Canon Cr-2 User Manual

5 Photography Auxiliary Functions
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2 Take the image. 
Press the small pupil photography button again to finish the small pupil photography. 
•	Do not use the small pupil photography function if the patient's pupil is large enough. The image 
will be overexposed. 
•	 The image may contain flare around the edges of the image outside the photography range. 
Diopter Compensation
If because of the patient's diopter the image cannot be brought into focus by turning the focus ring, 
use the diopter...

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5 Photography Auxiliary Functions
Anterior Eye Photography
This function makes it possible to photograph the anterior eye. It is also possible to use the x2 
photography function at the same time. 
Do not allow external light that contains infrared to enter the position being photographed.  
1 Switch the diopter compensation knob to the anterior eye photography position. 
The anterior eye photography mark appears on the observation monitor. 
Anterior eye 
photographyPhotography 
ready lamp
Anterior...

5 Photography Auxiliary Functions
33
1 Remove the digital camera cover. 
2 Connect the video cable to the digital camera. 
1. Securely insert the supplied video cable into the VIDEO OUT terminal on the digital camera. 
2.  Fit the ferrite core of the video cable into the space in the cover, and place the video cable in the 
notch. 
Ferrite core  Notch 
3 Attach the digital camera cover. 
1. 
Hook the digital camera cover hook onto the strap mount of the digital camera. 
2.  While taking care to avoid...

34
This section describes the CR-2's daily inspections, cleaning, disinfection, as well as refilling the chin 
rest paper, and removing and installing the digital camera. 
 CAUTION•	Before using the CR-2, for safety reasons, be sure to perform the daily inspection.
•	 Have a regular inspection performed for the CR-2 at least once a year by the representative that 
is designated by Canon.
Maintenance and Inspection 
Do the following inspections before using the CR-2 to insure that it is used safely...

6 Maintenance
35
Cleaning the Objective Lens 
•	Do not wipe or rub the objective lens if there is dirt or dust on it. Doing so could scratch the 
surface of the lens. 
•	 Do not wipe the objective lens with disinfectant ethanol, eyeglass cleaner, or silicone-coated 
paper. Doing so could corrode the surface of the lens or leave streaks. 
For information about lens cleaning paper, lens cleaner, and blowers, contact the Canon 
representative or distributor from whom you purchased the CR-2. 
If the...

36
6 Maintenance
Cleaning the Image Sensor 
The digital camera has a self-cleaning sensor unit. Dirt and dust on the front surface of the imaging 
sensor are automatically removed when the power is turned on or off. This function makes it possible 
to remove the majority of dirt and dust that may interfere with images. It is not necessary to be aware 
of this function during normal usage. 
To use the self-cleaning sensor unit for cleaning, follow the procedure below. 
1 Make sure that the power switch...

6 Maintenance
37
Disinfecting the Forehead Rest
 CAUTION•	To prevent the risk of infection, wipe the forehead rest with ethanol solution or any other 
disinfectant whenever changing patients.
•	 The forehead rest may be corroded if a disinfectant other than those above is used or if another 
disinfectant is added to ethanol.
For details on how to disinfect, consult a specialist.
Use a sanitized gauze or wipe that includes disinfectant to clean the forehead rest for each patient. 
Refilling Chin Rest...

38
6 Maintenance
Removing the digital camera 
1 Turn off the power to the retinal camera and remove the plug from the AC outlet. 
2 Loosen the cover screw and remove the digital camera 
cover. 
3 Remove the cables from the digital terminal and the 
remote control terminal. 
4 Remove the DC coupler. 
1. Open the battery compartment cover on the digital 
camera, and then slide the battery lock lever to remove the 
DC coupler. 
2.  Close the battery compartment cover. 
5 While holding down the lens release...

6 Maintenance
39
Installing the digital camera 
1 Make sure the following check items. 
•	The power to the retinal camera is off. 
•	 The power plug of the retinal camera is not plugged into an electric outlet. 
2 Attach the digital camera to the retinal camera. 
1.  Align the positions of the mounting alignment marks on the retinal camera and the digital camera. 
2.  Fit the digital camera's lens mount to the retinal camera's mount. 
3.  Turn the digital camera clockwise until it clicks....

40
If any of the symptoms listed here occurs or if a warning appears in the Rics NM 2 while using the 
CR-2, try the relevant remedy described below. 
If these remedies do not eliminate the symptoms or the warning, turn off the power and contact 
the Canon representative or distributor from whom you purchased the CR-2. Be ready to provide a 
detailed description of the symptoms and message. 
Symptom Cause and remedy 
The power lamp does not light 
when the power is turned on.  The power cord has been...