Epson EMP-7800 User Manual page 118

Problem Solving Problem Solving
Images are fuzzy or out of focus.
Check
Has the focus been adjusted correctly?
Is the lens cover still attached?
Is the projector at the correct distance?
Is the keystone adjustment value too large?
Has condensation formed on the lens?
Interference or distortion appear in images.
Check
Are the image signal format settings correct? If a video source is connected to the [BNC] ports of the projector, use the "BNC Input" menu
Are the cables connected correctly?
Is an extension cable being used?
Has the correct resolution been selected?
Only when projecting computer images
Have the "Sync. " and "Tracking
been adjusted correctly?
Only when projecting computer images
Turn the focus ring on the projector to adjust the focus.
Remove the lens cover.
The recommended projection distance range is 77–1113 cm. Set the projector up so that it is within
this range. p.16
Decrease the projection angle to reduce the amount of keystone correction.
If the projector is suddenly taken from a cold environment to a warm environment or if sudden
ambient temperature changes occur, condensation may form on the surface of the lens, and this may
cause the images to appear fuzzy. Set the projector up in the room approximately one hour before it
is to be used. If condensation forms on the lens, turn the power off and wait for the condensation to
disappear.
command to select the signal format which matches the connected signal source.
"Setting" - "BNC Input"
If a composite video
menu command to select the signal format.
"Video" - "Video Signal"
Check that all of the cables required for projection are securely connected.
If an extension cable is used, electrical interference may affect the signals. Use the accessory cables
and check if this helps.
Set the computer so that the signals that are output are compatible with this projector.
"List of Supported Monitor Displays"
Computer documentation
" settings Press the [Auto] button on the remote control or the [Auto/Enter] button on the projector's control
panel too carry out automatic adjustment. If the images have not been adjusted correctly after using
automatic adjustment, you can make the adjustments using the "Sync" and "Tracking" menus.
p.52, p.53
Remedy
p.33
Remedy
p.83
or S-Video source is connected to the projector, use the "Video Signal"
p.79
p.142
p.40
p.43
p.18–p.29
117