Summary - Nikon D300 Repair Manual

7. Summary

The summary on each adjustment is as follows:
(1) Gr�Gb difference compensation adjustment (G filter; G�line crawl only)
・When the DG-PCB is replaced, write the serial number.
・When the DG-PCB or image sensor holder unit is replaced, write the unique data.
��irst, take a picture of the QR code that is attached to the image sensor holder unit, then read the shot
image with the hand scanner. Write "D300_0001 ～ .csv" data in the DG-PCB.
※ The data will be added every two weeks (e.g. D300_0001.csv, D300_0002.csv, D300_0003.csv...), so
copy this added file to the same folder of the adjustment
Camera is faced to the light�emitting bo� (color viewer) of LV13 equiv. with SP2 (G filter) being put
between them. G�line crawl (38�5×2�1� pi�els) is divided into (2�×25) blocks, and the adjustment is made
so that the difference between Gr and Gb output can fall in the standard range.
（2）Dark current adjustment
Take a picture of the blackout surface (against dark background) and adjust the shooting conditions in total
darkness. ※ When the adjustment is made, use eyepiece cap (or black cloth).
(3) Sensitivity adjustment
Camera is faced to the color viewer of LV13 equiv. with ND filter (�� 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) of (425×425 pi�els), which was
deviated to the right from the center by 425 pi�els, can reach the target output level (appro�. 75�LS�).
The actual adjustment of the gain value is made only under the condition of ISO200 and ISO1600, and the
medium sensitivity is calculated by the adjustment values of these 2 conditions.
�or target output level, G output average of sensitivity reference value (ISO200) 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 (�4 steps) being put between them, and
the adjustment of white balance distribution is made for 3 areas [Area ① : Central 2128×141��pi�el area;
Area ② : All the divided areas e�cept ③ �areas after dividing (42�8×2����pi�els) into (3�×25�pi�els);
Area ③ ; 4 corners of (4×��pi�els) after dividing (42�8×2����pi�el) into (3�×25�pi�els)]
(5）Gr�Gb compensation adjustment (R�� filter) � Line crawl adjustment
Camera is faced to the light�emitting bo� (color viewer) of LV13 equiv. with SP3 (R filter) or SP1 (� 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
With the shutter tester of LV9, 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 �SO1��, and the average value of (425 pi�els × 425 pi�els) which was
deviated to the right from the center by 425 pi�els is used.
Area ①
2128�1416
- Ａ  ・
software.
Area ③
4��
Area ②
3��25
Area ③
4��
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VBA20001-R.3720.A
Area ③
4��
Area ③
4��