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Service Reference Guide, dx7300 433611-001 E– 3
System Board and Riser Board Reference Designators
P23
P24
P25
P26
P27
Header for front panel audio
Header for front panel USB
Internal USB connector 1
Internal USB connector 2
MultiBay header
P29
P30
P40
P41
P52
SCSI LED connector
PCI extender slot (female)
Blade PC graphics connector (outboard)
Blade PC graphics connector (inboard)
Second serial port
P54
P55
P58
P60
P61
Primary serial port
Double stack serial port, Top = Serial B, Bottom = Serial A
Riser edge connector (male-mates with J30)
Primary Serial ATA (SATA) connector
Second Serial ATA (SATA) connector
P62
P63
P64
P65
P66
Third Serial ATA (SATA) connector
Fourth Serial ATA (SATA) connector
VSFF expansion connector
Graphics option connector
Fifth Serial ATA (SATA) connector
P67
P68
P69
P70
P71
Sixth Serial ATA (SATA) connector
Seventh Serial ATA (SATA) connector
Eighth Serial ATA (SATA) connector
Primary (CPU) fan header for fansink
Secondary CPU fan header for fansink
P80
P81
P82
P83
P84
Primary Serial Attached SCSI (SAS) connector
Second Serial Attached SCSI (SAS) connector
Third Serial Attached SCSI (SAS) connector
Fourth Serial Attached SCSI (SAS) connector
Fifth Serial Attached (SAS) connector
P85
P86
P87
P101
P106
Sixth Serial Attached (SAS) connector
Seventh Serial Attached (SAS) connector
Eighth Serial Attached (SAS) connector
Security board connector, system board
Secondary speaker connector
P124
P125
P126
P150
P216
SW2
Hood lock header
Hood sensor header
Flying parallel port header
Media reader header
White box chassis fan header
Security hood switch on riser card
SW50
U2
U3
U4
U5
Clear CMOS switch/push button
Single chip solution (combined northbridge/southbridge)
North bridge
South bridge
Super I/O
Designator Component (Continued)