Daewoo 21T1, 21Q2, 21Q1, 14T2, 21Q4, 14Q2, 20Q1, 14Q1 No Vertical Scaningone Horizontal Line on Screen

Page 41

3. NO VERTICAL SCANING(ONE HORIZONTAL LINE ON SCREEN)

CHECK / REPLACE

P401 & DY ]

CHECK VERTICAL Vcc

+16.5V AT PIN3

&+48V AT PIN6 OF I301(TDA 8356)


	NORMAL				ABNORMAL
CHECK SIGNAL				CHECK / REPLACE
AT PIN1 & PIN2				D401(BYV95C)
OF I301 [REFER TO				D409(BYV95C)
OF I301 [REFER TO				D409(BYV95C)
WAVEFORM		]		R303(1W 15K)

				NORMAL
CHECK / REPLACE			CHECK SIGNAL
	CRT		AT PIN7 OF I301

	NORMAL
				ABNORMAL
			CHECK / REPLACE
			R304, R305
			C304, R307

ABNORMAL

CHECK OUTPUT

WAVEFORM AT PIN46,

PIN47 OF I501

				ABNORMAL
	NORMAL			ABNORMAL
CHECK / REPLACE			CHECK / REPLACE
I301			I501
I301			I501

OK

42

Image 41

Contents Chassis CP-370 Contents Specifications RAY Radiation Precaution Safety InstructionScreen Alignment InstructionsWhite Balance FocusVertical Size Geometry Vertical CenterVertical Slope Vertical S-CORRECTIONPage IC Description Plastic 42 Ysdp Pins Package Block Diagram Cmos Compatible I/O PinsSynchronization Feature AcquisitionDisplay Controller Sdip 52 package Supply voltage Block DiagramPin Description Pin Name Symbol DescriptionCvbs PIN Symbol Description FeaturesRGB AudioBlock Diagram Sound if Input Pin Description NameBeam current limitinq Name DescriptionVertical Guard Luminance EAST-WEST Drive PIN Description TDA4665Base Band Delay Line3Block Diagram Pin Description TDA8395 Secam Decoder Symbol PIN DescriptionTDA6106Q Video Output Amplifier Block Diagram Pin DescriptionVeco I802 PC817TDA8356 DC-coupled vertical deflection circuit TDA7056 BTL Audio Output Amplifier 1 Speaker Model 3Block Diagram 4Pin DescriptionPIN Name Symbol Description STR-S5707 Hybrid IC for a Switching RegulatorMIN TYP MAX Symbol Rating UnitTa=25 Description Terminal Rating UnitTDA8138 5.1V+12V regulator with Disable and Reset TDA 1519BAUDIO Output Amplifier 2 Speaker Model PCA84C 122AIC Remocon PIN Signal DescriptionCircuit Description Colour decoder Vertical synchronizationGeometry processing RGB output and black current stabilization TuningIntegrated video filters Base band delay line TDA4665 Horizontal deflection TDA8356 vertical deflectionVideo amplifiers Power Supply STR-S5707VIN terminal, start-up circuit Oscillator, F/B terminal voltage PinOCP over-current protection function Drive circuitLatch circuit Thermal shutdown circuitNo Raster Trouble Shooting ChartsNo Pictureraster OK No Vertical Scaningone Horizontal Line on Screen No Color Abnormal Normal No Soundpicture OKNo ON-SCREEN Displaypicture OK No External A/VRF OKRemote Control Unit Troublelocal Control OK Input signal IC DC Voltage ChartsUser’s control condition Line VoltageI301TDA8356 I501TDA8374AI502TDA4665 I503TDA8395LOC PART-CODE PART-NAME Part Type Remark Electrical Parts ListPTSPPWA499 Speaker AS DTC-14Q1VM IC AMP 5PTPS60MB Filter Cera TPS 6.0MBEFC-S6ROME3 CEXF1H229V Electro CEXF1H470V Electro 5PXPS45MB Filter Cera TPS-4.5MB Trap Tapping CCZB1H181K Cera DUZ5R1BM Diode Zener Coil Peaking Wire Copper AWG22 1/0.65 TIN Coating R530 RD-AZ203J R703 RD-AZ272J # Front A/V Part List Option Conn ASS’Y LOC Part Name Difference Part ListLOC Part Name Model Remark CP-370 Inch Difference Part ListPage Page Page Page Page Page Page Page Page Page Page