Figure 1-18. Dc Power Distribution For The Mini Tower Computers - Dell OptiPlex GXi Service Manual

P1
PWRGOOD
PSON#
+5 VFP
system +5 VDC
power supply
–5 VDC
+12 VDC
–12 VDC
P7
+3.3 VDC
P2
internal
hard-disk drive
P3
internal
hard-disk drive
P4
3.5-inch
diskette drive
P5
optional
drive
P6
optional
drive
P9
optional
drive

Figure 1-18. DC Power Distribution for the Mini Tower Computers

keyboard
controller
+3 VDC
power
management RTC/
NVRAM
logic
POWER1
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
POWER2
main memory
sockets
DIMM_A
DIMM_B
fuse
DIMM_C
DIMM_D
processor
MICROPROCESSOR
core regulator
+3.3 VDC
core VCC +2.1 to +3.5 VDC
system board
riser board
battery
+3.3 VDC
+5 VDC
+12 VDC
–12 VDC
RISER
+5 VDC
+5 VDC
–5 VDC
–5 VDC
+12 VDC
+12 VDC
–12 VDC –12 VDC
+12 VDC
FAN
+5 VFP
PANEL
+5 VDC
+5 VDC
USB
+5 VDC
KYBD
+5 VDC
MOUSE
PCI1
through
PCI5
ISA1
through
ISA4
System Overview 1-19