Removing the SAN Volume Controller 2145-8G4 system board

You must remove the system board if you are instructed to replace the SAN Volume Controller 2145-8G4 system board FRU.

The system board field-replaceable unit (FRU) consists of the planar. You must order alcohol wipes and thermal grease separately. There are two versions of the SAN Volume Controller 2145-8G4. The original version (Rev 1) has two microprocessors and eight 1 GB memory modules. The second version (Rev 2) has one microprocessor and four 2 GB memory modules.

Before you proceed with the system board removal, ensure that you do the following:

Identify and label all the cables that are attached to the SAN Volume Controller 2145-8G4 node so they can be replaced in the same port.
Have a static-protected surface available to hold the components that you removed from the old system board.

You must follow all standard safety and handling instructions. The components that you will be handling are electrostatic-discharge sensitive. Take precautions to avoid damage from static electricity. Wear an anti-static wrist strap and use a static-protected mat or surface. For more information, see Handling static-sensitive devices.

Notes:

All left or right observations are when you are looking at the front of the unit.
You must remove a number of components before you can remove and replace the system board. You will reuse all the components that are removed with the new system board. Therefore, take care when you remove and store these components.

Perform the following steps to remove the system board:

Ensure that the node is turned off. If the node is an active member of a cluster, you must take care not to turn off the only node servicing one or more VDisks, because the host applications will lose access to their data. See MAP 5350: Powering off a SAN Volume Controller node for more information.
Remove the node from the rack and place it on a flat, static-protective surface. See Removing the SAN Volume Controller from a rack.
Remove the top cover. See Removing the top cover.
Remove the fibre-channel adapter and riser card in slot 1. Set the adapter and riser card aside on the static-protected surface. See Removing the fibre-channel adapter assembly.
Remove the riser card in slot 2.
Disconnect the first set of cables from the system board, which are shown in Figure 1. From the left front side of the system board, remove the following:
1. The right disk signal cable connector .
2. The left disk signal cable connector .
3. The fan 1 connector . To remove the fan connectors, press the release latch in the center and then pull up.
4. The fan 2 connector .
Figure 1. Connectors on the SAN Volume Controller 2145-8G4 system board
To ease other tasks, remove fan 2.
Notice how the cables are arranged within and beside the left air baffle . Then remove the left air baffle by pulling up gently.
Figure 2. Left air baffle on the SAN Volume Controller 2145-8G4
Disconnect the connectors from the system board, which are shown in Figure 3. From the right front side of the system board, remove the following:
1. The fan 3 connector by pressing the release latch in the center and then pulling up.
2. The fan 4 connector by pressing the release latch in the center and then pulling up.
3. The fan 5 connector by pressing the release latch in the center and then pulling up.
4. The fan 6 connector by pressing the release latch in the center and then pulling up.
5. The uninterruptible power supply cable connector .
6. The video cable connector .
Figure 3. Connectors on the right front side of the SAN Volume Controller 2145-8G4 system board
Remove the remaining cables from the system board:
1. The CD-RW ribbon cable connector by gently pulling the connector upward.
2. The light path ribbon cable connector by gently pulling the connector upward.
All cables should now have been removed from the system board. You do not need to disconnect the disk power cable connector on the power backplane , which are shown in Figure 4.
Figure 4. Disk power cable connector and power backplane on the SAN Volume Controller 2145-8G4 system board
Remove the right air baffle, which is shown in Figure 5. First, pull the air baffle to the right and then push the connector towards the back of the unit to release it from the support rail. Next, pull the baffle forward and then upward to release the clip from the system board. Finally, lift the baffle free.
Figure 5. Right air baffle on the SAN Volume Controller 2145-8G4 system board
Carefully remove all the memory modules and set them aside on the static-protected surface. See Removing the memory modules (DIMM).
Depending on the version of the SAN Volume Controller 2145-8G4 node, you must remove either one or two heat sinks. Remove the thermal grease from the heat sink, and set it aside on the static-protected surface.
Tip: Fully loosen both screws from one side of the heat sink before you loosen either screw on the other side to help break the thermal grease seal between the microprocessor and the heat sink.
Use an alcohol wipe to remove the thermal grease from the heat sink.
Clean the thermal grease from the top of each microprocessor with an alcohol wipe, as shown in Figure 6. Cleaning the microprocessor before it is removed reduces the amount of handling it is subjected to.
Figure 6. Removing thermal grease from the SAN Volume Controller 2145-8G4 microprocessor
Remove the microprocessors.
1. Open the microprocessor release lever and then open the bracket frame.
2. Carefully remove the microprocessor from the socket. Be careful to touch only the edges of the microprocessor.
3. Set the microprocessors aside on a static-protected surface.
Push down the orange clip and pull the power supply approximately two inches out of the chassis so it disconnects with the power backplane.
Disconnect the power backplane from the system board by sliding it to the left. Move it far enough to the side so it does not obstruct the system board removal. See Removing the power backplane.
Remove the four stand-off screws from by the serial and video I/O ports at the rear of the node. Figure 7 shows the location of the stand-off screws.
Figure 7. Serial and video ports on the SAN Volume Controller 2145-8G4
Remove the six screws on the system board, as shown in Figure 8, that secure the system board to the chassis.
Figure 8. The placement of the screws that secure the SAN Volume Controller 2145-8G4 system board
Lift up the front edge of the system board slightly so that it disengages from the locator pin. Slide the system board slightly toward the front of the node so that the I/O ports are free of the chassis.
Lift up the left side of the system board.
Lift up the rest of the system board and carefully remove it from the node, being careful not to disturb any surrounding components.
Figure 9. SAN Volume Controller 2145-8G4 system board