Canon Cr-2 User Manual

							5 Photography Auxiliary Functions
31
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 compensation knob to change the position. Insert the diopter compensation lens into 
the CR-2 and take the photograph. 
0
Negative 
Positive  Diopter compensation mark 
The CR-2 can provide appropriate images if the diopter of the patient’s eye fall within each range 
below. 
•	 0 position:   –10 to +15 D 
•	 – position:   –31 to –7 D 
•	 + position:   +11 to +33 D 
Note that when the diopter compensation knob is set to the – or + position, the focus indicator does 
not appear. Turn the focus ring to focus the retinal image in a position that brings the image clear on 
the observation monitor. 
When operating the diopter compensation knob, set it precisely to the 0, –, or + position. If the 
knob is not aligned with the position noted above, the retinal image is not captured correctly.   
						

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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 eye 
photography mark 
2 Move the operation lever to align the area to be photographed in the center of the 
observation monitor. 
3 Tilt the operation lever to the front or back to focus on the area to be photographed. 
•	
Focus the image so that the area to be photographed can be seen as clearly as possible. 
•	 Make sure that the photography ready lamp lights green. 
4 Press the shutter release button. 
The image of the retina appears on the Rics NM 2 screen. 
To take images of another position, repeat steps from step 2. 
External Monitor
The image on the observation monitor can be viewed on an external monitor. 
Contact the Canon representative or distributor from whom you purchased the CR-2 about which 
external monitors can be used. 
•	Before connecting or disconnecting video cables, be sure to turn off the retinal camera and all 
other devices. 
•	 Use only the video cable provided with the instrument. Images might not be displayed if a 
different video cable is used. 
•	 Use an external monitor that conforms to IEC60601-1 or IEC60950-1. If you use a monitor that 
conforms to IEC60950-1, be sure to also use the isolation transformer that is designated by 
Canon. For details, contact the Canon representative or distributor from whom you purchased 
the CR-2.   
						

							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 pinching the video cable, insert the cover screw to secure the digital 
camera cover. 
Cover screw 
4 Connect the video cable to the external monitor. 
Connect the video cable to the video input terminal (yellow) on the external monitor. Turn on the 
external monitor, and select the input using the monitor's input switch. 
Audio 
Video input terminal 
5 Turn on the power to the retinal camera and the digital camera. 
The image is displayed on the external observation monitor. No image is displayed on the observation 
monitor of the retinal camera.   
						

							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 and correctly. 
If a problem is found during the inspection and you are unable to correct the problem, please contact 
the Canon representative or distributor from whom you purchased the CR-2. 
Checks before turning on the power 
Check the following items before turning on the power. 
Cables 
1)  The power cord and connection cable are not damaged and their insulation is not torn. 
2)  The power cord is fully and securely inserted into the AC connector on the main unit and the AC 
outlet. 
Main unit 
1) The digital camera cover and parts are not damaged or loose. 
2)  The stage moves smoothly when the operation lever is tilted back and forth and right to left. 
3)  The digital camera is securely installed. 
4)  The stage lock operates properly. 
5)  There are no scratches or dirt on the objective lens. Clean the objective lens if it is dirty (see page 35). 
Checks after turning on the power 
Turn on the CR-2 and start the Rics NM 2. Check the following items after starting an examination. 
Main unit 
1) The power lamp lights. 
2)  The observation light brightness changes as the observation light brightness button is pressed. 
3)  A flash is emitted. 
4)  The main unit moves up and down smoothly as the main unit vertical movement ring is turned. 
5)  The chin rest moves up and down smoothly as the CHIN REST button is pressed. 
Photographed image
1) Foreign object that affects the reading of the images or diagnosis does not appear in the 
photographed image. Place a piece of white paper in front of the objective lens and photograph 
an image under the following conditions. 
	 •	Flash	intensity:		 	 	 Standard	
	 •	Diopter	compensation	knob:		 0
	 •	Focus	ring:		 	 	 Turned	clockwise	more	than	1	rotation.	
6
 Maintenance  
						

							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 objective lens is dirty, clean it according to the procedure below. 
1 Check for any dirt. 
Illuminate the objective lens with a penlight to check for dirt.
2 Blow away any dust or dirt. 
Use a blower to blow away any dust or dirt on the lens. Do not 
use a brush to dust off.
Do not allow the blower to touch the objective lens. 
3 Wipe the objective lens. 
1.  Slightly dampen a lens cleaning paper with lens cleaner 
and lightly wipe the objective lens. 
2.  Starting from the center of the lens, wipe the lens in spirals 
toward the circumference. 
3.  Change the lens cleaning paper and wipe the objective 
lens until the dirt is gone and there are no streaks. 
Use lens cleaning paper and lens cleaner designated by Canon.   
						

							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 for the retinal camera is turned off. 
2 Switch the digital camera's power switch from on to off, or from  to off. 
The self-cleaning sensor unit starts and the imaging sensor is cleaned. 
3 Check that the dirt and dust have been removed. 
4 Switch the digital camera's power switch to on, photograph an image and check the 
image. 
If the above procedure does not remove the foreign object, the cause may not be dirt or dust. 
Contact the Canon representative or distributor from whom you purchased the CR-2. 
Cleaning the Outside of the CR-2 
 WARNING•	Before cleaning the CR-2, be sure to turn off the power of all the devices, and unplug the power 
cord from the AC outlet.
•	 Do not use alcohol, benzine, thinner or any other flammable cleaning solvent.
Otherwise, fire or electric shock may result.
Do not clean the outside of the CR-2 with lens cleaner. It may corrode the material of the outside 
of the CR-2. 
If the outside of the CR-2 is dirty, wipe it twice with a soft cloth. First use a cloth that has been soaked 
in diluted neutral cleanser and well wrung out. Then use a cloth that has been soaked in water and 
well wrung out.   
						

							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 Paper
 CAUTIONIf the chin rest paper is not being used, be sure to disinfect the chin rest whenever the patient is 
changed. For details on how to disinfect, see the Disinfecting Forehead Rest section.
1 Pull out the right and left chin rest holding pins. 
2 Insert the holding pins into the holes on the right and left of the chin rest paper. 
3 Attach the chin rest paper to the chin rest with the pins pressing into the holes on the 
chin rest. 
Chin rest paper is a consumable product (sold separately). To purchase chin rest paper, contact 
the Canon representative or distributor from whom you purchased the CR-2. 
Attaching and Removing the Digital Camera 
The CR-2 is equipped with a specialized digital camera. It is not necessary to attach or remove the 
digital camera during normal usage. 
To replace the digital camera, follow the procedure below to remove and attach the digital camera. 
Note the following points if it is necessary to remove and attach the digital camera. 
•	 Work quickly in a location where there is little dust. 
•	 When removing the digital camera for storage, be sure to attach the supplied camera mount cap 
to the retinal camera and the body cap to the digital camera. 
•	 Wipe off any dust from the camera mount cap and the body cap before attaching them. 
•	 Do not touch the lens in the main unit or the mirror in the digital camera. It is not possible to take 
good images if dirt, fingerprints, or dust on these parts.   
						

							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 button 
on the digital camera, turn the digital camera 
counterclockwise to remove it. 
6 Attach the caps to the retinal camera and the digital camera mount.   
						

							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. 
Mounting alignment mark 
3 Attach the DC coupler to the digital camera. 
1. Open the battery compartment cover of the digital camera, 
and attach the DC coupler. 
2.  Pass the cord for the DC coupler through the DC coupler 
cord hole and then close the battery compartment cover. 
4 Open the terminal cover of the digital camera and 
attach the cables to the digital terminal and the remote 
control terminal. 
5 Attach the digital camera cover to the digital camera. 
1. Hook the digital camera cover hook onto the strap mount 
of the digital camera. 
2.  Insert the cover screw to secure the digital camera cover.   
						

							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 disconnected. Turn off the power to 
the retinal camera and reconnect the power. 
The power cord has been cut. Contact the Canon 
representative or distributor from whom you purchased the CR-
2. 
A buzzer sounds (pi-pi-pi) and the 
operation panel lamps blink when 
the power is turned on.  A system error has occurred. Contact the Canon representative 
or distributor from whom you purchased the CR-2. 
The observation monitor is dim 
and hard to see.  Adjust the brightness of the observation monitor. See the Rics 
NM 2 manual. 
The observation monitor does not 
turn on.  Turn on the digital camera. 
An error appears (Err xx) on the 
observation monitor.  A malfunction has been detected in the digital camera. Turn off 
the power to the retinal camera and then turn it on again. 
The working distance dots are 
hard to see.  The observation light is too bright. Reduce the observation light 
brightness. 
The split lines are hard to see. 
The working distance dots are not 
visible.  The retinal camera and the eye are not aligned. Align them 
correctly. 
Flare is visible. 
The split lines are not visible.  The patient's pupil is not dilated enough. Dilate the patient’s 
pupil. If the pupil is still too small, enable the small pupil 
photography function. 
Eyebrows or eyelashes are blocking the pupil. Instruct the 
patient to open their eye wider. 
The patient's eye is cloudy. Focusing cannot be done with the 
split lines. 
The diopter compensation knob is set to either negative or 
positive. Set it to the 0 position. 
The split line lamps are not lit. 
The split lines do not align.  The diopter patient's eye is outside the range of –10 to +15 D. 
Use the diopter compensation function, turn the focus ring, and 
focus on the position where the images of the retina look clear 
at the same time. 
7
 Troubleshooting