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Xserve
Logic Board
Replacement Instructions
Follow the instructions in this sheet carefully. Failure to follow these instructions could
damage your equipment and void its warranty.
Note: Online instructions covering customer-installable parts are available at
http://www.info.apple.com/installparts/.
Tools Required
The only tool required for this procedure is a Phillips screwdriver.
Opening the Server
The server slides open from the front of the rack. The top cover remains in p
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3. If the server is in the locked position (the yellow security LED on the front panel is on), use the Allen key that came with the server to unlock it. 4. If the cable management arm is not in use, unplug all external cables except the power cord. 5. Touch the server’s metal case to discharge any static electricity. Important: Always ground yourself by touching the server’s case before you touch any parts or install any components inside the server. To avoid static electricity bu
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8. Grasp the thumbscrews and slide the bottom housing forward part way to expose the two chassis levers. (Figure 2) 9. While depressing both levers, pull the bottom housing all the way forward and remove it from the rack. Figure 2 10. Place the bottom housing on a sturdy, flat surface and ESD mat. 11. Put on the ESD wrist strap. Xserve Logic Board - 3
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Removing the Installed Logic Board Note: The replacement logic board does not include memory DIMMs or expansion cards. You must transfer these parts from the current logic board. To remove the logic board, you must first remove: • memory DIMMs • PCI/AGP card risers • heatsink and processor • ATA controller board • power supply Memory DIMMs For each installed DIMM, do the following: 1. Push down the ejectors on the DIMM slot. (Figure 3) 2. Holding the DIMM by both top corners, lift
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Dual-Slot Riser 1. Release the thumb screw that secures the riser’s cards to the server. (Figure 4) 2. If there are latches on either side of the riser, lift them slightly to release the riser from the logic board. 3. Pull the riser a short distance to the side to disconnect it, and then tilt the riser and attached cards up so that the card ports clear the enclosure. Remove the riser and cards from the server. Figure 4 Single-Slot Riser 1. Release the thumb screw that secures
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2. Pull the clip on the riser forward to release the riser from the logic board connector. (Figure 6) 3. Disconnect the riser from the logic board and remove the riser and card from the server. Figure 6 Heatsink and Processor, Version 1 Note: There are two versions of the Xserve heatsink and processor. The first version includes a plastic duct that covers the heatsink. If there is no duct, skip to Version 2. 1. Release the latch on the heatsink duct from its slot, slide the duct
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3. Release the three captive screws that secure the heatsink. (Figure 8) 4. Lift the heatsink straight up and remove it from the server. Figure 8 5. Lift the processor straight up to disconnect it from the logic board. (Figure 9) 6. Remove the processor from the server. Figure 9 Xserve Logic Board - 7
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Heatsink and Processor, Version 2 1. Using a Phillips screwdriver, remove the three screws that mount the heatsink and processor to the logic board. (Figure 10) 2. Carefully lift the heatsink and processor straight up and out of the server. Figure 10 Note: The heatsink is part of the processor in Version 2; do not attempt to remove the heatsink from the processor. Xserve Logic Board - 8
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ATA Controller Board 1. If necessary, disconnect the blower cable near the ATA controller board. (Figure 11) 2. Press in on both ends of the clip securing the right side of the ATA controller board and remove the clip from the server. Repeat for the clip on the left side of the board. 3. Lift the ATA controller board straight up to disconnect it from the drive interconnect and logic boards and remove the board from the server. Figure 11 Xserve Logic Board - 9
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Power Supply 1. Release the locking latch on the power supply cable connector and disconnect the cable from the drive interconnect board. (Figure 12) 2. Release the thumbscrew that secures the power supply to the chassis. Note: The thumbscrew is captive; you cannot remove it. 3. Grasp the metal flange of the power supply’s connector (on the left side) and lift up to disconnect the power supply from the logic board. Note: You may need to loosen the left side of the power supply and
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Logic Board 1. Release the thumb screw that secures the logic board to the chassis. (Figure 13) 2. Move the logic board forward and up slightly to release it from the four mounting pegs. 3. Tilt up the end of the logic board nearest the blowers so that the board ports clear the chassis. 4. Remove the board from the server. Figure 13 Xserve Logic Board - 11
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Installing the Replacement Logic Board 1. If the heatsink thermal pad on the underside of the replacement logic board has protective film on it, remove the film. (Figure 14) Note: The protective film is a very thin layer on top of the thermal pad. Be careful to remove only the film, not the pad. Figure 14 2. Install the replacement logic board in the bottom housing, making sure the board fits over the four mounting pegs on the chassis floor. Important: Make sure the board’s connect
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Power Supply 1. Reconnect the power supply to the logic board. 2. Tighten the thumb screw that secures the power supply to the chassis. 3. Reconnect the power supply cable to the drive interconnect board. ATA Controller Board 1. Reconnect the ATA controller board to the drive interconnect and logic boards. Note: When replacing the ATA controller board, align it over the two pairs of connectors on the drive interconnect and logic boards, making sure the “MLB” arrow printed on
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3. Reconnect the blower cable, if you disconnected it earlier. Heatsink and Processor, Version 1 1. Position the processor over its logic board connector and press down, being careful not to touch any chips on the board or processor. 2. Using the alcohol pad included with the replacement logic board, clean off any used thermal grease from the processor MPU (Figure 18) and the bottom of the heatsink. Figure 18 3. Using the thermal grease included with the logic board, apply one dot
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6. To ensure the grease spreads evenly over the processor, lightly tighten the screws in the order indicated below. (FIgure 19) 7. Again tighten the screws in the order indicated to secure the heatsink. Figure 19 8. Replace the heatsink duct on the heatsink. Xserve Logic Board - 15
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Heatsink and Processor, Version 2 1. Insert the threaded end of one of the processor installation guides into the logic board standoff on the right side of the processor connector. Twist the guide until it screws into place. (Figure 20) 2. Insert the second processor installation guide into the standoff on the left side of the processor connector and twist until the guide screws into place. Figure 20 Xserve Logic Board - 16
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3. Carefully align the screw holes on the replacement heatsink and processor with the two guides, and lower the unit straight down over the guides until it touches the logic board. (Figure 21) 4. To secure the processor to the logic board, press down gently on the top of the heatsink cover in the area directly over the processor's connector. Figure 21 Xserve Logic Board - 17
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5. Remove the two installation guides. 6. Replace the three mounting screws and secure the processor and heatsink to the logic board. (Figure 22) Figure 22 PCI/AGP Card Risers and Memory DIMMs 1. Reconnect the dual- and single-slot risers to the logic board. 2. Reinstall any DIMMs in the logic board memory slots. Note: DIMMs are designed to fit into memory slots only one way. Be sure to align the notch in the DIMM with the small rib inside the slot. Xserve Logic Board - 18
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Battery Remove the battery insulator tab from the battery holder on the replacement logic board. (Figure 23) Figure 23 Note: Replacing the logic board in the server changes its Ethernet ID number. The new number is printed on an Ethernet ID label packaged with the replacement logic board. After installing the new logic board, cover the Ethernet ID number on the server’s back panel with the new ID label. Closing the Server 1. Carefully slide the bottom housing back into the rack. 2.
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