System Controller - Silicon Graphics POWER CHALLENGE User Manual

Chapter 2: Touring the Chassis

System Controller

22
Table 2-4 (continued)
Pin
12
13
14
15
16
17
18 through 25
A narrow front door on the right side of the chassis allows you to access the
System Controller front panel and install front-loading devices in the drive
rack. The System Controller panel is located just above the drive rack.
Figure 2-6 shows the location of the key switch and indicators on the System
Controller front panel.
The position of the key switch determines what mode the System Controller
is monitoring (see Figure 3-4). Press the Menu button for a display of
executable options. The Scroll Up and Scroll Down buttons allow you to
move up and down through the menu list and scroll through a 10-message
error file within the menu. Press the Execute button, and the System
Controller performs the option that is listed.
The key switch on the System Controller front panel serves two purposes:
• It turns the system boards and peripherals on and off.
• When the key switch is in the On position, and the key is removed, it
prevents unauthorized shutdown or alteration of system operations
from the control panel.
When the key switch is in the On position, no alteration of system function
can be executed from the front panel menus. If the switch is moved into the
Manager position, system operations can be modified, reset, or limited.
Centronics Compatible Parallel Port Pin Assignments
Assignment
PE (Paper Empty)
SLCT (Select)
AUTOFD
ERROR
INIT (Reset)
SLCTIN
GND