Section
4
Display Systems
4-5
Symptom:
The upper portion of the display is waving, tearing, or jittering.
Cause/Remedy:
1. This sometimes occurs when the source is a VCR or video signal. Change the sync mode by
selecting the fast/slow sync option from the Picture Adjust menu ([
PIC
] [
5
]).
Symptom:
The upper or lower portions of the display are cut off.
Cause/Remedy:
1. A top or bottom blanking adjustment may be required. Select the appropriate blanking
adjustment option from the Picture Adjust Menu ([
PIC
]) then adjust the amount of blanking.
Note:
A 0% slidebar level indicates no blanking.
2. A phase adjustment may be required. Select Phase from the Picture Adjust menu ([
PIC
]).
Adjust phase so that the entire picture is visible and centered.
Symptom:
One side of the display is cut off.
Cause/Remedy:
1. A left or right blanking adjustment may be required. Select the appropriate blanking
adjustment option from the Picture Adjust menu ([
PIC
]) then adjust the amount of blanking. A
0% slidebar level indicates no blanking.
2. A phase adjustment may be required. Select Phase from the Picture Adjust menu ([
PIC
]).
Adjust phase so that the entire picture is visible and centered.
3. The retrace time of the projector may be longer than the horizontal blanking time of the
signal. Press [
UTIL
] [
1
] [
8
] to change projector retrace time to Short.
Symptom:
Transitions between colors are fuzzy.
Cause/Remedy:
1. Convergence may require adjustment. Perform a convergence on the selected source.
2. The projector may not be optically aligned for the installation. Has the throw distance
changed significantly since the last optical alignment? If so, have the projector re-aligned.
Refer to Section 2.5..
Symptom:
The display is very faint.
Cause/Remedy:
1. Contrast or brightness settings may be set too low.
2. The projection room may be too bright. Lower the intensity of projection room lighting. Reduce light
reflections as much as possible.
3. The projection room walls and ceilings may be too reflective. Reflective ceilings, walls, and floors
should be kept to a minimum. The best projection rooms are dark with matte finishing.
4. The projector may be too far from the screen.
5. The location of the audience with respect to the screen may not be adequate. Make sure the
audience is within the viewing angle set by the projector and screen position, and the screen type.
6. The phase setting may require adjustment. Select Phase from the Picture Adjust menu ([
PIC
]) then
determine if adjustment improves the display.
7. The source may be double terminated. Ensure the source is terminated (75
Ω
) only once.
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