NEC powermate dt Installation instructions

Desktop Chassis Disassembly
nRequired Tools
nDisassembly Instructions
nReassembly Instructions

Disassembly and Reassembly -2
Required Tools
All disassembly procedures can be performed using the following tools:
nPhilips screwdriver
nFlatbed screwdriver
Disassembly Instructions
This document contains step-by-step disassembly instructions for the desktop chassis. The
instructions are clarified by images of the part that is being removed or disassembled.
Furthermore, the screws that are removed are shown next to the image of the parts
themselves.
When disassembling the system unit, follow these general rules.
nDo not disassemble the system into parts that are smaller than those
specified in the instructions.
nLabel all removed connectors. Note where the connector goes and in what
position it was installed.
nTurn off the power and disconnect all power and all options.
Electrostatic discharge can damage computer components.
Discharge static electricity by touching a metal object before
removing the system unit cover.

Disassembly and Reassembly -3
1. Opening the Chassis
To open the chassis do as follows:
1. Remove the (thumb)screws at the rear of the chassis.
Fig. 1: Removing the cover screws
2. Slide the cover towards the back of the chassis and lift it off.
Fig. 2: Sliding away the cover
2. Removing the Drive Bay
To remove the bay containing the drives, first open the chassis
(see the section Opening the Chassis) than do as follows:
1. Disconnect all cables from the drives present in the drive
bay.
2. Unscrew the two screws as shown.
A

Disassembly and Reassembly -4
Fig. 3: Unscrewing the drive bay
3. Slide the bay towards the back of the system in order to
free the hooks that anchor the bay to the chassis.
4. Carefully lift rear of the bay and pull the whole assembly out
of the chassis.
3. Removing FDD, CD-ROM, Hard Disk
Drive
To remove FDD, CD-ROM or hard disk drive first open the
chassis (see the section Opening the Chassis), take the drive
bay out of the system (see Removing the Drives Bay) then do
as follows:
nFloppy Disk Drive
1. Remove the two screws at the side of the floppy disk drive
as shown.
2. Slide the floppy disk drive towards the back of the bay to
disengage the lock on its bottom.
Fig. 4: Removing the side screws
3. Turn the floppy disk drive up-side down.
4. Remove the screws as shown in Fig. 5: .
B
C
B

Disassembly and Reassembly -5
Fig. 5: Removing the bottom screws
nHard Disk Drive
5. Remove the two screws at the side of the hard disk drive as
shown.
6.
Fig. 6: Unscrewing the hard disk drive
7. Slide the hard disk drive out of the bay.
8.
nCD-ROM Drive
9. Remove the screw at the side of the CD-ROM drive as
shown.
10.
Fig. 7: Removing the side screw
E
D
B

Disassembly and Reassembly -6
11. Slide the CD-ROM drive towards the front to disengage the
lock at the opposite side of the drive.
12. When the screws appear in the opening as shown in Fig. 8:
tilt the CD-ROM drive and pull it out of the bay.
Fig. 8: Sliding the drive releasing lock screws
13. Turn the CD-Rom drive on its side with the lock screws
upwards and remove the screws as shown.
14.
Fig. 9: Removing the lock screws
4. Removing the Front Bezel
To remove the front bezel, first open the chassis (see section
Opening the Chassis), remove the drive bay(see section
Removing the Drives Bay), then do as follows:
1. Unlock the three lower latches Fig. 10:
2. Tilt the front bezel upwards.
3. Carefully unlock the four upper latches (see Fig. 10: ) using
a flatbed screwdriver
E

Disassembly and Reassembly -7
Fig. 10: Front bezel latches
5. Removing the Power Supply Unit
To remove the Power Supply Unit (PSU), first open the chassis
(see section Opening the Chassis), then do as follows:
1. Disconnect the power supply connectors from all
peripherals and the motherboard.
2. Remove the screws at the rear of the chassis.
Fig. 11: Removing the PSU screws
3. Carefully take the PSU out of the system.
6. Removing the Front USB Port
To remove the USB front port, first open the chassis (see
section Opening the Chassis)then do as follows:
1. Remove the USB connector from the header on the
motherboard.
2. Remove the screws that hold the USB front port to the
chassis.
3. Take the USB port and its cable out of the chassis.
B

Disassembly and Reassembly -8
Fig. 12: Removing the front USB port
7. Removing the Switch/LED Assy
To remove the switch/LED assy, first open the chassis (see
section Opening the Chassis), remove the drive bay(see section
Removing the Drives Bay) and remove the front bezel (see
Removing the Front Bezel), then do as follows:
1. Disconnect the switch/LED cable from the header on the
motherboard.
Fig. 13: Disconnecting switch/LED cable from motherboard
2. Press the latch at the side of the switch/LED assy to
disengage it from the chassis.
B

Disassembly and Reassembly -9
Fig. 14: Unlocking the switch/LED assy
3. Carefully pull the assy and the cables away.
Note
When reassembling the switch/LED assy take care that it is
put back into its original position, i.e. with the switch at the left side of
the LEDs.
8. Removing the Motherboard
To remove the motherboard first open the chassis (see the
section Opening the Chassis) than do as follows:
1. Disconnect all cables from the motherboard and from all
add-on cards that are installed.
2. Remove the add-on cards (if any are installed).
3. Remove CPU and memory modules (refer to the
motherboard documentation for information on how to
remove memory modules and CPU).
4. Remove the screws holding the motherboard as shown.
Fig. 15: Removing motherboard screws
5. Carefully take the motherboard out of the chassis.
B

Disassembly and Reassembly -10
Reassembly Instructions
Reassembly is the reverse of the disassembly process. Use care to ensure that all cables and
screws are returned to their proper positions.