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Jumpers and Switches: Dell™
PowerEdge™ 2300 Systems Installation and Troubleshooting Guide
This section
provides specific information about the jumpers on the system board. It also provides some
basic information on jumpers and switches and describes the
connectors and sockets on the various boards in the computer.
Jumpers and
switches provide a convenient and reversible way of reconfiguring the circuitry on a
printed circuit board. When reconfiguring the system, you may need to change jumper
settings on the system board. You may also need to change jumper and/or switch settings on
expansion cards or drives.
Jumpers
Jumpers are
small blocks on a circuit board with two or more pins emerging from them.
Plastic
plugs containing a wire fit down over the pins. The wire connects the pins and creates a
circuit.
To change a
jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s)
indicated.
 |
CAUTION:
Make sure the system is turned off before you change a jumper setting. Otherwise,
damage to the system or unpredictable results may occur. |
A jumper is
referred to as open or unjumpered when the plug is pushed down over only one pin or if
there is no plug at all. When the plug is pushed down over two pins, the jumper is
referred to as jumpered. The jumper setting is often shown in text as two numbers, such as
1-2. The number 1 is printed on the circuit board so that you can identify each pin number
based on the location of pin 1.
Figure 1 shows the location and default settings of the jumper blocks
on the system board. See Table 1 for the designations, default
settings, and functions of the system's jumpers.
Switches
Switches
control various circuits or functions in the computer system. The switches you are most
likely to encounter are dual in-line package (DIP) switches, which are normally packaged
in groups of two or more switches in a plastic case. Two common types of DIP switches are
slide switches and rocker switches (see the following illustration).
Each of these
switches has two positions, or settings (usually on and off). To change the setting of a
slide switch, use a small, pointed object such as a small screwdriver or a straightened
paper clip to slide the switch to the proper position. To change the setting of a rocker
switch, use the screwdriver or paper clip to press down on the appropriate side of the
switch. In either case, do not use a pen, pencil, or other object that might leave a
residue on the switch.
Figure 1. System Board Jumpers
Jumper
|
Setting
|
Description
|
CARDBIOS |
|
|
Reserved (do not change). |
ISA_CLR |
|
(default)
|
The ISA configuration settings are retained at system boot.
The ISA
configuration settings are cleared at next system boot. (If the ISA configuration settings
become corrupted to the point where the system won't boot, install the jumper plug and
boot the system. Remove the jumper before restoring the ISA configuration information.) |
PASSWD |
|
(default) |
The password feature is enabled.
The password
feature is disabled. |
333MHZ* |
|
|
The microprocessor's internal speed is 333 MHz. |
350MHZ* |
|
|
The microprocessor's internal speed is 350 MHz. |
400MHZ* |
|
|
The microprocessor's internal speed is 400 MHz (when available).
|
450MHZ* |
 |
|
The microprocessor's internal speed is 450 MHz (when available). |
RSVD1* |
 |
|
Reserved (do not change). |
RSVD2* |
 |
|
Reserved (do not change). |
* Only one of these jumpers should have a jumper plug installed. |
 |
|
|
|
Table 2 lists the connectors and sockets located on the system board.
Table 2. System Board Connectors and Sockets |
Connector or Socket
|
Description
|
BACKPLANE |
Hot-pluggable SCSI backplane board interface cable connector |
BATTERY |
Battery connector |
DIMM_x |
DIMM sockets |
INTRUSn |
Intrusion-alarm switch connectors |
ISAn |
ISA expansion-card connectors |
FANn |
Fan connectors |
FLOPPY |
Diskette drive interface connector |
HDLED |
Hard-disk drive activity indicator connector |
JVGA |
Video connector |
KYBD |
Keyboard connector |
MOUSE |
Mouse connector |
PANEL |
System control panel connector |
PARALLEL |
Parallel port connector; sometimes referred to as LPT1 |
PCIn |
PCI expansion-card connectors |
POWER1 |
Power input connector |
SCSI1 |
Ultra2/LVD SCSI host adapter connector |
SCSI2 |
Ultra/Narrow SCSI host adapter connector |
SDS_SMB |
Storage system SMB connector |
SERIALn |
Serial port connectors; sometimes referred to as COM1 and COM2 |
SVR_MGT |
Connector for DRAC card |
XSMB_OUT, XSMB_IN |
SMB connectors |
PROCESSORn |
Microprocessor guide bracket assembly and connectors |
NOTE: For the full name of an abbreviation or acronym used in this table, see the Abbreviations and Acronyms list. |
Figure 2 shows the location of the connectors on the 1 x 6
hot-pluggable SCSI backplane board.
Figure 2. 1 x 6 Hot-Pluggable SCSI Backplane Board
Table 3 lists the connectors on the 1 x 6 hot-pluggable SCSI backplane
board.
Table 3. 1 x 6 Hot-Pluggable SCSI Backplane Board
Connectors |
Connector
|
Description
|
CTRL_PANEL |
Hard-disk drive indicator panel data cable connector |
PLANAR |
System board data cable connector |
POWER |
Power input connector |
SCSIA |
Ultra2/LVD SCSI cable connector |
SLOTn |
SCA-2-compatible SCSI hard-disk drive connector |
NOTE:
For the full name of an abbreviation or acronym used in this table, see the Abbreviations and Acronyms list. |
Figures 3 and 4 show the location of the connectors on
the two non-hot-pluggable SCSI backplane boards.
Figure 3. 2 x 2 Non-Hot-Pluggable SCSI Backplane Board
Table 4 lists the connectors on the 2 x 2 non-hot-pluggable SCSI
backplane board.
Table 4. 2 x 2 Non-Hot-Pluggable SCSI Backplane Board Connectors |
Connector
|
Description
|
POWER |
Power input connector |
SCSIA |
Ultra2/LVD SCSI cable connector for SLOT0 and SLOT1
(dual-channel mode) or SLOT0 through SLOT3 (single- channel mode) |
SCSIB |
Ultra2/LVD SCSI cable connector for SLOT2 and SLOT3
(dual-channel mode) |
SLOTn |
SCA-2-compatible SCSI hard-disk drive connector |
NOTE:
For the full name of an abbreviation or acronym used in this table, see the Abbreviations and Acronyms list that precedes the Index. |
Figure 4. 2 x 3 Non-Hot-Pluggable SCSI Backplane Board
Table 5 lists the connectors on the 2 x 3 non-hot-pluggable SCSI
backplane board.
Table 5. 2 x 3 Non-Hot-Pluggable SCSI Backplane Board Connectors |
Connector
|
Description
|
POWER |
Power input connector |
SCSIA |
Ultra2/LVD SCSI cable connector for SLOT0 through SLOT2
(dual-channel mode) or SLOT0 through SLOT5 (single-channel mode) |
SCSIB |
Ultra2/LVD SCSI cable connector for SLOT3 through SLOT5
(dual-channel mode) |
SLOTn |
SCA-2-compatible SCSI hard-disk drive connector |
NOTE:
For the full name of an abbreviation or acronym used in this table, see the Abbreviations and Acronyms list. |
The
computer's software security features include a supervisor password and a user password,
which are discussed in detail in Chapter 4, "Using the System Setup Program," of
the Dell PowerEdge 2300 Systems User's Guide. A password jumper on the system board
enables these password features or disables them and clears any password(s) currently in
use.
To disable a
forgotten supervisor password or user password, perform the following steps:
1. Remove
the right-side computer cover.
See Removing the Computer Covers.
2. Refer to
Jumpers
and Switches--A General Explanation for jumper information.
Figure 1 shows the location of the password jumper (labeled
"PASSWD") on the system board.
3. Remove the jumper plug from the PASSWD jumper.
4. Replace
the right-side computer cover, and then reconnect the computer to its power source and
turn it on.
The existing
passwords are not disabled (erased) until the system boots with the PASSWD jumper plug
removed. However, before you assign a new system and/or user password, you must install
the jumper plug.
|
NOTE: If you assign a new
system and/or user password with the jumper plug still removed, the system disables the
new password(s) the next time it boots. |
5. Repeat
step 1.
6. Install
the jumper plug on the PASSWD jumper.
7. Replace
the right computer cover, and then reconnect the computer and peripherals to their power
sources and turn them on.
8. Assign a
new system and/or user password.
To assign a new
system password using the System Setup program, see "Assigning a System
Password" in Chapter 4 of the User's Guide. To assign a new user password using the
System Setup program, see "Assigning a User Password" in Chapter 4 of the User's
Guide.
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