Sharp QA1150 Operation Manual page 37

(3) The contrast of the display is
not uniform.
(4) The projected image is
difficult to read, out of focus,
or reversed.
(5) The remote control unit does
not operate
Make sure that the overhead projector is properly
adjusted.
Make sure that the overhead projector 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 overhead projector is a good
quality transmissive type (and not a compact
reflective mirror type).
Make sure that the overhead projector is properly
focused. Note that the correct OHP focus for the
QA-1150 differs slightly from that which is correct
for a film-type transparency.
Verify that the computer's RGB signal output is
compatible with the QA-1150's specifications. (See
specifications on pages 39-49.)
If the QA-1150 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.
Are the batteries in the remote control unit low?
Check that the batteries in the remote control unit are
inserted with the correct polarity.
Is the remote control unit pointing in the correct
direction so that the infrared signal can bounce off the
screen and reach the receptor on the QA-1150 unit?
Check that the remote control transmitter is not too
far from or too close to the QA-1150 main unit.
Is there sunlight or bright illumination such as
fluorescent light shining on the infrared receiver on
the QA-1150 main unit?
Check that no other remote control equipment is
~ being used at the same time.
Qs