Clear-Com WTR-670 - Manual (Page 28)

Display Contrast
The LCD’s (Liquid Crystal Display) contrast is set from the
factory to a standard level. However it is possible for the user
to adjust the contrast if desired. The contrast control is inter-
nal to the WBS-670 unit near the front panel. The cover must
be removed for access to this control. Please see Figure 20 for
the location.
Figure 20
LCD Contrast
6-3
V
D1
101
FRONT
BACK
R1
101