Operation
2-3
Compaq Confidential – Need to Know Required
Writer: Everett Godaire Project: TL891 MiniLibrary System User's Guide Comments:
Part Number: ER-TL891-UA.A01 File Name: c-ch2 Operation Last Saved On: 3/1/99 2:14 PM
Power Switch
The power switch controls the supply of AC power to the module. It is set into
a recess in the front panel to prevent accidental operation. Press
1
to turn the
module ON and
0
to turn the module OFF.
NOTE:
The Expansion Unit must be turned on after or simultaneously with the Base
Module(s). If this is not done, the Expansion Unit may not be notified of the presence of
one or more of the Base Modules.
Control Panels
The Expansion Unit control panel, shown in Figure 2-2, consists of three LED
indicators, a four-line by 20-character backlit LCD display, and four buttons.
The Base Module control panel, shown in Figure 2-3, has four LED indicators,
Expansion Unit Indicators
There are three LED indicators on the Expansion Unit control panel, labeled
Ready
(green),
Alert
(yellow),
and
Fault
(red), that serve as follows:
■
Ready
(green) - illuminates when the system is ready to accept
commands, either from the control panel or from the host computer. The
Ready
indicator goes out when you enter the Menu Mode.
■
Alert
(yellow) - indicates that a fault or some other matter that requires
attention has occurred in one of the modules in the system. Line 2 of the
display blinks the number of the module where the fault has occurred.
The control panels of the indicated module may give a further indication
of the cause of the alert. Often, when the
Alert
LED is lit, a
Fault
LED
is illuminated on one or more of the Base Modules as well.
■
Fault
(red) - indicates that a fault has occurred in the Expansion Unit, or
that the magazine door is unable to close. When the red LED is
illuminated, a Fault Screen appears on the LCD display. The Fault
Screen is described later in this chapter. A list of fault symptom codes
(FSC) and error recovery procedures (ERP) appears in Chapter 6,
Diagnostics and Troubleshooting.
