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Replacements
Magnet Enclosure and Outer Electronics
Replacing the heat exchanger temperature sensor
Follow this procedure to replace the heat exchanger temperature sensor.
Removing the heat exchanger temperature sensor
Removes the temperature sensor from the heat exchanger.

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.
    - 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 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 heat exchanger temperature sensor
      Removes the temperature sensor from the heat exchanger.
    - Installing the heat exchanger temperature sensor
    - 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.
    - 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.
    - 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 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.
  - 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: 00000018WIA30B80810GYZ
Topic ID: id_2005722 Version: 1.5
Date: Jul 4, 2019 8:42:32 PM

Removing the heat exchanger temperature sensor

Prerequisites


Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	10 minutes	-


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

Procedure

Disconnect the cable connector from the heat exchanger temperature sensor.

Notice

Component damage

The heat exchanger temperature sensor cable is highly susceptible to damage.

Use caution when connecting, disconnecting, or working around the heat exchanger temperature sensor cable.

Figure 1. Temperature sensor connector

Remove the heat exchanger temperature sensor as follows:
1. Remove the plastic clip securing the temperature sensor to the heat exchanger.
2. Remove the temperature sensor from the heat exchanger.
  
  Note: Make sure that the o-ring is with the temperature sensor. Retain the o-ring for installation of the new FRU.
Figure 2. Temperature sensor and clip
1 Heat exchanger temperature sensor
2 Temperature sensor retaining clip