Installation manual

7. Optical Adjustment
OverView D 50" – DOC-3303-5 – installation manual – Revision 11 – November 2006
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7-12
7.13 Vertical picture shift
The vertical picture shift may look like this or similar:
Figure 7-20
Rear view vertical picture shift
Use the adjustment screws for vertical lens shift Figure 7-6 [D]. Tighten the top and loosen the lower screw to
move the picture downwards
Figure 7-21
Use the adjustment screws for vertical lens shift Figure 7-6 [D]. Loosen the top and tighten the lower screw to
move the picture upwards
7.14 Locking the Projection Unit
After the adjustment procedures the projection unit must be locked.
• Turn the lock ring counterclockwise until it does not move any more. ( don’t tighten this ring too strong)
• Lock the zoom and the focus adjustment by means of the fixation screws.
• Tighten carefully the four securing screws of the lens.
• Check if the position of the picture didn’t change while locking the projection unit.