HP 250 - Page 56

HP 2649D Workstation
Te st 2
KEYBOARD MATRIX
TEST - When this test is entered, Key Matrix is
displayed in the upper left hand corner of the screen. A 40
column by 6 row display represents the position of the keys.
tt tttt tttt
ttt t t tttt
ttttttttttttttt ttt
tttttttttttttt ttt
~ttttttttttttt ttt
t tttttttttt t t t
For every key on the keyboard (except RESUME) a vertical arrow is
displayed in a corresponding position on the screen. If a key is
pressed, the corresponding arrow on the display is changed from
an upward pointing arrow to a downward pointing arrow. When the
key is released, its arrow is changed to an upward pointing
double-headed arrow. Pressing the key again changes the arrow to
a downward pointing double-headed arrow. The progression is
shown in the following figure
t
Key up
Pressed Released Pressed Released
If the processor detects an input for a key that is not supposed
to be on the keyboard, a DEL character is displayed in the lower
right corner of this display. The visual feedback provided by
this test allows you to quickly identify malfunctioning keys or
groups of keys.
To exit the test, press the space bar once.
3-37
HP 2649D Workstation
Te st 2
KEYBOARD MATRIX
TEST - When this test is entered, Key Matrix is
displayed in the upper left hand corner of the screen. A 40
column by 6 row display represents the position of the keys.
tt tttt tttt
ttt t t tttt
ttttttttttttttt ttt
tttttttttttttt ttt
~ttttttttttttt ttt
t tttttttttt t t t
For every key on the keyboard (except RESUME) a vertical arrow is
displayed in a corresponding position on the screen. If a key is
pressed, the corresponding arrow on the display is changed from
an upward pointing arrow to a downward pointing arrow. When the
key is released, its arrow is changed to an upward pointing
double-headed arrow. Pressing the key again changes the arrow to
a downward pointing double-headed arrow. The progression is
shown in the following figure
t
Key up
Pressed Released Pressed Released
If the processor detects an input for a key that is not supposed
to be on the keyboard, a DEL character is displayed in the lower
right corner of this display. The visual feedback provided by
this test allows you to quickly identify malfunctioning keys or
groups of keys.
To exit the test, press the space bar once.
3-37