Dell W2306C, Service Manual

Page: 34 / 104

Dell W2306C
33
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 R
、
G
、
B
6500K R
、
G
、
B the data is the result of R
、
G
、
B after
9300K R 、 G 、 B W/B adjustment;
NATURAL R
、
G
、
B
Burn In Mode
Auto Balance Æ Auto level adjusts.
Initial NVRAM Æ 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/m
²