Runco SC-1 - Manual (Page 59)

Installation
Runco SC-1 Owner’s Operating Manual 47
PRE
L
IMINAR
Y
Focus To focus the projected image:
1. Display a good test pattern appropriate
for analyzing image focus and geometry,
such as a single crosshair centered
across the image.
2. Rotate the knob as needed to produce a
tightly-focused image.
Zoom With the projector in its permanent location, turn the lens zoom
ring on the primary lens to enlarge or shrink the image in each
direction as necessary.
Horizontal and Vertical
Lens Shift Using a 4.0-mm hex wrench, turn the horizontal offset knob as necessary so that the
image fills the screen area with no keystoning.
To access the vertical offset knob from the front of the projector, remove the round, black
plastic cover just below the lens; see Figure 3-25. Turn the knob by hand to adjust the
vertical image position. For best results, avoid extreme offsets characterized by corner
vignettes on a white test pattern.
Figure 3-25. Horizontal and Vertical Lens Shift Controls
For more vertical offset range, you can tilt the projector to compensate for significant
differences in screen and lens height; refer to Tilting the Projector on page 31.
Vertical Offset Control
(remove plastic cover to access)