Daewoo 531X service manual Vertical

Page 23

6-2. Vertical

Unstable

picture

		Is the
		12V,-12Vdc
		line voltage is
		correct?
			Yes
			Yes
	40V
	40V	Is the
		Is the
		pulse of pin 6 of
		the IC401
	-10V	correct?
		50Vp-p

No

Is the output of pin 8 of IC501

all normal?

No

Check the IC501 and its ambient circuit

No

Yes

Yes

Refer to P. S. U

Trouble in vertical D. Y

Check IC401 and its ambient circuit

21

Image 23

Contents XGA Color Monitor Contents Implosion Protection Safety PrecautionsSafety Check Fire & Shock HazardTerms in the manual General Safety InformationSymbols in the manual Symbols as marked on equipmentGeneral Servicing Precautions Servicing PrecautionsGeneral Soldering Guidelines Electrostatically Sensitive ES DevicesRemoval IC Removal/ReplacementReplacement Small-Signal Discrete Transistor Removal/ReplacementTechnical Information Power IC, Transistor or Devices Removal/ReplacementDiode Removal/Replacement Abbreviations General InformationPin Signal PIN ConnectorControl Panel Operation and AdjustmentKey Process OSD Functions Adjust the horizontal picture moire cancellation Method to launch the factory mode Alignment ProcedureStandard Adjustment Conditions Pre-AdjustmentPage No Character Troubleshooting HintsNo Character No Raster No RasterOne color is Missing Missing ColorAbnormal OSD Font Abnormal OSD FontVGA Horizontal Output CircuitUnstable Picture Unstable Picture HorizontalVertical Monitor remains Unfocused FocusPoor convergence ConvergenceAbnormal Size Abnormal Picture Horizontal SizeVertical Size Side-Pincushion Circuit Trouble in P.S.U Power Supply Unit P.S.UU O.K Block DiagramPCB Layout Main PCB Solder Side CRT PCB Component Side CRT PCB Solder Side Power & Connection Section Schematic DiagramControl & Vert. out Section Horizontal Section Video Section Exploded View Diagram Abbreviation of Description Important Safety NoticeInformation of Part Description PART-NAME PART-DESC Electrical Parts ListLOC LED Metal Film Diode TVR1G TPA1 686, AHYEON-DONG MAPO-GU SEOUL, Korea