Apple 560, 575, 577, 550, 500, 578 manual Pattern

Adjustments		Video - 19
	8	Use Display Service
		Utility to display the
		All-White Screen test
All-White Screen		pattern.
	9	Using the light meter,
		adjust the sub-contrast
		control (SC) until the
		luminance measures 33
		feet lamberts (± 3 foot
		lamberts), which on the
		light meter is
		• Model R77: 25 on the
		bottom scale
		• Model L-248: middle
		of the 10 scale
		• Model 246: 25 on the
		red scale