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manual abstract
You must open or remove the bezel and remove the system cover to gain access to internal components. Removing the Bezel 1. Using the system key, unlock the bezel. 2. Press the tab at the left end of the bezel. 3. Pull the bezel away from the system so that it is perpendicular to the system (see Figure 4-2). 4. Loosen the thumbscrews to release the bezel (see Figure 4-2). 5. Pull the bezel away from the chassis. Figure 4-2. Removing the Bezel Replacing the Bezel 1. Align the two thumbscrews with the mounting holes on the front of the system. 2. Tighten the thumbscrews to secure the bezel (see Figure 4-2). 3. Swing the bezel closed until it snaps into place. 4. Using the system key, lock the bezel. System Cover To upgrade or troubleshoot the system, remove the system cover to gain access to internal components. Removing the Cover CAUTION: Before you perform this procedure, you must turn off the system and disconnect it from its power source. For more information, read the safety instructions in your System Information Guide. 1. Remove the bezel (see "Removing the Bezel "). 2. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet. 3. Loosen the three thumbscrews on the front of the system (see Figure 4-3). 4. Slide the system cover backward and grasp the cover at both ends. 5. Carefully lift the cover away from the system. Figure 4-3. Removing the Cover Replacing the Cover 1. Ensure that no tools or parts are left inside the system and that any cables are routed so that they will not be damaged by the cover. 2. Align the cover with the cover alignment hooks on the sides of the chassis, and slide the cover forward (see Figure 43). 3. Tighten the three thumbscrews that secure the cover to the chassis. 4. Replace the bezel (see "Replacing the Bezel"). Inside the System In Figure 4-4, the covers and bezel are removed to provide an interior view of the system. Figure 4-4. Inside the System The system board holds the system's control circuitry and other electronic components. Several hardware options, such as the microprocessors and memory, are installed directly on the system board. The system board can accommodate up to seven PCI expansion cards (two PCI or PCI-X cards at 64-bit/33-133 MHz, four PCI or PCI-X cards at 64-bit/33-100 MHz, and one PCI card at 32-bit/33 MHz). The peripheral bay provides space for a 3.5-inch diskette drive, a CD drive, and two hard drives.The hard-drive bays provide space for up to five 1-inch SCSI hard drives. The hard drives connect to a controller on the system board or a RAID controller card through the SCSI backplane board. For more information, see "Hard Drives." The hard-drive bays provide space for up to six 1-inch hard drives. These hard drives are connected to a SCSI host adapter on the system board or on an expansion card, by way of the SCSI backplane board. The power supply distribution board (PSDB) provides power distribution for the system. One front-loadable power supply slides into connectors mounted on the PSDB to provide power to the system board and internal peripherals. An option for a second hot-pluggable power supply to provide redundant power is available. For non-SCSI drives such as the diskette drive and CD drive, an interface cable connects the interposer board, attached to the diskette drive and CD drive, to the system board. For SCSI devices, interface cables connect externally accessible SCSI devices and the SCSI backplane board to a SCSI host adapter either on the system board or on an expansion card. For more information, see "Installing a Hard Drive." During an installation, repair, or troubleshooting procedure, you may be required to change a jumper. For information on the system board jumpers, see "Jumpers and Connectors." Peripheral Bay The peripheral bay provides space for a CD/diskette drive and two hard drives (optional). CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge. Removing the Peripheral Bay 1. Remove the bezel (see "Removing the Bezel "). 2. Remove the system cover (see "Removing the Cover "). 3. Disconnect the CD/diskette drive cable from the back of the CD/diskette drive. The other end of this cable connects to the system board. 4. Disconnect any cables from any devices already installed in the peripheral bay. 5. Loosen the thumbscrew securing the back of the peripheral bay to the chassis. 6. Grasping the peripheral bay by its top handle with one hand and pressing the front of the peripheral bay, slide the peripheral bay backward approximately 0.5-inch and lift up to remove the peripheral bay from the chassis. Figure 4-5. Peripheral Bay Replacement Replacing the Peripheral Bay 1. Holding the peripheral bay by its top handle, lower it into pl...