AOC VGA1581, Service Manual, Page: 10 / 41

15" CDT Color Monitor VGA1581
10
3. Factory preset timings adjustment:
A. When you turn on the monitor, the function LEDs will light Up simultaneously for a while, then
extinguish.
B. You can press hold the Up/Func tow key simultaneously turn on the monitor, the most left four LEDs
will light Up for a while then exitinguish
C. Input Geometric factory mode, then you can select one of the sixteen Functions, Including, Contrast,
Brightness, H-Size, H-Center, V-Size, V-Center, Pincushion, Trapezoid, Rotation, V-Moire, H-Moire,
Pin-Balance, Parallelogram, Corner, V-Linear and V-Linear Balance Simply, Press the Function key
and the LED will be light UP corresponding to the one selected, then press the Up/Down keys to get
the factory presetting parameter value to your satisfaction.
D. Then change mode or power turn off, the display setting will be saved.
E. Then you will press the turn OFF monitor again, the factory preset timings adjustment is finished.
F. Function Control LED Display Fashion:
1.Contrast
2.Brightness
3.R-Bias
4.G-Bias
5.B-Bias
6.R-Gain
7.G-Gain
8.B-Gain
9.ABL
10.VE
11.HE
4. White Balance add Luminance adjustment:
A. Function keys specification:
Press UP and DOWN and Power on keys, LED5, LED6, LED7, LED8 are lighting, then all LEDs are on /off.
Choose the function, Press UP and DOWN to adjust it. The detailed LED adjustment as following:
1.Contrast
2.Brightness
3.R-Bias
4.G-Bias
5.B-Bias
6.R-Gain
7.G-Gain
8.B-Gain
9.ABL
10.VE
11.HE
B.Adjusting process instruction
1.Degaussing firstly, turn on the power and enter the white balance setting mode, then warm it up until steadily.
2.Raster Max adjustment: set Chroma 2000 at Timing 106,Raster Pattern as 104,G-Bias fixup 4F.Brightness and
contrast at max, adjust the R-bias and FBT Screen button, test screen center to set the grounding as 2.5+-
0.2cd/m2, X=265
±
10; Y=290
±
10 according to brightness
3.Raster Cut off adjustment: set Chroma 2000 at timing 106,pattern 104, and press brightness function key to
make Raster just cut off, Y=0.10+-0.02cd/m2.
4.small window adjustment: set Chroma 2000 as timing 102, pattern 105,adjust R- gain
，
G-gain
，
B-gian to
make Y=150
±
2 cd/m
2
X = 283
±
10,Y = 297
±
10
5.Full white screen adjustment: set Chroma 2000 as timing 129, pattern 105, adjust ABL to make Y=90
±
2 cd/m
2
.