Repair manual

2-58
THEORY OF OPERATION
Table 2-12. Monitor P.C. Board Controls
Name Number Function
COARSE R46 This control adjust the coarse luminance
LUMA (brightness) of the CRT video display to a level
that is easily visible to the eye. It adjust the
electron flow through grid 1 of the CRT for a
coarse brightness of approximately 6 foot-lamberts.
FINE R47 This control adjust the fine luminance (brightness)
LUMA of the CRT video display. It adjust the electron
flow through grid 1 of the CRT to bring the
brightness into specification.
Focus R36 This control adjusts the sharpness of the CRT
video display. It adjusts the electron flow through
grid 7 of the CRT.
H LIN L11 This control adjusts the horizontal linearity of
the CRT video display.
H CENTER R7 This control horizontally centers the CRT video
display.
H WIDTH R14 This control adjusts the horizontal width of the
CRT video display.
H COS4 R38 This control horizontally 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
picture/slide - no dark corners.
V CENTER R27 This control vertically centers the CRT video
display.
HEIGHT R48 This control adjusts the vertical size (height) of
the CRT video display.