Discovery MR750 3.0T System Service Methods
5690009-2EN Revision 4
Object ID: 00000018WIA30565E20GYZ
Topic ID: id_13106463 Version: 4.0
Date: Feb 14, 2020 4:01:04 PM

ICN Replacement (Dell R620, Dell R630, Sun 4100, 4170, or 4170 M2)

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
2	10 minutes	30 minutes per ICN	30 minutes

Table 2. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
Dell R620 – Image Compute Node (ICN) (Requires minimum software release of 25)	1	-	Refer to FRU Manual	-
Dell R630 – Image Compute Node (ICN) (Requires minimum software release of 25.1 M4)	1	-	Refer to FRU Manual	-
Sun 4100 – Image Compute Node (ICN)	1 or as required	-	Refer to FRU Manual	-
Sun 4170 – Image Compute Node (ICN)	1	-	Refer to FRU Manual	-
Sun 4170 M2 – Image Compute Node (ICN) (Requires minimum software release of 22.1)	1	-	Refer to FRU Manual	-
4170 ICN Hardware FRU Kit	1	-	Refer to FRU Manual	-

Table 3. Safety

Warning

Electrocution Hazard!

Dangerous voltages are present throughout the System Cabinet when Power is applied.

Follow the lockout and tagout (LOTO) requirements. See the “MR Service Safety Manual,” PN 5452735.

Warning

Laser Radiation Hazard!

Invisible laser radiation can be emitted from disconnected fiber-optic cables or connectors.

Do not stare into the beam, point the cable or connector ends at your eyes, or view through optical instruments.

CAUTION

Possible personal injury!

The Dell R620 and Sun 4170 ICNs weigh approximately 40 pounds (18 kg) each.

Use discretion to decide if two people should move this object. Considerations when moving this object:

Does the weight of the object present a physical limitation?

Is the object in an inconvenient position?

Does the object or moving path have sharp or rough edges?

Will the object be awkward to move due to bulk or any other reason?

Is the object fragile or one that contains fragile pieces?

Does the object have secure grips for moving?

Notice

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

Observe the following ESD precautions:

Wear a static wrist strap to ensure 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 wrist strap, and peripheral units to that piece of equipment.

Notice

The SFP optical transceiver is very sensitive to ESD. SFP latent failures can occur, in dry climates or low relative humidity, surpassing their ESD protection.

Contaminant failures can occur in SFP optics and exposed glass Rx and Tx cable ends. Do not touch the exposed ends on fiber connectors. Leave the dust caps in place until you are ready to install the SFP module. Use the Fiber Optics Cleaning Kit to clean both the SFP and cable end every time they are replaced or swapped from one port to another, or when using a loopback.

When working with the SFP optical transceiver or SFP Loopback, also observe the following precautions:

Always use ESD protection when handling the SFP optical transceiver to prevent early failure.

Always keep a protective cap on unplugged fiber connections.

The SFP must be shipped in antistatic packaging. Discard any SFP shipped or stored without proper ESD protection.

For more information on handling and cleaning the SFP transceiver refer to Fiber Optic Cable Devices Installation and Replacement.

About this task

This procedure provides instructions to replace four types of Image Compute Nodes (ICNs): Dell R620/R630, Sun 4100, Sun 4170, and Sun 4170 M2. Also, upgrade instructions are provided for Sun 4100 to Sun 4170 and Sun 4100 to Sun 4170 M2.

For replacement instructions for Dell R620/R630, see Replacing Dell R620/R630 ICN.
For replacement instructions for Sun 4100, 4170, and 4170 M2, see Replacing Sun 4100 or Sun 4170 ICN.
For upgrade instructions from Sun 4100 to Sun 4170 or Sun 4100 to Sun 4170 M2, see Replacing ICN 4100 with 4170/4170 M2.

Note: To upgrade a Sun ICN, the 4170 ICN Hardware FRU Kit is required.

Note:

Refer to the following table to determine the appropriate Gen Type and compare this with the ICN part number at the site. Consult the FRU manual to order the correct replacement power supply or supplies.

Table 4. ICN Types and Series
ICN Type	Part Number Series
R620 (Gen 5)	5921000x
R630 (Gen 6)	5931000x

Topic ID: id_SL12189463-1057478

Replacing Dell R620/R630 ICN

Procedure

Notice

NEVER turn an ICN ON/OFF from the power button on the front. The ICNs have software running on disk drives that can be corrupted if not shut down properly.

Follow the procedure referenced below for removing power to ICN chassis. Failure to properly power down an ICN can result in premature ICN failure.

From the Common Service Desktop, turn off the ICN(s) ICN On/Off Procedure

Perform LOTO on the reconstruction equipment. See the MR Service Safety Manual, PN 5452735.
Locate the ICN in the PGR cabinet, located above the CAM chassis on the right side.

Figure 1. Locate Dell R620 in PGR Cabinet
On the front of the ICN, lift up on the locking tabs on the right side and the left side of the ICN.

Figure 2. Locking Tab on Left Side of Dell R620
Slide the ICN out of the cabinet until the stops are reached at the end of the slide rails.

Remove all connections from the rear of the ICN. Note the locations for reinstallation.

Confirm the Ethernet release tabs are completely pressed and released before the cables are removed.
Remove the AC power plug(s). Depending on configuration, this unit can have one or two power plugs.

Figure 3. Dell R620/R630 Rear View (with VRF)

Figure 4. Dell R630 Rear View (without VRF)

Locate the two release tabs on the slide rails. Press each release tab down so that the ICN can be slightly moved forward.

Figure 5. Slide Rails and Release Tabs
After sliding the ICN forward, lift the ICN up to release from the bracket.

There are four studs on each side of the ICN that fit into the rail.

Figure 6. Removing ICN from Rails
Place the old ICN out of the way in a safe area.
With the slide rails out, install the new ICN, lining up the studs on the ICN with the slots on the rails.
Slide the ICN back into the PGR cabinet.
Reconnect all the cables Figure 3.
Press the release tabs. Push the ICN into the PGR cabinet until the ICN is completely inside and the ICN is locked in place.
Proceed to Finalization.

Item	Description
1	VRF1 J1 dual VRF fiber
2	VRF1 J5 single clock fiber
3	VRF2 J5 single clock fiber
4	VRF2 J1 dual VRF fiber
5	Net management Ethernet connection
6	Serial port (not used)
7	Video port (not used)
8	USB ports (not used)
9	Net 1 and 2 Ethernet connections
10	PCIe (R630 only)

Topic ID: id_SL4844870-1057478

Replacing Sun 4100 or Sun 4170 ICN

Procedure

Notice

NEVER turn an ICN ON/OFF from the power button on the front. The ICNs have software running on disk drives that can be corrupted if not shut down properly.

Follow the procedure referenced below for removing power to ICN chassis. Failure to properly power down an ICN can result in premature ICN failure.

Locate the ICNs in the PGR cabinet, about 1/3 way from the top of the cabinet, above the CAM chassis, on the right side.

From the Common Service Desktop, switch the ICNs off ICN On/Off Procedure.
Perform LOTO on the reconstruction equipment. See the MR Service Safety Manual, PN 5452735.
On the front of the ICN, undo the thumbscrew on each side of the ICN to be removed/replaced.

Figure 9. Thumbscrews on ICN Front - 4100

Figure 10. Thumbscrews on ICN Front - 4170
After the thumbscrews are loose, slide the ICN until the stop is reached at the end of the slide rails.

Remove all connections from the rear of the ICN. Note the locations for reinstallation. Be sure that the Ethernet release tabs are completely pressed before the cables are removed. Remove both AC power plugs.

Figure 11. Infiniband and Ethernet Switch Connections - 4100

Figure 12. Fiber Optic and Ethernet Switch Connections - 4170

Table 5. ICN Wiring Matrix
Connection Item	ICN 4170		ICN 4100
Connection Item	32-Channel	16-Channel	32-Channel	16-Channel
Power cords	2	2	4	2
Ethernet	3	3	6	3
Duplex fiber optic	2	1	2	1
Single fiber optic	2	1	2	1
Infiniband jumper	N/A	N/A	1	N/A
Fiber optic jumper	N/A	N/A	1	N/A

Figure 13. Ethernet and Fiber Optic Connections

Locate the two release tabs on the slide rails. Press each release tab toward the center of the ICN, and pull the ICN forward until the rails release and the ICN is free. Place the ICN being replaced to the side in a safe area.

Figure 14. ICN Slide Rails and Release Tabs
Push the slide rails back into the cabinet before inserting the ICN.

If upgrading from a 4100 to a 4170 model, proceed to Replacing ICN 4100 with 4170/4170 M2.

Otherwise, transfer each inner slide to the sides of the new ICN module.
Insert the new ICN into the PGR cabinet. Slide the ICN out until the stop is reached at the end of the slide rails. Make sure release tabs are engaged.
Connect all the cables back in a reverse operation.
Press the release tabs. Push the ICN into the PGR cabinet until the ICN is completely inside.
Attach the thumbscrews to the front of the ICN to secure the ICN into the cabinet.

Topic ID: id_SL4844871-1057478

Replacing ICN 4100 with 4170/4170 M2

About this task

If a Sun 4100 is being replaced with a 4170 or 4170 M2 ICN, the module(s), the attaching brackets, and slides are removed. New brackets, slides, and ICN are installed.

Topic ID: id_SL4844927-1057478

Removing Sun 4100 ICN(s)

Procedure

Notice

NEVER turn an ICN ON/OFF from the power button on the front. The ICNs have software running on disk drives that can be corrupted if not shut down properly.

Follow the procedure referenced below for removing power to ICN chassis. Failure to properly power down an ICN can result in premature ICN failure.

Locate the ICN 4100 in the PGR cabinet.

From the Common Service Desktop, switch the ICNs off (see ICN On/Off Procedure).
Perform LOTO on the reconstruction equipment. See the MR Service Safety Manual, PN 5452735.
Loosen the thumbscrews on each side of the ICN.

Figure 16. Thumbscrews Holding Sun 4100 ICN
Slide out the ICN until the stop is reached at the end of the side rails.
Remove all the connections at the back of the ICN.

Figure 17. Cable Connections on Sun 4100 ICN
Locate the two release tabs on the slide rails. Press both release tabs toward the center of the ICN while pulling the ICN forward. Pull the ICN forward until the rails release and the ICN is free. Place the ICN to the side in a safe area.

Figure 18. Slide Rails and Release Tab
Remove the ICN trays from the ICN mounting brackets.

Figure 19. Sun 4100 ICN Trays
Remove the screws securing each mounting bracket for the ICN.
Unfasten and save the M6 nuts that attach the slide to the bracket. Store in a safe place. They will be reused to attach the new slides to the new brackets.

Figure 20. Side Mounting Brackets for 4100

Topic ID: id_SL4844936-1057478

Installing Brackets for 4170 M2 Models

Procedure

Loosen the mounting screws for the network switch. Slide the switch down to give access to the mounting location for the slide rails for the 4170 ICN.

Figure 21. Mounting Rails for 4170 ICN
On each slide (5374804), remove the inner slide so that you can attach them to the sides of the ICN module.

Figure 22. Fastening Slide to ICN
Attach the slides to the fixed support bracket (5374805) and inside support bracket (5374806) with the M6 nuts previously removed.
Attach the inside support bracket to the outside support bracket (5374807) using M4 screws (2109866-3) and washers (46-328431P1). See Figure 21.
Attach the slide rails for the ICN 4170 module to the mounting rails in the PGR cabinet using four M5 screws on each bracket.
After brackets are secured, pull the slides forward to install the new ICN module.
Attach each inner slide to the sides of the new ICN module.
Push the slide rails back into the cabinet before inserting the ICN.
Insert the new ICN into the PGR cabinet. Slide the ICN out until the stop is reached at the end of the slide rails. Make sure release tabs are engaged.
Connect all the cables back in a reverse operation.
Press the release tabs. Push the ICN into the PGR cabinet until the ICN is completely inside.
Attach the thumbscrews to the front of the ICN to secure it in the cabinet.

Topic ID: id_14968479

Finalization

Remove LOTO from the reconstruction equipment. See the MR Service Safety Manual, PN 5452735.
Turn the ICNs on per ICN On/Off Procedure.

Note: For the first 3 or 4 minutes, LEDs come on only at the rear of the ICN, next to the power cables. After 3 to 4 minutes, you will hear the ICN fans come on and then the LED at the front of the ICN starts flashing.
Configure the new ICN VRE configuration and reconfiguration.
Perform a test scan to ensure the system is working properly.