• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA3045C030GYZ
  • Topic ID: id_12373463 Version: 1.3
  • Date: Jul 5, 2019 6:08:29 PM

3.0T RF Attenuator (Dummy Load) Replacement

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1Not Applicable20 minutes20 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Non-magnetic Allen Wrench Set1---
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
3.0T RF Attenuator (Dummy Load)1-

5270156

-
Topic ID: id_SL2005558-1061940

Removing 3.0T RF Attenuator

Procedure

  1. Perform LOTO on the PDM – RF power on the PDU. See the MR Service Safety Manual, PN 5452735.
  2. Remove the side covers from the rear pedestal.
  3. Remove cables J12, J13, and J14 from the bottom of the 3.0T RF attenuator.
  4. Remove the six Allen screws from the rear of the 3.0T RF attenuator.
    Figure 1. Remove Allen Screws
Topic ID: id_SL2005561-1061940

Installing 3.0T RF Attenuator

Procedure

  1. Mount the 3.0T RF attenuator to the rear pedestal.
  2. Tighten the six Allen screws to secure it. See Figure 1.
  3. Reattach cables J12, J13, and J14 to the bottom of the 3.0T RF attenuator.
Topic ID: id_15185307

Finalization

Procedure

  1. Replace the side covers on the rear pedestal.
  2. Remove LOTO from the PDM - RF power on the PDU. See the MR Service Safety Manual, PN 5452735.
  3. Complete the UPM Quad calibration.
  4. Perform scan to check system performance.