Mitsubishi Electronics HC7900DW user manual Others Problem Solution

Troubleshooting (continued)

Images are not displayed correctly. (continued)

Problem	Solution
Fine streaks are seen	• This is due to interference with the screen surface and is not a malfunction. Replace
on projected images.	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.)
Projected images	• Connect the plugs of the cables to external devices securely.
become wavy.	• Keep the projector away from devices that emit interfering radio waves.
Hue is not appropriate.	• Check that the cables connected to the external devices are not broken.
Tint in projected	• If the setting of COMPUTER INPUT in the SIGNAL menu is inconsistent with the RGB/
images is incorrect.	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.
Different color tint.	• 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.
Color unevenness	• Since the projector utilizes a high-definition DLP™ chip, color variations (at the center
appears in images.	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.
Only the motion areas	• This is caused by the computer being used. Contact the manufacturer of your
in the images supplied	computer.
from the computer
aren’t displayed.
Projected images are	• Match the output resolution of your computer with the resolution of the projector.
obscured.	For the method to change the output resolution of the computer, contact the
	manufacturer of your computer. (See page 53.)
Image remains	• When image from VCR is projected, it may remain freezing during speed search. This
freezing.	is not a malfunction.
Noise appears around	• In some images such as DVD, noise may appear around the recorded image. In this
the image.	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.)
Projected images are	• After the POWER button or ON button on the remote has been pressed, or the Lamp
flickering.	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.
Others
Problem	Solution
No sound comes	• The projector is not equipped with the speakers. The AV amplifier reads the
from the speakers	information that projector is not equipped with the speakers and then passes this
connected to the AV	information along to the DVD player. Because of this, either the DVD player may be
amplifier. (No sound	temporarily stopping audio output, or the AV amplifier	may be temporarily stopping
comes from the	audio output from the DVD player.
home theater system	 Change the setting on the AV amplifier or the DVD	player.
speakers.)
The exhaust vents	• This air comes out after cooling the inside of the projector. You may feel hot, but this
emit warm air.	is not a malfunction.

EN-48