Canon EOS D60, Service Manual

Page: 108 / 211

Part 3: Repair Information
3-30
4. SIMPLIFIED MEASUREMENT METHOD OF EXPOSURE AND SHUTTER
The histogram display function provides a simple but effective method of
checking exposure and the shutter operation.
Removing the DIGITAL block takes time and using the histogram display
function enables judgment of exposure and shutter without removing it.
<Preparation>
1) Press the <AF/WB> button in the left of the display panel.
Turn ON the back cover dial and let the display show the white balance
selection mode.
2) Turn the back cover dial to select the desired option name by highlighting it.
3) Set the white balance to the incandescent lamp marking.
<Confirmation of Shutter Speed>
1) Set the shutter speed of the camera to 1/4000, aperture to f/2.8, luminance
LV15 and K value to 12.5. Let the camera close the shutter.
2) Check to see that the normal histogram as shown in the figure below appears.
If the center of the histogram is either in the right or in the left, the histogram
indicates that the amount of incident light on the CMOS sensor is either
excessive or short. It is suspected that the shutter speed of 1/4000 is actually
not realized.
When the histogram has a symmetrical
shape, it indicates that the correct shutter
speed is obtained. Refer to the figure in the
right.
If luminance of EV15 is not correct, center of a picture is not
positioned in the center as shown in the figure below. Luminance at
EV15 and K value 12.5 is 4096 cd/m
2
.
Normal
The shutter
closes early
The shutter
closes late
CAUTION