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

Page 22

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

Contents Service Manual XGA COLOR MONITOR Model 710BCONTENTS Fire & Shock Hazard SAFETY PRECAUTIONSSafety Check Implosion ProtectionSymbols as marked on equipment GENERAL SAFETY INFORMATIONSymbols in the manual Terms in the manualSERVICING PRECAUTIONS General Servicing PrecautionsElectrostatically Sensitive ES Devices General Soldering Guidelines“Small-Signal” Discrete Transistor Removal/Replacement IC Removal/ReplacementReplacement 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 KEYCONTRAST ADJUSTMENT PROCESSRECALL 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 Rasterinput pin of IC501 Unstable pictureIs H.Sync correct?6-2. V.OSC/Deflection Circuit Unstable or Abnormal picture7. Focus Monitor remains unfocused7-1. Dynamic Focus Focus is poor8. Convergence Poor convergencechanged, is the H.size changed? 9. Abnormal Picture 9-1. Horizontal SizeAbnormal H.Size 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? Pre-Adjustment ALIGNMENT PROCEDUREStandard Adjustment Conditions 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 PART-NAME CIRCUIT BOARD ELECTRICAL PARTS LISTPART-CODE 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 PRINTED DATE NOV.1998 OVERSEAS SERVICE DEPTServ ce Manual DAEWOO ELECTRONICS CO