Manuals

DTA: Removing and Replacing Parts

Removing/Replacing Parts

NOTE: To replace parts, follow the steps below in reverse.

Removing the Cover

1. Turn off the power and unplug the power cable.
2. Remove the thumbnut that secures the cover to the back of the computer.
3. Squeeze the 2 lower cover latches to release the cover.
4. Slide the cover 2 or 3 inches toward the back of the computer.
5. Lift the cover up off the computer.

Removing/Replacing the Front Bezel

1. Remove the cover.
2. Press inward on the 2 tabs at the top and the 1 tab on the right side of the chassis to release the latches.
3. Reach inside the left side of the chassis and press inward on the left-side bezel latch.
4. Rotate the top of the front bezel away from the chassis, and lift the bezel away from the chassis.

Removing/Replacing 5.25-Inch Plastic Front-Panel Inserts

1. Remove the cover.
2. Remove the front bezel.
3. Use a screwdriver to gently pry outward on the lower latch at each end of the insert to release it.
4. Rotate the bottom of the insert 90� toward the inside of the bezel, and lift it out of the bezel.

Removing/Replacing the 3.5-Inch Front Panel Inserts

There are 2 types of 3.5-inch front panel inserts:

  One has an opening for a 3.5-inch drive

  One is solid and completely covers the opening when there is not a drive installed.

1. Remove the cover.
2. Remove the front bezel.
3. Push the 2 insert latches toward the center of the insert to release it.
4. Rotate the insert out the front of the bezel.

Removing/Replacing Metal Drive-Bay Inserts

1. Remove the cover.
2. Remove the front bezel.
3. Hold the insert in place while using a nut driver to unscrew the screws that secure the insert to the system unit.

Removing/Replacing a 5.25-Inch Drive

1. Remove the cover.
2. Remove the front bezel.
3. Remove the metal inserts if needed.
4. Disconnect the power cable and the interface cable from the back of the drive.
5. To remove the drive, squeeze the tabs on each side of the drive, and slide it forward and out of the drive bay.

NOTE: When sliding the new drive into its drive bay, make sure that both drive rail tabs snap into place. If they do not, adjust the position of each drive rail by loosening the screws and sliding the drive rail forward or backward as needed.

Bay Removing/Replacing a Drive in an External 3.5-Inch Drive Bay

1. Remove the cover.
2. Remove the front bezel.
3. Remove all cables from the back of the 3.5-inch diskette drive and the top hard-disk drive.
4. The diskette drive and top hard-disk drive are removed together by unscrewing the top mounting screw on the top hard-disk drive at the front of the chassis.
5. Slide the drive bracket toward the back of the system to disengage the 4 tabs on the top of the bracket.
6. Remove the 2 screws on each side of the 3.5-inch drive bracket, and slide the drive out of the drive bracket.

Removing/Replacing a Hard-Disk Drive

Top hard-disk drive:
1. Remove the cover.
2. Disconnect any cables from the back of the drive.
3. Remove the mounting screws that secure the top hard-disk drive bracket to the 3.5-inch diskette-drive bracket.
4. Remove the top hard-disk-drive mounting screw at the front of the chassis.
5. Slide the bracket toward the back of the chassis to disengage the 4 tabs on the top of the bracket.
6. Remove the 2 screws on each side of the drive; then slide the drive out of the bracket.

Bottom hard-disk drive:
1. Remove the cover.
2. Disconnect the cables from the back of the drive.
3. If the drive is mounted to a carrier plate, remove the 2 bracket-retaining screws at the front of the chassis.
If the drive is mounted directly to the inside wall, remove the 4 screws attaching the drive to the wall.
4. Slide the bottom hard-disk drive bracket up to disengage the bracket from the 2 tabs on the inside wall of the chassis, and remove it.
5. Remove the 2 screws on each side of the drive; then slide the drive out of the bracket.

Removing/Replacing the Power Supply

1. Remove the cover.
2. Disconnect the power cables from the system board, from any drives, and from any expansion cards.
3. Support the power supply while removing the 2 power-supply mounting screws from the back of the chassis.
4. Slide the power supply toward the front of the chassis; then tilt the left side down and bring it out of the chassis.

Removing/Replacing the Power Switch and Cable

1. Remove the cover.
2. Remove the front bezel.
3. Disconnect the power switch cable from the RP connector on the system board.
4. Remove the 2 screws that secure the power switch to the front of the chassis.
5. Remove the power switch and cable from the system unit

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Removing/Replacing the Cooling Fan Assembly

1. Remove the cover.
2. Disconnect the cooling fan cable from the CPUFAN connector on the system board.
3. Remove the 2 screws that secure the cooling fan to the back-inside wall of the chassis, and remove the fan.

Removing/Replacing the Card Guide Assembly and Components

1. Remove the cover.
2. Disconnect any cables connected to all full-length expansion cards installed, and remove these expansion cards.
3. Remove the front bezel.
4. Remove the power switch.
5. Disconnect the cables for the hard-disk drive access indicator (HDLED), the power indicator (PWRLED), and the reset switch (RST) from the system board.
6. Press inward on the 4 mounting tabs that secure the card guide assembly to the front panel.
7. Remove the card guides, including the indicators and reset switch, as an assembly.

Removing/Replacing the Reset Switch and Cable

1. Remove the cover.
2. Remove the front bezel.
3. Disconnect the reset switch cable from the RST connector on the system board.
4. Unthread the cable out of the ferrite cylinder attached to the card guide assembly.
5. Use a small screwdriver to push the reset switch out through the front of the chassis. Guide the cable out through the card guide assembly.

Removing/Replacing the Heat Sink Assembly and Microprocessor

1. Remove the cover.
2. Remove the heat-sink retention clip from the microprocessor/heat sink assembly. Press on the folded part of the clip with a small screwdriver to release it.
3. Push outward and then upward on the microprocessor socket release lever to rotate it to its fully vertical position.
4. Lift the microprocessor/heat sink assembly out of its socket.
Use the dented corner of the chip to orient the replacement chip in the same direction as the chip removed.

Removing/Replacing the Battery

1. Remove the cover.
2. Pry the battery out of its socket with a blunt, nonconductive object.

Removing/Replacing the System Board

1. Remove the cover.
2. Disconnect any cables attached to the port connectors on the I/O panel.
3. Disconnect the all internal cables from the system board.
4. Remove any expansion cards.
5. Remove the 3.5-inch diskette drive bracket and the top hard-disk drive bracket.
7. Lay the system on its side to remove the 6 screws that secure the system board to the chassis.
8. Lift the system board out from the plastic standoffs and remove the board from the system unit.

When installing the new system board in the computer, push the system board against the back of the chassis so that the system board makes firm contact with the I/O gasket to prevent EMI leakage.

CAUTION: Failure to install the system board exactly as described may result in EMI leakage that could interfere with other electronic devices.