Dell 2208WFP Service Manual

Contents

Dell 2208WFP Service Manual Manual pdf 17 page image

Service Manual16-+1.8V is generated from Regulator U102 which is supplied by+3.3V through C106 filtering,3. FACTORY PRESET TIMING TABLEStandard Resolution Horizontal Frequency(KHz)Vertical Frequency (Hz)720 x 400 31.469 70.087640 x 480 31.469 59.940640 x 480 37.500 75.000800 x 600 37.879 60.317800 x 600 46.875 75.0001024 x 768 48.363 60.0041024 x 768 60.023 75.0291152 x 864 67.500 75.0001280 x 1024 64.000 60.0001280 x 1024 79.976 75.025VESA1680 x 1050 65.160 60.0IBM DOS 720 x 400 31.469 70.0874. Power On/Off SequencyHardware power On/OffWhen power cord plug into AC socket, Power provides 26V and DC_5V.DC_5V is main voltage for panel and Regulator U101.DC_3.3V is coming from Regulator U101, DC_3.3v is main voltage for U108. When DC_3.3V input toU108 and U108 reset circuit active, U108 all registers will be set to default, that means finish hardwarepower on.When pull out power cord from AC socket,the system shut down instantly for no supplySoftware power On/Off- When press power key, U108 #9 receives low pulse, then U108(RTD2122L) will be wake up and sendcontrol signals(at 20,39pin) to on CCFL and switch 5.0v to panel module, at the same time,U105 makethe VGA/DVI cable input signal source display normal on panel if the VGA/DVI cable input signal isactive- If power ON, U108 #1 (LED_GREEN) will send out low potential, and then LED GREEN on.- If power saveing, U108 #48 (LED_Amber) will send out low potential, and then LED Amber on.- If power ON or power saveing, when press power key, U108 #9 receives low pulse, then U108 will besleeping and turn off backlight, at the same time, the panel will lose +5V.The Panel_Vcc, Backlight_En, CLK/DATA output to panel will follow the following sequency.