Dell 2209WA Service Manual
Also see for 2209WA - UltraSharp - 22" LCD Monitor: Setup guideDatasheetUser guideSetup guide
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Service Manual5Chapter 3- CIRCUIT THEORYBlock DiagramDell 2209WA consists of a main body and a stand (base). The main bodycontains a Innolux LCD module with 6 CCFL lamps, There are 4pcs PCBAin this monitor, one is power & interface & Audio board , one is invert board ,one is keypad which is OSD control, and one is USB stretch board locatedon the right side back cover.. The block diagram is shown as below.(fig.1)AC Line FilterPFCcontrolRectifier andfilter circuit+12V DC outputFeedbackBrightness ControlPower savingcircuit+5V DC outputStandbyPower PWMcircuitContol SignalFrom/TO IF BoardMain PowerPWM circuit Rectifier andfilter circuitAC Input90V~264VTo InverterAUDIO DetectPFC+PWMcontrollerIC SG6901 Feedbackcontrol(OPTION)+24V /+12V/+5VOVP circuitPower Saving controlPFC boostcircuitTransfor andIsolate(Standby Powertransformer)DC JackAUDIO ON/OFF ControlBulkE-CAP24V ON/OFFcircuitFeedbackcontrolCCFL ON/OFF ControlStart upcircuit24V ON/OFF ControlRectifier&FilterCircuitGNDPWMcontrol+24V DC outputto Inverter+5V DC outputPWMcontrolTransfor andIsolate(Main Powertransformer)12V DCregulator andON/OFF circuitStandbycontrollerIC LD7575POWER |
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