AOC LV20E351, Service Manual

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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 setting the Chroma-7120 MEM. Channel 1 to 9300 colors, MEM .
Channel 2 to 6500 color, and MEM. Channel 3 to 9300 colors, (9300 parameter is x = 283 ± 15, y = 297 ± 15, Y =
SPC. ± 7 cd/m2; 6500 parameter is x = 313 ± 15, y = 329 ± 15, Y = SPC.± 7 cd/m
2
)
PC PC AV
Color Temp. 9300 6500 9300
x 0.283 0.313 0.283
y 0.297 0.329 0.297
Y
250
±7
250
±7
290
±
20
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
˙
Press Number key 100 Æ 9 Æ 9 Æ 9 will into the factory mode, and press Menu key the OSD will show menu and a
word F at Right top of Menu .
˙ In the factory mode select MORE function will into Bias and Gain adjustment.
1. ADC Adjustment:
AL Æ Auto level adjust.
RG, GG, BG Æ R, G, B Gain adjusts.
RB, GB, BB
Æ
R, G, B Bias adjusts.
2. SCALER Adjustment:
CO, BR Æ Contrast and Brightness adjust.
RG, GG, BG Æ R, G, B Gain adjusts.
RB, GB, BB Æ R, G, B Bias adjusts.
S9, S6, ST, SH Æ Save 9300, 6500, 9300 color temperature.
R9, R6, RT, RH Æ Recall 9300, 6500, 9300-color temperature.
BI Æ Setup Burn-in mode ON / OFF.
ISP Æ Set ISP ON/OFF.
PP
Æ
Set PIP ON/OFF.
WH Æ Set Wireless Headphone ON/OFF.
SR Æ Set SRS ON/OFF.
CC Æ Set Close Caption ON/OFF.
VC
Æ
Set V Chip ON/OFF.
EX Æ Exit MORE function to factory mode menu.
II. Bias (Low luminance) adjustment:
1. Press “ AUTO” button,
2. Set the contrast on OSD window to the value=51, color (user) R, G, B set to “
50 ”
3. Adjust the brightness on OSD until chroma 7120 measurement reach the value Y>390 cd/m
2
III. Gain adjustment:
A. Adjust 9300 color-temperature:
1. Set the Contrast of OSD function to 45 and Adjust Brightness to chroma-7120 Y>230 cd/m
2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM.channel to Channel 01 (with up or down arrow on chroma-7120)
4. The lcd-indicator on chroma-7120 will show x = 283 ± 15, y = 297 ± 15, Y =250 ± 7 cd/m
2
5. Adjust the Color(user)Mode: RED on OSD window, until chroma 7120 indicator reached the value R=100
6. Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached the value
G=100
7. Adjust the Color (user) Mode: BLUE on OSD window, until chroma-7120 indicator reached the value B=100
8. Repeat above procedure (Item 5,6,7) until chroma-7120 RGB value meet the tolerance =100±2
9. Switch the chroma-7120 to xyY mod e With press “MODE” button
10. Press Color (9300) on OSD window to save the adjustment result
B.Adjust 6500 color-temperature: