Technical information

1.1.2.1 Contrast Control
The contrast control is on the face of the display. To increase contrast,
move the control 2 from left to right. On some older displays, the
contrast control is on the left side. To increase contrast, move the
control from back to front.
PS/2 Displays Maintenance Manual
Contrast Control
¦ Copyright IBM Corp. 1993
1.1.2.1 - 1