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E–2 433611-001 Service Reference Guide, dx7300
System Board and Riser Board Reference Designators
J68
J69
J70
J71
J72
Stacked mouse (Top)/keyboard (Bottom) connector
Video connector, VGA
Primary single USB connector
Secondary single USB port
Microphone jack
J73
J74
J75
J76
J77
Line-in jack
Line-out jack
Headphone jack
Volume control
Double-stacked headphone (Bottom)/microphone (Top) connector
J78
J80
J81
J82
J83
Double-stacked line-in (Top)/line-out (Bottom) connector
Stacked serial/audio connector
Primary double-stack USB, Top = Port 2, Bottom = Port 1
Secondary double-stack USB, Top = Port 4, Bottom = Port 3
Triple-stacked audio jack (line in, line out/headphone, microphone)
J101
J9020-J9029
J9030-J9034
JP49/E49
L1
Security board connector - for security card
PCI slots on riser card
PCI express slots on riser card
Clear password header/jumper
USB front port choke (1st)
L2
L3
L4
L5
P1
USB rear port choke (1st)
USB rear port choke (2nd)
USB rear port choke (3rd)
USB front port choke (2nd)
P/S connector (20 or 24 pin)
P2
P3
P4
P5
P6
Second P/S connector (as required)
Processor 12V header
Secondary Processor 12V header
Main Power/HDD LED connector
Speaker connector
P7
P8
P9
P10
P11
Analog audio connector (from CD-ROM)
Primary chassis fan header or primary CPU heatsink fan
Secondary chassis fan header
Diskette drive connector
Auxiliary Audio connector
P12
P13
P15
P16
P17
Alert on LAN connector
VRM module footprint
AUI connector
Fan command/fan sink header (may be 2 or 4 pin)
Digital audio expansion header
P18
P19
P20
P21
P22
SPDIF internal input header
SPDIF internal output header
Primary IDE connector
Secondary IDE/MultiBay connector
Header for NEWCARD
Designator Component (Continued)