Installation
Runco SC-1 Owner’s Operating Manual 63
PRELIMINARY
• Black Levels and Drives: To check your image and adjust these controls:
1. Make sure overall “Contrast” and “Brightness” settings are both set to near 50. (Not
required for “Auto Input Level” adjustment.)
2. Check the color temperature setup using an internal grayscale test pattern, making
sure to obtain a neutral grayscale. (Not required for “Auto” adjustment.)
3. If the blacks and/or whites appear OK, input levels do not need adjustment. If black
levels are too high (and/or whites are too low, which is rare), you likely have a noisy
source that is producing skewed input levels. Continue with Step 4.
4. Temporarily enable “Auto” in the Input Levels submenu. Wait for all six values to
stabilize. Alternatively, do not use “Auto” — reduce black levels manually instead.
Judge by eye and change one or more of the six levels as necessary to obtain
proper blacks and whites. You may want to see only a certain color while adjusting;
if so, use the “Color Enable” option (described below).
5. Delete the “Auto” check mark and exit the Input Levels menu.
• Auto Color Enable: When a check mark is present, selecting a specific black level or
drive to adjust will automatically enable the corresponding color in the display. Delete
the check mark to see all colors.
• Clamp Location: This option (formerly known as sync tip clamping) can brighten the
image produced from certain high-resolution, high-frequency graphic sources. For
almost all sources, the best clamp location is automatically selected by the projector.
• Use the normal Back Porch location if the image is either sufficiently bright or overly
bright.
• Select Sync Tip if the image appears unusually dim, if there are horizontal streaks
across the image, or if there is significant color drift. This moves the clamping pulse
from the normal back porch location (which is likely too short) to the tip of the
horizontal sync pulse.
•Tri L eve l is typically recommended for an HDTV source where the back porch is
also short, or for video sources or any RGB source with sync information included
on the video (for example, sync-on-green).
• Color Enable: Select which color or colors you want to see in the display. This is
useful while working with color temperature white levels or input levels.
When you have finished calibrating Input 1, change the Display Device Input Source to DVI
(Input 2) if that input will be used; refer to Selecting the Input Source on page 46. Then,
repeat the procedure described in this section (starting with Channel Setup) for Input 2.
After calibrating projector Input 2, proceed with the next section, Working With the
Lamp.