Daewoo 531X service manual Abnormal Picture Horizontal Size, Abnormal Size

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9.Abnormal Picture

9-1. Horizontal Size

* At first, adjust controls in the OSD Menu

Abnormal

H.Size

	Is
	the DC level			No
	of the base of Q517
	of the base of Q517
	changeable?
		Yes
		Yes
	Is the
=1100Vp-p	collector pulse
=1100Vp-p	of Q505 correct?
		Yes			No
		Yes
	Is the


	cathode waveform
80-310Vpp	of D509
80-310Vpp	correct?
		Yes			No
					No

Trouble in H.OSC/

Deflection Circuit

Refer to Horizontal Output circuit

Is

the DC level of IC501 pin 11 changeable ?

Trouble in Horizontal output circuit Check the B+ and anode voltage of CRT.

Trouble in L503, C520 or their ambient circuit

Yes		Check IC501
		pin 11
		pin 11

*Normally anode voltage of CRT is approximately, 24.7KV

*Scan B+ are as follow :

MODE	B+ Voltage

VGA	60Vdc

Super VGA	72Vdc

54KHz	110Vdc

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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 RemovalTechnical Information Power IC, Transistor or Devices Removal/ReplacementDiode Removal/Replacement 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 Abbreviation of Description Important Safety NoticeInformation of Part Description Electrical Parts List PART-NAME PART-DESCLOC LED Metal Film Diode TVR1G TPA1 686, AHYEON-DONG MAPO-GU SEOUL, Korea