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File name BenQ_Q7T4SM.pdf

Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure 1. Alignment procedure (for function adjustment) A. Preparation: 1. 2. Setup input timing ICL-605( 1280x1024@75Hz ), 32-Grays pattern. Setup unit and keep it warm up at least 30 minutes. B. Timing adjustment: 1. Enter factory setting area (press "ENTER", "EXIT" and then press "SOFTPOWER"). 2. Check the settings to following values: Contrast = 50 Brightness = 90 OSD time = 20 Color = Normal Language = English Then, turn off the monitor power. 3. Turn on power enter user area. C. Color balance adjustment: 1. Enter factory setting area (press "ENTER", "I-Key" and then press "SOFTPOWER"). 2. Setup input timing ICL-605(1280x1024@75Hz), 32-Gray pattern (pattern 48) . 3. Press "I-KEY", and than OSD will show "White Balance" item and than press "ENTER" button to do auto color. 1 Confidential Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure D. Color adjustment: 1. Setup input timing ICL-605, white pattern . 2. Confirm auto color adjustment had already done. 3. Measure color temperature by Minolta CA-110 (or equivalent equipment). 4. Check the color temperature Bluish, Reddish & Normal. The color temperature specification as follows: White Balance (Bluish, 9300K set on OSD) White Balance (Reddish, 5800K set on OSD) White Balance (sRGB, 6500K set on OSD) X+Y+X+Y+X+Y+0.283+(-) 0.03 0.297+(-) 0.03 0. 326+(-) 0.03 0. 342+(-) 0.03 0.313+(-) 0.03 0. 329 +(-) 0.03 2 Confidential Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure 5. Setup input timing , 32 -Gray pattern. To check if there are any abnormal display problems of preset timing modes . No. 1 2 3 4 5 6 7 8 9 10 Check the following preset timings with General pattern: Mode H 720Ч400 @ 70Hz 31.468 640Ч480 @ 60Hz 31.469 640Ч480 @ 75Hz 37.500 800Ч600 @ 60Hz 37.879 800Ч600 @ 75Hz 46.875 1024Ч768 @ 60Hz 48.363 1024Ч768 @ 75Hz 60.023 1152x864 @ 75Hz 67.500 1280Ч1024 @ 60Hz 63.981 1280Ч1024 @ 75Hz 79.976 V 70.8 59.940 75.000 60.317 75.000 60.004 75.029 75.000 60.020 75.025 6. Checking if the picture is no good, reject this monitor. 7. To check the power consumption by disabling "burn-in mode" setting 8. To clear user data and program complete DDC data to monitor by IIC bus communication. E. Writing EDID file: 1. Setup a PC with DDC card. 2. Connect PC to monitor with a D-sub signal cable. 3. Please refer to the C212 for the correct EDID file. 4. Runs the writing program to write the EDID file into EEPROM . 5. Read EEPROM data and confirm it to match with the C212 document definition. F. Command definition : PC Host will send 0x7C IIC slave address and then following 4 bytes command I2C Send Command Byte1 Byte2 Byte3 Byte4 OK N.A. Remark Write Contrast to MCU RAM Write Brightness to MCU RAM Write Red Gain to MCU RAM Write Green Gain to MCU RAM Write Blue Gain to MCU RAM Read Contrast from MCU RAM Read Brightness from MCU RAM Read Red Gain from MCU RAM by color index Read Green Gain from MCU RAM by color index Read Blue Gain from MCU