IBM 3278 Series

.co
N
~
~
...
o
~
Lightl~
Light 2
Light 3
Operating mode
Test mode - displays test pattern
Audible Alarm Volume Control
On/Off Switch ---~{ ~~f I r~
\ ~ H j:: ~contrastControl
Ready Symbol - first position of operator jJ Secunty Keylock
information area:
Bl (3274). ~ (3276). or other symbol Brightness Control (I ntensity Override)
Figure 4·2. Switches and Indicators (Katakana)