Barco RLM G5 Performer, Service Manual

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11. Light Pad adjustment
11. LIGHT PAD ADJUSTMENT
Overview
• Lens Holder (Scheimpflug)
• Illumination System
11.1 Lens Holder (Scheimpflug)
Adjustment controls on the Lens Holder
The following adjustment controls and locks are provided on the front of the lens holder:
• A, B and C: 3 x M10 nuts for the adjustment of the lens position.
• 1, 2 and 3: 3 x M2.5 Allen head screw close to the M10 nuts, securing the respective adjustment screw.
• 4: Additional M2.5 Allen head screw, securing the entire lens holder to avoid vibrations in the picture.
B
A
C
1
2
4
3
Image 11-1
Adjustment controls on lens holder (lens removed)
Necessary tools
• Nut driver of 8 mm and 10 mm
• Allen key of 2.5 mm
How to adjust the lens holder
1. Put a TLD 0.8 lens (with optical adapter) or a RLD 0.8 lens into the lens holder of the projector, the latter placed at 2 m from the
screen (A lens with a fixed nominal focus position would be best, but in absence of this, you can use the TLD 0.8).
2. Ensure the projector axis is perpendicular onto the screen and the projector is leveled.
3. Looking at the screen, turn the focus barrel counterclockwise until you hit the mechanical stop.
The lens is at near focus.
4. Loosen the lens lock screws 1 to 4 (turning counterclockwise), using an Allen key of 2.5 mm and turn the screw lock nut a few
turn counterclockwise.
5. Search for the in focus picture by moving a white paper perpendicular on the projector axis (image 11-2)
In focus picture is found before the screen or not:
- Before the screen (1): turn the nuts A, B and C equally clockwise until the picture is in focus on the screen center (3).
- Not before the screen (2) (meaning in focus picture is located behind the screen) : turn the nuts A, B and C equally counter-
clockwise until the picture is in focus on the screen center (3).
R5976766 RLM G5 22/04/2004 73