Dell OptiPlex G1, Service Manual

Page: 37 / 144

System Overview 1-27
)LJXUH'&3RZHU'LVWULEXWLRQIRUWKH0LQL7RZHU&RPSXWHU
–12 VDC
power
management
and NIC logic
P7
+3.3 VDC
POWER1
system
power supply
RTC/
NVRAM
+3.3 VDC
+5 VDC
+5 VDC
+5 VDC
+5 VDC
+5 VFP
+12 VDC
–12 VDC
+5 VDC
–5 VDC
+12 VDC
–12 VDC
+5 VDC
–5 VDC
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
PWRGOOD
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
+3 VDC
keyboard
controller
P3
+5 VDC
+12 VDC
–12 VDC
+12 VDC
3.5-inch
diskette drive
battery
P1
ISA1
through
ISA4
PCI1
through
PCI5
MICROPROCESSOR
PANEL
KYBD
MOUSE
DIMM_A
main
memory
sockets
P4
FAN
RISER
internal
hard-disk drive
P2
optional
drive
P5
P6
riser board
system board
optional
drive
internal
hard-disk drive
processor
core regulator
POWER2
core VCC +2.1 to +3.5 VDC
USB
+3.3 VDC
P9
optional
drive
P1
+5 VFP
DIMM_B
NOTE: +5 VFP is routed to
the optional integrated NIC
logic on the system board
and to P1 on the riser
board.
fuses (2)