Disassembly and Reassembly
REMOVAL Procedures
This section contains step-by-step procedures for disassembling the system unit. Reassembly is the reverse of disassembly. Each procedure is supported by simplified disassembly illustrations to facilitate removal. The section also contains an Illustrated Parts Breakdown (IPB) and parts lists for the system unit. For complete disassembly of the system unit, follow the disassembly order listed in Table 7-1. For individual component removal, you do not need to perform a total disassembly. Go to the referenced page in Table 7-1 and perform the individual disassembly. A Phillips-head screwdriver and a flat-tip screwdriver are the only tools required for disassembly. Table 7-1 Disassembly Sequence
Sequence 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Part Front Bezel Assembly Main Access Panel Side Access Panel ECC Memory Board Processor Board (primary, termination, or secondary) Voltage Regulator Board Fast Ethernet LAN Board System Board Thermal Guard Sensor Fans Speaker System Power-On Switch Power Supply Power Supply Cage System Status LED Board SCSI Device Status LED Board Blank Panel Device Tray
See Page
7-3 7-4 7-5 7-7 7-9 7-10 7-11 7-12 7-13 7-15 7-16 7-17 7-19 7-19 7-21 7-22 7-23
18 19 20 21 22 23
Standard Diskette Drive and Diskette Bracket 5 1/4-Inch Storage Devices 3 1/2-Inch Storage Devices SCSI Distribution Panel System Unit Keylock Base Foot Stand
7-24 7-26 7-27 7-29 7-31 7-32
When disassembling the system unit, follow these general rules.
WARNING: Be sure that the system unit power is turned off and unplugged before disassembly. Voltage is present inside the system unit before and after the power switch is turned off. All voltage is removed only when the power cord is unplugged.
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Disconnect all options and peripherals. When handling boards or chips, touch the system unit frame to release static. Do not disassemble parts other than those specified in the procedure. All screws are Phillips-head, unless otherwise specified. Label all removed connectors. Note where the connector goes and in what position it was installed. On completion of any reassembly, perform a power-on test. If a fault occurs, verify that the reassembly was performed correctly. If the problem persists, see Section 6, "Maintenance and Troubleshooting."
Removing the Front Bezel Assembly
The front bezel assembly includes the top access door, security panel door, and bottom access door. Use the following procedure to remove the assembly (see Figure 7-1).
WARNING: Turn off all system power and disconnect the system and its peripherals from their power sources.
1. Turn off and unplug the system's power cord. Unplug and disconnect 2. 3. 4. 5.
any peripherals. Open the security panel door by pushing on the door momentarily. Insert your security key into the keylock and turn it clockwise to unlock the bottom access door. Open the bottom access door by grasping its right side and pulling it open. Remove the four screws securing the front bezel assembly to the chassis.
Figure -1 Removing the Front Bezel Assembly
6. Grasp the top sides of the front bezel assembly and carefully pull out
the top just enough to snap it out of its two bezel guide pins.
7. Lift the front bezel assembly up to clear it from the two cutouts in the
chassis, then remove the assembly from the chassis.
8. Reinstall the front bezel assembly by inserting the two flanges on the 9. 10.
inside bottom of the assembly into the cutouts in the bottom front of the chassis. Snap the top of the front bezel assembly onto the two bezel guide pins at the top of the chassis. Close the bottom access door, lock the door, and close the security panel door.
11. Reconnect all peripherals and plug in all power cords. Removing the Main Access Panel
Remove the main access panel as follows (see Figure 7-2).
WARNING: Be sure that the system unit power is turned off and unplugged before removing the main access panel. All voltage is removed only when the power cord is unplugged.
1. Turn off the system power and unplug the system. 2. Disconnect any peripherals (including the keyboard and mouse) and
Ethernet cable if attached to the rear of the system.
3. Remove the front bezel assembly (see "Removing the Front Bezel 4. 5. 6.
Assembly," above). Locate and remove the three Phillips head screws on the front left side of the chassis (see Figure 7-2). Save the screws. Carefully slide the main access panel toward the front of the chassis until each of its locking hooks are free of the locking slots in the chassis. Pull the panel away from the chassis and out of its locking slots.
Figure 7-2 Removing the Main Access Panel
Removing the Side Access Panel
Remove the side access panel as follows (see Figure 7-3).
WARNING: Be sure that the system unit power is turned off and unplugged before removing the side access panel. All voltage is removed only when the power cord is unplugged.
1. Turn off the system power and unplug the system. 2. Disconnect any peripherals (including the keyboard and mouse) and
Ethernet cable if attached to the rear of the system.
3. Remove the front bezel assembly (see "Removing the Front Bezel 4. 5. 6.
Assembly," above). Locate and remove the three Phillips-head screws on the front right side of the chassis (see Figure 7-3). Save the screws. Carefully slide the side access panel toward the front of the chassis until each of its locking hooks are free of the locking slots in the chassis. Pull the panel away from the chassis and out of its locking slots.
Figure 7-3 Removing the Side Access Panel
Removing the ECC Memory Board
Remove the ECC memory board as follows (see Figure 7-4).
WARNING: Be sure that the system unit power is turned off and unplugged before removing the main access panel. All voltage is removed only when the power cord is unplugged.
1. Turn off power to the system unit and unplug the power cable. 2. Remove the main access panel (see "Removing the Main Access 3. 4. 5.
Panel", above). Locate the ECC memory board and its retaining bracket (see Figure 74). Remove the two screws securing the board retaining bracket to the chassis and remove the bracket. Gently pull the memory board straight out of its connector on the system board and place the memory board on an electrostatic free surface.
CAUTION: Electrostatic discharge can damage board components. Avoid touching components. Before handling boards discharge any static electricity by touching the system's metal chassis.
Figure 7-4 Removing the ECC Memory Board
Removing A CPU Board or Termination Board
Remove the primary CPU board, termination board, or secondary CPU board as follows (see Figure 7-5).
WARNING: Be sure that the system unit power is turned off and unplugged before removing the main access panel. All voltage is removed only when the power cord is unplugged.
1. Turn off power to the system unit and unplug the power cable. 2. Remove the main access panel (see "Removing the Main Access 3. 4.
Panel," above). Locate the appropriate board (primary CPU, termination, or secondary CPU) being removed from the system board (see Figure 7-5). Remove the two screws securing the board retaining bracket to the chassis and remove the bracket (see Figure 7-5).
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For the primary CPU board only, remove the screw holding the board to the left side of the chassis.
5. Gently pull the board straight out of its connector on the system
board and place it on an electrostatic free surface.
CAUTION: Electrostatic discharge can damage board components. Avoid touching components. Before handling boards discharge any static electricity by touching the system's metal chassis.
Figure 7-5 Removing a CPU or Termination Board
Removing the Voltage Regulator Board
Remove the voltage regulator board from the CPU module as follows.
WARNING: Be sure that the system unit power is turned off and unplugged before removing the main access panel. All voltage is removed only when the power cord is unplugged.
1. Remove the CPU board (see "Removing a CPU Board or Termination
Board," above).
2. Simultaneously press down on the two retaining clips holding the
voltage regulator board in its socket.
3. Pull the voltage regulator board straight up and out of its socket.
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