Canon DC-4381 - Manual (Page 31)

EN-31
Others
Problem Cause and solution
Projected images appear wavy
and distorted.
Tint in projected images is
incorrect.
Projected images are
obscured.
Fine streak pattern appears in
projected images.
Only the motion areas in the
images supplied from the
computer aren’t displayed.
Rainbow blurprojected images.
This symptom is normal for a DLP projector and is
not a malfunction. (A very small number of pixels
may stay lit or out, but such sympton is not a
malfunction. Pixels of 99.99% or more are effective.)
This is due to color breaking noise that occurs in a DLP
system and is not a malfunction.
It occurs because of interference with the screen
and isn’t a product malfunction. Change the screen
or readjust the focus of the projector.
Connect the cable’s plug with the external device’s
connector firmly.
Keep the projector away from equipment generating
interfering radio waves.
When the keystone adjustment is carried out, the
image may not be displayed correctly because of
the type of input signal. This isn’t a product
malfunction. In this case, readjust the keystone
so that the amount of keystone correction is as
small as possible.
Check that the cable connected to the external
device isn’t broken.
This is caused by the computer being used. Contact
the manufacturer of your computer.
Match the output resolution of your computer with the
resolution of the projector. For the method to change
the output resolution of the computer, contact the
manufacturer of your computer.
Some images and texts appear obscured during
the keystone adjustment. In such cases, use the
p r o j e c t o r w i t h o u t a p p l y i n g t h e k e y s t o n e
adjustment.
White dots are seen on projected
images.Black dots are seen
onprojected images.