Daewoo 531X service manual Focus, Monitor remains Unfocused

Page 24

7. Focus

Monitor remains

unfocused

Check

Focus VR in

FBT

Is

focusYes OK acceptable?

No

Trouble in Focus

circuit (FBT)

22

Image 24

Contents XGA Color Monitor Contents Safety Precautions Safety CheckFire & Shock Hazard Implosion ProtectionGeneral Safety Information Symbols in the manualSymbols as marked on equipment Terms in the manualServicing Precautions General Servicing PrecautionsElectrostatically Sensitive ES Devices General Soldering GuidelinesIC Removal/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement RemovalPower IC, Transistor or Devices Removal/Replacement Diode Removal/ReplacementTechnical Information General Information AbbreviationsPIN Connector Pin SignalOperation and Adjustment Control PanelKey Process OSD Functions Adjust the horizontal picture moire cancellation Alignment Procedure Standard Adjustment ConditionsPre-Adjustment Method to launch the factory modePage Troubleshooting Hints No CharacterNo Character No Raster No RasterMissing Color One color is MissingAbnormal OSD Font Abnormal OSD FontHorizontal Output Circuit VGAUnstable Picture Horizontal Unstable PictureVertical Focus Monitor remains UnfocusedConvergence Poor convergenceAbnormal Picture Horizontal Size Abnormal SizeVertical Size Side-Pincushion Circuit Power Supply Unit P.S.U Trouble in P.S.UU O.K Diagram BlockPCB Layout Main PCB Solder Side CRT PCB Component Side CRT PCB Solder Side Schematic Diagram Power & Connection SectionControl & Vert. out Section Horizontal Section Video Section Exploded View Diagram Important Safety Notice Information of Part DescriptionAbbreviation of Description Electrical Parts List PART-NAME PART-DESCLOC LED Metal Film Diode TVR1G TPA1 686, AHYEON-DONG MAPO-GU SEOUL, Korea