Acer B203W manual Panel Power Circuit, Ok Ng

Page 32

3. Panel Power Circuit

White screen

Measure Q301 base is low level?

OK

Check CN301 is solder and Q301,Q302 is OK?

NG

X401 oscillate waveform is normal

OK NG

Check reset circuit of

U401 is normal

Replace X401

Check Correspondent	NG
Check Correspondent
component.

OK

Replace PANEL

NG	Check Correspondent
	component.

OK

Replace U401

32

Image 32

Contents Acer B203W Service Guide Service Guide Version and Revision Version Release Date Revision History TPV modelCopyright DisclaimerTrademarks ConventionsPreface Precautions Special Notes On LCD MonitorsTable Of Contents Chart of B203W IntroductionScope DescriptionMeasurement systems Electrical RequirementsStandard Test Conditions LCD Monitor General Specification TTLLCD Panel Specification General Specifications Functional Block DiagramElectrical Characteristics TFT LCD Module－Power Specification Backlight UnitOptical Specifications Support Timing Horizontal VerticalMonitor Block Diagram Main Board Diagram Software Flow Chart Remark Symbol Description Main Board LayoutInstallation Height Adjustment Attaching/Removing The BaseMonitor Pivot TiltSwivel External Controls Front panel controlsEColor Management OSD How to Adjust a Setting Adjusting the picture Page Using The Right Power Cord LogoDisassembly Procedure Page No Power OkngNo Picture LED is orange Panel Power Circuit OK NGKey Board Power Board No power LED No Backlight Connector Information DVI Connector Exploded Diagram Model B203W ChapterPart List Picture DescriptionFFC Cable Main Board To GND From Mvcc to Esdvcc toChange the type of resistor R301 from 0805 to Both 223 and 252 foot-print LAY Power board Feedback Layout CN603 Key board