Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
51 32-00110—05
More diagnostic lines exist than can fit on the main body of the page so the up and down arrow buttons are used to scroll
among the lines. The left arrow button is used to exit this page and return back to the Display setup menu.
An additional selection line exists on the page to allow for LCD diagnostics to be initiated for checking the LCD hardware
(see Fig. 81). The right arrow or OK button is used when this LCD diagnostics line is selected navigates to the LCD
diagnostics page. One of the following tests can be conducted:
• All pixels ON (white display)
• All pixels OFF (black display)
• Fixed dots (every other pixel is on)
Fig. 81. LCD diagnostics test
The up and down arrow buttons are used to scroll through the different test selections. The right and left arrow buttons
are used to tab to the “Start test” options, “Yes” and “No”. When the input focus is on the “Start test” options the up and
down arrow buttons scroll between “Yes” and “No”. Pressing the OK button when the “Yes” option is selected begins the
LCD test. The LCD test displays until the user presses any button to return back to the test selection page. Pressing the
OK button when the “No” option is selected exits this page and returns back to the Display diagnostics page.