Focus, Monitor remains unfocused | Daewoo 710B guide

7. Focus

7. Focus

Monitor remains

unfocused

Check

Focus VR in

FBT

Is

focusYes OK acceptable?

No

Trouble in Focus

circuit (FBT)

22

Image 24

Daewoo 710B service manual Focus, Monitor remains unfocused

Contents

Service Manual XGA COLOR MONITOR Model 710B CONTENTS SAFETY PRECAUTIONS Safety CheckFire & Shock Hazard Implosion Protection GENERAL SAFETY INFORMATION Symbols in the manualSymbols as marked on equipment Terms in the manual SERVICING PRECAUTIONS General Servicing Precautions Electrostatically Sensitive ES Devices General Soldering Guidelines IC Removal/Replacement Replacement“Small-Signal” Discrete Transistor Removal/Replacement Removal Power IC, Transistor or Devices Removal/Replacement Diode Removal/ReplacementTECHNICAL INFORMATION GENERAL INFORMATION Abbreviations PIN CONNECTOR CAUTIONS FOR ADJUSTMENT AND REPAIRCaution For Servicing OPERATION & ADJUSTMENT ADJUSTMENT KEY ADJUSTMENT PROCESS RECALLCONTRAST BRIGHTNESS OSDOn-Screen Display Menu ROTATION Choose different preset color temperatures or set your own customized Self Diagnosis TROUBLESHOOTING HINTS 1. No CharacterNo 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 Unstable picture Is H.Syncinput pin of IC501 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 9. Abnormal Picture 9-1. Horizontal Size Abnormal H.Sizechanged, is the H.size changed? 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 of C104 13V DC? 13V DC?8.7V DC? ALIGNMENT PROCEDURE Standard Adjustment ConditionsPre-Adjustment 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 REPLACEMENT PARTS LIST Important Safety NoticeAbbreviation of Description CIRCUIT BOARD ELECTRICAL PARTS LIST PART-CODEPART-NAME PART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAME PART-CODE PART-NAMEPART-DESC PART-CODE PART-NAMEPART-DESC PART-CODE OVERSEAS SERVICE DEPT Serv ce ManualPRINTED DATE NOV.1998 DAEWOO ELECTRONICS CO