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Daewoo 14Q1 User Manual

Daewoo 14Q1
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Service Manual
38 / 48 / 51 Cm Mono Colour Television
CHASSIS : CP-370
MODEL : 14Q1/20Q1/21Q1
14Q2/20Q2/21Q2
14Q3/20Q3/21Q4
14T1/20T1/21T1
14T2/20T2/21T2
14T3/20T3
DAEWOO ELECTRONICS CO., LTD.
,,@@ÀÀ
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Daewoo 14Q1 Specifications

General IconGeneral
BrandDaewoo
Model14Q1
CategoryCRT TV
LanguageEnglish

Summary

Specifications

Safety Instructions

X-Ray Radiation Precautions

Details hazards and protection measures against X-ray radiation during servicing.

General Safety Precautions

Outlines essential safety guidelines for handling high-voltage equipment.

Product Safety Component Notice

Emphasizes critical safety features of specific electronic components.

Alignment Instructions

AFT, AGC, Screen, White Balance, Focus

Procedures for tuning AFT, AGC, screen, white balance, and focus.

Geometry Adjustments

Controls for vertical and horizontal picture shape and size.

Service Remote Control Functions

Details the functions of the remote control used for service operations.

Integrated Circuit (IC) Descriptions

DW370ASM Micro-controller

Description of the 8-bit micro-controller and its features.

TDA8374A TV Processor IC

Description of the single chip TV processor for IF and video processing.

TDA6106Q Video Output Amplifier

Details the monolithic video amplifier for CRT cathode drive.

TDA8356 Vertical Deflection Circuit

Description of the DC-coupled vertical deflection output circuit.

STR-S5707 Switching Regulator IC

Description of the hybrid IC for switching power supplies.

PCA84C122A Remote Controller IC

Overview of the micro-controller for remote control units.

Circuit Description

Video IF, AFC, and Demodulation

Explains IF signal amplification, AFC, and video demodulation stages.

Tuner AGC, PLL Sound, and Source Select

Covers tuner gain control, sound demodulation, and input source switching.

Synchronization and Colour Processing

Details horizontal/vertical sync, colour decoder, and video filters.

RGB Output, Black Current, and Tuning

Describes RGB output, beam control, and AFC tuning functions.

SECAM Decoder, Delay Line, and Deflection Circuits

Explains SECAM decoding, delay line, and vertical/horizontal deflection systems.

Power Supply and Amplifier Circuits

Covers video amplifiers and the STR-S5707 power supply operation.

Power Supply Protection Features

Details over-current, over-voltage, and thermal shutdown protection.

Troubleshooting Charts

No Raster Troubleshooting Guide

Step-by-step guide to diagnose and fix the absence of a raster.

No Picture (Raster OK) Guide

Troubleshooting steps for when a raster is visible but no picture.

No Vertical Scanning Guide

Steps to resolve issues showing only a single horizontal line.

No Color Troubleshooting Guide

Diagnostic steps for color reproduction problems.

No Sound Troubleshooting Guide

Troubleshooting procedures for audio output issues.

External A/V and OSD Troubleshooting

Diagnosing problems with external inputs and on-screen display.

Remote Control Unit Troubleshooting

Steps to identify and fix remote control malfunctions.

IC DC Voltage Charts

IC 1701 DC Voltage Readings

Chart showing DC voltage points for IC 1701.

IC 1501 DC Voltage Readings

Chart showing DC voltage points for IC 1501.

Other IC DC Voltage Readings

Voltage charts for ICs 1301, 1502, 1503, and 1802.

Electrical Parts List

Q/T Model Difference Part List

CP-370 Inch Difference Part List

Mechanical Exploded View and Parts List

Circuit Diagram

Main Circuit Diagram (VM/TM)

Overall schematic diagram for the TV chassis.

CRT Board and Remote Control Diagrams

Schematics for the CRT section and remote control unit.

Wave Forms

Illustrates key signal timing diagrams for troubleshooting.

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