White Balance, Luminance Adjustment - Dell W2306C Service Manual

6. White Balance, Luminance Adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance
adjustment.
Before started adjust white balance, please set the Chroma-7120 MEM. Channel 3 to Natural colors, MEM.
Channel 4 to 6500K color, MEM. Channel 9 to 9300K colors and MEM. Channel 10 to 5700K colors (Nature
parameter is x =289 ± 15, y = 304 ± 15, 6500 parameter is x = 313 ± 15, y = 329 ± 15, 9300 parameter is x = 283 ±
15, y = 297 ± 15,5700 parameter is x = 328 ± 15, y = 344 ± 15),
The data of Y of all the mode is PC>300,AV>400,S-Video>400,Component>400cd/m2.
How to setting MEM.channel you can reference to Chroma-7120 user guide or simple use " SC" key and " NEXT"
key to modify x,y,Y value and use "ID" key to modify the TEXT description
Following is the procedure to do white-balance adjust
˙after there are no OSD pictures on screen ,Press Number key 0000 will into the factory mode, and press Menu key
to enter the Factory Mode.
˙In the factory mode ,the menu as follows:
5700K
6500K
9300K
NATURAL
Burn In Mode
Auto Balance Auto level adjusts.
Initial NVRAM Initial EEPROM
Boot Power State 【ON/OFF】
The steps of the PC W/B adjustment as follows:
I. Initial the EEPROM
Press "Initial NVRAM" button;
II. Bias (Low luminance) adjustment:
Prepare: ensure the currently mode is PC (VGA)
Press "Auto Balance" button (the image is black and white at the PAT42)
III. Gain adjustment:
1. Switch the chroma-7120 to RGB-mode (with press "MODE" button)
2. Let the signal output the white image (press pattern 105), select one of the color temp (as Natural、6500K、
9300K、5700K) and adjust R、G、B until up to 100±3.
3. Select another color temp and follows as item 2.
The steps of the AV W/B adjustment as follows:
The steps of AV W/B adjustment as follows:
Gain adjustment:
1. Switch the chroma-7120 to RGB-mode (with press "MODE" button)
2. Let the signal output the white image (press pattern 105), select one of the color temp (as Natural、6500K、
9300K、5700K) and adjust R、G、B until up to 100±3.
3. Select another color temp and follows as item 2.
The steps of the SV(S-Video) W/B adjustment as follows:
The steps of SV's W/B adjustment is the same as AV's.
The steps of the CP(component) W/B adjustment as follows:
The steps of CP's W/B adjustment as same as PC's.
Max Brightness measurement:
a. Switch to the full white pattern, in normal mode main menu:
Set <Picture Settings> menu Brightness, Contrast to the max.
b. The Minimum brightness is 400cd/m²
R、G、B
R、G、B the data is the result of R、G、B after
R、G、B W/B adjustment;
R、G、B
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Dell W2306C