Unstable picture, Is H.Sync, Input pin of IC501 | Daewoo 710B

Unstable

6.Unstable Picture 6-1. Horizontal

Unstable

picture

	Is H.Sync		No
	input pin of IC501		No


	correct?
		Yes
		Yes

	Is the	No
	pin 3 of IC501	No


	5V?

Yes

Trouble in IC501

Check H.Sync Out of Micom or its ambient circuits.

Check the value of

C503, R502

20

Image 22

Daewoo 710B service manual Unstable picture, Is H.Sync, input pin of IC501, correct?, Is the, pin 3 of IC501

Contents

Service Manual XGA COLOR MONITOR Model 710B CONTENTS Fire & Shock Hazard SAFETY PRECAUTIONSSafety Check Implosion Protection Symbols as marked on equipment GENERAL SAFETY INFORMATIONSymbols in the manual Terms in the manual SERVICING PRECAUTIONS General Servicing Precautions Electrostatically Sensitive ES Devices General Soldering Guidelines “Small-Signal” Discrete Transistor Removal/Replacement IC Removal/ReplacementReplacement Removal Diode Removal/Replacement Power IC, Transistor or Devices Removal/ReplacementTECHNICAL INFORMATION GENERAL INFORMATION Abbreviations CAUTIONS FOR ADJUSTMENT AND REPAIR PIN CONNECTORCaution For Servicing OPERATION & ADJUSTMENT ADJUSTMENT KEY CONTRAST ADJUSTMENT PROCESSRECALL BRIGHTNESS OSDOn-Screen Display Menu ROTATION Choose different preset color temperatures or set your own customized Self Diagnosis 1. No Character TROUBLESHOOTING HINTSNo Character 2. No Raster No Raster 3. A missing Color One color is missing 4. Abnormal OSD Font Abnormal OSD Font 5. Horizontal Output Circuit Trouble in Horizontal output circuit No Raster input pin of IC501 Unstable pictureIs H.Sync correct? 6-2. V.OSC/Deflection Circuit Unstable or Abnormal picture 7. Focus Monitor remains unfocused 7-1. Dynamic Focus Focus is poor 8. Convergence Poor convergence changed, is the H.size changed? 9. Abnormal Picture 9-1. Horizontal SizeAbnormal H.Size 1.Check B+ section of TDA9109 and its ambient circuit 9-2. Vertical Size Abnormal V.Size 10. High Voltage Circuit Trouble in H.V circuit No Raster 11. Side-Pincushion Circuit Side-Pincusion distortion is excessive or barrel 12. Power Supply Unit P.S.U Trouble in P.S.U 13V DC? of C104 13V DC?8.7V DC? Pre-Adjustment ALIGNMENT PROCEDUREStandard Adjustment Conditions Main Adjustment l Repeat e,f,g,h,i,j DIAGRAM PCB LAYOUT Main PCB Component Side Main PCB Solder Side Video PCB Component Side Video PCB Solder Side Page EXPLODED VIEW DIAGRAM Important Safety Notice REPLACEMENT PARTS LISTAbbreviation of Description PART-NAME CIRCUIT BOARD ELECTRICAL PARTS LISTPART-CODE PART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PART-NAME PART-NAME PART-CODEPART-DESC PART-NAME PART-CODEPART-DESC PART-NAME PRINTED DATE NOV.1998 OVERSEAS SERVICE DEPTServ ce Manual DAEWOO ELECTRONICS CO