Casio QT-2000 Service Manual page 52

(4) Keyboard test
The display shows pressed button number when the key switch functions correctly.
Operation: [0][5][SUB TOTAL]
Press buttons and make sure that the pressed button number is displayed on the LCD.
Note:As [ESC] (button number159) button exits the diagnosis program, press [ESC] at the end.
Display: <LCD>
R/J Print:
KEY
END
<Button numbers>
KEY 05
KEY –– 26
KEY –– 27
KEY –– 28
KEY –– 29
KEY –––30
05
05
<Dot/7-segment>
Dot/7-segment display indicates 0 only when
the test is continued from the "Dot/7-segment
display test." When the test is performed
indipendently, the dot/7-segment display indi-
cates nothing.
"END
printed when [ESC] (button number
159) is pressed.
— 50 —
0
05" will be displayed and
Press this button at the
end.