7800 SERIES S7800A KEYBOARD DISPLAY MODULE
65-009
0-6
 8
RUN 
T
otal Cycles 
RUN 
Total Hours 
1332 
333 
PILOT
IGN
00:10
PILOT 
IGN 
00:05
 
H1
Fault
Cycle
Fault 
History
 
174
 
M24165 
Fig. 9. S7800 Keyboard Display 
Module.
 
Keyboard Functions 
The keyboard contains four push-buttons with separate 
functions (SCROLL-down, SCROLL-up, MODE, and 
CHANGE-LEVEL). The MODE and CHANGE-LEVEL, when 
pressed together, provide a SAVE function. When in the Setup 
Screen-Mode
 
and Change Level serves as Menu or Enter.
 
1.  Down-up arrow push-buttons. See Fig. 10. The down-up 
arrow push-buttons are used to scroll through the 
selectable messages. The double-headed arrow (  ), 
which is located in the lower left position of the second 
line of the display, represents the down-up push-buttons.
 
The down-up push-buttons can be pressed to display the 
selectable messages one at a time or held down to scroll 
through the selectable messages at the rate of two per 
second. When the last item of the selectable message is 
viewed, the display wraps around and displays the first 
selectable 
message again. 
2.  The   push-button, see Fig. 11. The   push-button is 
used to change between the first hierarchy of selectable 
messages to a subset of selectable messages. The 
push-button can also be used to change from a subset 
message to a first level selectable message. The symbol 
located on the second line 
in the lower right corner of the 
display, represents a subset of selectable messages. 
3.  BACK push-button, see Fig. 12. Use the BACK 
push-button to instantaneously switch the display from a 
second-line selectable message to a second-line 
preempted message. The sixty second time-out function 
can also be used for this task. The BACK push-button 
only works if there is a second-line preempted message 
or a lockout message. 
Fig. 10.     Push-button 
function.
 
M22871 
M22872 
Fig. 11.  push-button 
function.