Viewsonic PJ400 User Manual

ViewSonic PJ400 

43 

WARNING    ►Do not replace the air filter during use or immediately after use. 

Handling while the projector is in a high temperature could cause a burn and/or 
malfunction to the projector. Before operating, make sure that the power switch is off, 
that the power cord is not plugged in, and that the projector is cool adequately. 

►Use only the air filter of the specified type. Do not use the projector with the air filter 
and filter cover removed. 
►Avoid wetting the projector or inserting liquids in the projector. It could result in a 
fire, an electric shock, and and/or malfunction to the projector. 

CAUTION    ►Please replace the air filter when it is damaged or too soiled, and also 

when you replace the lamp.   

When the indicators or a message prompts you to clean the air filter, clean the air filter as 
soon as possible. If the air filter becomes clogged by dust or the like, internal 
temperatures rise and the power may be automatically turned off for malfunction 
prevention. 
1. Disconnect all the connectors and adapters that were connected to the projector’s ports. 

Then slowly turn the projector so that the lens-side is facing up. Please be careful for a 
projector not to fall. While the projector is placed lens-side up, hold the projector. 

2. Remove the filter cover and the air filter. Hold the knobs while pulling out it. 

Usual filter cover 

   

 

Filter cover’s knobs

 

 

Air filter’s knob

 

 

Filter cover for bottom-up use 

 

 

   

Filter cover’s knobs

 

3. Apply a vacuum cleaner to the vent of the projector for the air filter. And then slowly turn 

the projector bottom up.