Daewoo 710B service manual Vertical Size, Abnormal V.Size

Page 28

9-2. Vertical Size

9-2. Vertical Size

Abnormal

V.Size

Is

changeable the No DC voltage of IC401 pin 1?

Yes

Trouble V.OSC/

Deflection Circuit

Refer to V.OSC/Deflection circuit

Is

the 3.5Vdc of pin Yes 23 of the IC501?

No

Check the IC501 and its ambient circuit

Check the IC401 and its ambient circuit

26

Image 28

Contents Service Manual XGA COLOR MONITOR Model 710BCONTENTS SAFETY PRECAUTIONS Safety CheckFire & Shock Hazard Implosion ProtectionGENERAL SAFETY INFORMATION Symbols in the manualSymbols as marked on equipment Terms in the manualSERVICING PRECAUTIONS General Servicing PrecautionsElectrostatically Sensitive ES Devices General Soldering GuidelinesIC Removal/Replacement Replacement“Small-Signal” Discrete Transistor Removal/Replacement RemovalDiode Removal/Replacement Power IC, Transistor or Devices Removal/ReplacementTECHNICAL INFORMATION GENERAL INFORMATION AbbreviationsCAUTIONS FOR ADJUSTMENT AND REPAIR PIN CONNECTORCaution For Servicing OPERATION & ADJUSTMENT ADJUSTMENT KEYADJUSTMENT PROCESS RECALLCONTRAST BRIGHTNESSOSDOn-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 Raster3. A missing Color One color is missing4. Abnormal OSD Font Abnormal OSD Font5. Horizontal Output Circuit Trouble in Horizontal output circuit No RasterUnstable picture Is H.Syncinput pin of IC501 correct?6-2. V.OSC/Deflection Circuit Unstable or Abnormal picture7. Focus Monitor remains unfocused7-1. Dynamic Focus Focus is poor8. Convergence Poor convergence9. Abnormal Picture 9-1. Horizontal Size Abnormal H.Sizechanged, is the H.size changed? 1.Check B+ section of TDA9109 and its ambient circuit9-2. Vertical Size Abnormal V.Size10. High Voltage Circuit Trouble in H.V circuit No Raster11. Side-Pincushion Circuit Side-Pincusion distortion is excessive or barrel12. Power Supply Unit P.S.U Trouble in P.S.U13V DC? of C104 13V DC?8.7V DC? ALIGNMENT PROCEDURE Standard Adjustment ConditionsPre-Adjustment Main Adjustmentl Repeat e,f,g,h,i,j DIAGRAM PCB LAYOUT Main PCB Component SideMain PCB Solder Side Video PCB Component Side Video PCB Solder Side Page EXPLODED VIEW DIAGRAM Important Safety Notice REPLACEMENT PARTS LISTAbbreviation of Description CIRCUIT BOARD ELECTRICAL PARTS LIST PART-CODEPART-NAME PART-DESCPART-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 OVERSEAS SERVICE DEPT Serv ce ManualPRINTED DATE NOV.1998 DAEWOO ELECTRONICS CO