Mitsubishi Electric DLP HC7900DW User Manual page 48

Troubleshooting (continued)
Images are not displayed correctly. (continued)
Problem
Fine streaks are seen
on projected images.
Projected images
become wavy.
Hue is not appropriate.
Tint in projected
images is incorrect.
Different color tint.
Color unevenness
appears in images.
Only the motion areas
in the images supplied
from the computer
aren't displayed.
Projected images are
obscured.
Image remains
freezing.
Noise appears around
the image.
Projected images are
flickering.
Others
Problem
No sound comes
from the speakers
connected to the AV
amplifier. (No sound
comes from the
home theater system
speakers.)
The exhaust vents
emit warm air.
Solution
• This is due to interference with the screen surface and is not a malfunction. Replace
the screen or displace the focus a little.
• Vertical or horizontal streak noise may appear on the projected image, depending on
the type of the DVD player or game console you use. In such a case, you can reduce
such streak noise by enabling the LPF. (See page 40.)
• Connect the plugs of the cables to external devices securely.
• Keep the projector away from devices that emit interfering radio waves.
• Check that the cables connected to the external devices are not broken.
• If the setting of COMPUTER INPUT in the SIGNAL menu is inconsistent with the RGB/
YCbCr output setting of the external device even when the input source is other than
COMPUTER (for example, when the input source is HDMI), the entire image appears
reddish or greenish.
 Check that COMPUTER INPUT in the SIGNAL menu is correctly set. (See page
34.)
• Check that the cable connected to the external device isn't broken.
• When comparing images projected by two projectors, tints in the displayed images
may be different because of variation between their optical components. This is not a
malfunction.
• When comparing the image projected by this projector with those displayed on the
television or PC monitor, tints in the displayed images may be different because of
difference in the range of color reproducibility. This is not a malfunction.
• Since the projector utilizes a high-definition DLP™ chip, color variations (at the center
of the screen and along the rims of the active area) that are caused by diffraction of
light may occur. This is not a malfunction.
• 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. (See page 53.)
• When image from VCR is projected, it may remain freezing during speed search. This
is not a malfunction.
• In some images such as DVD, noise may appear around the recorded image. In this
case, decrease the setting value of OVER SCAN of the SIGNAL menu or adjust the
setting value of SHUTTER of the SIGNAL-USER menu. (See page 34.)
• After the POWER button or ON button on the remote has been pressed, or the Lamp
mode setting has changed, images may be flickering until the lamp lights stably. This
is an expected behavior.
• When selecting the input signal and Auto Position, the projected image may be
flickering temporarily. This is not a product malfunction.
Solution
• The projector is not equipped with the speakers. The AV amplifier reads the
information that projector is not equipped with the speakers and then passes this
information along to the DVD player. Because of this, either the DVD player may be
temporarily stopping audio output, or the AV amplifier may be temporarily stopping
audio output from the DVD player.
 Change the setting on the AV amplifier or the DVD player.
• This air comes out after cooling the inside of the projector. You may feel hot, but this
is not a malfunction.
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