upgrading and repairing PCs technicians ... - 400 Bad Request

If you need to clean or repair a keyboard, you’ll find much more
information in Chapter 17 of Upgrading and Repairing PCs, 12th
Edition, from Que.
Adjusting Keyboard Parameters in
Windows
To modify the default values for the typematic repeat rate and
delay parameters in any version of Windows, open the Keyboard
icon in the Control Panel. In Windows 9x/Me/NT/2000, the controls
are located on the Speed tab. The Repeat Delay slider controls
the amount of times a key must be pressed before the character
begins to repeat, and the Repeat Rate slider controls how fast the
character repeats after the delay has elapsed. Use the test box to see
the effect of the changes you make before you apply them.
Note
Keyboard Layouts and Scan Codes 221
The increments on the Repeat Delay and Repeat Rate sliders in
the Keyboard Control Panel correspond to the timings given for
the MODE command’s RATE and DELAY values. Each mark in
the Repeat Delay slider adds about 0.25 seconds to the delay,
and the marks in the Repeat Rate slider are worth about one
character per second each.
Keyboard Layouts and Scan Codes
Figure 9.2 showsthe keyboard numbering and character locations
for the 101-key Enhanced keyboard. Table 9.6 shows each of the
three scan code sets for each key in relation to the key number and
character. Scan Code Set 1 is the default; the other two are rarely
used. Figure 9.3 shows the layout of a typical foreign language 102key
version of the Enhanced keyboard—in this case, a U.K. version.
Knowing these key number figures and scan codes is useful when
you are troubleshooting stuck or failed keys on a keyboard.
Diagnostics can report the defective keyswitch by the scan code,
which varies from keyboard to keyboard on the character it represents
and its location.