Nikon COOLPIX S550 Repair Manual page 65

6. Pattern box
Before using the pattern box, turn its power on to carry out "Aging" approx. 30 minutes: the color temperature must be
adjusted to 3100 ± 20K by the color meter, and the luminance must be adjusted to 900 ± 20cd/m
meter. When the pattern box is used and for a while even after the power turns off, the lamp and its surroundings are
subject to high temperatures, so handle them with care.
・ Procedure for correcting Pattern Box
Note: Be sure to perform "aging".
1) Measure the measuring point (center of diffusion plate) with the Color Meter (J63081).
2) Adjust the pattern box so that the color temperature must be 3100 ± 20K by using "VR for adjustment of the color
temperature".
3) Measure the center of the diffusion plate with the Luminance Meter BM-3000 (J63068 BM3000).
4) Adjust the pattern box so that the luminance must be 900 ± 20cd/m
5) Repeat from 1) to 4) so that the color temperature must be 3100 ± 20k and luminance must be 900 ± 20cd/m
Power switch
VR for adjustment of Knob for luminance
the color temperature adjustment
- A38 ･ S550 -
VMA21024-R.3750.A
2
by using "Knob for luminance adjustment".
2
Aperture unit
Diffusion plate
Area to be measured
INC
by the luminance
2