Acer G225HQ Service Manual page 36

1152x864@75Hz
VESA
1280x960@60Hz
SXGA 1280x1024@60Hz
VESA
1280x720@60Hz
1280x800@60Hz
WXGA
1360x768@60Hz
WXGA+ 1440x900@60Hz
WSXGA+ 1680x1050@60Hz
1600x1200@60Hz
1920x1080@60Hz
UXGA
1920x1080@60Hz
1920x1080@60Hz
5.1.3 ADC calibration (Auto color balance adjustment)
~~Analog only, it is not required for DVI-D input source
1. Setup input timing ICL-605( 1280x1024@75Hz ), pattern 42(5-Mosaic pattern with white color block)
with Analog signals from Chroma video pattern generator. (it depends on Scaler IC supplier's
recommendation)
2. Enter factory mode (press "Empowering" & "Power" buttons at the same time to turn on monitor).
3. Move cursor into "Burn-in Mode" tag and select "On" to enable burn-in mode.
4. Close OSD menu then press "Auto" button for auto color adjustment. (This procedure will get optimal
gain/offset(clamp) values)
5. Checking if the picture is ok, or reject this monitor and check its circuit board or wire/cable connection.
5.1.4 Color temperature adjustment
1. Setup input timing to any preset modes, pattern 41(full white color pattern) with Analog signals from
Chroma video pattern generator.
2. Enter factory mode (press "Empowering" & "Power" buttons at the same time to turn on monitor).
3. Move cursor into "Burn-in Mode" tag and select "On" to enable burn-in mode.
4. Make sure ADC calibration (auto color balance adjustment) had already been done.
5. Measure color temperature by Minolta CA-110 (or equivalent equipment).
6. Adjust the color temperature ~~ Two methods can be used to adjust RED, GREEN, BLUE value of
each color temperature, C0/Cool, C1/User & C2/Warm to meet following spec requirement, the 1
method is by using external PC and IIC alignment protocol to do automatic adjustment, and the 2
method is by manually and must be in factory mode.
Color temperature
1600x900 67.5
1800x1000 60
1688x1066 63.981
1650x750 44.955
1680x831 49.702
1792x795 47.712
1904x931 55.935
2240*1089 65.290
2160x1250 75.000
2576x1120 67.158
2200x1125 67.500
2080x1111 66.587
X+-
Y+-
- 36 -
75 108
60 108
60.020 108.000
59.940 74.176
59.810 83.500
60.015 85.500
59.887 106.500
59.954 146.250
60.000 162.000
59.963 173.000
60.000 148.500
59.934 138.500
0.283+(-) 0.03
0.297+(-) 0.03
st
nd