Keypad Special Functions
The keypad special functions are color coded on the keypads. For example, on the 53-key keypad, the display
backlight icon is blue indicating that the blue function key must be selected first to access the display backlight.
On the 43-key keypad, the display backlight icon is white indicating that the display backlight is the default
value for that key.
Keypad Special Functions
Table 2-14
28-Key
Icon
Keypad
Blue key
Blue key +
+ #
7
Blue key
Blue key +
+ 0
4
Blue key
Blue key +
+ 1
8
Blue key
Blue key +
+ 4
5
Blue key
Blue key +
+ 3
9
Blue key
Blue key +
+ 6
6
Blue key
Blue key +
+ CTRL
CTRL
Not
Not
available
available
NOTE Use of display and keypad backlighting can significantly reduce battery life. Mobile computers with color
screens do not have contrast settings.
38-Key
33-Key
Alpha/Shifted
Keypad
Numeric
Keypad
Blue key + V
Blue key + Y
Blue key + A
Blue key + E
Blue key + D
Blue key + H
Blue key + X
Blue key + U
38-Key
Numeric/
43-Key
Function
Keypad
Keypad
key
key
key
key
Blue key + F1
Blue key +
F1
Blue key + F5
Blue key +
F5
Blue key + F4
Blue key +
F4
Blue key + F8
Blue key +
F8
Blue key +
Blue key +
CTRL
CTRL
Not available
Not available
Operating the MC909X 2 - 47
53-Key,
3270, 5250,
Special Function
VT Keypad
Blue key + Z
Turns on and off the
display backlight.
Blue key + X
Turns on and off the
keypad backlight.
Blue key +
Monochrome units:
D
Increases display
contrast.
Color units:
Increases display
backlight intensity.
Blue key + I
Monochrome units:
Decreases display
contrast.
Color units:
Increases display
backlight intensity.
Blue key +
Increases scan
H
decode beeper
volume.
Blue key +
Decreases scan
M
decode beeper
volume.
Blue key +
Enables Alt keypad
CTRL
functions.
Not
Sends TAB
available
character (forward
tab).