Troubleshooting - Sharp QA-1200 Operation Manual

6. TROUBLESHOOTING
Before calling for service, please closely review the following troubleshooting information.
Problems:
(1) No image appears on the
projection panel's display
area.
(2) Display is off-centered or
flickering, certain images do
not appear on the display, or
the image appears distorted.
(3) The contrast of the display is
not uniform.
(4) The projected image is
difficult to read, out of
focus, or reversed.
Possible Solution:
@ Make sure that the panel's AC adaptor is properly connected.
@ Make sure that the RGB signal cable is properly connected to both the
computer and the panel.
@ Verify that the panel's power switch is set to the on position.
@ Verify that the computer's RGB signal output is compatible with the
projection panel's specifications. (See specifications on pages 28-32.)
@ Verify that the RGB signal level is appropriate for your software.
@ Check that the unit is not in clear mode.
@ If using a Laptop computer, check the computer's operation manual for
external monitor hook up.
@ Verify that the video source has power.
@ Verify that the video source has tape or disc.
@ Verify that the computer's RGB signal output is compatible with the
projection panel's specifications. :
@ Verify that the RGB signal level is suitable to your software.
@ Press reset.
@ Adjust horizontal and vertical to center image.
@ Adjust CONTRAST and phase.
@ If the projected image flickers when using analog signals, adjust the
contrast.
@ If vertical bars appear, adjust frequency.
@ Make sure that the OHP is properly adjusted.
@ Make sure that the OHP is a good quality transmissive type, and that the
heat from the projector is not causing the temperature of the LCD to reach
45 °C(113°F).
@ Make sure that the air flow vent is not blocked.
@ Make sure the fan is working.
@ Make sure that the OHP is a good quality transmissive type (and not a
compact reflective mirror type).
@ Make sure that the OHP properly focused. Note that the correct OHP
focus for the projection panel differs slightly from that which is correct for
a film-type transparency.
@ Verify that the computer's RGB signal output is compatible with the.
projection panel's specifications. (See specifications on pages 28-32.)
@ If the projection panel is being used in a room with very bright lights,
image quality may be substantially improved by dimming the lights.
@ Check the front- or rear-projection selection.
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