Repair manual

2-59
THEORY OF OPERATION
Table 2-12. Monitor P.C. Board Controls (Con’t)
Name Number Function
V COS4 R26 This control vertically adjust for even illumation
of the CRT video display. The radial luminance of
the CRT video display is increased preventing light
fall-off in the corners. It provides an even
exposure in the finished print/slide - no dark
corners.
CRT The centering rings are located on the CRT Yoke.
Centering They are only used during final assembly of the
Rings Digital Palette to properly center (horizontally
and vertically) the CRT video display.
The centering rings are secured with hot melt glue
at final assembly.
If the horizontal and vertical centering
potentiometers (R7 and R27) can not properly
center the CRT video display, use the centering
rings.
Refer to the Calibration and Adjustment Section in
this Service Manual for a detailed description on
how to properly center the CRT video display.
CRT Yoke The CRT Yoke is only used during final assembly
of the Digital Palette to square the CRT video
display.
The yoke is secured to the CRT tube with a bracket
at final assembly.
If the video display is tilted, use the yoke to
properly square the video display to the face of
the CRT. Refer to the Calibration and Adjustment
Section in this Service Manual for a detailed
description on how to square the video display to
the face of the CRT.