Maintenance
If the air filter becomes broken or too dirty to clean
Replace with an optional air filter. 
"Appendix: Optional Accessories" p.40
•The message "Replace the lamp." appears on the screen when projection starts.
A message will be displayed.
•The projected images get darker or start to deteriorate.
•In order to maintain the brightness and quality of the projected images, a lamp
replacement warning message will be displayed after approximately 1600 hours depending on the conditions that the lamp has been used under.
If you continue to use the lamp after this period, the possibility of the lamp breaking becomes greater. When the lamp replacement message appears, replace the lamp with a new one as soon as possible, even if it is still working.
•The actual life of each individual lamp will vary depending on the characteristics of the lamp and on the way it has been used. The lamp may start to become dark or stop turning on even before the lamp replacement message appears. You should always have a spare lamp ready in case it is needed.
•Contact your dealer for a spare lamp.
Appendix37