Samsung CL29Z30MQTXXAZ Schematic

COLOR TELEVISION RECEIVER

Chassis : KS7D(N)_Timecop Model : CL29Z30MQTXXAZ

COLOR TELEVISION RECEIVER FEATURES

■■

GREEN CRT

■

Turbo Voice

SERVICE

Manual

CL-29Z30MQ

This Service Manual is a property of Samsung Electronics Co.,Ltd.

Any unauthorized use of Manual can be punished under applicable

International and/or domestic law.

Printed in Korea

AA82-03666A

Table of Contents

Chapter 1 Precaution

■ 1-1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

■ 1-2 Servicing Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

■ 1-3 Static Electricity Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

■ 1-4 Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2 Product Specification

■ 2-1 Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

■ 2-2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

■ 2-3 Specifications Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

■ 2-4 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Chapter 3 Alignment & Adjustment

■ 3-1 Service Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

■ 3-2 How to Access Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

■ 3-3 Factory Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

■ 3-4 Service Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

■ 3-5 Replacements & Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Chapter 4 Exploded View & Part List

■ 4-1 CL29Z30MQTXXAZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Chapter 5 Electrical Part List

■ 5-1 CL29Z30MQTXXAZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Chapter 6 Troubleshooting

■ 6-1 Checkpoints by Error Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

■ 6-2 Troubleshooting Procedures by Error Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

■ 6-3 Troubleshooting Procedures by ASS'Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

■ 6-4 Troubleshooting by Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Chapter 7 Block Diagram

■ 7-1 Overall Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

■ 7-2 Partial Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Chapter 8 Wiring Diagram

■ 8-1 Overall Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

■ 8-2 Pin Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Chapter 9 PCB Diagram

■ 9-1 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

■ 9-2 CRT Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Chapter 10 Schematic Diagram

■ 10-1 MAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

■ 10-2 POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

■ 10-3 Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Chapter 11 Operation Instruction & Installation

■ 11-1 Product Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Chapter 12 Disassembly & Reassembly

■ 12-1 Overall Disassembly & Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

Chapter 13 Circuit Description

■ 13-1 Overall Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

■ 13-2 Partial Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2

Chapter 14 Reference Information

■ 14-1 Option Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

■ 14-2 Technical Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2

Troubleshooting

Samsung Electronics 6-1

6. Troubleshooting

6-1 Checkpoints by Error Mode

■ Power LED: Check that the LED works when turning the Tact Switch ON/OFF

■ LED Indicators: See table 6-2-1 Basic Troubleshooting: LED Diagnosis on the Front Panel.

■ In case of a power failure or abnormal screen, check the following items.

1) Check that the power cord is correctly connected to electrical source equipment.

2) Check that the Tact Switch has been pressed.

3) Check that the signal cable is properly connected.

4) Check that channel setting has been set.

■ When the picture is abnormally displayed on the screen, display the Test pattern and check the adjustment status.

Troubleshooting

6-2 Samsung Electronics

■ Troubleshooting Mechanism :

- The System Blcok has the last output terminal, VCTI, which shows the internal Test pattern.

- The Power Block supplies power to the Deflection Block

- The System Block receives all signal inputs, the signal-processed signal is sent to CRT Ass'y.

Deflection and focus are controlled by the Deflection Block

Troubleshooting by Modules

1) Enter Service Mode (In SET STANDBY status, if you press "Mute", "1", "8", "2" and "Power" in sequence on the remote control, the screen is

turned on and the Service Mode screen appears.)

2) Check if the System Block is out of order. Press OPTION → TEST PATTERN → Right direction key:

The TOSHIBA pattern,COLOR BAR, BLACK pattern and WHITE pattern etc are displayed on the screen. If the pattern is not displayed or is displayed abnormally, the VCTI or the System Block is out of order.

3) Check if the Power BLOCK, which supplies power to the System block and the Deflection blcok, is out of order. If you cannot turn the screen on by pressing the POWER ON/OFF button or the screen repeatedly turns on and off when pressing the POWER ON/Off button, check if the Power BLOCK is out of order.

4) Check if the Deflection Block is out of order. When the screen is not properly displayed and the left or right side of the picture is shrunk, or the top or bottom of the screen is expanded or shrunk, check if the Deflection Blcok is out of order.

Troubleshooting

Samsung Electronics 6-3

6-2 Troubleshooting Procedures by Error Modes

6-2-1 Basic Troubleshooting: Diagnosis of LED on the Front Panel

Power Description

○

This happens when the Tact Switch is not pressed or the power cord is disconnected.

○→◑

If you press the power switch of the or the channel key on the remote control when in St-BY status, the screen will be turned on. If the LED blinks and the screen is not displayed, check the connection between the Power and the Main Board.

◑ : Light is Blinking ○ : Light is Off

Troubleshooting

6-4 Samsung Electronics

6-3 Troubleshooting Procedures by ASS'Y

1. NO Power

2. NO Video

Main B+ Check

29” : 123V

(STD-BY : 95V)

OK : Main B+connect

STD-BY Mode ?

(Main B+ : 95V)

Main B+ 123V OK? Q401 Check

B/5.0V, B/3.3V Check

SMPS BLOCK Check

: IC801S & Diodes

Supply Voltage Check

A/5.0V, A/3.3V

NONO

Q812A(A/3.3V), Q801(A/5.0V) Input/Out Voltage Check

OKOK

ICV201 Check

T444S Check

IC501 Check

Q812A(A/3.3V), Q810(A/5.0V) Check

ICV201 Problem

→ Change

ICV201 Problem

Heater Voltage Check

V999S Heater 6.0~6.3 Vcc

IC301 Supply Voltage Check

Video B+ Check

(IC501 6PIN) : 180V~210V

IC301 Check

: +16.5V, -16.5V

ICV201 Pin Voltage Check

(25, 43, 72Pin : 3.3V, 70Pin : 5.0V)

R418, R516 Check

IC501 Check

ICV201 Check

Troubleshooting

Samsung Electronics 6-5

3. NO Sound

4. Fly Back Lion Badness

Sound B+ Check

(IC601 3PIN)

ICV201 Sound Output Check

: Pin 84(R), 85(L)

ICV201 Problem → Change

: 8V~14V

NO NO

Video B+ Check

(IC501 6PIN) : 180V~210V

Sound Supply Voltage

IC602 Output Check

IC602 Problem → Change

Line Check

: CN601

IC501 Check

Speaker &

Speaker Wire Check

FP801S

Power cord

ICT501

T401

ICV201 Problem → Change

IC801S

Q401

FD801S

IC301S

QE01

IC804

IC601

IC901

IC201S

TU01S

Troubleshooting

6-6 Samsung Electronics

6-4 Troubleshooting by Blocks

6-4-1 Troubleshooting Main Board

1. Tuner Diagnosis The RF / CTV signal is transmitted to the Tuner of the Main Board. If the signal is not received, check the following items.

- Power supply: 5V, 33V

- Check for RF defects: Check the IF output

- Check for AUDIO defect: Check the SIF Signal output

Troubleshooting

Samsung Electronics 6-7

2. Micom Diagnosis VSP/MSP/DRX Block ETC

- Power supply: 3.3V, 5V, 8V

- Check for input defects: Y/C(CVBS, S-VHS), 480i Y/Pb/Pr signal

Troubleshooting

6-8 Samsung Electronics

3. External Input Diagnosis This consists of AV1/2, S-VHS and Component signal inputs as well as monitor output (Video, Audio). The signals are sent to VCTI and the selected signals are output. If the signal input or output does not work, check the following items.

- Check for input defects: Check the Micom input pin.

- Check for output defects: Check JAR701 (for RF/AV) or JA701(for comp/S_VHS)

Troubleshooting

Samsung Electronics 6-9

4. TDA7266SA / TDA7297SA (Audio Processor) Diagnosis This receives the signal from the Audio Processor (VCTI) and outputs the signal in7W+7W / 10W + 10W sound.

- Power supply : 14V

- Check for input defects : AMP-R,AMP-L

- Check for output defects : L+, L-, R+,R-

Troubleshooting

6-10 Samsung Electronics

6-4-2 Troubleshooting Deflection Block

■ Countermeasures by Deflection Types

1. The screen is blank and only the relay repeats close and open when turning the power on.

▶ This happens when the vertical voltage or vertical signal is not supplied, and because the Micom operates for 5 to 10

seconds and then turns the power off by force as it cannot detect the vertical signal.

2. CHECK POINT

- Check that the vertical output voltage is measured in the FBT terminal.

→ VCC (+) : +16.5V

VCC (-) : -16.5V

▶ If you cannot measure the output voltage, check that the collector voltage of the horizontal TR is 1360V.

If the voltage is measured, the problem is a defect in the FBT unit.

(When you don't have an oscilloscope, and you can hear the high-voltage sound, you can determine that the horizontal TR

is normal.)

- Is the vertical input waveform output from the VCTI VDP Pin.

10. Schematic Diagram

Samsung Electronics

Schematic Diagram

10-1

10-1 MAIN

This Document can not be used without Samsung’s authorization.

Power

Signal

TP07

TP08

TP09

TP07

TP08

Schematic Diagram

10-2 Samsung Electronics

10-2 POWER

Power

Signal

This Document can not be used without Samsung’s authorization.

TP01

TP02

TP04

TP05

TP06

TP01

TP02

TP04

TP06

TP05

Samsung Electronics

Schematic Diagram

10-3

10-3 Sound

This Document can not be used without Samsung’s authorization.

Reference Information

Samsung Electronics 14-1

14. Reference Information

14-1 Option Byte

Green

KS7B

Model

VOLT

Master

S/W

Tact

S/W

Tilt VM

PIP X-Ray

DNIe

-Jr

21"

Ear-

Phone

BACK

S-VIDEO

SIDE

S-VIDEO

LNA

A/V

Multi

(Philippine)

Remocon

(AA59-)

Sound

Output

Micom

Energy

Star

TIMER/

ST-BY

Remark

Korea

CT-29K10V

AC220V

0 x x x x X x

X 0

X X X

TM75

00317A

7W x2

AA97-16044A

T_TGNNKU_1000

X ST-BY

CT-29M20V

AC220V

0 x x x x X

X 0 X X X

7W x2

X ST-BY

CT-29M16V

AC220V

x x

X 0

X 7W x2

X ST-BY

CT-29K12V

AC220V

0 x x x x X x x 0 X X X 7W x2 X ST-BY

CT-29K6V

AC220V

x x

X x

x 0 X X

X 7W x2

X ST-BY

USA

CANADA

TXR2728GX/XAA

AC120V

x 0 X x x 0

x 0 X X X

TM75

00316B

7W x2

AA97-16044A

T_TGNNKU_1000

O Timer

TXR2728GX/XAC

AC120V

0 X x

0 x

x 0

PANAMA

CL29M16MQDXXAP AC220V

x 0

x x 0

x 0 X X

TM75

00316B

10W x2

AA97-16044A

T_TGNNKU_1000

X Timer

MEXICO

CL29M16MQDXXAX AC120V

0 x

x x

x 0 X X

TM75

00316B

10W x2

AA97-16044A

T_TGNNKU_1000

O Timer

Others

Latin

CL29M16MQDXGSU Free Volt

0 x

x x

x 0

X X X

TM75

00316B

10W x2

AA97-16044A

T_TGNNKU_1000

X Timer

CL29M16MQDXSTR

Free Volt

0 x

x x x 0 X X X

10W x2

X Timer

CL29M16MQDXXAO Free Volt

0 x

x x

x 0

X X X 10W x2

X Timer

CL29M16MQDXRCL

Free Volt

x 0 X

x x x x 0 X X X 10W x2 X Timer

Reference Information

14-2 Samsung Electronics

Mono

A type of audio interface that transmits audio signals through a single channel. Through a mono interface, it is hard to experience stereophonic sound and sound is played only by one speaker.

Reception Sensitivity Amplification

A signal amplification technique that amplifies weak broadcasting signals by applying satellite technology to provide a better visual quality even for users in regions where only weak broadcasting signals are available.

Stereo

A type of audio interface that transmits audio signals through 2 channels. Stereo transmits audio signals for the right and left channels so that you can experience stereophonic sound, and the sound is played with 2 speakers.

English Caption

A function that shows English caption or text information included in the broadcasting signal or video tape. You can use this function to study English by watching AFKN or CC marked video tapes.

Video/Audio Ports

You may experience poor visual and audio quality when watching a video tape on channel 3 or 4 through the antenna cable. You can experience better visual and audio quality connecting the TV and VCR through the Video/Audio ports. The video port is distinguished by the color yellow, and the audio ports are distinguished by the white (left) and red colors (right).

External Input

External Input is connecting video devices such as a VCR, camcorder, DVD, etc. as a video source.

Satellite Broadcast

Satellite Broadcast transmits programs via satellite so that the broadcast is viable in all areas at a high visual and sound quality. It provides approximately 100 channels including public broadcast channels. To view satellite broadcast, you have to install an additional receiver.

Wired Broadcast

Satellite Broadcast refers to movie, entertainment and educational programs transmitted by the broadcasting station in a hotel or school.

Audio Multimix

Audio Multimix provides 2 languages for audio when broadcasting a foreign movie, drama, news, etc. You can select and listen to one of the supported languages or you can select and listen to both languages simultaneously.

Component Port (Green, Blue, Red)

The Component Port separately transmits the luminance signal and provides the best quality of all video connection types.

Cable Broadcast

Cable Broadcast transmits programs via cable instead of radio wave. To view a cable broadcast, you need to subscribe to your local cable broadcast service provider and install an additional receiver.

Tuner

RF signal processing , output IF signal.

DVD (Digital Versatile Disc)

DVD is a large capacity media that can save multimedia content such as video, game, audio applications, etc. using MPEG2 video compression technology on a CD-sized disc.

S-VIDEO IN Port

This is called super video. S-Video is a type of video signal which has the video luminance and color signals separated in order to provide a better visual quality.

VHF/UHF

VHF refers to TV channels 2 to 13, and UHF refers to TV channels 14 to 69.

Turbo sound

Turbo sound emphasizes the bass and treble frequencies to add fullness to the sound. Turbo Plus : It can strength the bass while enjoying music and movies. Voice : It can enhance the speech signal,such as leaving clear voice, when watching the News,Drama and Documentary etc.

14-2 Technical Terms

Product Specification

Samsung Electronics 2-1

2. Product Specification

2-1 Product Features

Block Specfication Core Parts Remark

CRT - 29" Slim-fit

RF Part - Analog Tuners

NTSC Tuner(Argemtma option)

Power

- Input Voltage: AC100-240V(Mexico : AC127V)

-Stand-By: Less than 2.6W

STR-X6750F

Video

-1H Comb Filter

-Digital Nr

-BLE

VCT4822_F1

Audio

- OutPut: 10W+10W

- Fuction: Melody on/off, Turbo Voice, Auto Volume, Pseudo Stereo

VCT4822_F1 TDA7297SA (10W+10W)

Cabinet Front and Back Cabinets Z30 Design Applied Material: HIPS

Other

- Development Level : Level 4

- ProtoType Model:CL29Z30PQTXXAX

- Receving(P/G) CH: VHF:2 ~ 13, UHF:14 ~ 69, CATV:1 - 125

■ Core Parts Functions

- VCT4822_F1: Sound Processor, Video Processor, Display and Deflection Processor Controller, OSD and Text Processing

- TDA7297SA : Sound Signal Amplify

- STR-X6750F: Power Supply HIC

- TDQ-6F/13F2S (Tuner): RF signal processing , output IF signal

- TECCIO4OSL32A(E) : 2Tuner-PIP Main tuner

- TMQH2-003A,2 Tuner-PIP Sub tuner

Product Specification

2-2 Samsung Electronics

2-2 Key Features

Model CL-29Z30MQ

Voltage AC100-240 V(Mexico : AC127V)

Frequency of Operation 50/60 Hz

Power Consumption 140 Watts

Dimensions (mm/inches)

36.7 x 15.9 x 22.3 inches 875 x 510 x 717 mm

Weight (Kg/ lbs) 41 kg / 92.6 Ibs

■ H/W Configuration

- 29" Slim fit CRT adopted

■ Picture

- System NTSC-M & Pal-M/N

- OSD: Half tone Menu

- DVD-input (Y,Pb,Pr) & S-VHS Option,

- AKB(Auto kinetic Bias)

- Comb Filter: 1H Comb filter

- Auto Peaking Control, Fine Tuneless, Group Delay Correction

■ Sound

- System: Stereo, Nicam

- Output:10W+10W

- AVL, Melody, Auto Stereo, Auto Mute, Equalizer

■ Feature

- Auto program, Sleep timer, Clock

- Caption

- Zoom, Previous channel, Blue Screen, Color Tone

■ In/Out Terminals

- Front: AV IN, S-VHS Input (Rear)

- Rear: 2 AV Input & Component video share 1 Component Input : 480i, RF 1 Input 1 AV Output

■ Remocon

- TM85

■ Power Supply

- 100V ~ 240V, (Mexico : 120V)

■ Power Comsumption

- Standy-by: Less than 2.6W

- Standard Power: 140W

Product Specification

Samsung Electronics 2-3

2-3 Specifications Analysis

Model CL29M6PQ CL-29Z30MQ

Chassis KS7A KS7D

Design

Picture

Screen Size 29" 29"

CRT FLAT SLIM-FIT

DNIe Jr.

■

Comb Filter 1H 1H

Velocity Modulation O X

Video Noise Reduction O O

Auto Kinetic Bias O O

Color Tone Control O O

Tilt Control O O

Picture Mode 4 Mode 4 Mode

Sound

MTS/SAP O O

Output Power(RMS) 15W*2 10W*2

Tweeter X X

BBE X X

Surround O O

Sound Mode 5 Mode 5 Mode

Graphic Equalizer O X

Sub-Woofer Speaker X X

Auto Volume Leveler O O

Melody On/Off O O

Turbo Sound O O

Convenience

PIP 2T 2T

Plug & Play O O

Zoom Mode O O

OSD Demo O O

OSD Language E/F/S/P E/F/S/P

Previous Channel O O

Closed Caption O O

On/Off Timer O O

Sleep Timer O O

Auto Power Off O O

Clock O O

Channel Scan X X

Self-diagnostic System X X

Remote Control TM76 TM85

Remote Surf O O

Channel Labelling O O

Blue Screen O O

Rack X X

Voltage Voltage 100~240 AC120V

Power

Consumption

On 145W 140W

Stand-by under 3W under 3W

Jacks

RF Input R1 R1

A/V Input S1/R2 S1/R2

Monitor Output R1 R1

S-VHS Input S1/R1 S1

Headphone X X

DVD Input O O

PC Input(VGA) X X

Product Specification

2-4 Samsung Electronics

2-4 Accessories

Accessories Item Item code Remark

Supplied Accessories

Remote Control

AAA Alkaline Battery (2)

AA59-00385A

4301-000103

Samsung Service

center

Owner's Instructions

Safety Guide Manual

AA68-03805A

AA68-03242F

Warranty Card

Registration Card

AA68-00682C BN68-00832C

Accessories that can be purchased

additionally

Video Cable /

Audio Cable

Internal shopping mall

S-Video Cable -

Component Cable -

Antenna Cable -

1. Make sure all protective devices are properly installed including non-metallic handles and compartment covers when installing or re-installing the chassis or chassis assemblies.

2. Make sure that no gaps exist between the cabinets for children to insert their fingers in to prevent children from receiving electric shocks. Gaps mentioned above include ventilation holes of a too great magnitude between the vaccum tube and the cabinet mask, and the improper installation of the rear cabinet.

Errors may occur when the resistance is below 1.0 ㏁ or over 5.2 ㏁.

In these cases, make sure that the device is repaired before sending it back to the customer.

3. Check for Electricity Leakage (Figure 1-1) Warning: Do not use an insulated transformer for checking the leakage. Use only those current leakage testers or mirroring systems that comply with ANSIC 101.1 and the Underwriter Laboratory's specifications (UL1410,

59.7).

Fig. 1-1 AC Leakage Test

4. A high voltage is maintained within the specified limits using safety parts, calibration and tolerances. When voltage exceeds the specified limits, check each special part.

5. Warning for Engineering Changes: Never make any changes or additions to the circuit design or the internal part for this product. Ex: Do not add any audio or video accessory connectors. This might cause physical damage. Furthermore, any changes or additions to the original design/engineering will invalidate the warranty.

6. Warning - Hot Chassis: Some TV chassis are directly connected to one end of the AC power cord for electrical reasons. Without insulated transformers, the product can only be repaired safely when the chassis is connected to the earthed end of the AC power source.

To make sure the AC power cord is properly connected, follow the instructions below. Use the voltmeter to measure the voltage between the chassis and the earthed ground. If the measurement is over 1.0V, unplug the AC power cord and change the polarity before reinserting it. Measure the voltage between the chassis and the ground again.

7. Some TV chassis are shipped with an additional secondary grounding system. The secondary system is adjacent to the AC power line. These two grounding systems are separated in the circuit using an unbreakable/unchangeable insulation material.

8. When any parts, material or wiring appear overheated or damaged, replace them with new regular ones immediately. When any damage or overheating is detected, correct this immediately and make a regular check of possible errors.

9. Check for the original shape of the lead, especially that of the antenna wiring, any sharp edges, the AC power and the high voltage power. Carefully check if the wiring is too tight, incorrectly placed or loose. Never change the space between the part and the printed circuit board. Check the AC power cord for possible damages. Keep the part or the lead away from any heat-emitting materials.

Precaution

Samsung Electronics 1-1

To avoid possible damages or electric shocks or exposure to radiation, follow the instructions below with regard to safety, installation, service and ESD.

1. Precaution

1-1 Safety Precautions

(READING SHOULD

DEVICE

UNDER

TEST

EXPOSED METAL

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

TEST ALL

SURFACES

LEAKAGE

CURRENT

TESTER

NOT BE ABOVE

0.5mA)

EARTH

GROUND

10. Safety Indication: Some electrical circuits or device related materials require special attention to their safety features, which cannot be viewed by the naked eye. If an original part is replaced with another irregular one, the safety or protective features will be lost even if the new one has a higher voltage or more watts.

Critical safety parts should be bracketed with ( ). Use only regular parts for replacements (in particular, flame resistance and dielectric strength specifications). Irregular parts or materials may cause electric shock or fire.

Precaution

1-2 Samsung Electronics

1. The service instructions are printed on the cabinet, and should be followed by any service personnel.

2. Make sure to unplug the AC power cord from the power source before starting any repairs. (a) Remove or re-install parts or assemblies. (b) Disconnect the electric plug or connector, if any. (c) Connect the test part in parallel with the electrolytic capacitor.

3. Some parts are placed at a higher position than the printed board. Insulated tubes or tapes are used for this purpose. The internal wiring is clamped using buckles to avoid contact with heat emitting parts. These parts are installed back to their original position.

4. After the repair, make sure to check if the screws, parts or cables are properly installed. Make sure no damage is caused to the repaired part and its surroundings.

5. Check for insulation between the blade of the AC plug and that of any conductive materials (i.e. the metal panel, input terminal, earphone jack, etc).

6. Insulation Check Process: Unplug the power cord from the AC source and turn the switch on. Connect the insulating resistance meter (500v) to the AC plug blade.

The insulating resistance between the blade of the AC plug and that of the conductive material should be more

than 1 ㏁.

7. Any B+ interlock should not be damaged. If the metal heat sink is not properly installed, no connection to the AC power should be made.

8. Make sure the grounding lead of the tester is connected to the chassis ground before connecting to the positive lead. The ground lead of the tester should be removed last.

9. Beware of risks of any current leakage coming into contact with the high-capacity capacitor.

10. The sharp edges of the metal material may cause physical damage, so ensure wearing protective gloves during the repair.

Precaution

Samsung Electronics 1-3

Warning 1: First carefully read the "Safety Instruction" in this service manual.

When there is a conflict between the service and the safety instructions, follow the safety instruction at all times.

Warning 2: Any electrolytic capacitor with the wrong polarity will explode.

1-2 Servicing Precautions

1-3 Static Electricity Precautions

1. Some semi-conductive ("solid state") devices are vulnerable to static electricity. These devices are known as ESD. ESD includes the integrated circuit and the field effect transistor. To avoid any materials damage from electrostatic shock, follow the instructions described below.

2. Remove any static electricity from your body by connecting the earth ground before handling any semi-conductive parts or ass'ys. Alternatively, wear a dischargeable wrist-belt. (Make sure to remove any static electricity before connecting the power source - this is a safety instruction for avoiding electric shock)

3. Remove the ESD ass'y and place it on a conductive surface such as aluminum foil to prevent accumulating static electricity.

4. Do not use any Freon-based chemicals. Such chemicals will generate static electricity that causes damage to the ESD.

5. Use only grounded-tip irons for soldering purposes.

6. Use only anti-static solder removal devices. Most solder removal devices do not support an anti-static feature. A solder removal device without an anti-static feature can store enough static electricity to cause damage to the ESD.

7. Do not remove the ESD from the protective box until the replacement is ready. Most ESD replacements are covered with lead, which will cause a short to the entire unit due to the conductive foam, aluminum foil or other conductive materials.

8. Remove the protective material from the ESD replacement lead immediately after connecting it to the chassis or circuit ass'y.

9. Take extreme caution in handling any uncovered ESD replacements. Actions such as brushing clothes or lifting your leg from the carpet floor can generate enough static electricity to damage the ESD.

Precaution

1-4 Samsung Electronics

CAUTION

These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.

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