Service manual

System Overview 1-7
➊ System card cage holds the system motherboard, the CPU, memory, bridge, and
power control modules.
➋ PCI/EISA card cage holds the PCI/EISA motherboard for PCI/EISA 0 and PCI
1, option cards, and server control module.
➌ Server control module holds the I/O connectors and remote console.
➍ Control panel assembly holds the control panel, a floppy, and a CD-ROM.
➎ Power and cooling section contains one to three power supplies and three fans.
➏ PCI card cage holds the PCI motherboard for PCI 2 and PCI 3.
Cover Interlocks
The system drawer has four cover interlocks: one for each section of the drawer.
Figure 1-6 Cover Interlock Circuit
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PKW-0403K-96
4 Cover
Interlock
Switches
To OCP
OCP
Logic
OCP
Switch
Power Supply
B
B
3
3
0
0
4
5
0
0
00
POWER_FAULT_L
PCM
Motherboard
17-04217-01
17-04201-02
DC_ENABLE_L
RSM_DC_EN_L
SCM
17-04201-01
Or
17-04302-01
17- 41
9
6- 1
4Cover
Interlocks
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