Spu Front Panel; Front Panel Key Switch; Front Panel Status Indicators; Figure 3-2. System Cabinet Rail Locations And Device Positions - HP 3000 Installation Manual

System Installation
TOP
POSITION 1
RAIL SLOT
18
POSITION
2
RAIL SLOT 12
POSITION 3
RAIL SLOT
7
POSITION 4
RAIL SLOT
2
BOTTOM
Figure 3-2. System Cabinet Rail Locations and Device Positions
SPU FRONT PANEL
The System Processor Unit (SPU) front panel is shown in Figure 3- 3. The four-position key switch is used
to select the control modes and power distribution of the SPU. The indicator lights show what power
configuration is active and in what mode the system is running. The single digit LED display shows the
status of the SPU when the self -test routines or MPE are executing.
Front Panel Key Switch
The SPU front panel key switch is used to turn the power on and off and to select the mode of operation.
You can select either the normal mode or the maintenance mode of operation. Table 3-2 shows the key
switch positions, the modes of operation, and the associated actions.
Front Panel Status Indicators
The front panel status indicators display the state of the SPU during operation.
The AC indicator is lit if AC power is applied to the SPU. Power is applied to the battery charger. The
indicator is lit in all keyswitch positions.
The DC indicator is lit if DC power is present in the SPU. It is lit if the key switch is in positions
1, 2, or 3.
0984
3-4