14. Maintenance
14.6 Cleaning the lens
To minimize the possibility of damag e to optical co atings, or scratches to lens surfaces follow the cleaning
procedure as described here precisely.
Necessary tools
• Compressed air.
• Clean Tora ysee® cloth or any micro fiber lens cleaning cloth.
• Clean cotton cloth.
Necessary parts
Lens c leaner (e.g. Carl Zeiss lens cleaner or Purasol® or any water-based lens cleaner)
How to clean the lens?
1. B low off dust with clean compressed air (or pressurized air cans
5
).
2. Clean with lens cleaner together with a clean lens cleaning cloth to remov e t he dus t and contam ination. Use bi
g wipes in one
single direc tion.
Warning: Do not wipe back and forwards ac ross the lens s urface as this tends to grind dirt into the coating.
3. Use a dry lens cleaning c loth to remove left liquid or stripes. P olish with small circles.
4. If there ar e still fingerprints on the surface, wipe them off with lens cleaner together with a clean lens cleaning cloth. Polish again
with a dry one.
If smears occu r when cleaning len ses, rep lace t he cloth. Smears are the firstindicationofadirtycloth.
14.7 Cleaning the exterior of the projector
How to clean the exterior of the projector ?
1. S witch off the projector and unplug the projector from the mains power n et.
2. Clean the housing of the projector with a damp cloth. S tubborn stains may be removed with a cloth lightly dampened with a mild
detergent solution.
14.8 Check cooling liquid level
What should be done ?
The p rojector is liquid c ooled. It is important that the liquid level is checked at regular intervals. We advise to check every 3 months.
The liquid level m ust be between Min. and Max. Significant drop in liquid level indicates a major leakage and requires immediate
attention.
How to check
1. Remove the left side cover (Light P rocessor side). "Removal of the side cover", page 126.
2. Check the liquid c ooling level in the res ervoir.
5. Pressurized air cans are not efficient if there is too much dust on the surface, the pressure is too low
144 R5906753 DPXK BLP SERIES 20/11/2017
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