Acer AL922 AL922 Monitor Service Guide - Page 27

5. INVERTER BOARD 5.1 Description The Inverter board is designed for lighting up the back-lights of LCD module. 5.2 Electrical characteristics 5.2.1 FOR Fujitsu PANEL FLC48SXC8V MIN. TYP. INPUT VOLTAGE 11.4V 12.0V INPUT CURRENT -------- 2A Normal BACKLIGHT VOLTAGE LAMP CURRENT DRIVING FREQUENCY EFFICIENCY 40KHz -------- 700V rms. 7mA rms 50KHZ 80% Vin ON/OFF sequence -------- 1S MAX. 12.6V _ -------- 8mA rms 60KHz COMMENT 12V±5% Vin=12V, Vbrite=3.3V Vin = 12V,max brightness OLP TIME -------- 3S _ Open lamp protection time BRIGHTNESS RANGE Brightness control Brightness 10% 0V _ -------_ 220cd/m2 100% 3.3V _ 3.3V, brightness Max. Strike voltage at 0°C 1600 Vrms _ _ Operating life time 20,000 hrs _ _ (note) Note: Life time (hr) can be defined as the time in which it continues to operate under the condition: Ta=25±2°C, IL =7 mArms until one of the following event occurs: 1. When the brightness becomes 50 % 2. When the startup voltage (Vs) at 0°C becomes higher than the maximal value of Vs specified above. 27