Datamax Allegro 2 - Manual (Page 13)

Getting Started
Allegro2 5
1.3 Using the Printer Control Panel
The Printer has three operator-accessible buttons, three indicators
lights (LEDs), one switch and one POT, (see Figure 1-5). A brief
description of the buttons, lights, switch and POT are listed in this
section.
Figure 1-5 Buttons, Lights and Switches
Power Light: The power light is turned on after the power switch
on the rear of the Printer is turned on.