Panasonic PT-RZ21K Operating Instructions Manual page 24

rDo not touch the surface of the projection lens with your bare hands.
If the surface of the projection lens becomes dirty from fingerprints or anything else, this will be magnified and
projected onto the screen.
Attach the supplied lens cover to the optional projection lens when not using the projector.
rDLP chips
f The DLP chips are precision-made. Note that in rare cases, pixels of high precision could be missing or always
lit. Such a phenomenon does not indicate malfunction.
f Directing a high-power laser beam onto the projection lens surface can damage the DLP chips.
rDo not move the projector or subject it to vibration or impact while it is operating.
Doing so may shorten the life of the built-in motor.
rLight source
The light source of the projector uses lasers, and has the following characteristics.
f Depending on the operating environment temperature, the luminance of the light source will decrease.
The higher the temperature becomes, the more the luminance of the light source decreases.
f The luminance of the light source will decrease by duration of usage.
If brightness is noticeably reduced and the light source does not turn on, ask your dealer to clean inside the
projector or replace the light source unit.
rComputer and external device connections
f When connecting a computer or an external device, read this manual carefully regarding the use of power cords
and shielded cables as well.
rViewing 3D images
The projector can display the 3D video signal input in various formats such as "frame packing", "side by side", etc.
You are required to prepare external devices for viewing 3D images (such as 3D eyewear, video signal output
devices) which are suitable for your 3D system. Connections of the projector and external devices vary depends
on the 3D system to be used, see the operating instructions of external devices you use.
Refer to "List of 3D compatible signals" (x page 242) for the types of 3D video signals that can be used with the
projector.
24 - ENGLISH
Chapter 1 Preparation — Precautions for use