Runco Reflection - Manual (Page 53)

Operation
Runco CL-410 and CL-420 Owner’s Operating Manual 43
Keystone Correction: If the projector and screen are not installed perpendicular to each
other, the image may become distorted in a trapezoidal shape, as shown in Figure 4-10.
Select Keystone from the Installation menu to compensate for this.
Figure 4-10. Horizonal and Vertical Keystone Correction
Fan High Speed Mode: If the projector is being used in a high-altitude environment, use
Fan High Speed Mode to prevent it from overheating. Set Fan High Speed Mode to ON to
run the fan at high speed; set it to OFF to run the fan at normal speed.
1. The CL-410/CL-420 keystone correction can compensate for up
to approximately 15 degrees of screen and/or projector tilt.
2. Straight lines or the edges of images may appear jagged while
adjusting the image.
3. Keystone correction is not possible with a 1080i input signal.
Vertical Keystone Correction
Horizontal Keystone Correction
Projector Projected Image
Positive values compress top;
negative values compress bottom.
Positive values compress right side;
Negative values compress left side.
Note