C H A P T E R 4 - Maintaining the Workstation

C H A P T E R 4

Maintaining the Workstation

This chapter provides instructions on how to add, replace and configure the components in the workstation after it is set up. The following sections are included in this chapter:

Section 4.1, Tools and Supplies Needed

Section 4.2, Installation Precautions

Section 4.3, Opening the Workstation

Section 4.4, Location of Components

Section 4.5, Component Replacement Procedures

4.1 Tools and Supplies Needed

Phillips screwdriver

Flat-head screwdriver

Antistatic wrist strap (shipped with every CRU)

4.2 Installation Precautions

Before removing the system's left-side access panel, read the following sections. These sections contain important ESD precautions, along with preinstallation and postinstallation instructions.

4.2.1 ESD Precautions

Electrostatic discharge (ESD) can damage your processor, disk drives, expansion boards, and other components. Always observe the following precautions before you install a system component:

Do not remove a component from its protective packaging until you are ready to install it.

Wear a wrist strap and attach it to the system chassis ground, or to any metal part of the system, before handling components.

Turn off the power button on the back of the chassis before removing or replacing any of the system components.

4.2.2 Preinstallation Instructions

Always perform the following steps before you install any component:

1. Turn off the system and all of the peripherals connected to it.

2. Turn off the power button on the back of the chassis and leave the AC power cord plugged in.

Caution - Failure to properly turn off the system before you start installing components can cause serious component damage.

Caution - Follow the ESD precautions described in Section 4.2.1, ESD Precautionswhen handling a system component.

3. Open the workstation.

See Section 4.3, Opening the Workstation, for the appropriate procedure for opening the workstation.

4.2.3 Postinstallation Instructions

Perform the following steps after installing a workstation component:

1. Ensure that all of the components are installed as described in the step-by-step instructions.

See Section 4.5, Component Replacement Procedures.

2. Reinstall any PCI cards or peripherals that you had previously removed.

See Section 4.5, Component Replacement Procedures.

3. Reinstall the system's left-side panel and front bezel.

See Section 4.3, Opening the Workstation.

4. Connect all external cables to the system.

5. Power on the system.

See Section 1.4.1, Powering On the Workstation.

Caution - If the left-side panel and hard disk drives were removed, do not operate the workstation for more than ten minutes. Improper cooling airflow might damage the system's components.

4.3 Opening the Workstation

Caution - Before you proceed, turn off your system and all of the peripherals connected to it. Refer to Section 4.2.2, Preinstallation Instructions.

4.3.1 Removing the Access Panel

You must remove the left-side access panel to gain access to the system's internal components.

1. Turn off the system and all of the peripherals connected to it.

2. Loosen the two captive thumbscrews located on the edge of the left-side panel closest to the back panel.

3. Slide the panel toward the back of the workstation. Tilt the top edge of the panel out and then up to remove it from the chassis.

FIGURE 4-1 Removing the Side Panel

Figure showing bezel removal.

4.3.2 Removing the Front Bezel

1. Remove the left-side access panel.

2. Loosen the four bezel tabs (see FIGURE 4-2).

Facing the left-front side of the bezel and starting with the topmost tab, carefully push each bezel-mounting tab about a millimeter and forward slightly.

As you do this, you can see the edge of the bezel nearest the tab move slightly away from the front of the chassis.

Caution - Be very careful when pulling the bezel away from the chassis. Applying too much force might cause the bezel to break.

FIGURE 4-2 Releasing the Bezel Tabs

Figure showing releasing of bezel tabs.

3. Release the bezel.

a. Move the left-front side of the bezel slightly forward, disengaging the left-side tabs from the chassis.

b. Gently shift the bezel to the left, releasing it from the right-front chassis hooks and the chassis (see FIGURE 4-3).

FIGURE 4-3 Removing the Bezel

Figure showing bezel removal.

c. Set the bezel aside.

4.4 Location of Components

See FIGURE 4-4 to locate components before performing the remove and replace procedures.

FIGURE 4-4 Sun Ultra 20 Workstation System Components

Figure showing the internal components of the workstation. The following table lists the components, numbered counter-clockwise, starting at the top left-hand corner as the system is staning upright.

TABLE 4-1 System Components
Label	Component	Label	Component
1	Power supply	6	4 PCI 33 Mhz slots
2	4 DIMM slots (DIMM 1 is closest to the CPU)	7	2 PCI Express x1 slots
3	System fan	8	DVD drive
4	Heatsink/fan/CPU	9	I/O board
5	PCI Express x16 graphics slot	10	Hard disk drives (HDD 1 is the top drive, HDD 2 is the bottom drive)

4.5 Component Replacement Procedures

The following sections contain instructions for components that can be replaced by customers and field service personnel.

The following procedures are for replacing customer-replaceable units (CRUs):

Section 4.5.1, Replacing or Adding Hard Disk Drives

Section 4.5.2, Replacing the SATA Backplane

Section 4.5.3, Replacing a DVD Drive

Section 4.5.4, Replacing or Adding DIMMs

Section 4.5.5, Replacing a PCI or Graphics Card

Section 4.5.6, Replacing the System Battery

Section 4.5.7, Replacing the System Fan

Section 4.5.8, Replacing the Power Supply

Section 4.5.9, Replacing the I/O Board Assembly

Section 4.5.10, Replacing System Cables

The following procedures should only be performed by trained field service technicians:

Section 4.5.11, Replacing a CPU

Section 4.5.12, Replacing the Motherboard

4.5.1 Replacing or Adding Hard Disk Drives

4.5.1.1 Removing a Hard Disk Drive

Note - The Sun Ultra 20 Workstation can accommodate up to two hard drives. If you are not removing an existing drive, proceed to Section 4.5.1.2, Installing a Hard Disk Drive.

To remove a hard disk drive:

1. Turn off the power button on the back panel and open the chassis.

2. Locate the hard drive to be removed.

3. Unlock the hard drive handle by pushing the button to the right until the handle pops out (see FIGURE 4-5).

FIGURE 4-5 Removing a Hard Drive

Figure showing direction arrows for unlocking hard drive handle and pulling the drive out of the system.

4. Disconnect the hard drive from the hard drive assembly by pulling the hard drive by the handle.

5. Set the hard drive aside on an antistatic mat.

6. Choose your next step:

If you removed the hard drive to replace it, proceed to Section 4.5.1.2, Installing a Hard Disk Drive, to install the new hard drive.

If you removed the hard drive and will not replace it at this time, replace the left-side access panel and power on the system.

4.5.1.2 Installing a Hard Disk Drive

To install a hard disk drive:

1. Turn off the power button on the back panel and open the chassis.

2. Remove the hard drive from its antistatic packaging.

3. Push the handle release button to the right until the hard drive handle pops open.

FIGURE 4-6 Installing a Hard Drive

Figure showing direction arrows for instsalling the hard drive in the system and locking hard drive handle.

4. Locate the hard drive assembly and hard drive assembly guides.

If you are installing a second hard drive, install it in the remaining free slot in the hard drive assembly. The boot hard drive must be installed in hard drive slot HDD1 (top). The second hard drive bay is hard drive slot HDD2 (bottom).

5. Align the hard drive with the hard drive assembly guides and slide the hard drive into the hard drive assembly until the hard drive handle begins to close.

6. Press the hard drive handle closed until it locks the hard drive in the hard drive assembly.

This seats the hard drive connector into the SATA backplane connector.

7. Inspect the hard drive and related component fasteners to verify the following:

The hard drive handle is locked.

The hard drive assembly is seated in the backplane connector.

8. Replace the left-side access panel.

4.5.2 Replacing the SATA Backplane

The SATA backplane is located behind the hard drive cage. The SATA backplane, the hard drives, and the hard drive bracket are collectively the hard drive assembly.

The hard drive assembly is installed in the hard drive bay. The hard drive power and interface cables connect to the hard drives through the SATA backplane.

This section describes removal and installation of the SATA backplane. Topics include:

Section 4.5.2.1, Removing the SATA Backplane

Section 4.5.2.2, Installing the SATA Backplane

4.5.2.1 Removing the SATA Backplane

To remove a SATA backplane:

1. Turn off the power button on the back panel open the chassis, and locate the SATA backplane (see FIGURE 4-7).

FIGURE 4-7 Location of the SATA Backplane

Figure showing location and components of the SATA backplane.

2. Remove all installed hard drives.

See Section 4.5.1.1, Removing a Hard Disk Drive.

3. Set the hard drive(s) on an antistatic mat.

4. Disconnect the cables (see FIGURE 4-8).

a. Disconnect the power cable from the SATA backplane.

b. Disconnect the SATA data cables from the SATA backplane.

c. Temporarily mark the cables to ensure proper orientation when replacing the part.

FIGURE 4-8 Removing the SATA Backplane

Figure showing removal of SATA cables and backplane from the workstation.

5. Unfasten the SATA backplane from the chassis (see FIGURE 4-8).

Using a No. 2 Phillips screwdriver, remove the four screws that secure the SATA backplane to the chassis. Set the screws aside in a container.

6. Slide the SATA backplane out of the hard drive bracket and set it aside.

7. Proceed to Section 4.5.2.2, Installing the SATA Backplane to install the new SATA backplane.

4.5.2.2 Installing the SATA Backplane

To install the SATA backplane:

1. Open the chassis.

2. Remove the new SATA backplane from its packaging.

3. Slide the SATA backplane under the hard drive bracket.

Position the screw holes over the holes in the chassis.

FIGURE 4-9 Installing the SATA Backplane

Figure showing installation of SATA cables and backplane into the system.

4. Fasten the SATA backplane to the hard drive bracket.

Using a No. 2 Phillips screwdriver, install the four screws that secure the SATA backplane to the hard drive bracket. Torque the screws to inch pounds.

5. Connect and route the cables (see FIGURE 4-9).

a. Connect the SATA interface cables to the SATA backplane connector.

b. Connect the power supply power cable to connector P4.

Refer to the cabling diagram in the service label on the side of the chassis for information on cable routing.

6. Slide the hard drive bracket into the hard drive bay until the latch clicks.

You are finished replacing the SATA backplane.

7. Install all hard drives into the hard drive bracket.

See Section 4.5.1.2, Installing a Hard Disk Drive.

8. Inspect the SATA backplane and the related component fasteners.

Be sure that the hard drive handles are flush and locked.

Be sure that the hard drives are seated the backplane connector.

9. Inspect the SATA backplane and the related component cabling.

Be sure that the power cable is seated in the SATA backplane.

Be sure that the SATA interface cable is seated in the SATA backplane connector.

Be sure that the interface cable is routed through the routing clip on the SATA backplane cover.

10. Replace the left-side panel of the workstation.

4.5.3 Replacing a DVD Drive

4.5.3.1 Removing a DVD Drive

To remove a DVD drive:

1. Remove any media in the DVD drive.

2. Turn off the power button on the back of the system and power off all of the peripherals connected to the workstation.

3. Remove the left-side access panel.

4. Remove the front bezel (see Section 4.3.2, Removing the Front Bezel).

5. Disconnect the cables from the back of the DVD drive.

6. Push the drive retaining lever tab up to release the lever from its retaining hooks (see FIGURE 4-10).

FIGURE 4-10 Removing the DVD Drive

Figure showing removal of the DVD drive from the workstation.

7. Gently pull out the DVD drive from the front of the chassis.

8. Place the DVD drive on a static-dissipating work surface or inside an anti-static bag.

9. Install the new DVD drive as shown in Section 4.5.3.2, Installing a DVD Drive.

4.5.3.2 Installing a DVD Drive

To install a DVD drive:

1. Remove the DVD drive from its packaging.

2. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

3. Remove the left-side access panel.

4. Slide the 5.25-inch drive with preinstalled carrier into the drive bay.

Ensure that the holes in the drive case are aligned with the holes in the chassis drive bay, from which the drive retaining lever pin was withdrawn.

FIGURE 4-11 Installing the DVD Drive

Figure showing the installation of the DVD drive into the workstation.

5. Lock the drive in the bay by rotating the drive retaining lever downward until the drive is captured by the retaining hooks.

6. Connect the IDE, power, and jumper cables to the back of the DVD drive (see FIGURE 4-12).

Refer to the cabling diagram in the service label on the side of the chassis for information on correct cable routing.

FIGURE 4-12 Location of Power and IDE Cables

Figure showing location of power and IDE cables.

7. Replace the front bezel and left-side cover of the workstation.

4.5.4 Replacing or Adding DIMMs

This section contains instructions for removing and installing a dual inline memory module (DIMM).

Caution - Before removing any DIMMs from the motherboard, create a backup file to preserve any important data.

4.5.4.1 Detecting Faulty DIMMs

To determine which DIMM modules are not functioning properly so that they can be replaced:

1. Boot the machine with the supplemental CD in the disk drive.

2. Run the PC-Check diagnostic tool that comes with the supplemental CD.

3. Choose option 1, hardware diagnostic tests.

4. Select advanced diagnostic tests; then select memory.

This shows all the system memory.

5. Ensure that all the memory tests are selected by selecting test set in the memory test menu.

All tests should be highlighted in yellow, with a dot to the left of each.

6. Exit the screen by pressing the Esc key.

7. Select test system memory.

This begins testing all the memory in the system. If a DIMM module is faulty, PC-Check indicates which one failed and highlights it in red.

8. Make a note of any failed DIMM modules.

9. Shut down the machine and switch off the AC power from the back.

10. To remove the faulty module and replace it with a new one, continue to Section 4.5.4.2, Removing a DIMM.

4.5.4.2 Removing a DIMM

To remove a DIMM:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Identify the location from which you will remove a DIMM (see FIGURE 4-13).

FIGURE 4-13 DIMM Locations

Figure showing location of the DIMMs in the workstation. The DIMM closest to the CPU is DIMM 1.

5. Place your forefingers on the top of the DIMM.

6. Remove the DIMM by pressing down on the ejector bars at both ends of the DIMM socket (FIGURE 4-14).

FIGURE 4-14 Removing a DIMM

Figure showing DIMM removal from the DIMM slot.

7. Set the DIMM aside on an antistatic mat.

8. Install a new DIMM as shown in Section 4.5.4.3, Installing a DIMM.

4.5.4.3 Installing a DIMM

When you install a DIMM in the workstation, keep the following guidelines in mind:

Memory modules must be installed and removed in pairs, observing sequential slot positions.

Populate DIMM sockets 1 and 2 first, followed by sockets 3 and 4.

Note - An exception to this guideline is when a DIMM module fails and becomes replaced with a unit shipped from Sun Microsystems. In that case, the DIMM modules may be replaced individually.

To install a DIMM:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Identify the DIMM slots.

5. Align the DIMM with the proper slot.

6. Insert the DIMM into the slot.

Using both thumbs, press the DIMM straight down into the DIMM slot until both ejector levers click, locking the DIMM in the DIMM slot.

The DIMMs must be inserted evenly, straight down along the DIMM slot until they are locked into place.

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

FIGURE 4-15 Installing a DIMM

Figure showing installation of a DIMM into a DIMM slot.

7. Repeat Step 4 through Step 6 for each DIMM that you want to replace.

8. Replace the left-side access panel.

4.5.4.4 Reconfiguring the System Memory

The system automatically detects the amount of memory installed. Run the BIOS setup to view the new value for total system memory, and make a note of it.

4.5.5 Replacing a PCI or Graphics Card

This procedure describes how to install a typical PCI card (including the host bus adapter) or graphics card. PCI and graphics cards might vary in the way in they are installed in the system.

4.5.5.1 Removing a PCI or Graphics Card

If you are adding a new card and not replacing a PCI or graphics card, go to Section 4.5.5.2, Installing a PCI or Graphics Card.

To remove a PCI or graphics card:

1. Turn off the system and all of the peripherals connected to it, then unplug the AC power cord from the system.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Remove any cables connected to the card.

5. Follow the instructions for the type of card you are removing:

For a PCI card (see FIGURE 4-16):

a. Unscrew the PCI card retainer.

b. Remove the PCI card.

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

FIGURE 4-16 Removing a PCI Card

Figure showing removal of a PCI card.

For a PCI Express graphics card (see FIGURE 4-17):

a. If you are removing a NVIDIA FX3450 card, remove the power supply PCI cable from the power connector on the FX3450 card.

b. Unfasten and open the PCI card retainer.

FIGURE 4-17 Removing a Graphics Card

Figure showing removal of a graphics card.

c. Pull the latch that secures the card to the slot away from the card.

d. Remove the graphics card.

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

6. Choose your next step:

If you are not replacing the PCI or graphics card, replace the slot filler panel and the left-side access panel.

If you are replacing the card, follow the instructions in Section 4.5.5.2, Installing a PCI or Graphics Card.

4.5.5.2 Installing a PCI or Graphics Card

Note the following if you are installing 33 Mhz PCI cards (see FIGURE 4-18 and TABLE 4-2):

Slot 1, Slot 3, and Slot 4 can accept 32- or 64-bit half-length cards.

Slot 2 is restricted to 32-bit cards, 6-inches or shorter.

Slot 4 is the only slot that can accept a 64-bit-long PCI card; however, standard configurations do not have a PCI card support guide for this slot. Long card configurations were not tested.

Note - Any 64-bit PCI cards that you install will run in 32-bit mode.

FIGURE 4-18 Locations of PCI and Graphics Card Slots

Figure showing locations of PCI and graphics cards slots. Slot locations are shown in the following table, numbered from top to bottom, as the workstation is standing upright.

TABLE 4-2 PCI and Graphics Cards Slots
Illustration Label	Slot/Connector Label	Graphics Card	Illustration Label	Slot/Connector Label	Graphics Card
1	PCI-E 1	PCI Express x16 graphics card slot	5	PCI 4	PCI 33 Mhz, slot 4
2	PCI 1	PCI 33 Mhz, slot 1	6	PCI-E 2	PCI Express x1, slot 1
3	PCI 2	PCI 33 Mhz, slot 2	7	PCI-E 3	PCI Express x1, slot 2
4	PCI 3	PCI 33 Mhz, slot 3

To install a PCI or graphics card:

1. Turn off the power switch on the back of the system and the power to all of the peripherals connected to the system.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Refer to the service label, attached to the inside of the access panel, to help you choose an empty card slot that is compatible with the card that you are installing.

5. Pull out the slot cover.

Keep it for reassembly later.

6. Remove the PCI or graphics card from its protective packaging, and lay the card on an antistatic surface until you are ready to install it.

7. Follow the instructions for the type of card you are installing:

For a PCI card (see FIGURE 4-19):

a. Position the card over the selected slot.

b. Press down on the card until it is completely seated in the slot.

FIGURE 4-19 Installing a PCI card

Figure showing installation of a PCI card.

For a PCI Express graphics card (see FIGURE 4-20):

a. Pull the tab at the right side of the slot away from the slot.

b. Position the card in the selected slot. Ensure that the notch, on the bottom right corner of the card, engages the latch on the motherboard.

c. Press down on the card until it is completely seated in the slot.

FIGURE 4-20 Installing a Graphics Card

Figure showing instatllation of a graphics card.

8. Fasten the retaining screw into place. Torque the screws to 8- to 9-inch pounds.

9. If you are installing a NVIDIA FX3450 card, attach the power supply PCI cable to the power connector on the FX3450 card.

10. Replace the left-side access panel.

4.5.6 Replacing the System Battery

The battery specifications for the Sun Ultra 20 Workstation are shown in TABLE 4-3.

TABLE 4-3 Battery Specifications
Specification	Value
Voltage	3 VDC
Type	CR 2032

To remove and install the battery:

Caution - If you remove the system battery, you could erase all system-specific information saved in the CMOS.

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Pinch the battery latch together until the battery pops out of the motherboard socket (see FIGURE 4-21).

5. Lift the battery to remove it (see FIGURE 4-21).

FIGURE 4-21 Removing the System Battery

Figure showing removal of the system battery.

6. Insert a new battery with the positive sign (+) facing up (see FIGURE 4-22).

Tilt the battery into the battery connector, angling the battery under the battery latch. Slide the battery until it clicks into place.

FIGURE 4-22 Installing a System Battery

Figure showing installation of a system battery.

7. Replace the left-side access panel.

4.5.7 Replacing the System Fan

4.5.7.1 Removing the System Fan

To remove the system fan:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Remove the left-side access panel.

3. Locate the system fan on the back inside panel of the workstation.

FIGURE 4-23 Position of the System Fan

Figure showing position of the system fan.

4. Disconnect the system fan's power connector from the Fan 1 connector on the motherboard.

5. Push forward the two latches on the left side of the fan bracket, and pull the fan to the left to release the four hooks on the back of the bracket from the holes in the chassis (see FIGURE 4-24).

FIGURE 4-24 Removing the System Fan

Figure showing removal of the system fan.

6. Pull the fan away from the chassis.

4.5.7.2 Installing the System Fan

1. Remove the left-side access panel, if necessary.

2. Remove the new fan from its package.

3. Locate the four corner holes in the chassis grill where the fan tabs will be installed.

4. Push forward the two latches on the left side of the fan bracket, and attach the four hooks on the back of the bracket to the four corner holes in the back chassis grill (see FIGURE 4-25).

FIGURE 4-25 Installing the System Fan

Figure showing installatin of the system fan.

5. Release the latches on the left of the fan after the fan is secured to the chassis.

6. Connect the fan cable to the Fan 1 connector on the motherboard.

Refer to FIGURE 4-34 or the service label on the system cover for the location of the Fan 1 connector.

4.5.8 Replacing the Power Supply

4.5.8.1 Removing the Power Supply

To remove the power supply:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation, and then unplug the AC power cord from the system.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface, and locate the power supply (see FIGURE 4-26).

FIGURE 4-26 Locations of Power Supply and Cables

Figure showing locatin of the power supply and cables in the system.

4. Unfasten the connectors from the motherboard and release the cable management strap (see FIGURE 4-27).

5. Unfasten the power connectors attached to the motherboard, DVD drive and SATA backplane (see FIGURE 4-27 and TABLE 4-4).

FIGURE 4-27 Locations of Power Supply Connections on the Motherboard

Figure power supply motherboard connections.

TABLE 4-4 Power Supply Cable Connections
Power cable	Connector	Power cable	Connector
P1	Motherboard PW1	P3	DVD drive
P2	Motherboard PW2	P4	SATA backplane

6. Working from outside the back of the chassis, unfasten the four mounting screws and withdraw the power supply through the interior of the system chassis (see FIGURE 4-28).

FIGURE 4-28 Removing the Power Supply From the Chassis

Figure showing power supply removal.

7. Install the new power supply as shown as Section 4.5.8.2, Installing the Power Supply.

4.5.8.2 Installing the Power Supply

To install the power supply:

1. Remove the left-side access panel, if necessary.

2. Gently lay the system on its right side on a stable, non-slip surface.

3. Remove the new power supply from its package.

4. Locate where the power supply is to be installed, and place the power supply inside the chassis (see FIGURE 4-29).

a. Align the power supply IEC-320 connector (power cord socket) and fan with the chassis back-panel opening.

b. Position the power supply with the chassis power supply brackets.

c. Rotate the power supply down and into the chassis.

FIGURE 4-29 Installing the Power Supply Into the Chassis

Figure showing power supply installation.

5. Fasten the power supply to the chassis.

6. Reconnect the power supply cables (see FIGURE 4-27 and TABLE 4-4) and secure them with the cable management tie.

Caution - When installing power supply cables, make sure that the cables do not interfere with the DIMMs. If the cables push against the DIMMs after they are installed, they could cause the DIMMs to become loosened from the connectors.

7. Replace the left-side access panel.

4.5.9 Replacing the I/O Board Assembly

4.5.9.1 Removing the I/O Board Assembly

To remove the I/O board assembly:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Disconnect any audio, USB, and IEEE 1394 cables connected to the front of the workstation.

3. Remove the bezel (see Section 4.3.2, Removing the Front Bezel).

FIGURE 4-30 Position of the I/O Board Assembly in the Chassis

Figure showing location of the I/O board.

4. Remove the left-side access panel and locate the back of I/O board assembly.

5. Disconnect all cables on the back of the I/O board.

6. Loosen the captive screw securing the I/O board to the metal frame (see FIGURE 4-31).

FIGURE 4-31 Removing I/O Board

Figure showing removal of the I/O board.

7. Push the I/O board out the front of the chassis.

8. Install the new I/O board assembly as shown in Section 4.5.9.2, Installing the I/O Board Assembly.

4.5.9.2 Installing the I/O Board Assembly

To install the I/O board assembly:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Place the system unit on a flat, stable surface.

3. Push the I/O board through the back of the metal I/O board frame until the front panel is flush with the bezel opening (see FIGURE 4-32).

FIGURE 4-32 Installing the I/O Board Assembly

Figure showing installation of the I/O board.

4. Tighten the captive screw on the metal I/O board frame to secure the I/O board.

5. Connect the internal USB, Power/LED, FireWire, and audio cables to the back of the I/O board.

See FIGURE 4-33 and FIGURE 4-34 and the service label on the chassis cover for the locations of the I/O board connections.

6. Replace the left-side access panel.

7. Connect cables to the front-panel connectors as necessary.

Note - These connectors are not keyed. Make sure that you reinstall them in the proper orientation. Be careful not to bend the pins.

4.5.10 Replacing System Cables

The following system cables have a connector at each end, and so can be removed or installed by the customer. All other cables are permanently attached to a system component at one end and must be removed or replaced along with the component. See FIGURE 4-33 for locations of connectors.

Front I/O board cables:

Audio cable

USB cable

IEEE 1394 cables

Power button/LED cable

DVD cables:

IDE cable

Audio cable

SATA cables (SATA backplane)

FIGURE 4-33 Motherboard Cable Locations

Figure showing motherboard cable kit connectors. The following table shows the connectors labelled counter-clockwise from top-left corner of motherboard, as the chassis is standing upright.

TABLE 4-5 Cable Connections
Label	Motherboard connector	Component connection	Label	Motherboard connector	Component Connection
1	J8	I/O board audio	5	USB 4	I/O board J5
2	J9	DVD drive audio	6	SATA 1	SATA backplane J2
3	F1394-1 and 2	I/O board J8	7	SATA 2	SATA backplane J4
4	J45	I/O board J1	8	PRI-IDE	DVD drive

Each cable connector on the motherboard is labeled to help you identify the cable to which it should be connected.

To remove and install system cables:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Replace any cables that need to be replaced (see FIGURE 4-34).

FIGURE 4-34 Cabling Diagram

Figure showing diagram of all cables connected to the motherboard.

5. Ensure that all cable routing is correct, and that all of the cable connectors are properly seated, before reinstalling the left-side access panel.

4.5.11 Replacing a CPU

This section describes how to remove or replace a CPU and heatsink.

Note - The CPU is not a CRU and should be replaced only by trained field service technicians. The exception is the AMD Opteron model 180. See the following section for details.

4.5.11.1 AMD Opteron Model 180 CPU

If you are installing an AMD Opteron model 180 CPU, you must use the heatsink/fan assembly that is included with the model 180 CPU.

The model 180 processor can be installed without a field service technician present. Make sure to carefully follow this installation procedure to avoid damaging the processor

You will note that the heatsink/fan assembly that is included with the CPU looks different than the assembly depicted in the remove and install procedures (see FIGURE 4-35). Otherwise, the procedure for installing the CPU and heatsink/fan assembly is the same as the procedure in the following sections.

Caution - Failure to use the supplied heatsink for the Opteron 180 will cause insufficient cooling, leading to premature failure of the processor.

FIGURE 4-35 Heatsink/fan Assembly for AMD Opteron 180 Processor

Image of Opteron 180 heatsink and fan.

4.5.11.2 Removing a Heatsink and CPU

To remove a heatsink and CPU:

Note - Before removing a CPU from the motherboard, create a backup file to preserve all important data.

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Disconnect the power cord.

3. Remove the left-side access panel.

4. Gently lay the system on its right side on a stable, nonslip surface.

Caution - The heatsink can become extremely hot. Allow a few minutes for the heatsink to cool before attempting this procedure.

5. Disconnect the CPU fan cable from its connector on the motherboard.

6. Pull up the black lever on the right side of the heatsink/fan assembly to loosen the metal latch from the hook on the retaining bracket (see FIGURE 4-36).

FIGURE 4-36 Unlatching the Heatsink/Fan Assembly

Figure showing removal of the heatsink/fan assembly.

7. Push down the metal latch on the left side of the assembly to loosen the latch from the hook on the retaining bracket (see FIGURE 4-36).

8. Twist the heatsink/fan assembly to the right or the left, in order to break the seal with the thermal grease.

9. Lift the heatsink/fan assembly straight up and withdraw it from the board (see FIGURE 4-37).

FIGURE 4-37 Removing the Heatsink/Fan Assembly From the Motherboard

Figure showing removal of the heatsink/fan assembly.

10. Place the heatsink upside down on a flat surface to prevent the thermal grease from contaminating other components.

11. Depress, and then pull up the CPU socket retainer lever up to the fully open, perpendicular position (see FIGURE 4-38).

FIGURE 4-38 Removing the CPU From the Workstation

Figure showing removal of the CPU.

12. Lift the CPU out of the socket, leaving the retainer lever in the open position.

13. Install the heatsink and CPU as shown in Section 4.5.11.3, Installing a Heatsink and CPU.

4.5.11.3 Installing a Heatsink and CPU

To install a heatsink and CPU:

Note - Observe the ESD precautions and preinstallation procedures described in Section 4.2.1, ESD Precautions.

1. Ensure that the CPU socket retainer lever is in the fully open, upright position.

2. Align the CPU to its socket so that pin 1 of the CPU (indicated by the notched corner) is aligned with hole 1 of the socket (indicated by the arrow in the corner of the socket).

3. Insert the CPU into the socket.

Note - When correctly aligned, the CPU should drop effortlessly into the socket. Do not attempt to force the CPU into the socket to seat it.

FIGURE 4-39 Installing the CPU

Figure showing installation of the CPU.

4. When the CPU is positioned in the socket, press down on the socket retainer lever to lock the CPU in place.

5. Do one of the following:

If you are installing a new CPU:

a. Clean any contamination from the top of surface of the CPU, using the supplied alcohol wipe.

The heatsink assembly already has thermal grease applied. You do not need to apply additional thermal grease.

b. Remove the plastic cover from the heatsink/fan assembly.

If you are replacing an already used CPU on a new motherboard:

a. Remove the grease from the CPU and remove the thermal interface material from the heatsink using the alcohol wipe supplied with the motherboard.

b. Use the syringe that is supplied with the motherboard to apply approximately 0.5 ml of thermal grease to the center of the top of the CPU.

Empty the entire syringe onto the chip.

c. Using the wrapper of the alcohol wipe or a finger inserted into a clean plastic bag, spread out the thermal grease to a thin uniform thickness over the CPU.

Caution - Do not use an unprotected finger to spread the thermal grease, as the oils on your finger will degrade the performance.

6. Inspect the heatsink/fan assembly for dust and lint. Clean if necessary.

Caution - If you are installing an Opteron model 180 processor, make sure to use the heatsink supplied with the processor. Failure to use the supplied heatsink for the Opteron 180 will cause insufficient cooling, leading to premature failure of the processor.

7. Carefully position the heatsink/fan assembly on the CPU, aligning it with the mounting hooks to reduce movement after it makes initial contact with the layer of thermal grease.

FIGURE 4-40 Installing the Heatsink/Fan Assembly

Figure showing installation of the heatsink/fan assembly.

Caution - If the heatsink assembly is moved too much during its installation, the layer of thermal grease might not be distributed evenly, leading to component damage.

8. Attach the retaining bracket hook to the metal latch on the left side of the heatsink/fan assembly.

FIGURE 4-41 Securing the Heatsink/Fan Assembly Latches

Figure showing securing of the heatsink/fan assembly.

9. Push down on the black lever on the right side of the heatsink/fan assembly to secure the metal latch to the hook on the retaining bracket.

10. Connect the CPU fan cable to the connector on the motherboard.

11. Replace the left-side access panel.

4.5.12 Replacing the Motherboard

The following sections describe how to remove and install the Sun Ultra 20 Workstation system motherboard.

Note - The motherboard is not a CRU and should only be replaced by trained field service technicians.

4.5.13 Removing the Motherboard

To remove the motherboard:

1. Turn off the power button on the back panel and all of the peripherals connected to the workstation.

2. Remove the left-side access panel.

3. Gently lay the system on its right side on a stable, nonslip surface.

4. Remove any PCI cards installed on the motherboard (see Section 4.5.5, Replacing a PCI or Graphics Card).

5. Disconnect all cables attached to the motherboard.

6. Remove the eight Phillips screws that fasten the motherboard to the chassis (see FIGURE 4-42).

FIGURE 4-42 Removing the Motherboard Screws

Figure showing removal of the motherboard screws.

Note - Do not remove the four screws that secure the CPU heatsink/fan assembly mounting to the motherboard.

7. Pull the motherboard away from the chassis (see FIGURE 4-43).

FIGURE 4-43 Removing the Motherboard From the Chassis

Figure showing removal of motherboard from the chassis.

Refer to the following sections to remove and replace the CPU and memory:

Section 4.5.11, Replacing a CPU

Section 4.5.4, Replacing or Adding DIMMs

4.5.14 Installing the Motherboard

Caution - Observe proper ESD precautions when handling the new motherboard.

1. Replace the CPU or DIMMs as necessary.

Refer to the following sections for information about removing and replacing the CPU and memory:

Section 4.5.11, Replacing a CPU

Section 4.5.4, Replacing or Adding DIMMs

2. Center the motherboard on the chassis so that the screw holes in the motherboard align with the screw holes on the chassis.

3. Secure the eight Phillips screws that fasten the motherboard to the chassis. Torque the screws to 8- to 9-inch pounds (see FIGURE 4-44).

FIGURE 4-44 Installing the Motherboard

Figure showing installing the motherboard screws.

4. Replace any PCI or graphics cards.

See Section 4.5.5, Replacing a PCI or Graphics Card.

5. Reconnect all internal system cables.

See Section 4.5.10, Replacing System Cables.

6. Replace the system cover.

7. Replace any external cables, and power on the workstation.