Figure 1-9. Power Distribution - Dell OptiPlex 100-Mbps Service Manual

PWRGOOD
PSON#
+5 VFP
+5 VDC
system
–5 VDC
power supply
+12 VDC
–12 VDC
P7
+3.3 VDC
optional
drive
optional
drive
3.5-inch
diskette drive
internal
hard-disk drive
internal
hard-disk drive

Figure 1-9. Power Distribution

keyboard
controller
power
management
logic
P1
POWER1
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
POWER2
main memory
P2 sockets
DIMM_A
P3
DIMM_B
DIMM_C
P4
DIMM_D
P5
MICROPROCESSOR
+2.1–3.5 VDC
P6
+3.3 VDC
2ND_CPU
+2.1–3.5 VDC
+3.3 VDC
system board
+3 VDC
battery
RTC/
NVRAM
RISER
+5 VDC
–5 VDC
+12 VDC
–12 VDC
+12 VDC
FAN
+5 VFP
PANEL
+5 VDC
FUSE
+5 VDC
USB
FUSE
+5 VDC
KYBD
+5 VDC
MOUSE
processor
core regulator
riser board
PCI1
+5 VDC
through
+12 VDC
PCI5
–12 VDC
ISA1,
+5 VDC
ISA2
–5 VDC
+12 VDC
–12 VDC
System Overview 1-11