Acer AC501 AC501 Monitor Service Guide - Page 12

2. OPERATION THEOREM A. Power Supply (1) Transfer AC source to DC source that supply all the circuit power. It includes: !"+13V: For video pre-amp circuit, parts of horizontal and vertical deflection circuit. !"+63V: For booster circuit. !"+7.5V: For CRT heater and u-P power. !"+73V: For video AMP. Circuit. !"-11.7V: For vertical deflection negative power. B. Deflection Produce YOKE deflect ion current of horizontal and vertical, CRT H.V and bi as that makes screen rast er. C. Video Amplify the video signal and add the signal to the cathode of CRT to produce video on the screen. D. Digital Controllable With the EEPROM and PROGRAM, the micro-processor(u-P) control all the picture performance. From the key control, the user can change t he H-size, V-size, R-gain¡L¡Letc. 12