Compaq Portable II Maintenance And Service Manual page 117

only while the computer is in a high resolution text mode.
Figure 8-25 for the location of both control potentiometers.)
NOTE: Do not use excessive force when making adjustments on the video
display unit.
13. Use the CTRL + ALT + < command to place the display in the low
resolution graphics mode.
pressing the less than (<) key.
adjustment tool, adjust the master height control potentiometer so that
all characters appear at the desired height.
NOTE: Do not use excessive force when making adjustments on the video
display unit.
14. Use the CTRL + ALT + > command to place the display in the high
resolution mode.
the greater than (>) key.
adjustment tool, adjust the high scan height control potentiometer so
that all characters appear at the desired height.
15. If characters near the top of the display appear taller or shorter than
those near the bottom of the display, a linearity adjustment is
necessary. Using the VDU adjustment DIAGNOSTIC program, fill the
screen with capital Es (Figure 8-24 above).
for more information on the VDU adjustment program.
16. Using a plastic adjustment tool, turn the vertical linearity control
potentiometer until all characters appear equal in height.
NOTE:
o This adjustment may affect the character height enough to warrant a
readjustment for character height.
Press and hold the CTRL and ALT keys while
Then release all three keys.
Press and hold the CTRL and ALT keys while pressing
Then release all three keys.
(Refer to
Using the
Using the
See Chapter 4 in this guide