IBM 6580 User Manual

KEYBOARD OPERATIONAL THEORY
The IBM Displaywriter System uses two
styles of the standard 92 and 96 char-
acter electronic keyboards"Type A and
Type B. Optional keyboard arrange-
ments including the Dvorak keyboard
are available and will be simulated
using the touch type method. Some key
positions are typamatic. The major
Type A keyboard components are the
logic card, pad card, key modules and
the keyboard cable (Figure 5-1). The
Type B
keyboard components are the
keyboard common sub-assembly (eSA)
which includes keybuttons, the key-
board cable and the speaker assembly
(Figure 5-2).
The operator controls the system and
inputs data through the keyboard.
Operator feedback is provided by the
display and keyboard speaker. The
display produces visual feedback, and
the speaker electronically produces a
clicking sound as an audio feedback
when a key is pressed. The Type B
speaker provides the operator with
volume control.
The keyboard is connected to the sys-
tem electronics by the keyboard cable
which plugs into panel 1 on the back
of the electronics module
(Figure 5-3). The necessary voltages
and signals are supplied by the elec-
tronics module, and the cable allows
placement of the keyboard for individ~
ual operator comfort.
Common
Subassembly
1l'
I 1l'
I I
l..a~~~/-'/~
~~~itl
I
, C c<VV'~i,t:!'-~---+--~ Speaker
,,/><Y Assembly
I
Figure 5-2. Type B Keyboard Assembly
5-2 IBM Displaywriter Product Support Manual

IBM 6580 Specifications

General

Brand	IBM
Model	6580
Category	Desktop
Language	English