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Replacements
Magnet Enclosure and Outer Electronics
Replacing the ambient temperature sensor
Replacing an ambient temperature sensor is a complex process, which includes tasks to fulfill the required conditions as well as tasks for finalizing the installation after replacing the sensor.

Replacements
- Operator Workspace
- ISC (Integrated System Cabinet)
- ICC (Integrated Cooling Cabinet)
- Magnet Enclosure and Outer Electronics
  - Removing and installing the magnet enclosure covers
    Provides removal and installation instruction for all magnet enclosure covers.
  - Replacing the front endbell
    Removes the front endbell and installs a replacement endbell.
  - Replacing the rear endbell
    Removes the rear endbell and installs a replacement rear endbell.
  - Replacing the 1-piece bridge
    Replace the 1-piece bridge assembly.
  - Replacing the Dual Drive Transmit Receive Switch (DTRSW) and two-channel preamp
    Removal and installation instructions for replacing the Dual Drive Transmit Receive Switch (DTRSW) and two-channel preamp in the magnet outer electronics.
  - Replacing the DS Digitized Per Pin Remote Receiver (DPP RRx)
    Removal and installation instructions for replacing the DS Digitized Per Pin Remote Receiver (DPP RRx) in the magnet outer electronics.
  - Replacing the DS Digitized Per Pin (DPP) Receiver Distributor (Rx Dist)
    Removal and installation instructions for replacing the DS Digitized Per Pin (DPP) Receiver Distributor (Rx Dist) in the magnet outer electronics.
  - Replacing the table interface assembly
    Removal and installation instructions for replacing the table interface (TIF) assembly in the magnet outer electronics.
  - Replacing the Operator Control Panel (OCP) and the In-Room Display (IRD)
  - Replacing the IRD fiber optic cables
    The procedure for replacing the IRD fiber optic USB and DP cables.
  - Replacing the speaker
    Removes the speaker in the rear endbell and installs a replacement speaker.
  - Replacing the laser bracket assembly
    This procedure provides steps to replace the laser bracket assembly.
  - Replacing the bore light
    Removes a bore light from the body coil and installs a replacement bore light.
  - Replacing the RF body coil air flow sensor
    Replace the RF body coil air flow sensor.
  - Replacing the heat exchanger temperature sensor
    Follow this procedure to replace the heat exchanger temperature sensor.
  - Replacing the GE Illuminated Logo
    Removes the illuminated GE logo from the magnet front cover and installs a replacement logo.
  - Replacing the ambient temperature sensor
    Replacing an ambient temperature sensor is a complex process, which includes tasks to fulfill the required conditions as well as tasks for finalizing the installation after replacing the sensor.
    - Removing the magnet rear trim ring
      Removes the rear trim ring from the rear endbell. The trim ring covers the bolts securing the magnet rear enclosures.
    - Removing the magnet rear cable cover
      Removes the rear cable cover from the magnet enclosure.
    - Removing the magnet service access trim
      Removes the service access trim. The trim panel covers the screws securing the front and rear service access panels.
    - Removing the magnet front service access panel
      Removes the front service access panel from the magnet to allow access to components mounted on the left-hand side of the magnet.
    - Removing the magnet rear service access panel
      Removes the rear service access panel from the magnet to allow access to components mounted on the left-hand side of the magnet.
    - Removing the magnet service access vent
      Removes the service access vent from the magnet enclosure allowing a ladder to stand close to the magnet on the left-hand side.
    - Removing the magnet upper service access panel
      Removes the upper service access panel allowing access to components mounted on top of the magnet.
    - Removing the magnet right-hand top cover
      Removes the cover from the top of the right-hand side of the magnet enclosure.
    - Removing the magnet left- and right-hand lower access panels
      Removes the left- or right-hand lower access panel from the magnet front cover.
    - Removing the rear bridge cover
      Removes the table rear bridge cover from the magnet enclosure.
    - Removing the rear bridge inner cover
      Removes the rear bridge inner cover from the magnet enclosure.
    - Removing the magnet right-hand bottom cover
      Removes the bottom cover from the right-hand side of the magnet.
    - 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.
    - Applying LOTO - ISC
      Apply LOTO to the Power Distribution Unit (PDU) when servicing this item in the Integrated System Cabinet (ISC). Applying LOTO ensures a safe environment when working on this part.
    - Removing the magnet right-hand center cover
      Removes the center cover from the right-hand side of the magnet.
    - Doing the ambient temperature sensor replacement
      After completing the tasks for the required conditions, replace the ambient temperature sensor.
    - Installing the magnet right-hand center cover
      Installs the center cover onto the right-hand side of the magnet.
    - Removing LOTO - ISC
      Removing locks and tags, and restoring power to the ISC (Integrated System Cabinet) Power Distribution Unit (PDU).
    - Starting up the host computer
      How to start the host computer.
    - Installing the magnet right-hand bottom cover
      Installs the bottom cover onto the right-hand side of the magnet.
    - Installing the rear bridge inner cover
      Installs the rear bridge inner cover onto the magnet enclosure.
    - Installing the rear bridge cover
      Installs the table rear bridge cover onto the magnet enclosure.
    - Installing the magnet left- and right-hand lower access panels
      Installs the left- or right-hand lower access panel onto the magnet front cover.
    - Installing the magnet right-hand top cover
      Installs the cover onto the top of the right-hand side of the magnet enclosure.
    - Installing the magnet upper service access panel
      Installs the upper service access panel. This panel covers components mounted on top of the magnet.
    - Installing the magnet service access vent
      Installs the service access vent onto the magnet enclosure.
    - Installing the magnet rear service access panel
      Installs the rear service access panel onto the magnet enclosure. This panel covers the components mounted on the left-hand side of the magnet.
    - Installing the magnet front service access panel
      Installs the front service access panel onto the magnet enclosure. This panel covers the components mounted on the left-hand side of the magnet.
    - Installing the magnet service access trim
      Installs the service access trim. The trim panel covers the screws securing the front and rear service access panels.
    - Installing the magnet rear cable cover
      Install the rear cable cover onto the magnet enclosure.
    - Installing the magnet rear trim ring
      Installs the rear trim ring onto the rear endbell.
    - Doing a check scan
      A check scan is done at the conclusion of many procedures. This functional check assures the unit is in good clinical working order.
  - Replacing the 1-pc bridge trim
  - Body Coil Gap Foam Replacement
  - Body Coil Mount and Base Plate (Front) Replacement
  - Body Coil Mount and Base Plate (Rear) Replacement
- Coil Replacement
- Patient Table
- MDP
- Pen Panel

SIGNA™ Hero 3.0T Service Methods
5852800-8EN Revision 1.0
Object ID: 00000018WHA30C672GYZ
Topic ID: id_2001610 Version: 2.2
Date: Jun 25, 2021 9:57:42 PM

Replacing the ambient temperature sensor

Prerequisites


Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
2	-	4 hours	-


Tools and test equipment
Item	Quantity	Part number	Manufacturer
Nonmagnetic Titanium Service Tool Kit, Small Set	1	5113258	-


Replacement parts
Item	Quantity	Part number	Manufacturer
Ambient temperature sensor	1	Refer to the FRU manual	-


Safety
Before working in any GE Healthcare MR suite or performing any GE Healthcare service procedure, you must: Have read and understood all hazard conditions and safety requirements in the latest revision of the GE Healthcare MR Service Safety Manual (5452735). Have successfully completed all relevant GE Healthcare Environmental Health and Safety (EHS) courses (or for non-GE employees, equivalent workplace training courses). Comply with all site-specific training and workplace safety requirements. If you have any safety concerns at any time, do not begin work or immediately stop work and move to a safe location. Immediately contact your supervisor or site safety officer for instructions on how to proceed.