IBM 3278 Series - Chapter 4. Component Locations; Switches and Indicators Overview (Figure 4-1)

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Light 1
Light 2
Light 3
Display upper/lowercase
Display uppercase characters (but store both)
Operating mode
Test mode - displ.ys test panern
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Audible Alarm Volume Control
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Ready Symbol - first position of oper.tor ______ -1f-== .... i!it:~ Security Keylock
On/Off Switch
information area: BI (3274). ~ (3276), or other symbol Brightness Control (Intensity Override)
Figure 4·1. Switches and Indicators
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