Technical Overview: Dell Dimension XPS B Series Systems Reference
Technical Overview: Dell™ Dimension™ XPS B Series Systems Reference
| 1 |
Power supply |
10 |
Reset button |
| 2 |
DC power cables |
11 |
Bezel |
| 3 |
Diskette-drive interface
cable |
12 |
Card-guide assembly (contains
primary hard-disk drive) |
| 4 |
Secondary hard-disk drive
bracket |
13 |
Chassis |
| 5 |
Drive cage |
14 |
Filler brackets |
| 6 |
Drive bays (typical) |
15 |
System board |
| 7 |
Power indicator |
16 |
Chassis cooling fan |
| 8 |
Power button |
17 |
Support beam |
| 9 |
Hard-disk drive access
indicator |
|
|
|
|
|
|
 |
NOTES: This
system uses two types of chassis. One chassis uses a cover with an integrated support
beam. In the other chassis, the support beam is attached to the chassis and must be
removed to access internal components.
The previous illustration
shows a Dimension XPS Bxxxr computer with an installed Slot 1 processor; a Dimension XPS
Bxxx computer with an installed socketed processor looks slightly different. |
| 1 |
Power supply |
10 |
Reset button |
| 2 |
DC power cables |
11 |
Bezel |
| 3 |
Diskette-drive interface
cable |
12 |
Card-guide assembly (contains
primary hard-disk drive) |
| 4 |
Secondary hard-disk drive
bracket |
13 |
Chassis |
| 5 |
Drive cage |
14 |
Filler brackets |
| 6 |
Drive bays (typical) |
15 |
System board |
| 7 |
Power indicator |
16 |
Chassis cooling fan |
| 8 |
Power button |
17 |
Support beam |
| 9 |
Hard-disk drive access
indicator |
|
|
|
|
|
|
|
NOTES: This
system uses two types of chassis. One chassis uses a cover with an integrated support
beam. In the other chassis, the support beam is attached to the chassis and must be
removed to access internal components.
The previous illustration
shows a Dimension XPS Bxxxr computer with an installed Slot 1 processor; a Dimension XPS
Bxxx computer with an installed socketed processor looks slightly different. |
Back-Panel Features
| 1 |
Voltage selection switch |
6 |
Serial port connector |
| 2 |
Security cable ring |
7 |
USB connectors (2) |
| 3 |
Parallel port connector |
8 |
Keyboard connector |
| 4 |
Video connector |
9 |
Mouse connector |
| 5 |
Diagnostic code indicators
(4) |
10 |
AC power receptacle |
System Board
Connectors and Sockets
| 1 |
Chassis cooling-fan connector
(FAN2) |
14 |
SCSI hard-disk drive access
indicator cable connector (J7B3) |
| 2 |
Power input connector (J7L2) |
15 |
PC/PCI connector (J7A2) |
| 3 |
3.3-V power input connector
(J8L1) |
16 |
Configuration jumper (J7B2) |
| 4 |
Diskette-drive interface
connector (J8G1) |
17 |
PCI expansion-card connectors
(PCI1, PCI2, PCI3, PCI4, and PCI5) |
| 5 |
Primary EIDE channel
connector (PRIMARY IDE) |
18 |
Diagnostic code indicators
(4) |
| 6 |
Secondary EIDE channel
connector (SECONDARY IDE) |
19 |
Parallel port connector;
sometimes referred to as LPT1 (PARALLEL) |
| 7 |
Control panel connector
(J8G2) |
20 |
Serial port connector (COM1) |
| 8 |
Battery socket (BT8E1) |
21 |
USB connectors (USBn) |
| 9 |
RIMM sockets (BANK n) |
22 |
Mouse connector (MOUSE) |
| 10 |
Speaker (LS8D1) |
23 |
Keyboard connector (KEYBD) |
| 11 |
Power indicator (orange) |
24 |
Microprocessor fan connector
(J3M1) |
| 12 |
Legacy Wakeup On LAN (J7C2) |
25 |
Microprocessor connector
(J3J1) (your system board has either a Slot 1 or a socketed microprocessor connector
installed in this area) |
| 13 |
AGP connector (AGP) |
|
|
System Board Configuration
Jumper
Table 1. Configuration Jumper Settings
| Jumper Setting |
Jumper |
Description |
Pins 1-2 jumpered
(Normal mode) |
 |
In Normal mode, system setup settings and
installed passwords are retained when the system starts up. In this mode, an automatic
recovery is attempted if the BIOS detects that any of its main blocks are corrupted. |
Pins 2-3 jumpered
(Maintenance mode) |
 |
Starting the system with the jumper set in Maintenance
mode automatically starts the system setup program, adds the Maintenance option to
the menu bar, and displays the Maintenance screen. This screen provides the
following option. NOTICE: Entering Maintenance mode
returns all settings in the system setup program to their defaults. Dell strongly
recommends that you record or print all current settings before entering this mode so you
can correct them when the system is reset to Normal mode.
Clear All Passwords — Disables a forgotten
password so that you can access the system and/or assign new passwords. For the complete
password procedure, see "Disabling a Forgotten Password" in Appendix B of the Dell
Dimension XPS B Series Systems Reference and Troubleshooting Guide. |
| NOTE: The Glossary
defines abbreviations and acronyms. |
The Dimension XPS Bxxxr computer uses a single-edge processor package 2 (SEPP2)
package microprocessor and the Dimension XPS Bxxx computer uses a socketed microprocessor.
SEPP2 Microprocessor
The SEPP2 package microprocessor, shown above with the heat sink
attached, contains a 242-pin microprocessor card. The microprocessor card includes the
following features:
- Intel� Pentium� III microprocessor with
integrated 32-kilobyte (KB) primary (L1) cache
- Secondary (L2) cache of 256 KB full-speed or 512 KB half-speed of
burst synchronous random-access memory (SRAM)
The heat sink attaches to a thermal plate on the SEPP2 package. The
cartridge slides into a guide bracket assembly mounted on the system board and plugs into
the J3J1 Slot 1 connector on the system
board.
The socketed microprocessor, shown above with the heat sink
attached, contains a 370-pin microprocessor card. The microprocessor includes the
following features:
- Intel Pentium III microprocessor with
integrated 32-kilobyte (KB) primary (L1) cache
- Secondary (L2) cache of 256 KB full-speed or 512 KB half-speed of
burst synchronous random-access memory (SRAM)
The socketed microprocessor inserts into the J3J1 zero-insertion
force (ZIF) connector mounted on the system board. A clip secures the
heat sink to the connector.
Power Supply
The 200-Watt (W) power supply can operate from an AC power source of
115 volts AC (VAC) at 60 hertz (Hz) or 230 VAC at 50 Hz. The power supply provides the DC
operating voltages and currents listed in the following table.
|
NOTE: The power supply produces DC voltages only under its
loaded condition. The DC power cable connectors must be connected to their corresponding
power input connectors on the system board or drives in order to measure these voltages. |
Table 2. DC Voltage Ranges
| Voltage |
Range |
Maximum Output Current |
Notes |
| +3.3 VDC |
+3.14 to +3.47 VDC |
14.00 A |
The combined load on the +3.3-VDC and +5-VDC outputs
cannot exceed 140 W. |
| +5 VDC |
+4.90 to +5.25 VDC |
22.00 A |
The combined load on the +3.3-VDC and +5-VDC outputs
cannot exceed 140 W. |
| –5 VDC |
–4.50 to –5.50 VDC |
0.300 A |
|
| +12 VDC |
+11.40 to +12.60 VDC |
6.00 A |
The +12-VDC output can withstand surges of up to 11.0
A to support disk start-up operations. |
| –12 VDC |
–10.80 to –13.20 VDC |
0.300 A |
|
| +5 VSB |
+4.75 to +5.25 VDC |
1.2 A |
The +5 volts standby (VSB) is sometimes called volts
flea power (VFP). |
| NOTE: The Glossary defines abbreviations and acronyms. |
DC Power Cables
DC Power Connector
Pin Assignments
The power-supply output voltages can be measured at the back (wire
side) of the DC power connectors without disconnecting them. Figures 1 through 4 show the
wire side of the connectors.
Figure 1. DC Power Connector P1
 |
| 1 |
+5 VDC (red) |
| 2 |
Common (black) |
| 3 |
+5 VDC (red) |
| 4 |
Common (black) |
| 5 |
PWRGOOD1 (orange) |
| 6 |
+5 VFP (purple) |
| 7 |
+12 VDC (yellow) |
| 8 |
–12 VDC (blue) |
| 9 |
Common (black) |
| 10 |
Common (black) |
| 11 |
PSON#2 (brown) |
| 12 |
Common (black) |
| 13 |
Common (black) |
| 14 |
Common (black) |
| 15 |
–5 VDC (white) |
| 16 |
+5 VDC (red) |
| 17 |
+5 VDC (red) |
| 18 |
+5 VDC (red) |
| 19 |
Not connected |
| 20 |
+5 VDC (red) |
1 Pin
5 — PWRGOOD is a status signal generated by the power supply to notify the system
that the DC operating voltages are within the ranges required for proper system operation.
2 Pin 11 — PSON# is activated by pressing and
releasing the power button while the power supply is in standby state. Activating PSON#
connects the power supply’s PSON# input to ground, thereby switching the power supply
to full-on condition. |
|
Figure 2. DC Power Connector P2, P3, P5, and P6
 |
| 1 |
+12 VDC (yellow) |
| 2 |
Common (black) |
| 3 |
Common (black) |
| 4 |
+5 VDC (red) |
|
Figure 3. DC Power Connector P4
 |
| 1 |
+12 VDC (yellow) |
| 2 |
Common (black) |
| 3 |
Common (black) |
| 4 |
+5 VDC (red) |
|
Figure 4. DC Power Connector P7
 |
| 1 |
Common (black) |
| 2 |
Common (black) |
| 3 |
Common (black) |
| 4 |
+3.3 VDC (orange) |
| 5 |
+3.3 VDC (orange) |
| 6 |
+3.3 VDC (orange) |
|
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