C H A P T E R 5 - Replacing Chassis Components

C H A P T E R 5

Replacing Chassis Components

This chapter describes the removal and installation procedures for the Sun Ultra 45 or Ultra 25 workstation chassis components.

This chapter contains the following topics:

Section 5.1, Replacing the Fan Tray and Fan Tray Backplane

Section 5.2, Replacing the Power Supply

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 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 with the workstation.

5.1 Replacing the Fan Tray and Fan Tray Backplane

This section describes removal and installation of the fan tray and fan tray backplane.

Caution - Do not operate the workstation without the fan tray.

5.1.1 Removing the Fan Tray

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. Using the handle, pull the fan tray from the chassis and set it aside.

FIGURE 5-1 Removing the Fan Tray

5.1.2 Removing the Fan Tray Backplane

1. Disconnect the fan tray backplane from the motherboard at connector J20 (FIGURE 5-1).

2. Using a No. 2 Phillips screwdriver, remove the screws for the fan tray backplane.

FIGURE 5-2 Removing the Fan Tray Backplane

5.1.3 Installing the Fan Tray and Fan Tray Backplane

1. Using a No. 2 Phillips screwdriver, mount the backplane to the chassis.

Do not overtighten the screws.

2. Connect the fan tray cable to the backplane and to the motherboard at connector J20.

3. Align the fan tray in the chassis slot so that the connector is closest to the top of the chassis (FIGURE 5-2).

4. If you are finished working, reassemble the workstation and power on the workstation.

Refer to Reassembling the Workstation.

5.2 Replacing the Power Supply

This section describes removal and installation of the power supply.

5.2.1 Removing the Power Supply

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.

1. If necessary, remove any long PCI cards that are blocking the cables.

Place the PCI card on an antistatic mat.

2. Remove the fan tray.

FIGURE 5-3 Removing the Power Supply

3. Squeeze the power supply connector clip to disconnect the following cables from the motherboard (FIGURE 5-3).

P2 power cable on the motherboard (J22)

P1 power cable on the motherboard at (J28)

P5 power supply signal cable on the motherboard (J45)

4. Disconnect the following cables from the hard drive backplane

P3 hard drive backplane power cable on the hard drive backplane (J2)

Hard drive signal cable to J4 on the hard drive backplane. (This cable also serves as a cable clip over other cables).

5. Turn the captive screw that secures the power supply to the chassis (FIGURE 5-3).

6. Using the handle, push the power supply out of the back of the chassis.

7. Guide the power cables out of the chassis as you push the power supply out the back of the chassis.

Set the power supply aside on an antistatic mat.

Proceed to Installing the Power Supply.

5.2.2 Installing the Power Supply

1. Remove the new power supply from its package.

2. Align the power supply IEC-320 connector so that the power cord socket is nearest the left rear of the chassis, when viewed from the back (FIGURE 5-4).

FIGURE 5-4 Installing the Power Supply

3. Guide the cables and push the power supply into the chassis opening until the back of the power supply aligns with the back of the chassis.

4. Tighten the captive screw that secures the power supply to the chassis (FIGURE 5-4).

5. Connect the following cables (FIGURE 5-5):

P1 power cable on the motherboard at (J28)

P2 power cable on the motherboard (J22)

P3 hard drive backplane power cable on the hard drive backplane (J2)

P5 power supply signal cable on the motherboard (J45)

Hard drive signal cable to J4 on the hard drive backplane. (This cable also serves as a cable clip over other cables).

FIGURE 5-5 Power Supply Cable Connections at Motherboard and Hard Drive Backplane

6. Inspect the power supply fasteners to verify that:

The power supply push bar is seated.

The power supply captive screw is tight.

7. Inspect the power supply cabling to verify that:

The three power supply cables are firmly connected to the motherboard at P1, P2, and P5 (J45).

The hard drive backplane power cable is firmly connected at J4.

The hard drive backplane signal cable is securely connected at both ends and is routed over the other cables.

8. Install the fan tray.

9. If you removed any PCI cards, re-install them.

See Section 3.5.5, Installing a PCI Card.

10. Reasemble the workstation. Power on the system, and verify the power supply installation.

Refer to Reassembling the Workstation.

Note - Boot the system with the -r option, so that the Solaris Operating System can reconfigure itself for the new component. See Finishing Component Replacement.