Acer B203W manual LED No Backlight

Page 35

W/LED No Backlight

Check the 14V voltage input

OK

NG

Check the adapter

Check ON/OFF signal

OK

NG

Check Interface board

Check IC801 pin12=12V?

NG

OK

Change Q805.Q808 or Q810

Check the pin9&10 of IC801 have PWM wave

NG

OK

Check the resonant wave of pin3 & pin7 for T801

Change Q801/Q804/Q811/Q812

OK

Replace IC801

OK

NG

Check Q802/Q803

Check the output of T801,T802

OK

NG

Change T801,T802

Check connecter & lamp

35

Image 35

Contents Acer B203W Service Guide Version Release Date Revision History TPV model Service Guide Version and RevisionConventions CopyrightDisclaimer TrademarksPreface Special Notes On LCD Monitors PrecautionsTable Of Contents Description Chart of B203WIntroduction ScopeMeasurement systems Electrical RequirementsStandard Test Conditions TTL LCD Monitor General SpecificationGeneral Specifications Functional Block Diagram LCD Panel SpecificationTFT LCD Module－Power Specification Backlight Unit Electrical CharacteristicsOptical Specifications Horizontal Vertical Support TimingMonitor Block Diagram Main Board Diagram Software Flow Chart Remark Main Board Layout Symbol DescriptionInstallation Attaching/Removing The Base Height AdjustmentMonitor Pivot TiltSwivel Front panel controls External ControlsEColor Management OSD How to Adjust a Setting Adjusting the picture Page Logo Using The Right Power CordDisassembly Procedure Page Okng No PowerNo Picture LED is orange OK NG Panel Power CircuitKey Board Power Board No power LED No Backlight Connector Information DVI Connector Chapter Exploded Diagram Model B203WPicture Description Part ListFFC Cable To GND From Mvcc to Esdvcc to Main BoardChange the type of resistor R301 from 0805 to Both 223 and 252 foot-print LAY Power board Feedback Layout CN603 Key board