Christie HAL Series User Manual page 74

MAINTENANCE
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DLV 1280 User's Manual
2. If the screen blacks out, it is possible that excessive voltage noise on the AC
or ground input has interfered with the projector's ability to lock on to a
signal. Turn the projector off, wait for the lamp fans to stop and unplug. Plug
in again and power up as usual.

1. Display adjustment may be required. Rotate the lens barrel to adjust for the
best focus, then adjust brightness, contrast and detail.
2. Is a BNC T-connector being used? Use a distribution amplifier to boost
signal levels.
3. The screen size may be too large. As screen size increases, magnification
increases, reducing brightness.
4. The source input signal may be of low quality.

1. The color, tint and/or color temperature settings may require adjustment
from within the Image Settings menu.

1. Are the vertical and horizontal offsets adjusted correctly for the current
throw distance? Use the offset knobs on the top of the projector and see 2.8,
Zoom, Focus and Offset for more information.
2. Is the projector lens surface parallel to the screen? See 2.7, Leveling.

1. Display adjustment may be required. Adjust pixel tracking and phase.
2. The signal cables carrying the input signal may be of poor quality. Use only
good quality signal cables. Electrohome cables are recommended.
3. The distance between the input source device and the projector may be too
great. If the distance between the input source device and the projector is
greater than 25 feet, signal amplification/conditioning may be required.
4. The input signal may be of poor quality.

1. Your projector may not have a video decoder module installed (optional on
overseas exports models). Install a DLV 1280 video decoder module.