Required tools

• Allen key, hex size 4
• Allen key, hex size 6

Lens distance

Distance from lens to the screen during Scheimpflug adjustment.

* With one of these lenses installed, ensure that the white dot (reference 1) on the focus ring is oriented 60 degrees counterclockwise from vertical.

Preparation

1. Prepare the test area. Barco recommends a projector-screen according to the table “Lens distance” above to be used for all Scheimpflug adjustments.

   Verify that the throw ratio of the installed lens matches the requirements of the installation area (projection distance and screen size).

2. Check that the lens is correctly installed, and lens shift is in centre position.
3. If the installed lens has Iris control, open the Iris all the way up.
4. Open the focus ring all the way up.
5. Go to Main Menu / Test Patterns / Full Screen and select to display the Focus test pattern.
6. Zoom the lens to its widest opening (maximum image size on the screen).

Apply a Scheimpflug correction

1. Loosen the three set screws (reference 1b, 2b, 3b). Use a size 6 hex key to do this.

   

2. Adjust the left side Scheimpflug adjustment screw (reference 1 in the next figure) until the test image in the top left side of the screen is in focus. Use a size 4 hex key to do this.

   

   Note: This process may cause the other areas of the image to slide out of focus. This is totally normal.

   

3. Adjust the right side Scheimpflug adjustment screw (reference 2 in the next figure) until the test image in the top right side of the screen is in focus. Use a size 4 hex key to do this.

   

   Note: This process may cause the other areas of the image to slide out of focus. This is totally normal.

   

4. Adjust the top Scheimpflug adjustment screw (reference 3 in the next figure) until the test image in the bottom half of the screen is in focus. Use a size 4 hex key to do this.

   

   Note: This process may cause the other areas of the image to slide out of focus. This is totally normal.

   

5. Continue adjusting the screws one at a time until the test image is uniformly sharp across all areas of the display.
6. Test the focus by zooming in and out, and verify that the image stays sharp during the complete zoom range. If there are any deviations to sharpness, repeat steps 2 to 6 until the image is correct.
7. Tighten the three set screws in the following order: left (1b), right (2b) and then top (3b). Use a size 6 hex key to do this.