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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.