IBM 6360 User Manual

Type A Key Modules
Keyboard data is produced by pressing
on mechanical key modules mounted in
openings in the keyboard chass is .
Each module has a fly plate which con-
tacts a set of capacitor plates on the
pad card. Pressing the key moves the
fly plate away from the capacitor
plates (Figure 5 -4), causi~g a change
in the electrical condition of the
capacitor plates. This electrical
change is sensed by the keyboard elec-
tronics and is transmitted to the
system electronics.
All key modules except the shift-lock
module are the push/release type which
operate when pressed and return to
their normal position when released.
The shift-lock is a push/release key
module without a compression spring
that remains in the down position by
the action of the flat spring and the
fly-plate spring. It is restored by
pressing either shift key
(Figure 5-5).
All key positions on the pad .card are
either typamatic or make/break. These
keys cause the keyboard electronics to
transmit data to the system when the
key is pressed, and also when it is
released. Make/break:keys include the
SHIFT, SHIFT LOCK, CODE, and control
keys.
The functions of the control key are
explained later in this section- and in
the Diagnostic section.
The SHIFT and CODE keys, when pressed
and held while operating another key,
will provide additional functions.
These functions include the upper case
characters and the function indicated
on the front of the key.
Pressing and holding a typamatic key
activates the repeat condition of that
character or operation and the charac-
ter will repeat at approximately 14
characters/second. Releasing the key
or. pressing another typamatic
Fly Plate
No Clearance
At Rest
Normal
I
Clearance
Fully
Pressed
Compression
Spring
Capacitor Plates
Pad
Card
Capacitor
Plates
Figure 5-4. Key Module Operation
(non-make/break) key will cause the
repeat action to stop. All
non -make/break keys are typamatic at
5-4 IBM Displaywriter Product Support Manual

IBM 6360 Specifications

General

Brand	IBM
Model	6360
Category	Desktop
Language	English