Christie MicroTiles User manual

MicroTiles™ Lens Cleaning Instruction Sheet 1 of 2

020-100568-01 Rev. 1 (04-2010)

MicroTiles™ Lens Cleaning

Instruction Sheet

INTRODUCTION

This document outlines the process to clean the front surface of a MicroTiles projector lens.

TOOLS REQUIRED

• Non-marking, powder-free, protective gloves

• Clean, filtered compressed air can such as ‘Dust-off’ or an equivalent brand

• Reagent-grade Isopropyl alcohol in pump-top dispenser

• Lint-free lens tissues and/or lint free cotton-tipped swabs

INSTRUCTIONS

NOTICE: Cleaning the projection lens should only be executed if absolutely necessary! Improper cleaning

can permanently damage the surface of the projection lens making it unusable for the application. Cleaning

the lens should only be considered if the optical performance of the display is considered to be affected by the

contamination on the front surface of the projection lens.

1. Remove the screen using the screen removal tool.

2. Put on the protective gloves. NOTICE: Perspiration and oil from skin contact can contaminate the lens

surface.

3. Carefully inspect the lens surface. Identify the areas where dust is visible.

4. Use a can of compressed air to blow off all dust from the lens, working from the center and moving

outward until all visible dust particles are removed. NOTICE: Make sure to release a small amount of air

from the compressed air can before using it on the lens surface and do not shake the compressed air can

while you are using it. This will ensure that no liquid is dispensed which may cause possible contaminants

to come in contact with the lens.

5. Carefully inspect the lens surface to identify any blemishes.

MicroTiles™ Lens Cleaning Instruction Sheet 2 of 2

020-100568-01 Rev. 1 (04-2010)

6. Apply a light- touch on the dish top to dispense only the required amount of Isopropyl alcohol necessary

for cleaning. Moisten the lint free tissue with the Isopropyl alcohol. Squeeze and discard any excess

alcohol from the tissue. NOTICE: Never apply the alcohol directly on the lens.

7. Gently wipe the lens surface using minimal pressure, to remove visible blemishes. Lift the tissue off the

lens surface and be careful not to apply any lateral motion in the process as this could result in scratching

the lens surface or its coatings. Continue working your way from the center of the lens outward. Discard

each tissue after a single wipe and continue with a new tissue.

8. Examine the lens surface for particles or blemishes that were not removed in Step 7. If particles or

blemishes remain, repeat Steps 6 and 7 using slightly increased pressure. Repeat as many times as are

necessary.

9. Use the compressed air can to blow away any excess dust that may have accumulated on the damp surface

of the lens during the cleaning process.

10. Install the screen on the MicroTile.

11. Display a full white test pattern: ”tp 0 0xffffff”.

12. Visually inspect the entire image to identify any visible blemishes on the screen using removable low tack

tape.

13. Remove the screen from the MicroTile.

14. Move the screen slowly in front of the display unit first in the horizontal and then in the vertical direction.

15. Monitor any change in the appearance or location of any blemishes on the screen:

• If the location of a blemish remains unchanged relative to the MicroTile, the defect is related to the

MicroTile itself.

• If the location of a blemish remains unchanged relative to the screen, then the defect is related to the

screen.

16. If it is determined that the cleaning procedures have not solved the issue, then the projection lens has

probably been damaged and light engine replacement is required.

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