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Daewoo DTQ-14Q1FS User Manual

Daewoo DTQ-14Q1FS
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Service Manual
Color Television
DAEWOO ELECTRONICS CO., LT D .
CHASSIS
:
CN-201A/B
NTSC-M SYSTEM
MODEL
:
DTQ-14Q1FS, DTQ-14Q2TS
DTQ-14Q3FS, DTQ-14T1AS
DTQ-14T2FS, DTQ-20Q1FS
DTQ-20Q2FS, DTQ-20Q3FS
DTQ-20T1AS, DTQ-20T2AS
DTQ-20T1FS, DTQ-20T2FS
DTQ-20T3FS, DTQ-21T1FS
DTQ-21T2FS, DTQ-21T5FS
DTQ-21T9FS, DTQ-20T1FC
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Daewoo DTQ-14Q1FS Specifications

General IconGeneral
BrandDaewoo
ModelDTQ-14Q1FS
CategoryTV
LanguageEnglish

Summary

FEATURES

ELECTRICAL SPECIFICATIONS

POWER INPUT

Specifies the AC voltage and frequency range for power supply.

POWER RATING

Details the power consumption for different model sizes.

INTERMEDIATE FREQUENCIES

Lists the carrier frequencies for video, sound, and color signals.

AUDIO OUTPUT RATING

Indicates the power output for the audio system.

SPEAKER

Specifies speaker impedance and power handling.

ANTENNA INPUT IMPEDANCE

States the impedance requirement for antenna connection.

TUNING RANGES

Outlines the frequency bands covered by the TV tuner.

PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO – VIDEO PRODUCTS

FIRE & SHOCK HAZARD

Safety precautions regarding component placement, protective devices, soldering, and AC leakage testing.

X-RADIATION

Guidelines for preventing X-ray emission from CRT and high-voltage circuits.

IMPLOSION

Precautions for handling picture tubes to prevent implosion and use of proper replacement parts.

TIPS ON PROPER INSTALLATION

Recommendations for safe and optimal TV placement to ensure ventilation and prevent hazards.

CONTROL VIEW

Overview of Your Equipment

Introduces the TV's components and remote control functions.

Your TV's Front Panel

Describes the buttons and jacks located on the television's front panel.

REMOTE CONTROL UNIT

IMPORTANT SERVICE NOTES

X-RAY RADIATION PRECAUTION

Details on high voltage limits and X-ray protection circuit checks.

SAFETY PRECAUTION

Essential safety measures for servicing, including isolation transformers and picture tube handling.

PRODUCT SAFETY NOTICE

Emphasizes safety-related characteristics of components and proper replacement procedures.

SERVICE NOTES

General advice on component replacement, lead dress, and wiring practices.

CN-201A/B BLOCK DIAGRAM

GENERAL ADJUSTMENTS

GENERAL

Basic picture adjustments for optimal performance and color shading correction.

SCREEN ADJUSTMENT

Procedure to adjust the screen voltage for proper picture cutoff.

FOCUS ADJUSTMENT

Steps to achieve the clearest picture by adjusting the focus control.

HORIZONTAL CENTER ADJUSTMENT

Method to align the horizontal width of the picture.

VERTICAL CENTER ADJUSTMENT

Procedure to center the picture vertically using V.DC adjustment.

VERTICAL HIGHT ADJUSTMENT

Steps to adjust the picture height using V.Size control.

X-RADIATION PROTECTION CIRCUIT TEST

Test procedure for the X-ray protection circuit after deflection system service.

White balance ADJUSTMENT

Adjusting R/G/B bias and drive for accurate white balance.

SUB-BRIGHTNESS ADJUSTMENT

Procedure to set the gradation pattern for optimal brightness.

CONVERGENCE POSITIONING

Mechanical adjustments for the convergence magnet assembly and yoke.

COLOR PURITY ADJUSTMENT

Steps to ensure accurate color reproduction by adjusting purity magnets and yoke.

CONVERGENCE ADJUSTMENTS

Procedures for adjusting center and circumference convergence using magnets and yoke.

OPERATION CHARACTERISTICS OF POWER BLOCK(1801)

STR-S5707 BLOCK DIAGRAM

Block diagram illustrating the internal structure of the power IC.

PIN DESCRIPTION

Details the function of each pin on the STR-S5707 IC.

OTHER FUNCTION

Explains built-in protection circuits like OVP and TSD.

EXPLANATION OF CIRCUIT OPERATION

Detailed description of the power supply's start-up, oscillator, and protection circuit operations.

OCP (OVER CURRENT PROTECTION) CIRCUIT

CONFIGURATION OF OCP CIRCUIT

Circuit diagram showing the components of the overcurrent protection system.

EXPLANATION OF THE OPERATION

Describes how the OCP circuit protects the set from overload.

TROUBLE SHOOTING CHART S

NO POWER (NO OUTPUT SECOND POWER)

Troubleshooting steps for a TV with no power or secondary output.

DON'T OPERATE POWER ON

Diagnostic guide for when the TV does not power on correctly.

NO PICTURE

Steps to diagnose and resolve issues related to a blank or missing picture.

NO SOUND

Troubleshooting procedures for audio problems in mono and stereo models.

CH DON'T STOP

Diagnostic steps for problems with channel selection or stopping.

NO COLOR

Troubleshooting guide for cases where the TV displays no color.

NO VERTICAL DEFLECTION

Steps to diagnose and fix issues with vertical picture display.

ON SCREEN DISPLAY DOES NOT OPERATE

Troubleshooting for when the On-Screen Display (OSD) is not functioning.

REMOTE CONTROL DOES NOT OPERATE

Diagnostic steps for a non-functional remote control.

DESCRIPTION OF SEMICONDUCTORS

PIN ASSIGN OF IC LC864728V(I701)

PIN ASSIGN OF IC TDA 7057Q (1603)

PIN ASSIGN OF IC LA7841 (I301)

PIN ASSIGN OF IC TDA 9852 (1601)

PARTS LIST (DTQ-21T1FS)

DTQ-20T1FC DIFFERENT PARTS LIST

OPTION LIST

CN-201A/B 14"/20"/21" OPTION(MAIN PCB)

Lists optional components for main PCB across different models.

CN-201A/B 14"/20"/21" AUDIO OPTION

Details optional audio components for main PCB across different models.

ENGINEER NOTE

CN-201A/B SCHEMATIC DIAGRAM

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