Adjustment; Adjustment Conditions And Precautions - AOC Vibrant VL7A9DA Service Manual

4-1

ADJUSTMENT CONDITIONS AND PRECAUTIONS

Adjustments should be undertaken only on following function: contrast, brightness focus, clock, h-position, v-
position, red, green, blue since 6500 color & 7800 color.
4-2 ADJUSTMENT METHOD
Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button
to select the function or done the adjustment.
1. 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 5 to 7800 color and
MEM. Channel 6 to 6500 color, (our 7800 parameter is x = 296 ±10, y = 311 ±10, Y = 160 ±
5cd/m2 and 6500 parameter is x = 313 ±10, y = 329 ±10, Y = 160 ±5 cd/m
How to setting MEM.channel you can reference to chroma 7120 user guide or simple use " SC" key and
" NEXT" key to modify xyY value and use "ID" key to modify the TEXT description
Following is the procedure to do white-balance adjust
Press MENU button during 2 seconds along with plug in the DC-power cord will activate the factory
mode, and the OSD screen will located at
I. Bias (Low luminance) adjustment:
1.
2.
3.
II. Gain
a. adjust 7800 color-temperature
4.
5.
6.
7.
8.
9.
4. ADJUSTMENT
left top of panel
Press " AUTO" button, and wait for message " Pass", check the Black level value on
OSD should be large than 30, if less than 30 that means the offset calculation FAIL,
please manual adjust the black level to value 43
Set the contrast and brightness o n OSD window to maximal value, RGB to "50"
adjust the VR501 on INTERFACE board until chroma 7120 measurement reach the
2
±5 cd/m
value Y=240 cd/m
adjustment :
Set the Contrast of OSD function to 40, Brightness to 48
Switch the chroma-7120 to RGB-mode (with press "MODE" button )
switch the MEM.channel to Channel 05 ( with up or down arrow on chroma 7120 )
The lcd-indicator on chroma 7120 will show x = 296 ±10, y = 311 ±10, Y = 160 ±5
2
cd/m
Adjust the RED on OSD window u ntil chroma 7120 indicator reached the value
R=100
adjust the GREEN on OSD, until chroma 7120 indicator reached G=100
.
2
2
)