This section provides specific information about the system jumpers. It also provides some basic information on jumpers and switches and describes the connectors on the various boards in the system.
Jumpers—A General Explanation
Jumpers 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 circuit boards 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. Figure A-1 shows an example of a jumper.
Figure A-1. Example Jumper
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 with a triangle so that you can identify each pin number based on the location of pin 1.
Figure A-2 shows the location and default settings of the server-module jumper blocks. See Table A-1 for the designations, default settings, and functions of the jumpers.
System Board Jumpers
Figure A-2 shows the location of the configuration jumpers on the system board. Table A-1 lists the jumper settings.
NOTE: To access the jumpers, remove any expansion cards installed in slots 6 and 7. See Figure A-3.
Figure A-2. System Board Jumpers
Table A-1. System Board Jumper Settings
Jumper
Setting
Description
PASSWD
(default)
The password feature is enabled.
The password feature is disabled.
NVRAM_CLR
(default)
The configuration settings in NVRAM are retained at system boot.
The configuration settings in NVRAM are cleared at next system boot.
System Board Connectors
See Figure A-3 and Table A-2 for the location and description of the system board connectors.
Figure A-3. System Board Connectors
Table A-2. System Board Connectors
Connector
Description
BATTERY
Connector for the 3.0-V coin battery
BKPLN SIG
Backplane interface cable connector
PROC_n
Processor connector (4)
CPU3 VRM, CPU4 VRM
Voltage regulator modules (VRMs) for processors 3 and 4
See Figure A-4 for the location of the connectors on the memory riser card.
Figure A-4. Memory Riser Card Connectors
SCSI Backplane Connectors
See Figure A-5 for the location and description of the connectors on the back of the SCSI backplane board.
Figure A-5. Connectors on Back of SCSI Backplane
Disabling a Forgotten Password
The system's software security features include a system password and a setup password, which are discussed in detail in "Using the System Setup Program" in your User's Guide. The password jumper enables these password features or disables them and clears any password(s) currently in use.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
Remove the expansion card from expansion slots 6 and 7, if installed. See "Expansion Cards"
in "Installing System Components."
Remove the password jumper plug from pins 1 and 2 and place it on pins 2 and 3.
See Figure A-2 to locate the password jumper on the system board.
Replace the expansion cards in expansion slots 6 and 7, if removed. See "Expansion Cards" in
"Installing System Components."
Close the system. See "Closing the System" in "Troubleshooting Your System."
Reconnect the system to the electrical outlet, and turn on the system.
The existing passwords are not disabled (erased) until the system boots with the password jumper plug on pins 2 and 3. However, before you assign a new system and/or setup password, you must install the jumper plug on pins 1 and 2.
NOTE: If you assign a new system and/or setup password with the jumper plug still removed, the system disables the new password(s) the next time it boots.
Turn off the system, including any attached peripherals, and disconnect the system from the
electrical outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
Remove the expansion cards from expansion slots 6 and 7, if installed. See "Expansion Cards"
in "Installing System Components."
Reinstall the password jumper plug on pins 1 and 2 to enable the password protection feature.
Replace the expansion cards in expansion slots 6 and 7, if removed. See "Expansion Cards" in
"Installing System Components."
Close the system, reconnect the system to the electrical outlet, and turn on the system.
Assign a new system and/or setup password.
To assign a new password using the System Setup program, see "Using the System Setup Program" in your User's Guide.
(default)
(default)
