Replacements
- System
- Gradient
- RF
- Coils
- Magnet Enclosure
- Patient Table
- Spectroscopy
  - 3.0T MNS Cabinet Component Replacements
  - Replacing CPC MNS amplifier components
    Describes the replacement procedures for the major components of the CPC cabinet.
  - MNS Exciter Replacement
    - Electrical Safety
      You must follow all recommended safety procedures when servicing and working near energy sources.
    - Shutting down the host computer
      Shutting down the host computer shuts down the system safely and turns off the power to the host computer.
    - Removing the MNS exciter
    - Installing the MNS exciter
    - Starting up the host computer
      How to start the host computer.
    - 8 kW 3.0T MNS amplifier calibration
  - MNS Upconverter Replacement

Discovery MR750 3.0T System Service Methods
5690009-2EN Revision 4
Object ID: 00000018WIA30501450GYZ
Topic ID: id_2021715 Version: 2.2
Date: Oct 11, 2021 6:20:13 PM

Removing the MNS exciter

Procedure

Perform LOTO on the RF amplifier and the PEN cabinet (magnet room electronics). See the MR Service Safety Manual, PN 5452735.
Remove the thumbscrews that secure the MNS exciter to the PEN cabinet.

Figure 1. MNS Exciter Cabinet
A CAN fiber-optic board (CFB)
B NB exciter board
C MNS BB exciter board
D Thumbscrews securing module to cabinet frame
Disconnect all the cables to the MNS exciter. Be sure to note cable locations.
Carefully slide the MNS exciter out of the PEN cabinet.