Daewoo 710B service manual Abnormal OSD Font

Page 20
4. Abnormal OSD Font

4. Abnormal OSD Font

Abnormal OSD Font

Is menu

key selected? Is OSD Font exist?

Yes

One color is missing

Yes

Is the

output of IC802 (pin 13, 14, 15) normal?

Yes

Refer to Missing Color

* If menu key selected.

No

 

 

 

Is Heater

No

 

Trouble in

 

 

 

Voltage (CRT PWB)

 

Heater voltage

 

 

 

 

 

 

 

 

 

 

 

about 6V?

 

 

line.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

Refer to trouble in P.S.U

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Troubie in

 

 

 

 

 

 

 

 

 

IC802 or its

 

 

 

 

 

 

 

 

 

ambient circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

Trouble in IC802

 

 

 

 

 

 

 

and its ambient

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

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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 RemovalTECHNICAL INFORMATION Power IC, Transistor or Devices Removal/ReplacementDiode Removal/Replacement GENERAL INFORMATION AbbreviationsCaution For Servicing PIN CONNECTORCAUTIONS FOR ADJUSTMENT AND REPAIR OPERATION & ADJUSTMENT ADJUSTMENT KEYADJUSTMENT PROCESS RECALLCONTRAST BRIGHTNESSOSDOn-Screen Display Menu ROTATION Choose different preset color temperatures or set your own customized Self Diagnosis No Character TROUBLESHOOTING HINTS1. No 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.U8.7V DC? of C104 13V DC?13V 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 Abbreviation of Description REPLACEMENT PARTS LISTImportant Safety Notice CIRCUIT BOARD ELECTRICAL PARTS LIST PART-CODEPART-NAME PART-DESCPART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-NAME PART-DESC PART-CODEPART-NAME PART-DESC PART-CODEPART-NAME PART-DESC OVERSEAS SERVICE DEPT Serv ce ManualPRINTED DATE NOV.1998 DAEWOO ELECTRONICS CO
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