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.
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.
CB_TYPE
AC line voltage is greater than 120 V.
AC line voltage is less than 120 V.
NOTE: This jumper is not functional for systems using a line voltage in the 200 V range.
CAUTION: Jumper CB_TYPE configures the system to match the AC line voltage if the system will operates in the 100 V–120 V range. If you relocate the system to a different geographic area, ensure that this jumper setting matches the AC line voltage range of the new location.
Table A-2 lists countries where the AC line voltage may be less than 120 V, depending on the particular location within that country.
Table A-2. Areas Where AC Line Voltage May Be Less Than 120 V
Figure A-4. Memory Module Sockets on the Memory Riser Card
SCSI Backplane Connectors
1x10 SCSI Backplane
Figure A-5. Back of SCSI Backplane
Figure A-6. Front of SCSI Backplane
Optional 1x2 SCSI Backplane
Figure A-7. 1x2 Backplane Connectors
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 be done only 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 password jumper plug.
See Figure A-2 to locate the password jumper on the system board.
NOTE: To access the jumpers, remove any expansion card installed in slot 7. See Figure A-3.
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 removed. However, before you assign a new system and/or setup password, you must install the jumper plug.
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.
Reinstall the password jumper plug in its original position to enable the password protection
feature.
If you removed an expansion card in slot 7 to access the jumper plug, reinstall the card now.
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)
