Samsung VLUU NV10, Service Manual

Page: 56 / 163

56
Ⅳ. ADJUSTMENT
3. CCD GAIN
A. Purpose
The ideal CCD saturation level is 1VPP. But, the real CCD saturation level is under 1 VPP (500 ~ 550 mVpp).
To change the 500 ~ 550 mVpp to 1 Vpp level, set the minimum Analog gain.
This adjustment is for minimizing the gabs of CCD saturation level of each camera by adjusting the Analog gain.
B. Behavior
As for the NV10 uses two kinds of ND filter, there are two type of adjustments.
[Description of the algorithm]
①
Check the brightness level in the Liveview mode.
②
Check the difference between the target and checked brightness.
And then set the default CCD gain.
③ Check the availability of the brightness value.
④ Depending on the result, decide OK or NG.
[Standards for the Adjustment]
- Specification of the tools : Light source that can block the external light source
- Color temperature: 3200K ± 50
- Brightness: LV 8.2±0.1 ( ±0.05 recommended)
C. Spec (Standard for checking defect)
- From the PV-2 steps, the adjustment actualizes. The followings are temporary standard.
①
9181 - 341 < Average brightness of the test < 9181 + 341
②
170 < CCD gain < 265
D. Procedure
①
Save the adjust103.txt and adjust_t files on the Root directory of the SD card and insert the card.