Dell OptiPlex N Service Manual (.pdf) - Page 15

DC Power Distribution, riser board

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keyboard controller system board +3 VDC power management RTC/ logic NVRAM battery computer power supply P1 PWRGOOD PSON# +5 VFP POWER_1 PSON# +5 VFP +5 VDC +12 VDC -12 VDC +5 VDC +12 VDC -12 VDC P2 POWER_2 +3.3 VDC +3.3 VDC +5 VDC +12 VDC -12 VDC RISER riser board +3.3 VDC +5 VDC +12 VDC -12 VDC PCI1 internal P3 hard-disk drive +12 VDC FAN main memory sockets DIMM_A DIMM_B +5 VFP +5 VDC PANEL +5 VDC USB +5 VDC KYBD +5 VDC MICROPROCESSOR processor core regulator +3.3 VDC core VCC +2.1 to +3.5 VDC MOUSE fuses (2) Figure 1-10. DC Power Distribution System Overview 1-9

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System Overview
1-9
Figure 1-10.
DC Power Distribution
+5 VDC
+3.3 VDC
fuses (2)
core VCC +2.1 to +3.5 VDC
+3.3 VDC
power
management
logic
RTC/
NVRAM
+5 VDC
+5 VDC
+5 VDC
+5 VFP
+12 VDC
–12 VDC
+3 VDC
P2
+3.3 VDC
PWRGOOD
P1
POWER_1
PSON#
+5 VFP
+5 VDC
+12 VDC
–12 VDC
PSON#
+5 VFP
+5 VDC
+12 VDC
–12 VDC
P3
+12 VDC
+12 VDC
–12 VDC
computer
power supply
keyboard
controller
battery
+3.3 VDC
+5 VDC
PCI1
MICROPROCESSOR
PANEL
KYBD
MOUSE
DIMM_A
DIMM_B
main memory
sockets
FAN
RISER
riser board
system board
POWER_2
processor core
regulator
+5 VDC
USB
internal
hard-disk drive