Nikon D200 Repair Manual page 99

8. Summary
The summary on each adjustment is as follows:
(1) Writing of fixed values
Because the fixed value that is written in Repair Parts is blank, write the fixed value when the DG-PCB is
replaced.
(2) Gr/Gb difference compensation adjustment (G filter)
Camera is faced to the light-emitting box (color viewer) of LV13 equiv. with SP2 (G filter) being put
between them, and the adjustment is made so that the difference between Gr and Gb output of the center
(425×425 pixels) can fall in the standard range.
G-line crawl (3895×2610 pixels) is divided into (29×25) blocks, and the difference between Gr and Gb
output can fall in the standard range.
(3) Sensitivity adjustment
Camera is faced to the color viewer of LV13 equiv. with ND filter (-5 steps) being put between them, and
the adjustment is made by changing the ampgain so that G output can fall in the standard range. The gain
value is adjusted so that the G output average value (Average of Gr/Gb) in the center (425×425 pixels) can
reach the target output level (approx. 1040LSB). The actual adjustment of the gain value is made only
under the condition of ISO100 and ISO1600, and the medium sensitivity is calculated by the adjustment
values of these 2 conditions.
For target output level, G output average of sensitivity reference value (ISO100) is used, which was
calculated by the reference body.
(4) Shading adjustment (5100K color viewer is shot by this camera, and adjustment is made.)
Camera is faced to the color viewer of LV13 equiv. with ND filter (-3 steps) being put between them, and
the adjustment of white balance distribution is made for 3 areas [Area ① : Central 1936×1926-pixel area;
Area ② : All the divided areas except ③ -areas after dividing (3890×2606-pixels) into (29×25-pixels);
Area ③ ; 4 corners of (4×6-pixels) after dividing (3890×2606-pixel) into (29×25-pixels)]
Area
1936x1926
(5) Gr/Gb compensation adjustment (R/B filter) / Line crawl adjustment
Camera is faced to the light-emitting box (color viewer) of LV13 equiv. with SP3 (R filter) or SP1 (B filter)
being put between them, and the adjustment is made so that the difference in G output average between
B-G line and G-R line, when the whole screen is divided in areas, can fall in the standard range.
(6) Sensitivity ratio adjustment
Camera is faced to the color viewer of LV13 equiv., and the adjustment is made so that the R/G, B/G
output becomes the same as the output ratio of the sensitivity ratio reference value that was calculated by
the reference body. The adjustment is made only under the condition of ISO100, and the average value of
the center (425 pixels × 425 pixels) is used.
①
- Ａ59 ･
Area ③
4x6
Area ②
29x25
Area ③
4x6
-
INC
VBA13001-R.3677.A
Area ③
4x6
Area ③
4x6