Sun Ultra 45 and Ultra 25 Workstations Service and Diagnostics Manual

This chapter describes the removal and installation procedures for the Sun Ultra 45 and Ultra 25 motherboard and associated components.

This chapter contains the following topics:

• Section 3.1, Motherboard Connector Overview
• Section 3.2, Replacing the DIMMs
• Section 3.3, Replacing the Battery
• Section 3.4, Replacing the NVRAM
• Section 3.5, Replacing the PCI Cards
• Section 3.6, Replacing the Motherboard

Caution - To prevent equipment damage, review the safety requirements, safety symbols, and safety precautions in Preparing to Replace Componentsbefore you perform any replacement procedure. Additional cautions, warnings, and instructions are provided in the Sun Ultra 45 and Ultra 25 Workstations Safety and Compliance Guide, 819-2785. The document is available from: http://www.sun.com/documentation/

Caution - When servicing or removing workstation components, attach an antistatic strap to your wrist and then to a metal area on the chassis. Then disconnect the power cord from the workstation and the wall receptacle. Following this caution equalizes all electrical potentials within the workstation.

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3.1 Motherboard Connector Overview

FIGURE 3-1 and FIGURE 3-2 show the connections for some cables and devices that connect to the motherboard.

FIGURE 3-1 Motherboard With Component Connections

FIGURE 3-2 Motherboard Cables and Cable Clips

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3.2 Replacing the DIMMs

This section describes removal and installation of the memory modules.

Caution - DIMM memory is installed in pairs. If you replace a single DIMM, the new DIMM must be identical to the DIMM that you removed.

Caution - Handle the DIMMs along the outside edges. Do nothandle the DIMM along the gold contact edge. Do not touch DIMM components or other metal parts. Always wear an antistatic wrist strap when handling DIMMs.

3.2.1 DIMM Configuration Rules

Sun Ultra 45 or Ultra 25 workstation memory is installed as matched pairs of DDR-1 SDRAM 266-MHz DIMMs. Within a matched pair, DIMMs must be identical. They must be from the same manufacturer with the same type and number of memory devices, the same amount of memory per device, and the same memory speed.

• The Sun Ultra 45 or Ultra 25 workstation requires a minimum of two matching DIMMs installed in CPU0 (FIGURE 3-3).
• DIMM connectors on the motherboard are color-coded blue and black. Beginning with CPU0, install DIMMS in pairs, either in the blue or in the black connectors.
• If you have four DIMMS and two CPUs, install two DIMMs for CPU0 and two for CPU1 for optimum performance (FIGURE 3-4).

When the workstation boots, the OpenBoot PROM checks for compatible memory modules. See OpenBoot PROM Memory Message for additional information.

Before replacing Sun Ultra 45 and Ultra 25 memory, verify that the latest versions of OpenBoot PROM, system firmware, and recommended system patches are installed on your system. If necessary, check the Sun System Handbook at SunSolve Online:
http://sunsolve.sun.com/handbook_pub/

FIGURE 3-3 DIMM Configurations for Single-CPU Workstations

FIGURE 3-4 DIMM Configurations for Ultra 45 Dual-CPU Workstations

3.2.2 OpenBoot PROM Memory Message

During workstation startup, OpenBoot PROM checks for DIMM type and DIMM manufacturer. TABLE 3-1 shows some checks and the actions taken by the OpenBoot PROM.

NOTICE - CPUx Banky DIMMs are incorrect type.

NOTICE - CPUx Banky DIMMs have different architectures and will not be used.

NOTICE - CPUx Banky DIMMs are from different vendors.

Each CPU has four memory slots. The two blue slots make up physical bank 0 and the two black slots make up physical bank 1 (FIGURE 3-4).

If a problem is found, OpenBoot PROM references memory by bank, for example:

NOTICE - CPU0 Bank 0 DIMMS are from different vendors.

The preceding message means that each of the two DIMMs in the bank 0 slots comes from a different manufacturer. The workstation still attempts to use the DIMMs.

NOTICE - CPU0 Bank 1 DIMMs have different architectures and will not be used.

This message means that each of the two DIMMs in the black slots has a different internal memory layout. The workstation does not use the DIMMs.

The workstation must have at least one functional pair of DIMMs to display a message. A workstation with more than one pair of DIMMs might display more than one message.

3.2.3 Removing the DIMMs

1. Power off the system and attach an antistatic wrist strap. Open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Release the DIMM by simultaneously pressing down on both ejector levers at the ends of the DIMM slot (FIGURE 3-5).

FIGURE 3-5 Releasing the DIMM

3. Lift the DIMM straight out of the DIMM slot (FIGURE 3-5).

Caution - Handle the DIMMs along the outside edges. Do not handle DIMMs along the gold edge. Do not touch DIMM components or other metal parts. Always wear an antistatic wrist strap when handling DIMMs.

Caution - Do not lift the DIMM out of the DIMM slot at an angle. This can damage the edge connector for the DIMM or the DIMM slot.

4. Set the DIMM aside on an antistatic mat.

5. Repeat Step 2 through Step 4 until you have removed all relevant DIMMs.

3.2.4 Installing the DIMMs

Caution - If you are installing additional memory, remember that DIMMs must be installed in matched pairs of DIMMs (FIGURE 3-4). The workstation requires a minimum of one pair of matching DIMMs.

The minimum OpenBoot Prom level for the Sun Ultra 45 or Ultra 25 workstations is OpenBoot 4.21.x. Before installing Sun Ultra 45 and Ultra 25 memory, verify that the latest versions of OpenBoot PROM, system firmware, and recommended system patches are installed on your system. If necessary, check the Sun System Handbook at SunSolve Online:
http://sunsolve.sun.com/handbook_pub/

Caution - Use proper ESD grounding techniques when handling components. Wear an antistatic wrist strap and use an antistatic mat. Store ESD-sensitive components in antistatic bags before placing them on any surface.

Caution - Do not remove any DIMM from its antistatic package until you are ready to install it.

1. Power off the system, attach an antistatic wrist strap, open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Remove the new DIMM from its antistatic container.

Caution - Handle DIMMs only by the edges. Do not touch DIMM components or metal parts. Always wear an antistatic wrist strap when handling DIMMs.

3. Review the recommended DIMM installation and configurations before installing the DIMM.

See Replacing the DIMMs.

4. Align the DIMM notch to the DIMM connector key (FIGURE 3-5).

5. Using both thumbs, press the DIMM straight down into the DIMM connector slot until both ejector levers close (FIGURE 3-5).

The DIMM is seated when you hear a click and the ejector levers are in the vertical position.

6. Repeat Step 4 through Step 5 until all DIMMs are installed.

7. Verify that all DIMM ejector levers are upright, seated, and tight.

8. Reassemble the workstation, power on the system, and verify the DIMM installation.

Refer to Reassembling the Workstation and Verifying Component Installation. You also might want to review the information in OpenBoot PROM Memory Message.

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3.3 Replacing the Battery

This section describes removal and installation of the battery. TABLE 3-2 lists the battery specifications.

3.3.1 Removing the Battery

1. Power off the system and attach an antistatic wrist strap. Open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Release the battery by pressing the battery clip away from the battery until the battery shifts out of the battery socket (FIGURE 3-6).

3. Remove the battery.

FIGURE 3-6 Removing and Installing the Battery

3.3.2 Installing the Battery

The battery fits directly into a socket on the motherboard. There are no additional fasteners or cables.

1. Position the battery over the battery socket with the plus (+) side up (FIGURE 3-6).

2. Press the battery down into the socket until the battery clicks into place.

3. Reassemble the workstation, power on the system, and verify the battery installation.

Refer to Finishing Component Replacement and Verifying Component Installation.

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3.4 Replacing the NVRAM

This section describes removal and installation of the nonvolatile random access memory (NVRAM).

3.4.1 Removing the NVRAM

1. Power off the system and attach an antistatic wrist strap. Open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Pull the NVRAM straight up from the motherboard connector (FIGURE 3-7).

FIGURE 3-7 Removing and Installing the NVRAM

3. Set the NVRAM aside on an antistatic mat.

3.4.2 Installing the NVRAM

The NVRAM installs directly onto the motherboard. There are no additional fasteners or cables.

1. Power off the system and attach an antistatic wrist strap. Open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Align the NVRAM key to the NVRAM connector key on the motherboard (FIGURE 3-7).

3. Press the NVRAM down into the connector.

4. Ensure that the NVRAM is tight in its connector.

5. If you are finished working, reassemble the workstation, power on the workstation, and verify the NVRAM installation.

Refer to Finishing Component Replacement and Verifying Component Installation.

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3.5 Replacing the PCI Cards

This section describes removal and installation of PCI cards in the workstation.

3.5.1 Identifying the PCI Cards

There are five PCI connectors on the system motherboard. Two connectors are PCI-X, and three connectors are PCI-Express (FIGURE 3-8). The long PCI-E connectors are x16 physical lanes long and operate at x8 lanes. The short PCI-E connector is x8 lanes long and operates at x4 lanes.

FIGURE 3-8 PCI Card Location and Identification

3.5.2 Removing a PCI Card

1. Power off the system and attach an antistatic wrist strap. If necessary, disconnect external cables. Open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Using a No. 2 Phillips screwdriver, remove the screw that secures the PCI card retainer to the chassis rear panel (FIGURE 3-9).

Set the screw aside in a container.

Caution - If you are removing a graphics accelerator from a PCI-Express connector, be sure that you release the PCI-E connector latch (FIGURE 3-9).

3. Gently rock the PCI card forward, then lift it straight out of the PCI card slot, and set it aside on an antistatic mat.

FIGURE 3-9 Removing the PCI Card

4. If you are not installing another PCI card in the empty slot, insert a filler panel into the rear panel slot.

The rear panel slot must be closed with a filler panel to meet system Electromagnetic Interference (EMI) and airflow requirements.

3.5.3 General PCI Card Guidelines

The total power consumption of all installed PCI cards must not exceed 400 Watts.

3.5.4 Installation Considerations for Graphics Accelerators

PCI-E 2 is the default console display. If there is no graphics accelerator installed into PCI-E 2, consider the probe order shown in TABLE 3-3.

3.5.4.1 Default Console Display

During the boot sequence, device nodes are probed. The PCI slots are probed in the order described in TABLE 3-3.

Unless you reconfigure the default, the first graphics accelerator occurring in the probe order is designated the default console display and assigned the aliases screen and /dev/fb.

3.5.4.2 Changing the Console Display

You can configure the OpenBoot PROM to designate a different graphics accelerator as the console display. Use the show-displays utility, the nvalias command, and the output-device parameter to make this change. For the following example, a Sun XVR-2500 graphics accelerator is installed in physical slot PCI-E 2 as the default console display and a Sun XVR-100 graphics accelerator is installed in slot PCI-X 0. This example configures the Sun XVR-100 graphics accelerator to be the new console display.

1. Obtain the ok prompt.

See Obtaining the ok Prompt.

2. Display the device nodes for the installed graphics accelerators.

For example:

ok show-displays

a) /pci@1f,700000/SUNW,XVR-2500@0

b) /pci@1e,600000/pci@0/pci@9/pci@0,2/SUNW,XVR-100@2

q) NO SELECTION

3. Select the graphics accelerator to be the new console display by typing its respective letter.

For example:

Enter Selection, q to quit: b

The utility ends and the device node path is loaded into a text buffer.

4. Make an alias for the device node path.

For example:

ok nvalias newconsoledisplay (Ctrl + Y)

Type a space, hold down the Control key, and press the Y key.

5. Configure the output-device parameter for the new console display.

For example:

ok setenv output-device newconsoledisplay

6. Reset the OpenBoot PROM:

ok reset-all

The system now uses the Sun XVR-100 graphics accelerator as the new console display.

3.5.5 Installing a PCI Card

1. Power off the system and attach an antistatic wrist strap. If necessary, disconnect external cables. Open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. Locate the available PCI card slots.

You might have to remove a second chassis filler panel for some PCI cards that use two PCI card slots. Read the documentation that came with the PCI card and see General PCI Card Guidelines.

FIGURE 3-10 Installing a PCI Card

3. Using a No. 2 Phillips screwdriver, remove the chassis filler panel from the PCI card slot and set the screw aside in a container (FIGURE 3-10).

Remove a second filler panel if needed for dual-width PCI cards.

4. Remove the new PCI card from its antistatic container.

Caution - Handle the PCI card along the outside edges. Do not handle the PCI card along the contact edge. If you are installing a long PCI-E card, be sure to engage the PCI-E connector latch.

5. Position the PCI card so that the PCI bracket aligns with the chassis rear panel slot and the PCI card edge aligns with the motherboard PCI card connector.

6. Insert the PCI card into the PCI card slot.

If you are installing a long PCI-Express card, be sure to engage the PCI-E connector latch (FIGURE 3-10).

7. Firmly press the PCI card straight down into the PCI card slot until it is fully seated in the slot.

8. Use a No. 2 Phillips screwdriver to fasten the screw that secures the PCI card retainer (FIGURE 3-10).

9. Inspect the PCI card fasteners to verify that:

• The PCI card panel slot screws are tight.
• The PCI cards are secure in the connectors.

10. If you are finished working, reassemble the workstation, power on the workstation, and verify the PCI card installation.

Refer to Finishing Component Replacement.

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3.6 Replacing the Motherboard

This section describes removal and installation of the motherboard.

Caution - This procedure is intended for Sun authorized service providers only.

3.6.1 Removing the Motherboard

The motherboard, CPU, and NVRAM are a single replaceable unit.

1. Power off the system and attach an antistatic wrist strap. Disconnect all external cables; open and position the chassis, and remove the access panel.

Refer to Powering Off the Workstation.

2. If necessary, remove the PCI cards and DIMMs (FIGURE 3-11).

Refer to:

• Removing the DIMMs
• Removing a PCI Card

Set these components onto an antistatic mat (FIGURE 3-11).

3. Remove the fan tray.

4. (Optional) If you want to use the same Ethernet address and system ID for the new motherboard, remove the NVRAM and place it on an antistatic mat.

Refer to Removing the NVRAM.

5. Remove all cables from the cable clips (FIGURE 3-11).

FIGURE 3-11 Removing Components from the Motherboard

6. Disconnect the following power and signal cables from the motherboard (FIGURE 3-12):

• I/O module signal and power cable at connector J3
• I/O module USB cable at connector J36
• DVD-dual drive cable at connector J11
• Fan tray backplane cable at connector J20
• Power supply cables at connectors J22, J28, J45 (P1, P2, and P5)
• Hard drive signal cable connector J42

FIGURE 3-12 Disconnecting Motherboard Cables

7. Turn the motherboard latch 90 degrees counterclockwise (FIGURE 3-13).

FIGURE 3-13 Releasing the Motherboard Latch

8. Move the cables out of the way.

9. Using the motherboard handles, tilt the motherboard to one side and lift it until it is free of the chassis (FIGURE 3-13).

10. Set the motherboard down onto the antistatic mat.

3.6.2 Installing the Motherboard

1. Remove the new motherboard from its antistatic package and place it on an antistatic mat.

2. Move all cables out of the way.

3. Align the motherboard rear panel connectors with the matching holes in the rear panel (FIGURE 3-13).

4. Gently lower the motherboard while tilting it down (FIGURE 3-13).

5. Align the motherboard so that the hooks fit into the holes of the motherboard tray.

6. Turn the motherboard latch 90 degrees clockwise to secure the motherboard.

Ensure that the motherboard connector panel aligns with the chassis rear panel.

7. Connect the cables to the corresponding motherboard connectors (FIGURE 3-14):

• I/O module signal and power cable at connector J3
• I/O module USB cable at connector J36
• DVD-dual drive connector at J11
• Fan tray backplane cable at connector J20
• Power supply cables at connectors J22, J28, and J45 (P1, P2, and P5)
• Hard drive signal cable connector J42

FIGURE 3-14 Reconnecting Cables to the Motherboard

8. Secure the cables into the cable clips (FIGURE 3-14).

9. If necessary, install the old NVRAM onto the new motherboard (FIGURE 3-15).

Refer to Replacing the NVRAM.

10. Install the PCI cards and the DIMMs.

Refer to:

• Installing a PCI Card
• Replacing the DIMMs

11. Inspect the motherboard to verify that:

• Cable connections are tight and cable clips are secured.
• DIMMs are properly installed.
• NVRAM is tight in the socket.
• PCI cards are properly seated and secured.

12. Reassemble the workstation, power on the system, and verify the motherboard installation.

Refer to Finishing Component Replacement.

FIGURE 3-15 Installing the Motherboard and Related Components

Sun Ultra 45 and Ultra 25 Workstations Service and Diagnostics Manual

819-1892

Copyright © 2006, Sun Microsystems, Inc. All Rights Reserved.