Figure 4. Inside the
Small Form-Factor Chassis
 |
| 1 |
CD-ROM drive interface cable |
| 2 |
Externally accessible upper bay |
| 3 |
Hard-disk drive |
| 4 |
Diskette-drive interface cable |
| 5 |
Hard-disk drive interface cable |
| 6 |
Expansion-card cage |
| 7 |
System board |
| 8 |
Expansion-card slots |
| 9 |
I/O ports and connectors |
| 10 |
AC power receptacle |
| 11 |
Security cable slot |
| 12 |
Power supply |
| 13 |
Chassis intrusion switch |
|
Figure 5. Inside the
Low-Profile Chassis
 |
| 1 |
Diskette drive in upper bay |
| 2 |
Diskette drive interface cable |
| 3 |
Hard-disk drive interface cable |
| 4 |
Hard-disk drive |
| 5 |
Chassis intrusion switch |
| 6 |
Expansion-card cage |
| 7 |
Expansion-card slots |
| 8 |
Security cable slot |
| 9 |
I/O ports and connectors |
| 10 |
AC power receptacle |
| 11 |
Padlock ring |
| 12 |
Power supply |
|
Figure 6. Inside the
Mini Tower Chassis
 |
| 1 |
External drive bay |
| 2 |
Internal drive cage |
| 3 |
Chassis intrusion switch |
| 4 |
Hard-disk drive interface cable |
| 5 |
Expansion-card cage |
| 6 |
System board |
| 7 |
Riser board |
| 8 |
Padlock ring |
| 9 |
Security cable slot |
| 10 |
I/O ports and connectors |
| 11 |
AC power receptacle |
| 12 |
Power supply |
|
Figure 7 shows the system board and the location of all its sockets and connectors.
Figure 7. System
Board Components
 |
| 1 |
Audio connectors |
| 2 |
NIC connector |
| 3 |
CD audio and telephony connectors |
| 4 |
Video connector |
| 5 |
Fan 2 connector |
| 6 |
Diagnostic LED connector |
| 7 |
Serial port 2 connector |
| 8 |
USB connectors (2) |
| 9 |
Keyboard (lower) and mouse (upper)
connectors |
| 10 |
Voltage regulator module |
| 11 |
Parallel port (upper) and serial port 1
(lower) connectors |
| 12 |
Fan 1 connector |
| 13 |
PC speaker |
| 14 |
DC power connector |
| 15 |
DIMM connectors (2) |
| 16 |
3.3-volt (V) power connector |
| 17 |
Microprocessor |
| 18 |
Auxiliary power indicator |
| 19 |
Front panel cable connector |
| 20 |
Battery |
| 21 |
External speaker connector |
| 22 |
Diskette/tape-drive connector |
| 23 |
EIDE2 connector |
| 24 |
EIDE1 connector |
| 25 |
Riser board connector |
|
Figure 8 shows the jumper on the system board. Table 1 shows the system board jumper and
its settings.
Figure 8. System Board
Jumper
A jumper is a small block on a circuit board with two or more pins
emerging from it. Plastic plugs containing a wire fit down over the pins. The wire
connects the pins and creates a circuit.
NOTICE: Make sure that your system is turned off and unplugged before you
change the jumper setting. Otherwise, damage to your system or unpredictable results may
occur.
To change the jumper setting to disabled, pull the plug off its
pins. To reenable the setting, carefully fit the plug onto the pins indicated.
Table 1.
System-Board Jumper Settings
Table 2 lists the labels for connectors and sockets on the system
board and gives a brief description of their functions.
Table 2. System Board Connectors and Sockets
| Connector or Socket |
Description |
| AUX_PWR |
Auxiliary power indicator |
| BATTERY |
Battery socket |
| CD-IN |
CD-ROM drive audio cable connector |
| DIAG_LED |
Diagnostic LED cable |
| DIMM_x |
Dual in-line memory module (DIMM) socket |
| DSKT |
Diskette/tape drive interface connector |
| ENET |
Integrated network interface controller
(NIC) connector |
| EXT_SPKR |
External speaker connector |
| FAN1, FAN2 |
Microprocessor fan connector (FAN1), fan
connector (FAN2) |
| FRONTPANEL |
Front panel cable connector |
| IDEn |
EIDE interface connector |
| KYBD_MOUSE |
Keyboard and mouse connectors |
| LINE-IN |
Line-in jack |
| LINE-OUT |
Line-out jack |
| MIC |
Microphone jack |
| MICROPROCESSOR |
Microprocessor connector |
| MODEM |
Telephony connector |
| MONITOR |
Video connector |
| PAR_SER1 |
Parallel and serial port connectors |
| POWER_1 |
Main power input connector |
| POWER_2 |
3.3-V power input connector |
| PSWD |
Password jumper |
| RISER |
Riser board connector |
| SERIAL2 |
Serial port connector |
| SPEAKER |
Internal speaker |
| USB01 |
Universal Serial Bus (USB) connectors |
| VRM |
Voltage regulator module connector |
To access some components on the system board, you may have to
rotate the power supply out of the way. To rotate the power supply, perform the
following steps.
- Remove the computer cover as instructed in "Removing and Replacing the Computer Cover."
- Disconnect the AC power cable from the AC power receptacle on the
back of the power supply.
- Free the power supply from the securing tab labeled "RELEASE
—>," and rotate it upward until it locks in its extended position (see Figure
9).
Figure 9. Rotating the Power Supply
 |
| 1 |
AC power cable |
| 2 |
AC power receptacle |
| 3 |
Power supply |
| 4 |
DC power cables |
| 5 |
Securing tab |
|
To access some drive bays in the mini tower chassis, you must first remove the front
bezel. To remove the front bezel, perform the following steps.
- Remove the computer cover.
- With the cover removed, release the bezel by pressing the tab release
(see Figure 10).
Figure 10. Removing the
Mini Tower Chassis Front Bezel
 |
| 1 |
Tab release |
| 2 |
Retaining hooks (2) |
|
- While you press the tab release, tilt the bezel away from the
chassis, disengage the two retaining hooks at the bottom of the bezel, and carefully pull
the bezel away from the chassis.
To replace the bezel, fit the two retaining hooks on the bezel into
their corresponding slots at the bottom of the mini tower chassis. Then rotate the bezel
toward the chassis until the tabs snap into their corresponding slots on the bezel.
This section describes how to remove and replace the expansion-card
cage.
To remove the expansion-card cage from the small form-factor
chassis, perform the following steps.
- Remove the computer cover as instructed in "Removing
and Replacing the Computer Cover."
- Check any cables connected to expansion cards
through the back-panel openings. Disconnect any cables that will not reach the cage once
it is removed from the chassis.
- Locate the securing lever (see Figure 11), and rotate the
lever upward until it stops in an upright position.
Figure 11. Removing the
Expansion-Card Cage From the Small Form-Factor Chassis
 |
| 1 |
Securing lever |
| 2 |
Expansion-card cage |
| 3 |
Tab |
| 4 |
Hook |
|
- Lift the expansion-card cage up out of the chassis.
To replace the expansion-card cage in the small form-factor chassis,
perform the following steps:
- With the securing lever in the upright position, align the tab in the
side of the expansion-card cage with the hook on the side of the chassis (see Figure 11), and slide the expansion-card cage down
into place.
- Rotate the securing lever downward until it is flush with the top
side of the chassis. Make sure that the riser board is fully seated in the RISER connector
on the system board.
- Reconnect any cables that you removed in step 2
of the previous procedure.
To remove the expansion-card cage from the low-profile chassis,
perform the following steps.
- Remove the computer cover as instructed in "Removing and Replacing the Computer Cover."
- Check any cables connected to expansion cards
through the back-panel openings. Disconnect any cables that will not reach the cage once
it is removed from the chassis.
- Locate the securing lever (see Figure 12), and rotate the lever
upward until it stops in an upright position.
Figure 12. Removing the
Expansion-Card Cage From the Low-Profile Chassis
 |
| 1 |
Securing lever |
| 2 |
Expansion-card cage |
| 3 |
Slots (2) |
| 4 |
Tabs (2) |
|
- Lift the expansion-card cage up out of the chassis.
To replace the expansion-card cage in the low-profile chassis,
perform the following steps:
- With the securing lever in the upright position, align the slots in
the side of the expansion-card cage with the tabs on the side of the chassis (see Figure 12), and slide the expansion-card cage down into
place.
- Rotate the securing lever downward until it is flush with the top
side of the chassis. Make sure that the riser board is fully seated in the RISER connector
on the system board.
- Reconnect any cables that you removed in step 2
of the previous procedure.
To remove the expansion-card cage from the mini tower chassis,
perform the following steps.
- Remove the computer cover as instructed in "Removing and Replacing the Computer Cover."
- Check any cables connected to expansion cards through the
back-panel openings. Disconnect any cables that will not reach the cage once it is removed
from the chassis.
- Locate the securing lever (see Figure 13), and rotate the lever
upward until it stops in an upright position.
Figure 13. Removing the
Expansion-Card Cage From the Mini Tower Chassis
 |
| 1 |
Securing lever |
| 2 |
Slots (2) |
| 3 |
Tabs (2) |
|
- Slide the expansion-card cage out of the chassis.
- Lift the expansion-card cage up and away from the chassis.
To replace the expansion-card cage in the mini tower chassis,
perform the following steps:
- With the securing lever in the upright position, align the slots in
the left side of the expansion-card cage with the tabs on the back and bottom of the
chassis (see Figure 13), and slide the
expansion-card cage into place.
- Rotate the securing lever inward until it is flush with the top side of the chassis.
Make sure that the riser board is fully seated in the RISER connector on the system board (see Figure
7).
- Reconnect any cables that you removed in step 2
of the previous procedure.
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