Dell PowerEdge 6600 User Manual download pdf (Page 2)

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Jumpers and Connectors  
Dell™PowerEdge™6600SystemsInstallationandTroubleshootingGuide 
Jumpers—AGeneralExplanation 
I/O Riser Card Jumpers and Connectors 
I/O Board Connectors and Buses 
Microprocessor Board Connectors 
SCSI Backplane Board Connectors 
Peripheral Riser Card Connectors 
Disabling a Forgotten Password 
 
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 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 the system board. You may also need to change jumper 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. FigureA-1 shows an 
example of a jumper. 
Figure A-1. Example Jumpers  
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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A-2 shows the location and default settings of the jumper blocks on the system board. See TableA-1 for the designations, default settings, and 
functions of the system's jumpers. 
I/O Riser Card Jumpers and Connectors 
FigureA-2 shows the location of the configuration jumpers and connector on the I/O riser card. TableA-1 and TableA-2 list the jumpers and connectors. 
Figure A-2. I/O Riser Card Components  
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CAUTION: Make sure the system is turned off before you change a jumper setting. Otherwise, damage to the system or unpredictable results may 
occur. 
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