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Service Reference Guide, dx7300 433611-001 E–1
E
System Board and Riser Board Reference
Designators
These reference designators are used on most but not all HP system and riser boards.
Designator Component
BAT
CR1
CR2
CR3
CR4
Battery socket/Battery
LED - 5V_Aux (on)
Health-LED
UID LED
Power LED
CR35
E14
E15
E16
E25
E49/JP49
Hard drive activity LED
Boot block header/jumper
Boot block recovery header
ROM recovery header
CPLD programming header
Clear Password header/jumper
E50
J7
J9
J10
J11
Clear CMOS header
RJ45 jack
Stacked RJ45/Dual USB
Quad stacked USB
First IEEE 1394 connector
J12
J13
J14
J20 - 29
J30
Second IEEE 1394 connector
SPDIF input
SPDIF output
PCI slots
PCI extender slot (male)
J31 - J35
J37
J38
J39
J40
PCI Express slots
Primary SCSI connector
Secondary SCSI connector
Stacked parallel/SCSI connector
AGP slot
J41
J50
J51
J52
J53
x16 PCI Express slot for graphics
First parallel port
Second parallel port
Double-stacked parallel port, Top = Port B, Bottom = Port A
Parallel port over single Serial Port
J54
J55
J65
J66
J67
Parallel port over Serial Port and Video Port
Parallel port over dual VGA ports
DVI connector
Keyboard connector, PS/2 (Closest to power supply)
Mouse connector, PS/2