Optima MR450w BASE 1.5T System Service Methods
5690012-2EN Revision 3
Object ID: 00000018WIA3047AE20GYZ
Topic ID: id_13107538 Version: 3.0
Date: Aug 29, 2019 1:34:36 AM

Operator Display and Control Panels Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	5 minutes	45 minutes	5 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Non-Magnetic Tool Kit	1	-	5112581	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
In-Room Display (option)	1	-	See FRU Manual	-
Trackball Control Panel (option)	1	-	See FRU Manual	-
E-Stop Panel	1	-	See FRU Manual	-
Push Button Control Panel (option)	1	-	See FRU Manual	-
7-Segment Display	1	-	See FRU Manual	-

Table 4. Safety

Warning

Possible Personal Injury!

This procedure requires removal of ferrous material in close proximity to the magnet.

Keep operator control panel away from front of the magnet bore.

About this task

This document provides the procedures for replacing operator control/display hardware in the front magnet enclosure. This document covers both the in-room display (IRD) version and the version without the IRD.

Replacing In-Room Display

Procedure

Perform LOTO on the PGR PDU/gradient subsystem. See the MR Service Safety Manual, PN 5452735.
Note:
The PDU must be powered down completely to prevent damage to system electronics.

Remove the laser light cover. It is held in place by two screws and a popper.

Figure 1. In-Room Display (IRD)

Figure 2. Removing Laser Light Cover
Remove top panel on back of the IRD by popping tabs with a small flat head screwdriver.

Figure 3. Removing IRD

Warning

Strong magnetic field!

eddy currents can cause resistance when pulling the IRD away from the magnet.

use caution when removing the ird to prevent it from striking the magnet enclosure.

Disconnect the three cables attached to the IRD (ground cable, fiber optic cable, and power cable).

Remove four Allen head screws connecting the bracket plate to the back of the IRD. Lift the monitor up and off the bracket carefully, because eddy currents may pull against it.
Mount the new IRD, reconnect the appropriate cables, and replace the covers.

Replacing Trackball Control Panels and E-Stop Button

Procedure

Perform LOTO on the PGR PDU/gradient subsystem. See the MR Service Safety Manual, PN 5452735.
Note:
The PDU must be powered down completely to prevent damage to system electronics.

Remove the front panels. See Front Cover Removal and Installation.

Figure 4. Removing Front Cover
Disconnect the two cables that connect the control panels to the magnet enclosure.

Note:
If cable connectors are not labeled with a J number, mark the applicable J number on each cable connector before removal.

Figure 5. Removing Control Panel Cables

Warning

Possible Personal Injury!

This procedure requires removal of ferrous material in close proximity to the magnet.

Keep operator control panel away from front of the magnet bore.

Remove the trackball control panel by removing five screws and detaching the emergency stop (e-stop) button cable.

Figure 6. Removing Trackball Control Panel

Note:

If you are only replacing the e-stop button board, disconnect the e-stop cable and remove two screws. Install the new button.

Notice

On the back of the control panel, the e-stop cable connection and the trackball cable connection are of the same size and gender, so they can be accidentally interchanged. Confirm that the cables are connected properly; otherwise, the e-stop circuit will not be resettable. See Figure 6 and Figure 7.

To install the new trackball control panel, follow Step 2 through Step 4 in reverse order.

Replacing 7-Segment Display (7SD)

Procedure

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

Note:
The PDU must be powered down completely to prevent damage to system electronics.
Remove the left trim ring. It is held in place by three poppers.
Remove the 7SD bezel. It is held in place by one screw and four poppers.

Figure 9. 7SD

Figure 10. Removing 7SD Bezel
After the bezel is removed from the electrical assembly, disconnect the safety tether.
Remove the four screws to remove the 7SD from the mounting bracket.

Figure 11. Removing 7SD

Warning

Strong magnetic field!

eddy currents can cause resistance when pulling the 7SD away from the magnet.

use caution when removing the 7SD to prevent it from striking the magnet enclosure.

Disconnect the two cables attached to the 7SD. The mounting bracket can be reused.

Mount the new 7SD and reconnect the appropriate cables and safety tether, and then replace the front bezel and trim rings.

Replacing Push Button (Non-Trackball) Control Panel and E-Stop Button

Procedure

Perform LOTO on the PGR PDU/gradient subsystem. See the MR Service Safety Manual, PN 5452735.
Remove the front covers. See Front Cover Removal and Installation.
Disconnect the cable that connects each control panel to the magnet enclosure.

Figure 12. Removing Front Covers

Note:
If cable connectors are not labeled with a J number, mark the applicable J number on each cable connector before removal.

Figure 13. Removing Control Panel Cables
Remove the 7SD Control Panel by removing five screws, and detaching the e-stop button cable.

Note:
If you are only replacing the e-stop panel, disconnect the e-stop cable, remove two screws, and install the new button.
To install the new 7SD control panel, follow Step 2 through Step 4 in reverse order.

Figure 14. EMO Reset on PDU

Finalization

Procedure

Remove LOTO from the PGR/PDU and power on the PDU. See the MR Service Safety Manual, PN 5452735.
Whenever the IRD or trackball control panels are disconnected and then reconnected, a TPS reset must be completed. (This is not necessary if the host computer is rebooted.)
Check the functionality of the item replaced. Run the associated diagnostic, if necessary.
- For the IRD: From the Common Service Desktop, select Diagnostics > Hardware Location > Magnet Room > In Room Display.
- For the control panel: From the Common Service Desktop, select Diagnostics > Hardware Location > Magnet Room > SRI Functional Tests.