3278 Operator Controls 
On/Off 
(  I / 0  ) 
Switch 
The 3278 On/Off (  I / 0  ) switch 
is 
separated from the brightness and con-
trast controls (see Figure  5-2).  This reduces the possibility 
of 
accidentally 
turning the display station off.  To turn the 3278 on, press the top portion 
m 
of 
the switch.  Light 3 and Light 1 should turn on when you press the 
On/Off switch.  After a delay 
of 
a 
few 
seconds, (1) Light 2 turns on, (2) the 
cursor appears in the first position 
of 
line 1, (3) a horizontal line appears 
across the lower portion 
of 
the screen, and (4) a Ready symbol (see Chapter 
2) appears in the lower-left portion 
of 
the screen in an area called the Operator 
Information Area. 
If 
your display station has the Security Keylock feature and the keylock 
is 
locked, 
the)( 
0-., 
symbol appears at the 
bottom 
of 
the screen in the 
Operator Information Area. 
Note:  The 
key 
lock turns 90
0 
(vertical to horizontal position) when 
you 
turn 
the key. 
When you are ready 
to 
turn 
off 
your display station, press the bottom portion 
\QI 
of 
the On/Off switch. 
Ready  Symbol 
(when attached 
to 
a 3276) 
Figure 5-2.  3278 Operator Controls and Lights 
~
• 
(A,a/A) Switch 
I  Dual/Mono 
Case 
6 "  NormalfTest 
Switch 
@tt 
Audible Alarm 
Volume Control 
.. 
'$ecurity 
Keylock 
Contrast Control 
Brightness Control 
Chapter 
5. 
Differences between the 3275/3277 and the 3278 
5-5