SIGNA™ Hero 3.0T Service Methods
5852800-8EN Revision 1.0
Object ID: 00000018WIA306BB230GYZ
Topic ID: id_15667405 Version: 2.2
Date: Nov 8, 2021 1:26:22 AM

Removing the exciter

Prerequisites


Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	15 minutes	15 minutes


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

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.

Procedure

Open the ISC front covers.
Disconnect all connectors.
Remove 2 screws.

Figure 1. Remove screws and connectors
Pull the exciter half way forward.
Disconnect three connectors from the rear of the exciter.

Note: Systems with Direct Sampled DPP do not use the LO connector J30. Instead terminate the J30 connector with the Twinax 100 Ohm Terminator (part number 5758591)
Lift the exciter up slightly and pull it out.

Figure 2. Exciter removal