Daewoo 531X service manual Unstable Picture Horizontal

Page 22

6.Unstable Picture

6-1. Horizontal

Unstable

picture

Is the

pulse of pin 26 of Yes the IC501

correct?

Trouble in IC501 or its ambient circuit

No

Is the

pulse of pin 28 of Yes the IC201

correct?

5Vpp

No

	Is the	Yes
	input H.Sync	Yes


	correct?

No

Trouble in Signal Cable or 15P D-Sub Connector

Check IC501 and its ambient circuit

Check IC201 and its ambient circuit

20

Image 22

Contents XGA Color Monitor Contents Fire & Shock Hazard Safety PrecautionsSafety Check Implosion ProtectionSymbols as marked on equipment General Safety InformationSymbols in the manual Terms in the manualServicing Precautions General Servicing PrecautionsElectrostatically Sensitive ES Devices General Soldering GuidelinesSmall-Signal Discrete Transistor Removal/Replacement IC Removal/ReplacementReplacement RemovalDiode Removal/Replacement Power IC, Transistor or Devices Removal/ReplacementTechnical Information General Information AbbreviationsPIN Connector Pin SignalOperation and Adjustment Control PanelKey Process OSD Functions Adjust the horizontal picture moire cancellation Pre-Adjustment Alignment ProcedureStandard Adjustment Conditions Method to launch the factory modePage No Character Troubleshooting HintsNo 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 Information of Part Description Important Safety NoticeAbbreviation of Description Electrical Parts List PART-NAME PART-DESCLOC LED Metal Film Diode TVR1G TPA1 686, AHYEON-DONG MAPO-GU SEOUL, Korea