Optoma DC450, User Manual, Page: 25 / 104

23
When using the document camera :
Problem Cause Solution
The image is fuzzy.
Probably the distance of
object is too close to the
lens.
Press AF button to auto
focus or adjust by pressing
Manual Focus.
Select Macro mode if the
distance is less 25cm.
The image is reverse.
The document is not put in
the recommend working
area.
Press [ ] button to adjust
the direction.
The image dose not move.
Camera image is set to
Freeze [ ].
Press the [ ] button on
the control panel again to
unpause.
Remote control can not
work.
No power.
Replace the AAA batteries in
the remote control.
Object is blocking the
remote control signal
receiver of the document
camera.
Remove obstruction in front
of the product.
The distance of usage is
too far.
Stand closer to the product
to use the remote control.
The display device displays
“MEMORY ERROR” or
“CARD ERROR” message.
Or memory card cannot
be read.
The format of the memory
card is not compatible with
the product.
Use the "Format" function
of the document camera to
format the card.
The memory card is
corrupted.
Replace the memory card
with a new one.