Acer X203H Acer X203H Service Guide - Page 59

capable of expanding any source resolution to a highly uniform and sharp image or down scaling from 1980x1020, combined with the critically proven integrated 8 bit triple-ADC and patented Rapid-lock digital clock recovery system. It also support detect mode and DPMS control. 3.) RTD2120L: Control unit, it controls all the functions of this interface board, just like the OSD display setting, the adjustable items, adjusted data storage, the external IIC communication, support DDC2Bi. . 4.) EEPROM: We use 24C016 to store all the adjustable data, user settings and HDCP Key and use 2 of 24C02 to store DVI and D-SUB EDID data. A-2.) Control board introduction : There are 6 keys for user's control which includes "Menu", "Right", "Left", "Auto", "Empowering", and "Power". The following descriptions are the introduction of these keys. (1) "Menu" key: to enter sub-menus or select items. (2) "Right" key: to select previous and to increase adjustment (3) "Left" key: to select next and to decrease adjustment (4) "Auto" key: to perform auto adjustment and Exit key (5) "Empowering": to Open the Acer eColor Management OSD and access the scenario modes (6) "Power" key: to turn/off power of monitor (7) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal operating condition). Amber light means DPMS off (Power Saving). A-3.) Power board diagram: EMI Filter Rectifier and filter Isolation power transformer Rectifier and filter Inverter circuit PWM contrller Switching element Feedback Isolation Fig.1 - 59 - Rectifier and filter Audio circuit LDO regulator