Power Supply Unit P.S.U, Trouble in P.S.U | Daewoo 710B instruction

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Daewoo 710B service manual Power Supply Unit P.S.U, Trouble in P.S.U

Contents

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