Daewoo 531X service manual Missing Color, One color is Missing

Page 19

3. A Missing Color

One color is

missing

Is input signal	No
normal?

0.7Vpp

Yes

Is the

output of pre-amp No (IC801,TDA9210)

pin 14, 16,18 all normal?

Yes

Check video signal cable or video card.

Trouble in IC801 or its ambient circuit

CRTNo

Cathode (Rk, Gk, Bk)

is normal? RK, GK, BK

About 40V p-p

Yes

Each grid (G1, G2)

voltage normal?

Yes

No Replace CRT

Is video

output IC802 No waveform normal?

Yes

Trouble in 100Vdc line

Trouble in G1,G2 line

Trouble in video output IC802

or ambient

17

Image 19

Contents XGA Color Monitor Contents 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 InformationPin Signal PIN ConnectorControl Panel Operation and AdjustmentKey Process OSD Functions Adjust the horizontal picture moire cancellation Method to launch the factory mode Alignment ProcedureStandard Adjustment Conditions Pre-AdjustmentPage No Character Troubleshooting HintsNo Character No Raster No RasterOne color is Missing Missing ColorAbnormal OSD Font Abnormal OSD FontVGA Horizontal Output CircuitUnstable Picture Unstable Picture HorizontalVertical Monitor remains Unfocused FocusPoor convergence ConvergenceAbnormal Size Abnormal Picture Horizontal SizeVertical Size Side-Pincushion Circuit Trouble in P.S.U Power Supply Unit P.S.UU O.K Block DiagramPCB Layout Main PCB Solder Side CRT PCB Component Side CRT PCB Solder Side Power & Connection Section Schematic DiagramControl & Vert. out Section Horizontal Section Video Section Exploded View Diagram Information of Part Description Important Safety NoticeAbbreviation of Description PART-NAME PART-DESC Electrical Parts ListLOC LED Metal Film Diode TVR1G TPA1 686, AHYEON-DONG MAPO-GU SEOUL, Korea