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Service Instructions VISUCAM
lite
Issue: 22.09.2003
SM-30-4044-A1-en
Replaces issue:
Page
17
of 41
Checking the barrier filter drive
The function of the stepper motor and opto-coupler can be checked using the service software.
•
Start the service software (see "
Opening the
Test Tools program"
).
•
Select the "step motors" tab.
•
Select the "barrier" tab.
⇒
⇒
⇒
⇒
Position selection 0-3 permits you to select
the different filters
⇒
⇒
⇒
⇒
If you press the "set home position" button,
the 0 position is set.
•
Manually turn the filter wheel until the slit is
located in the opto-coupler.
⇒
⇒
⇒
⇒
The
mark indicates the transmitted light
function of the opto-coupler.
Finder camera
Replacing the finder camera
•
Open the camera head (see: Opening
and closing the camera head).
•
Unplug the connections of the finder
camera from the control PCB.
•
Remove the cable mounts.
•
Remove the angled bracket including the
finder camera.
•
Mount the new finder camera, connect the
cables and secure them in position.
Positioning the finder camera
•
Mount one of the two covers.
•
Move the bracket including the finder
camera in such a way that it rests slightly
against the inner side of the housing.
•
Tighten fastening screws.
Adjusting the focus of the finder camera
•
Switch on VISUCAM
lite
and start the program (also see the
user manual
).
•
Create a test patient file and start the image capture mode.
⇒
⇒
⇒
⇒
The finder camera's field of view is visible on the bottom left of the
screen.
•
Attach a piece of paper displaying centering circles to the headrest.
•
Adjust brightness as required for observation. Center and focus the
illuminated ring on the centering circles. You can see then structures
of fiber optic.
⇒
⇒
⇒
⇒
The rings must be displayed sharply defined. If the rings are
blurred, turn the focusing ring on the finder camera until you have
obtained a sharply defined image.
This completes the mechanical alignment.
•
Close the camera head (see:
Opening
and closing the camera head
).
Focus ring
White LED
IR LED
Summary of Contents for VISUCAM lite
Page 38: ......