11. Maintenance
11. MAINTENANCE
About this chapter
This chapter c ontains general maintenance procedures.
Overview
• Cleaning the lens
• Cleaning the ex terior of the projector
11.1 Cleaning the lens
To m inimize the possibility of damage to optical co atings, or scratches to lens su rfaces follow the clean ing
procedure as d escribed here precisely.
Necessary tools
• Compressed air.
• Clean Toraysee® cloth or any micro fiber lens cleaning cloth.
• Clean cotton cloth.
Necessary parts
Lens cleaner (e.g. Carl Zeiss lens cleaner or Purasol® or any water-based lens cleaner)
How to clean the lens?
1. Blow off dus t w ith c lean c ompr essed air (or pressurized air cans
1
).
2. Clean with lens cleaner together with a clean lens cleaning cloth to remove the dus t and contam ination. Use big wipes in one
single direction.
Warning: Do not wipe back and forwards ac ross the lens surface as this tends to grind dirt into the coating.
3. Use a dry lens cleaning cloth to remove left liquid or stripes. P olish with s mall circles.
4. If there are still fingerpr ints on the surface, wipe them off with lens cleaner together with a clean lens cleaning cloth. Po lish again
with a dry one.
If smears o ccur when cleaning len ses, rep lace the cloth. Sm ears are the firstindicationofadirtycloth.
11.2 Cleaning the exterior of the projector
How to clean the exterior of the projector ?
1. Switch off the projector and unplug the projector from the m ains power net.
2. Clean the ho using of the projector with a damp cloth. S tu bborn stains may be remov ed with a cloth lightly dam pened with a mild
detergent solution.
1. Pressurized air cans are not efficient if there is too much dust on the surface, the pressure is too low
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