• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA30AED030GYZ
  • Topic ID: id_12374925 Version: 1.1
  • Date: Jul 5, 2019 10:03:32 PM

GOC Audio Assembly Replacement - New GOC

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1Not Applicable15 minutes30 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Phillips Screwdriver1---
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
GOC Audio Box1-

2395043 or 2395043-2

-
Table 4. Safety
Table 5. Required conditions
ConditionReferenceEffectivity

The host computer and the GOC audio assembly must be powered off.

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Procedure

  1. Perform LOTO on the PGR PDU/gradient subsystem. See the MR Service Safety Manual, PN 5452735.
  2. Note:

    The PDU must be powered down completely to prevent damage to system electronics.

    Remove the two screws that secure the right side panel, and lift the panel off to expose the GOC audio assembly (GOCAA).
    Figure 1. Exposing GOC Audio Assembly
    Note:

    Take care not to strain the short grounding lead that runs between the panel and the main chassis.

    Figure 2. Ground Lead
  3. Disconnect the power cord from the GOCAA.
    Figure 3. Disconnecting Power Cord and Cables
  4. Verify proper labeling before removing the cables connected to the GOCAA.
    Note:

    Make sure to note the cable locations for reattachment.

  5. Remove the four screws securing the audio box and remove it from the GOC frame.
  6. Install the replacement audio box. Replace the four screws and reconnect all cables.
  7. Reattach the GOC right side panel.

Finalization

  1. Remove LOTO from the PGR/PDU and apply power to the PDU. See the MR Service Safety Manual, PN 5452735.
  2. Perform Intercom Adjustment for the newly installed GOC audio box.
  3. Reboot the host computer.
  4. Perform a scan.