Canon CXDI-55C, Service Manual

Page: 94 / 186

2. Installation
78
4) Fine adjustment
4-1) As the step (3)-3) above, make the system “READY” by selecting the exposure mode
“SMPTE” on the exposure screen. [Fig. 4]
[Fig. 4]
4-2) On the X-ray generator press the exposure button. After the exposure, adjust the trim
so that the gray scale may be located in the center of the image. [Fig. 5]
* For correct density measurement of the 32-step chart, the gray scale must be printed
in the center of an image to eliminate the shading feature.
* Data may not from a straight line near the minimum and maximum densities due to
characteristics of the printer. Rotate the image on the QA screen, and reprint or retake
measurements.
[Fig. 5]