Discovery MR750 3.0T System Service Methods
5690009-2EN Revision 4
Object ID: 00000018WIA30DBF030GYZ
Topic ID: id_12374011 Version: 2.1
Date: Oct 11, 2021 3:47:41 PM

MNS Exciter Replacement

Prerequisites


Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	20 hours	-


Tools and test equipment
Item	Quantity	Part number	Manufacturer
Standard Hand Tools	1	-	-


Replacement parts
Item	Quantity	Part number	Manufacturer
MNS Exciter	1	See 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.

DANGER

Fatal electric shock hazard

Hazardous voltage is present throughout the cabinet when it is energized.

To prevent fatal electric shock, disconnect power and do lockout/tagout on the Power Distribution Unit (PDU) before beginning any work. See the MR Service Safety Manual (5452735).

Warning

Potential retinal burn

Invisible laser radiation may be emitted from disconnected fibers or connectors causing a retinal burn.

Avoid staring into beams or viewing directly with any optical instruments.

Reminders:

Always turn off laser sources before you inspect fiber connections.
Always keep a protective cap on unplugged fiber ferrules.

Notice

Potential component damage

Electrostatic discharge (ESD) can cause permanent damage to electronic components.

Observe the following ESD precautions:

Work on a static-free mat.
Wear a static strap to make sure that any accumulated electrostatic charge is discharged from your body to the ground.
Create a common ground for the equipment being worked on by connecting the static-free mat, static strap, and peripheral units to that piece of equipment.

Notice

Potential component damage

The SFP optical transceiver is very sensitive to electrostatic discharge (ESD), dust, and body oil. When working with the SFP optical transceiver:

Always use ESD protection when handling the SFP optical transceiver to prevent early failure.
Never touch the SFP optical transceiver without being properly grounded.
Never touch the end face of the optical connectors.
Never re-use lens tissue or cleaning swabs.
Always keep a protective cap on unplugged fiber connections.
Always inspect the connection before cleaning.
The SFP must be shipped in antistatic packaging. Discard any SFP shipped or stored without proper ESD protection.
Some SFPs are shipped in insulated envelopes which can produce excessive contaminates. Do not open these containers in the area where you will be working with the SFP. Remove the antistatic bag containing the SFP and move to a clean area to work.

About this task

Overview

This procedure describes how to replace the MNS exciter located in the 3.0T PEN cabinet.