System Board Features - NEC EXPRESS5800/120Re-2 Service Manual

System Board Features

The system board (Figure 1-3) 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.
U
T
S
A Rear serial port connector
B Internal SCSI connector (connected to the
SCSI backplane)
C ICMB connector
D PCI riser slots (For low-profile boards. 66
MHz/64-bit, 3.3V, PCI)
E IPMB connector
F DIMM sockets
G Processor sockets. G-1 is Processor #1
(CPU #1); G-2 is Processor #2 (CPU #2).
H Processor power connector
I System fan connector
J Main power connector
K Power signal connector
A B C D E
R Q P O
L
M
N
O
P
Q
R
S
T
U
Figure 1-3. System Board
F
N M
Lithium battery
Front serial port connector
FDD/CDROM front panel connector
Configuration jumper switch
Front panel USB connector
PCI riser card slot (For full-length boards,
100MHz/64-bit, 3.3V, PCI-X)
Hard disk drive access lamp pin header
Speaker
Jumper (J5A2)
Connectors for external devices
G-2
G-1
H
I
J
L K
System Overview 1-7