Acer X203H Acer X203H Service Guide - Page 36

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 1st method is by using external PC and IIC alignment protocol to do automatic adjustment, and the 2nd method is by manually and must be in factory mode. Color temperature (C0/cool on OSD) X+Y+Luminance 0.283+(-) 0.03 0.297+(-) 0.03 Color temperature X+- Y+- (C1/User on OSD) Luminance Color temperature X+- 0.313+(-) 0.03 Y+- 0.329+(-) 0.03 (C3/Warm on OSD) Luminance 7. Move cursor into "Burn-in Mode" tag and select "No" to disable burn-in mode. 8. Turns off the monitor power. 5.1.5. Writing EDID data into monitor 1. Setup a PC with DDC card. 2. Connect PC to monitor with a D-sub signal cable. 3. Please refer to the Q212 for the correct EDID file. 4. Runs the writing program to write the analog EDID data into EEPROM for analog input(ie. 15-pin D-sub). - 36 -