Dell OptiPlex GL Service Manual - Page 19

Power Distribution, core regulator

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keyboard controller system board +3 VDC system power supply P1 PWRGOOD PSON# +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC POWER1 power management logic PSON# +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC RTC/ NVRAM battery RISER +5 VDC -5 VDC +12 VDC -12 VDC riser board +5 VDC +12 VDC -12 VDC +5 VDC -5 VDC +12 VDC -12 VDC PCI1 through PCI5 ISA1, ISA2 P7 +3.3 VDC POWER2 +12 VDC FAN optional P2 drive optional P3 drive P4 3.5-inch diskette drive P5 internal hard-disk drive P6 internal hard-disk drive main memory sockets DIMM_A DIMM_B DIMM_C DIMM_D MICROPROCESSOR +2.1-3.5 VDC +3.3 VDC +5 VFP +5 VDC FUSE +5 VDC FUSE +5 VDC +5 VDC processor core regulator 2ND_CPU +2.1-3.5 VDC +3.3 VDC PANEL USB KYBD MOUSE Figure 1-9. Power Distribution System Overview 1-11

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System Overview
1-11
Figure 1-9.
Power Distribution
P3
+5 VDC
+12 VDC
–12 VDC
+12 VDC
+12 VDC
–12 VDC
3.5-inch
diskette drive
system
power supply
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
PWRGOOD
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
power
management
logic
keyboard
controller
battery
+3 VDC
P1
POWER1
+5 VDC
–5 VDC
+12 VDC
–12 VDC
+5 VDC
–5 VDC
ISA1,
ISA2
PCI1
through
PCI5
MICROPROCESSOR
+5 VDC
+5 VDC
+5 VDC
+5 VDC
PANEL
USB
KYBD
MOUSE
DIMM_A
DIMM_B
DIMM_C
DIMM_D
main memory
sockets
P4
FAN
RISER
internal
hard-disk drive
P2
optional
drive
P5
P6
+5 VFP
RTC/
NVRAM
P7
+3.3 VDC
2ND_CPU
riser board
system board
optional
drive
internal
hard-disk drive
POWER2
+3.3 VDC
processor
core regulator
+2.1–3.5 VDC
+3.3 VDC
+2.1–3.5 VDC
FUSE
FUSE