Daewoo 710B service manual A missing Color, One color is missing

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3. A missing Color

3. A missing Color

One color is

missing

Is input signal

No

normal?

0.7Vpp

Yes

Is the

output of pre-amp No (IC801, KA2500) pin 21, 24, 26 all

normal?

Yes

Check video signal cable or video card.

Trouble in IC801 or its ambient circuit

CRT				No
Cathode (Rk, Gk, Bk)				No
Cathode (Rk, Gk, Bk)
is normal?			RK, GK, BK
		About 40V p-p
	Yes

Each grid (G1, G2)
voltage normal?
	Yes
	Yes
					No

Replace CRT
Replace CRT

	Is video			No
	output IC803 waveform			No
	output IC803 waveform
	normal?
		Yes
		Yes


	Trouble in 80/120V DC
	line

Trouble in 80/120V DC line

Trouble in video output circuit, IC803 or ambient

17

Image 19

Contents XGA COLOR MONITOR Model 710B Service ManualCONTENTS Implosion Protection SAFETY PRECAUTIONSSafety Check Fire & Shock HazardTerms in the manual GENERAL SAFETY INFORMATIONSymbols in the manual Symbols as marked on equipmentGeneral Servicing Precautions SERVICING PRECAUTIONSGeneral Soldering Guidelines Electrostatically Sensitive ES DevicesRemoval IC Removal/ReplacementReplacement “Small-Signal” Discrete Transistor Removal/ReplacementDiode Removal/Replacement Power IC, Transistor or Devices Removal/ReplacementTECHNICAL INFORMATION Abbreviations GENERAL INFORMATIONCAUTIONS FOR ADJUSTMENT AND REPAIR PIN CONNECTORCaution For Servicing ADJUSTMENT KEY OPERATION & ADJUSTMENTBRIGHTNESS ADJUSTMENT PROCESSRECALL CONTRASTOSDOn-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 RasterOne color is missing 3. A missing ColorAbnormal OSD Font 4. Abnormal OSD FontTrouble in Horizontal output circuit No Raster 5. Horizontal Output Circuitcorrect? Unstable pictureIs H.Sync input pin of IC501Unstable or Abnormal picture 6-2. V.OSC/Deflection CircuitMonitor remains unfocused 7. FocusFocus is poor 7-1. Dynamic FocusPoor convergence 8. Convergence1.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 SizeTrouble in H.V circuit No Raster 10. High Voltage CircuitSide-Pincusion distortion is excessive or barrel 11. Side-Pincushion CircuitTrouble in P.S.U 12. Power Supply Unit P.S.U13V DC? of C104 13V DC?8.7V DC? Main Adjustment ALIGNMENT PROCEDUREStandard Adjustment Conditions Pre-Adjustmentl Repeat e,f,g,h,i,j DIAGRAM Main PCB Component Side PCB LAYOUTMain 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-NAMEPART-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