File Data At Adjustment; Maintaining The Grayscale Chart - Sony HDC-P1 Maintenance Manual

3-1-3. File Data at Adjustment

The fi le structure of the adjustment data of this unit is as follows.
Scene
Lens
File data Total adjustment data
Reference
OHB
. Lens fi le is used for compensating the deviation generated by switching the lens extender from OFF to
ON and for compensating the difference in the characteristics between lenses. This fi le is stored in the
camera. For electrical adjustments, mount the lens that is actually used.
. The reference fi le stores the custom paint data adjusted by the video engineer. This fi le is stored in the
camera and memory stick. Therefore, store this data in the memory stick fi rst before starting adjustment,
and restore this data from the memory stick after adjustment.
. OHB fi le is used for adjustment for the CCD block maintenance. This fi le is stored in the camera.

3-1-4. Maintaining the Grayscale Chart

It is preferable to use an 89.9%-refl ective grayscale chart for electrical adjustments.
If a refl ective chart is not available, use a well-maintained pattern box and a transparent grayscale chart
for adjustments.
Before beginning adjustment, set the illumination of the light source (or the luminous intensity on the
chart surface) properly proceeding as follows and set the color temperature to 3200 K exactly by adjusting
light.
Information on the refl ective grayscale chart (16 : 9)
Recommended chart
The refl ective grayscale chart (16 : 9) is commercially available.
Product name: Refl ective grayscale chart
Supplier: MURAKAMI COLOR RESEARCH LABORATORY
Handling precautions
. Do not touch the chart's surface with bare hands.
. Do not subject the surface to dirt or scratches.
. Do not use for a long time under direct sunlight.
. Protect the chart from excessive moisture or harmful gas.
. Avoid resting articles against the case.
. When the chart is not used for a long period and is stored, open the case and dry the chart for about an
hour once or twice a month.
Replacement period when the chart is used as the reference
The refl ective grayscale chart should be replaced every two years if it used as the reference. Because the
chart deteriorates with time and proper adjustment cannot be achieved.
Replacement period varies depending on the chart storage condition.
3-2 (E)
HDC-P1