Acer AL512 AL512 Monitor Service Guide - Page 30

AL512/513 Service Manual 11. ADJUSTMENT 11.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 3. ESD protection is needed before adjustment. 11.2. MAIN ADJUSTMENTS NO. FUNCTION 1. V-com Voltage 2. Eeprom Initial 3. White Balance 4. Geometry DESIGNATION R124 (VCOM ADJ) Function Key Function Key Function Key 11.3. ALIGNMENT PROCEDURES Adjustment Conditions and Precautions: (A). Power supply voltage: AC 110/120V± 10% 60 Hz± 5%, AC 220/240V± 10% 50 Hz ± 5%. (B). Warm up time: The display must be power ON for at least 30 minutes at full white pattern before starting alignments. This is especially critical in color temperature and white balance adjustments. (C). Signals: reference the front detail specifications and timing table. Video : reference the front detail specifications. 1. Adjustment of V-com Voltage: A. Timing : 1024x768@60Hz. B. Pattern : The picture of " Shut down windows" or Full screen pixel ON/OFF pattern. C. Adjust R124 to let the center of the screen no flash. 2. Eeprom Initial: A. Timing : 1024x768@60Hz. B. Pattern : Cross hatch. C. Switch off the power and press the "▲" and " 2 " key simultaneously, then switch on the power. At this time we can enter into the factory mode when press the " 1 "key. D. Select the "EEPROM INIT" item and press " 2 "key to reset the Eeprom. 3. White Balance Adjustment : A. Timing : 1024x768@60Hz. B. Pattern : Full white. C. Set CA110 color analizer at the center of screen and along a perpendicular to the screen at 20cm from the display. D. Move "▼" key to select the " WHITE BALANCE" item in the factory mode and press " 2 "key, then the white balance will be auto dadjusted. E. Color temperature verification: (Set Brightness and Contrast to Maximum) -29- 9/20/2002