Service manual

2-2 AlphaServer GS80/160/320 Service Manual
2.1 Operator Control Panel
The control panel is located at the top of the power cabinet.
2.1.1 Control Panel Assembly
The control panel assembly has a three position On/Off switch, three
pushbuttons, three status LEDs, and an ASCII/graphical vacuum
fluorescent display.
Figure 2–1 Control Panel
PK0621
2
1
3 4
9 108
6
5
7
Users control the basic state of the system by use of pushbuttons and a
keyswitch on the operator control panel (OCP). LEDs and a fluorescent display
provide visual evidence of the system state.
Only the system control manager (SCM) in the system has access to the OCP.
If the user changes the system state by pushing a button or turning the switch,
the SCM communicates those changes to the system over the console serial bus
(CSB) and through shared RAM on the standard I/O module to notify the SRM
console and the operating system. The system responds accordingly.