Canon CF-1 Operating Manual page 46

000_L-IE-5152E_CF-1.book Page 46 Monday, July 29, 2013 10:30 AM
7. Daily Inspection and Maintenance
The split lines are not
visible.
The split lines do not
align.
Sharp images cannot be
taken.
Black spots appear on
photographed images in
the same area.
Problem
The split bar is not displayed.
The pupil is not dilated enough.
The positioning is not correct.
Eyebrows or eyelashes are
blocking the pupil.
The patient's vitreous body is
unclear.
The diopter compensation lever is
set to the - side or + side.
The Internal Eye Fixation Target
(sold separately) is used.
The split lines display lamp is
burned out.
The diopter of the patient's eye is
outside the range of -10 to +15 D.
The pupil is not dilated enough.
The positioning is not correct.
The image is unfocused.
Eyebrows or eyelashes are
blocking the pupil.
The patient's eye is opaque.
The patient blinked when the
image was taken.
The flash intensity, diopter
compensation lever, and
viewfinder diopter compensation
ring have not been adjusted.
The objective lens is dirty.
Dust or another substance is
adhering to the surface of the
objective lens.
Dust or another substance is
adhering to the surface of the
CMOS sensor of the EOS digital
camera.
Cause
Press the focus indicator switch to
display the split bar.
Dilate the patient's pupil. If the pupil is
still too small, press the small pupil
photography switch to activate the small
pupil function.
Perform positioning.
Instruct the patient to open his or her eye
wider.
Focusing cannot be performed with the
split lines.
Set to the no compensation position.
The split lines cannot be displayed.
In this case, turn the focus knob to adjust
to the position where the cross-hair lines
and fundus image are clearly visible at
the same time inside the viewfinder.
Contact your sales representative or local
Canon dealer.
Turn the focus knob to focus so that the
cross-hair lines in the field of view and
the fundus image can be seen clearly at
the same time.
Dilate the patient's pupil. If the pupil is
still too small, press the small pupil
photography switch to activate the small
pupil function.
Perform positioning.
Focus the image.
Instruct the patient to open his or her eye
wider.
A sharp image cannot be taken.
Take another image.
Adjust the settings.
Clean the lens (see page 48).
Clean the lens (see page 48).
Clean the CMOS sensor by referring to
the operation manual for the EOS digital
camera.
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Remedy