7. Maintenance
7.3
Cleaning the lens
To minimize the possibility of damage to optical coatings, or scratches to lens surfaces follow the cleaning
procedure as described here precisely.
Necessary tools
•
Compressed air.
•
Clean Toraysee® cloth or any micro
fi
ber 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 dust with clean compressed air (or pressurized air cans
1
) .
2. Clean with lens cleaner together with a clean lens cleaning cloth to remove the dust and contamination. Use big wipes in one
single direction.
Warning:
Do not wipe back and forwards across 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. Polish with small circles.
4. If there are still
fi
ngerprints on the surface, wipe them off with lens cleaner together with a clean lens cleaning cloth. Polish again
with a dry one.
If smears occur when cleaning lenses, replace the cloth. Smears are the
fi
rst indication of a dirty cloth.
1. Pressurized air cans are not efficient if there is too much dust on the surface, the pressure is too low
72
R5905823 HDQ 4K35 30/11/2015
Summary of Contents for HDQ 4K35
Page 1: ...HDQ 4K35 User and Installation manual R5905823 04 30 11 2015 ...
Page 4: ......
Page 58: ...4 Lenses Lens Holder 54 R5905823 HDQ 4K35 30 11 2015 ...
Page 69: ...6 Starting up 6 STARTING UP R5905823 HDQ 4K35 30 11 2015 65 ...
Page 70: ...6 Starting up 66 R5905823 HDQ 4K35 30 11 2015 ...
Page 84: ...7 Maintenance 80 R5905823 HDQ 4K35 30 11 2015 ...
Page 96: ...8 Removal and installation of the projector covers 92 R5905823 HDQ 4K35 30 11 2015 ...
Page 98: ...A Dimensions and specifications 94 R5905823 HDQ 4K35 30 11 2015 ...
Page 108: ...B Environmental information 104 R5905823 HDQ 4K35 30 11 2015 ...