Canon Canonet 1 Service Manual page 74

Fig. 2
Note: Fig. 1 Open the hinged back and turn the aperture ring from AUTO to the calibrated scales, watching the diaphragm
from the back of the camera.
Fig. 2 The aperture at AUTO on this condition.
Fig. 3 Turning the aperture ring, you will find one point where the diaphragm begins to be stopped down furthermore
BE SURE TO RETURN THE APERTURE RING TO AUTO AFTER MEASURING!
7. HOW TO INSPECT
7. 1. Keep in mind that the brightness of the projection lamp, the light source of the Inspection Device, changes while
being used. For the surface of the lamp becomes black and the quantity of light which falls on the Opal Glass
is changed. When the filament of the projection lamp is burnt out, you should check the brightness on the Opal
Glass with the new projection lamp you are going to use.
7. 2. Use Canon Meter R which is correctly adjusted as the examining tool.
7.3. How to Examine
7. 3. 1. Choose one of the Canon i.,eier as the standard and check it as soon as the Inspection Device is delivered
to you.
7. 3. 2. Check the chosen Canon Meter R on the conditions according to the attached Data Sheet and record the indi-
cated value.
7. 3. 3. Examine from time to time the Inspection Device by the chosen Canon Meter R and revise the voltage indication
of each Term on the Data Sheet.
7. 3. 4. When you exchange the projection lamp with a new one, check it with the Canon Meter R above mentioned
7 3. 5. Be sure that the voltage indicated on the Data Sheet should be correct especially as for the low voltage! 0 40V
for 100V and 0-100V for- 220V.)
7.4. The projection lamp used in the Inspection Device is that of JIS C 7511 Projection Lamp C 100V 500WS (Metallic
Cap F27-22), which corresponds to ASA PH22.851953 Projection Lamp (Dimensions for T10 Bulb)
8. HOW TO TREAT AND PRESERVE
8. 1. Give neither vibration nor shock to the Inspection Device.
8. 2. After use, let the voltage fall off to 0 by turning the handle left way round, put the switch for light source to
OFF and, after it gets cool, put the switch for the fan to OFF.
8. 3. Avoid as possible lighting continuously for long time.
8.4. Do not let the light from the outside (e.g. the sun, room lamp and so on) influence the Device while using
(Above all, do not open the top cover and never allow direct rays to fall on the Opal Glass )
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