NEC EXPRESS5800/120Lf, User Manual

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System Overview 1-9
System Board Features
The system board (Figure 1-6) offers a “flat” design with the processor and memory
subsystems residing on the board. This figure shows the major components on the
system board. The following subsections describe the system board major components.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
T
S
U
V
W
X
Y
Z
AA
BB
CC
DD
EE
FF
GG
HH
II
A Rear exhaust fan connectors (fan5 and fan6) S Lithium backup battery
B Main power connector T Buzzer
C Auxiliary power connector U Media bay or external SCSI connector (SCSI B)
D CPU1 fan connector V Serial COM 2 connector
E Primary processor connector (CPU1) W Internal SCSI HDD bay connector (SCSI A)
F Secondary processor connector (CPU2) X Intrusion switch connector
G CPU +12 Volt power connector Y 64 bit, 66MHz PCI slots for add-in boards
H Memory DIMM slots Z 32 bit, 33MHz PCI slots for add-in boards
I USB connector (front panel) AA ICMB connector
J Diskette drive connector BB 64 bit, 66MHz PCI slots for add-in boards
K IDE CD-ROM connector CC CPU2 fan connector
L Front intake fan connectors (fan3 and fan4) DD LAN RJ-45 network controller connectors
M Hot swap backplane connectors EE VGA monitor port connector
N Front panel connector FF Parallel port connector
O System configuration jumper block GG Serial port connector (COM 1)
P Processor speed jumper block HH Stacked three-port USB connectors
Q HDD LED connector II Dual PS/2 keyboard and mouse connectors (top mouse,
bottom keyboard)
R Configuration jumper block
Figure 1-6. System Board