Jolimark DS-250, Руководство пользователя

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User’s Manual
26
Appendix D. Troubleshooting
Please read the following section when you encounter problems in using the projector.
If the problem persists, contact your local dealer or service center.
Does not Project
• Have you pressed the main power switch to “I” position?
• Have you removed the lens cap?
• Have Remote control batteries run out.
• Did you replace the lamp just now?
Ensure that the lamp wire has been connected while replacing the lamp.
• Did the projector lose power suddenly and you want to restart it within 10
minutes?
Just wait 1 minute. Refer to Page 25.
No Picture
No picture, but when you press the [MENU] button, the OSD
menu can be call out.
• Is the projected picture completely black?
Some input pictures, such as screen saver, may be completely black.
• Do the input signal resolution and the refresh rate correspond to the mode?
Ensure that your projector supports the input signal. Please refer to
“Compatible Input Signal List” in Page 29.
• Is the image signal format setting correct?
• Are the cables connected correctly?
• Is the correct input port selected?
Change the image by pressing the [SOURCE] button on the control panel.
• Is the power of the computer or video source turned on?
• Is the signal being output to the projector? (Only for Notebook)
If the signal is only being output to the notebook’s LCD monitor, you need
to change the output to an external destination as well. For some
notebook model, when the signal is output externally, they no longer
appear on the LCD monitor. See details in the notebook’s documentation,
under a title such as “External Output” or “Connecting an external
monitor”.
Picture is out of Focus and Fuzzy
• Is the focus adjusted correctly?
• Does the Elevator Foot extend too long to affect the focus?
Large projection angle causes the focus departs from the center too much
to adjust.
• Is the projector at the correct distance?
The recommended range is 1
～
5m, position the projector in this range.
• Is there blemish on the lens?
• Has condensation formed on the lens?
If the projector is suddenly taken from a cold environment to a warm
environment or if sudden ambient temperature change occurs,
condensation may form on the surface of the lens, and this may cause the
images to appear fuzzy. Place the projector in the room about one hour
before it is used. If condensation forms on the lens, turn the projector off
and wait for the condensation to disappear.
• Is the resolution of the input signal native?
If the projector is connecting to computer or RGB signal source, please
change the resolution of the input signal to 800*600 85Hz (DS-250) and
1024*768 85Hz (DX-280/300/380/400), you can get the clearest picture.
• Is the Keystone correction activated?
Keystone correction will distort the image. Do not use the keystone
function that is not necessary.