• Discovery MR750w and SIGNA™ Architect T 3.0T System Service Methods
  • 5690002-2EN Revision 4
  • Object ID: 00000018WIA30D8AE20GYZ
  • Topic ID: id_13105872 Version: 3.5
  • Date: Feb 6, 2020 1:58:19 PM

Room ambient and bore temperature sensors replacement

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1 person for each sensor replacement procedureNot Applicable5 hours for bore temperature sensor; 1 hour for room ambient temperature sensor15 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Digital Volt Meter (DVM)1---
Nonmagnetic Titanium Service Tool Kit, Large Set1-5112581-
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
Bore Temperature Cable and Sensor (Run 3350, MAG-SRI-J10 to Mag-Bore, Bore Temp Sensor)1-

See FRU Manual

-

About this task

Topic ID: id_SL1991687-1061576

Room ambient temperature sensor replacement

Procedure

  1. Apply LOTO on the RF amplifier and PEN cabinet. See the MR Service Safety Manual, PN 5452735.
  2. Remove the left side middle and left side front covers.

    See Side and Top Cover Removal and Installation.

    The room ambient temperature sensor is located behind the front cover.

    Figure 1. Room ambient air temperature sensor
Topic ID: id_SL1991695-1061576

Patient bore temperature sensor replacement

Procedure

  1. Perform LOTO on the RF amplifier and PEN cabinet. See the MR Service Safety Manual, PN 5452735.
  2. Remove the left side middle and left side front covers. See Side and Top Cover Removal and Installation.
  3. Remove the split bridge Bridge and Longitudinal Drive Belt Replacement.
  4. Remove the front end bell Front End Bell Removal and Install.
  5. Note: As long as the rear end bell is in place and the RF body coil is returned to the bore in the same orientation as it was removed, then RF coil tuning will not be affected. It may be necessary to mark the original body coil position.
    Partially remove the RF body coil RF body coil replacement .
  6. Carefully remove the tape located under the sensor. Keep the tape to reused it later.
  7. Pull the sensor from the RF body coil port.
  8. Remove the bore temperature sensor cable by threading it through the magnetic enclosure.
  9. Route the new cable through the magnet enclosure and tape it to the RF body coil at the 315 position. Reconnect the bore temperature sensor cable at J10 on the SRI under the left side of the magnet enclosure, and reconnect the room ambient temperature sensor cable.
    Figure 2. Bore temperature sensor cable
  10. Insert the bore temperature sensor into the port in the RF body coil and secure it with tape.
    Figure 3. RF body coil port
  11. Replace the RF body coil, front end bell, split bridge, and covers per Step 1 through Step 5 (above) in reverse order. Take care to not pinch the cable.
Topic ID: id_14998828

Finalization

Finalization

  1. Remove LOTO from the PEN cabinet. See the MR Service Safety Manual, PN 5452735.
  2. Perform a quick head and body scan to ensure that the system is functioning properly.