SAMSUNG CL29K40MQ2XXAP Service Manual

COLOR TELEVISION RECEIVER

Chassis : K16A(N)_Ray Model : CL29K40MQ2XXAP

COLOR TELEVISION RECEIVER FEATURES

■■

Turbo Plus

■

DNIe jr.

■■

Low Stand-By Power Wattage

■

SOUND Equalizer

SERVICE

Manual

CL-29K40MQ

Wiring Diagram

Samsung Electronics 8-1

8. Wiring Diagram

8-1 Overall Wiring

AV PCB

CRT SIGNAL

& POWER

PIP MODULE

SPEAKER

CONTROL PCB

POWERSWITCH

Wiring Diagram

8-2 Samsung Electronics

8-2 Pin Connection

CN901

Pin NO. Pin Nam e

1STD-LED

2TIME-LED

3GND

4VCC

5I.R

CNP01

Pin NO. Pin Nam e

1B+8V

2B+5V

3GND

4SCL

5SDA

6GND

7H-SYNC

8V-SYNC

9PIP-F/B

10 PIP- B

11 PIP- G

12 PIP- R

CN9 02

Pin NO. Pin Nam e

1KEY-IN2

2KEY-IN1

3GND

4KEY-IN3

FN01

PinNO. PinName

CNP02

Pin NO. Pin Nam e

1OSD-R

2OSD-G

3OSD-B

4OSD-F/B

6GND

8N.C

SU b-

CVBS

PIP-

CVBS

CN501A

Pin NO. Pin Nam e

1GND

2N.C

3GND

4HEATER

5N.C

6B+200V

1TILTOUT

2TILTOUT

3GND

4GND

CN5 03

Pin NO. Pin Nam e

1B-OUT

2G-OUT

3R-OUT

4GND

5SENSE

6GND

7N.C

8GND

9GND

10 N.C

11 GND

12 HEAT ER

13 N.C

14 B+ 200V

PIP MODULE

CNP01 CNP02

CN9 00

Pin NO. Pin Nam e

1SCL

2GND

3B+3.3V

4SDA

CN6 01

Pin Nam e

NO.

1R+OUT

2R-OUT

3L+OUT

4L-OUT

TU02S

CN502

Pin NO. Pin N ame

1B-OUT

2G-OUT

3R-OUT

4GND

5SENSE

6GND

7N.C

8GND

CN701

Pin NO. Pin N ame

1AV2-R-IN

2AV2-L-IN

3AV2-L-OUT

4AV2-R-OUT

5GND

6 AV2-V-IN

7GND

8 AV2-V-OUT

CN7 02

PinNO. PinName

1C-OUT

2GND

3Y-OUT

4GND

5C-IN

6GND

7Y-IN

TU01S

Troubleshooting

Samsung Electronics 6-1

6. Troubleshooting

6-1 Checkpoints by Error Mode

■ Power LED: Check that the LED works when turning the Master 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 a 230V wall outlet.

2) Check that the Master Switch has been pressed.

3) Check that the transmitter is turned on.

4) Check that transmitter device selection is set to TV.

5) Check that the signal cable is properly connected.

6) Check that channel setting has been set.

Troubleshooting

6-2 Samsung Electronics

6-1-1 Flow Chart for Malfunction

dnuoS oN & erutciP oN

eht kcehC

sserpmi egatlov

retsam eht kcehC

no hc

tiw

eht kceh

”S108PF“ ESUF

ht kcehC

ehC

eht kc

#”S108D“

seY

1# S108

seY

trap srehto eht kcehC

F0576W

egnah

”S

108PF“

egnahC

”S108

D“

”S108CI“ egnahC

taelpmoC

rewoP oN riapeR

dnuos on & erutcip oN

)KO rewop ts1(

ht kcehC

“

kcehc dn

D“ eht egnahC

805A”

805A)D

(

enil V521+ e

seY

nepo )805AD(”118D

eht kc

ehC

seY

3# niP +B 444T

kcehc dna nepO

seY

”1

04Q“

kcehC

IC601

”104Q“ eht egnahC

srehto eht kcehC

il +B

enil V521+ e

trap srehto

IC901

IC201S

TU01S

taelpmo

p on riaper

rewo

IC802 IC803

IC804

LED

Power cord

IC801S

QE01

Q401S

T401S

IC301S

Troubleshooting

Samsung Electronics 6-3

6-2 Troubleshooting Procedures by Error Modes

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

6-2-2 Troubleshooting by the Checksum

■ Diagnosis of trouble by the checksum is neither reliable nor convenient.

You can only use the checksume of the current direct-view TV to determine whether the software is corrupted or not. The Checksum value is determined according to the version of the software loaded on the set. Therefore, you can determine whether the software has been properly downloaded, if you know the correct checksum for that version of the software.

You can check the checksum according in the following order. Factory Mode → Checksum → Right Button → Calculate Checksum → Output Checksum (e.g. 3036)

■ Checksum Examples

T-TR2PEU-1000 : checksum = 8036 T-TR2PEU-1010 : checksum = B612

Power Description

○

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

●

This happens when the power cord is connected and the power switch is pressed. If you cannot set the power switch on by pressing it, check the power switch Ass'y.

○→◑→●

If you press the power switch of the transmitter 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 Control Assy and the Main Board.

● : Light is On ◑ : Light is Blinking ○ : Light is Off

Troubleshooting

6-4 Samsung Electronics

6-3 Troubleshooting Procedures by ASS'Y

6-3-1 No Power (1st Power)

6-3-2 No Picture(2nd Power)

No Picture & No Sound

Check the AC

voltage impress

Check the master

switch on

Check the

FUSE “FP801S”

Yes

Change “FP801S”

Yes

Compleat

Repair No Power

Yes

No picture

(1st power OK)

Check the +125V line

“D811”(D811A) open

and check

Yes

Check the

“D801S” #1

Change “D801S”

T444 B+ Pin #3

Open and check

Yes

Check the IC801S #1

W6750F

Change “IC801S”

Yes

Check the others

B+ line

Check IC501 Pin#6

Check the others part

Yes

Change IC201

Change the “D811”

(D811A)

Compleat

repair no picture

Check the “Q401”

Change the “Q401”

Yes

Change IC501

Troubleshooting

Samsung Electronics 6-5

6-3-3 No Sound

No sound

(1st power OK)

Check the +14V line

Check FD801S

(FD802S)

Change FD801S

(FD802S)

Compleat

repair no sound

Yes

Check D807

Check IC601 Pin#6

Change IC601”

IC601

Yes

Check IC201 Pin#58,59

Yes

IC901

IC201S

Yes

Change IC201

TU01S

IC802

IC803

Q401S

IC804

LED

T401S

Power cord

IC801S

QE01

IC301S

6-6 Samsung Electronics

MEMO

10. Schematic Diagram

Samsung Electronics

Schematic Diagram

10-1

10-1 Power & Deflection Block

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

TP01

TP02

TP03

TP08

Power

Signal

TP02

TP01

TP08

TP03

Schematic Diagram

10-2 Samsung Electronics

10-2 IF & UOC(Chroma_Micom) Block

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

TP04

TP05

TP06

TP07

Power

Signal

TP07

TP04

TP06

TP05

Samsung Electronics

Schematic Diagram

10-3

10-3 PIP & CRT Block

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

TP09

TP10

TP11

Power

Signal

Schematic Diagram

10-4 Samsung Electronics

10-4 AV & Sound Block

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

Reference Information

Samsung Electronics 14-1

14. Reference Information

14-1 Other issues related to other products

Problem Descriptions

A fixed screen can cause permanent damage to the TV Braun tube.

Braun, PDP and LCD TVs can all be damaged. When a still image is displayed in a sequence, this can leave stains or after-images due to the characteristics of the panel. However, the DLP TV has the advantage that no stains or after-images are left on the screen. The DLP TV has mirror pixels on the DMD panel that project the beam onto the screen, in which the mirror is a digital representation of 0s and 1s, leaving no trace of light. The mirror returns to a blank state so that no stains or after-images are left.

■ SD/HD broadcasts and the TV's display capability are related

1. A digital broadcast should be transmitted in wide screen (an aspect ratio of 16:9) HD. If the broadcasting station converts a conventional program created in normal screen (aspect ratio of 4:3) into a digital signal and broadcasts the signal, the left and right of the picture will not be displayed. This symptom also appears in other manufacturer's TV's. The three appliance companies are trying to resolve the problem through the Ministry of Information and Communication.

＊ When watching an SD (normal) broadcast through a Digital (Wide) TV (480P normal broadcast) ＊ When watching an SD (normal) broadcast through a Digital Ready (Wide) TV (Using a set-top-box) ＊ When watching an analog (normal) broadcast through a wide TV

(When watching a broadcast after changing the aspect ratio of the TV from 16:9 (wide screen) to 4:3)

2. When watching a DVD title or video tape in wide screen (21:9) through a wide (16:9) TV, watching video from a computer or game console by selecting the aspect ratio to 4:3, or watching video from a DVD, VCR, computer or game console through a wide TV by selecting the aspect ratio to normal (4:3) or wide (21:9), the left and right, or top and bottom of the picture will not be displayed. This symptom appears in other manufacturer's TV's. The three appliance companies are trying to resolve the problem through the Ministry of Information and Communication.

■ Changing the Order of the Picture Size for DTV 1080i/720p Sources

■ Restrictions

1. When you want to change the picture size in PIP 'ON', you must turn the PIP off before changing the size.

However, you can change the main picture size even in PIP ON for products with no restrictions.

2. When the picture size is not Normal (4:3 for 4:3 display devices, 16:9 for 16:9 display devices) and you turn PIP on, the picture

size is changed to Normal. However, you can turn PIP on without changing the picture size for products with no restrictions.

4. The picture size can be changed even in the blue screen.

However, the picture size should be controlled by the product specifications if the change is impossible due to hardware restrictions.

4:3(Normal) Zoom

Reference Information

14-2 Samsung Electronics

Digital Broadcast

Digital Broadcast is a television broadcasting signal digitized and transmitted according to the United States' terrestrial digital broadcast standard, or ATSC.

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.

Analog Broadcast

Analog Broadcast is a television broadcasting signal transmitted according to the NTSC standard.

ANTENNA IN Port

A port to connect the TV aerial using a coaxial cable. It is generally used to watch public broadcast programs.

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, DTV receiver, 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

A device that enables selecting a specific frequency for a channel on a TV or radio.

Anynet

Anynet is an AV network system that enables the easy-to-use AV interface for users by controlling connected AV devices through the Anynet menu when AV devices of Samsung Electronics are connected.

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.

14-2 Technical Terms

Product Specification

Samsung Electronics 2-1

2. Product Specification

2-1 Product Features

Block Specfication Core Parts Remark

CRT 29" FLAT AK CRT GREEN CRT

RF Part 1TUNER F/S TUNER TDQ-6F/13F2S

Power

WORLD WIDE INPUT VOLTAGE RANGE STD-BY : 5W UNDER

STR-W6750F

Video

- MULTI SYSTEM(NT/PAL)

- 1H Comb Filter

TDA12005PQ, TDA12015PQ

Audio

- Output : 5W/10W/15W X2

- BTSC/SAP STEREO : PSEUDO STEREO, TURBO PLUS

TDA12005PQ, TDA12015PQ, TDA7297SA

Cabinet - 29" CABINET

Other

- BASIC MODEL : CL29M21FQ2XXAX

- UOC3 with a built-in MSP

- TURBO → TURBO PLUS

■ Core Parts Functions

- TDA12005PQ : Video/Sound Processing and MICOM (NTSC)

- TDA12015PQ : Tri-noma

- STR-W6750F : SMPS Power STR

- TDA7297SA(or 7266) : 5W ~ 15W Sound Output BTL AMP

- 24C16 : 16K EEPROM

- LA78040 : Vertical Deflection AMP

- C5936 : H-OUT S/W TR

- TDA-6F/13F2S : F/S PAL Tuner

- TDA6108AJF : R/G/B Drive AMP IC

Product Specification

2-2 Samsung Electronics

2-2 Key Features

Model CL-29K40MQ

Voltage AC100-240V

Frequency of Operation 50/60 Hz

Power Consumption 110 Watts

Dimensions (mm/inches)

766 X 558 X 586/

30.16 X 21.97 X 23.07

Weight (Kg/ lbs) 41/90.39

■ Hardware Configuration

- 1 Chip : UOC3 TDA12005PQ(CHROMA, IF+Deflection, MICOM, MSP)

- Tuner : TDA-6F/13F2S

- SOUND AMP : TDA7297SA(ZIP, 15P, -, DUAL, 32dB, PLASTIC, 20V, 30W)

- SMPS Controller : STR-W6750F(6P, TO-3P-F7L)

- Vertical AMP : LA78045(TO220, 7P, 15V)

- Flyback Trans : FOK14B001(11P, 27KV)

- CRT : A51QDX993X(A) (AK, 1H Single Focus)

■ Software Configuration

- MCU : 80C51-controller core

- Data Capture for US Closed Caption

- 0.4883s machine cycle

■ Picture

- Enhance : DNIe Jr.(Digital Natural Image Engine)

- System : NTSC3.58

- Interlaced(60Hz)

- AKB(Auto Kinetic Bais)

- Comb Filter : 1H Comb Filter

- 4:3/Zoom

■ Sound

- BTSC/SAP-STEREO

- Output : 5/10/15W X 2CH

- Auto Stereo, Sound Equalizer, Auto Mute, Auto Volume Limit, PSEUDO STEREO, TURBO PLUS

■ Feature

- Composite (RCA A/V, DVD), S-Video(Y/C)

- Picture Size : Zoom/4:3

- Auto Serch

- Sleep Timer : 180 Min

- Clock Setting

- Blue Screen, Melody On-Off, Picture Mode Select

■ In/Out Terminals

- Rear : 2RCA/DVD/S-VHS

- Front or Side A/V Input(Side A/V Preferability)

■ Remocon

- Universal Interface TM75

■ Power Consumption : 105W

Product Specification

Samsung Electronics 2-3

2-3 Specifications Analysis

Model CL29M21PQ CL-29K40MQ

Chassis KS7A K16A

Design

Picture

Screen Size 29" 29"

Pure Flat CRT

○ ○

DNIe Jr.

○ ○

Comb Filter 1H 1H

Velocity Modulation

× ×

Video Noise Reduction

○ ○

Auto Kinetic Bias

○ ○

Color Tone Control

○ ○

Tilt Control

× ×

Picture Mode 4 Mode 4 Mode

Sound

MTS/SAP

○ ○

Output Power(RMS) 15W x 2 15W x 2

Tweeter

× ×

BBE

× ×

Surround Surround Surround

Sound Mode 5 Mode 5 Mode

Graphic Equalizer

× ×

Sub-Woofer Speaker

× ×

Auto Volume Leveler

○ ○

Melody On/Off

○ ○

Turbo Sound

○ ○

Convenience

PIP 2T (Optional)

Plug & Play

○ ○

Zoom Mode

○ ○

OSD Demo

○ ○

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

Previous Channel

○ ○

Closed Caption

○ ○

On/Off Timer

○ ○

Sleep Timer

○ ○

Auto Power Off

○ ○

Clock

○ ○

Channel Scan

× ×

Self-diagnostic System

○ ○

Remote Control TM76 TM75

Remote Surf

○ ○

Channel Labelling

○ ○

Blue Screen

○ ○

Rack

× ×

Voltage

AC100-240V

AC120V (Mexico)

AC100-240V

Stand-by under 3W under 5W

Jacks

RF Input R1 R1

A/V Input S1/R2 S1/R2

Monitor Output R1 R1

S-VHS Input R1 R1

Headphone S1 S1

DVD Input

○ ○

PC Input(VGA)

× ×

Product Specification

2-4 Samsung Electronics

2-4 Accessories

Accessories Item Item code Remark

Supplied Accessories

Remote Control

AAA Alkaline Battery (2)

AA59-00385A

4301-000121

Samsung Service center

Owner's Instructions AA68-03858A

Warranty Card AA68-03727A

Accessories that can be purchased

additionally

Video Cable /

Audio Cable

Internal shopping mallAntenna Cable -

Component 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.

Precaution

Samsung Electronics 1-5

1-4 Installation Precautions

1. For safety reasons, more than two people are required for carrying the product.

2. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock.

3. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.

4. Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed to moisture. Otherwise, it may cause a fire or electric shock.

5. Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product. Also check the antenna cable or the external connectors if they are fully unplugged. Damage to the cord may cause fire or electric shock.

6. Keep the antenna far away from any high-voltage cables and install it firmly. Contact with the high-voltage cable or the antenna falling over may cause fire or electric shock.

7. Check the basics of the screen test.

- Image position/size, Tilt adjustment

1-6 Samsung Electronics

MEMO

PCB Diagram

Samsung Electronics 9-1

9. PCB Diagram

9-1 Main Board

9-1-1 Assy Main Board

■ The Board that Controls Various Signals & Power for Product Operations

9-1-2 Names & Roles of Key Parts

* GT801 : A3 pin port connected to the Master Ass'y, which handles Master Power On/Off. * CN601 : A4 pin port connected to the Speaker. * CN902 : A4 pin port connected to the Control Ass'y, which delivers the necessary signal to KEY-IN1, KEY-IN2 Control. * CN901 : A5 pin port connected to the Control Ass'y, which delivers the necessary signal to the remote control and the Led

control. * CN602 : A5 pin port connected to AV Ass'y. * CN701 : A8 pin port connected to the AV Ass'y, which receives AV2 external input. * CN702 : A7 pin port connected to the AV Ass'y, which receives S-VHS external input. * CN501 : A8 pin port connected to the CRT Ass'y which outputs the R/G/B signal to the CRT Ass'y for display.

In addition, this port outputs the necessary TILT, VM, and Power signals to the CRT Drive. * CN502 : A6 pin port connected to the CRT Ass'y. Through this port, the power from the Deflection Block is supplied to drive

the CRT AMP. * CN503 : A14 pin port connected to the CRT Ass'y. * FN1 : A4 pin port connected to the Tilt Coil.

CN601

CN503

CN902

FN1

CN901

GT801

CN900

CN501A

CN702

CN701

CN502

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