connections to J7 and J8 on the controller module PCB.
    Figure 2. J7 and J8 on controller module PCB
  4. Replace the top cover of the controller module in the MNS amplifier cabinet.
    Figure 3. Top cover of controller module
  5. Replace the top panel of the MNS amplifier cabinet.
  6. Remove LOTO (see the MR Service Safety Manual, PN 5452735) and reapply power to the MNS amplifier.