Dell Precision WorkStation 420 Service Manual page 17

System Board Labels
Table 2 lists the labels for connectors and sockets on your system board, and it gives a brief description of their functions.
Table 2. System Board Connector and Socket Labels
Connector or Socket Label
AGP
AUX_LED
Battery
CD_IN
DISKETTE
ENET
EXT_SPKR
FAN_CCAG
FAN_SYS
HD_LED
IDEn
KEYB
LINE_OUT
LINE_IN
MIC
MONITOR
MOUSE
MPWR1
MPWR2
MTPWR1
MTPWR2
PANEL
PARALLEL
PCIn
POWER_1
POWER_2
PROC_0
PROC_1
RIMM_x
SCSI
SCSI_LVD
SCSI_NARROW
SERIAL1/2
STANDBY_LED
STR_LED
USB
TAPI
WOL
RIMMs
Description
AGP graphics card slot
Hard-disk drive LED connector
Battery socket
CD-ROM audio interface connector
Diskette/tape drive interface connector
Integrated NIC connector
External speaker connector
Card cage area fan power connector
Microprocessor fan power connector
Hard-disk drive
EIDE interface connector
Keyboard connector
External speaker connector
Audio input connector
Microphone connector
Video connector
Mouse connector
Main power 1 connector (desktop)
Main power 2 connector (desktop)
Main power 1 connector (mini tower)
Main power 2 connector (mini tower)
Control panel connector
Parallel port connector; sometimes referred to as LPT1
PCI expansion-card connector
Main power input connector
3.3-V power input connector
Primary microprocessor connector
Secondary microprocessor connector
RIMM socket
External SCSl port connector
Internal LVD SCSl connector
Internal SCSl Narrow connector
Serial port connectors
Standby power LED
Suspend-to-RAM LED
USB connectors
Modem connector
Remote Wakeup on LAN power connector