No External A/VRF OK, No ON-SCREEN Displaypicture OK

6. NO EXTERNAL A/V(RF OK)

CHECK EXTERNA AUDIO

& VIDEO SIGNAL

AT PIN2 & 17 OF I501

RESPECTIVELY


	ABNORMAL			NORMAL
CHECK RCA JACK		OK	CHECK WAVEFORM
CHECK RCA JACK			CHECK WAVEFORM
			AT PIN7 & 8 OF I501


	ABNORMAL
CHECK / REPLACE I701		OK	CHECK / REPLACE I501
CHECK / REPLACE I701			CHECK / REPLACE I501

7. NO ON-SCREEN DISPLAY(PICTURE OK)

CHECK HORI. & VER. SYNC

AT PIN46 & 45

OF I701 RESPECTIVELY

NORMAL

ABNORMAL

CHECK / REPLACE

CHECK OSD R/G/B SIGNAL

Q301, Q302(VER. SYNC)

& BLANKING SIGNAL

D401, R414(HORI. SYNC)

AT PIN 47, 48, 49 & 50 OF I701

ABNORMAL

NORMAL

CHECK WAVEFORM

CHECK OSD IN/PUT WAVEFORM

AT PIN23, 24, 25, 26

AT PIN 38, 39 OF I701

OF I501

ABNORMAL

NORMAL

CHECK / REPLACE

PERI. COMP

I501

I701 & PERI. COMP

Page 44

Image 44

Daewoo 20T1, 21Q2, 21Q1, 14T2, 21Q4, 14Q2, 20Q1, 14Q1, 21T2, 20Q3, 14T1, 20T2 No External A/VRF OK, No ON-SCREEN Displaypicture OK

Contents

Chassis CP-370 Contents Specifications Safety Instruction RAY Radiation Precaution Alignment Instructions ScreenWhite Balance Focus Geometry Vertical Center Vertical SizeVertical Slope Vertical S-CORRECTIONPage IC Description Cmos Compatible I/O Pins Plastic 42 Ysdp Pins Package Block Diagram Synchronization Feature AcquisitionDisplay Sdip 52 package Supply voltage Block Diagram Controller Pin Name Symbol Description Pin Description Cvbs Features PIN Symbol Description Audio RGB Block Diagram Pin Description Name Sound if Input Beam current limitinq Name DescriptionVertical Guard Luminance EAST-WEST Drive PIN Description TDA4665Base Band Delay Line3Block Diagram Pin Description Symbol PIN Description TDA8395 Secam Decoder Block Diagram Pin Description TDA6106Q Video Output Amplifier I802 PC817 Veco TDA8356 DC-coupled vertical deflection circuit 3Block Diagram 4Pin Description TDA7056 BTL Audio Output Amplifier 1 Speaker Model STR-S5707 Hybrid IC for a Switching Regulator PIN Name Symbol Description Symbol Rating Unit MIN TYP MAXTa=25 Description Terminal Rating Unit TDA8138 5.1V+12V regulator with Disable and Reset TDA 1519BAUDIO Output Amplifier 2 Speaker Model PIN Signal Description PCA84C 122AIC Remocon Circuit Description Colour decoder Vertical synchronizationGeometry processing RGB output and black current stabilization TuningIntegrated video filters Base band delay line TDA4665 TDA8356 vertical deflection Horizontal deflection Power Supply STR-S5707 Video amplifiersVIN terminal, start-up circuit Oscillator, F/B terminal voltage Pin Drive circuit OCP over-current protection functionLatch circuit Thermal shutdown circuit Trouble Shooting Charts No Raster No Pictureraster OK No Vertical Scaningone Horizontal Line on Screen No Color No Soundpicture OK Abnormal Normal No External A/VRF OK No ON-SCREEN Displaypicture OK Remote Control Unit Troublelocal Control OK IC DC Voltage Charts Input signalUser’s control condition Line Voltage I501TDA8374A I301TDA8356I502TDA4665 I503TDA8395 Electrical Parts List LOC PART-CODE PART-NAME Part Type Remark PTSPPWA499 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 Difference Part List LOC Part Name CP-370 Inch Difference Part List LOC Part Name Model RemarkPage Page Page Page Page Page Page Page Page Page Page

Daewoo 20T1, 21Q2, 21Q1, 14T2, 21Q4, 14Q2, 20Q1 No External A/VRF OK, No ON-SCREEN Displaypicture OK

Models: 14Q3 20T2 21Q2 21Q1 21T2 14Q1 21Q4 20T1 20Q1 14T2 20Q2 21T1 14Q2 14T1 20Q3

6. NO EXTERNAL A/V(RF OK)

7. NO ON-SCREEN DISPLAY(PICTURE OK)