Samsung tsl3099whfx service manual

COLOR TELEVISION RECEIVER

Chassis : K54A(REV.1) Model : TSL3099WHFXXAA

COLOR TELEVISION RECEIVER CONTENTS

Precautions

Reference Information

Specifications

Alignment and Adjustments

Troubleshooting

Exploded Views and Parts List

Electrical Parts List

Block Diagrams

Schematic Diagrams

ELECTRONICS

Printed in Korea

AA68-02134A

1. Precautions

1-1 Safety Precautions

1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.

2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.

3. Make sure that there are no cabinet openings through which people—particularly children—might insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers.

If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer.

4. Leakage Current Hot Check (Figure 1-1): Warning: Do not use an isolation transformer during this test. Use a leakagecurrent tester or a metering system that complies with American National Standards Institute (ANIS C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

5. With the unit completely reassembled, plug the AC line cord directly into the power outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the powerplug prongs in the AC outlet and repeat the test.

Fig. 1-1 AC Leakage Test

6. Antenna Cold Check: With the unit’s AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector.

7. X-ray Limits: The picture tube is especially designed to prohibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original. Carefully reinstall the picture tube shields and mounting hardware; these also provide X-ray protection.

8. High Voltage Limits: High voltage must be measured each time servicing is done on the B+, horizontal deflection or high voltage circuits. Correct operation of the X-ray protection circuits must be reconfirmed whenever they are serviced.

(X-ray protection circuits also may be called

“horizontal disable” or “hold-down”.)

Heed the high voltage limits. These include the X–ray Protection Specifications Label, and the Product Safety and X-ray Warning Note on the service data schematic.

Precautions

Samsung Electronics 1-1

LEAKAGE CURRENT

TESTER

DEVICE UNDER

TEST

TEST ALL

EXPOSED METAL

SURFACES

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED)

EARTH

GROUND

(READING SHOULD

NOT BE ABOVE

0.5mA)

Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays.

1-1 Safety Precautions (Continued)

9. High voltage is maintained within specified

limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

10. Design Alteration Warning:

Never alter or add to the mechanical or electrical design of this unit. Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturer’s warranty.

11. Hot Chassis Warning:

Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord. If an isolation transformer is not used, these units may be safely serviced only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC source.

To confirm that the AC power plug is inserted correctly, do the following: Using an AC voltmeter, measure the voltage between the chassis and a known earth ground. If the reading is greater than 1.0V, remove the AC power plug, reverse its polarity and reinsert. Re-measure the voltage between the chassis and ground.

12. Some TV chassis are designed to operate with

85 volts AC between chassis and ground, regardless of the AC plug polarity. These units can be safely serviced only if an isolation transformer inserted between the receiver and the power source.

13. Some TV chassis have a secondary ground

system in addition to the main chassis ground. This secondary ground system is not isolated from the AC power line. The two ground systems are electrically separated by insulating material that must not be defeated or altered.

14. Components, parts and wiring that appear to

have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications. Always determine the cause of damage or overheating, and correct any potential hazards.

15. Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.

16. Picture Tube Implosion Warning: The picture tube in this receiver employs “integral implosion” protection. To ensure continued implosion protection, make sure that the replacement picture tube is the same as the original.

17. Do not remove, install or handle the picture tube without first putting on shatterproof goggles equipped with side shields. Never handle the picture tube by its neck. Some “in-line” picture tubes are equipped with a permanently attached deflection yoke; do not try to remove such “permanently attached” yokes from the picture tube.

18. Product Safety Notice: Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement component differs from the original—even if the replacement is rated for higher voltage, wattage, etc.

Components that are critical for safety are indicated in the circuit diagram by shading, ( ) or ( ). Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

Precautions

1-2 Samsung Electronics

1-2 Servicing Precautions

1. Servicing precautions are printed on the cabinet. Follow them.

2. Always unplug the unit’s AC power cord from the AC power source before attempting to: (a) Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.

3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

4. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged.

5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).

6. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

7. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

8. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last.

Precautions

Samsung Electronics 1-3

Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between

the servicing and safety precautions, always follow the safety precautions.

Warning2: An electrolytic capacitor installed with the wrong polarity might explode.

1. Some semiconductor (“solid state”) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.

2. Immediately before handling any semicon ductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying power— this is an electric shock precaution.)

3. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of electrostatic charge.

4. Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDs.

5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.

6. Use only an anti-static solder removal device. Many solder removal devices are not rated as “anti-static”; these can accumulate sufficient electrical charge to damage ESDs.

7. Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

8. Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

9. Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD.

Precautions

1-4 Samsung Electronics

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

Reference Information

Samsung Electronics 2-1

2. Reference Information

2-1 Tables of Abbreviations and Acronyms

A Ah Å dB dBm

°C °F °K F G GHz g H Hz h ips kWh kg kHz kΩ km km/h kV kVA kW I MHz

Ampere Ampere-hour Angstrom Decibel Decibel Referenced to One Milliwatt Degree Celsius Degree Fahrenheit degree Kelvin Farad Gauss Gigahertz Gram Henry Hertz Hour Inches Per Second Kilowatt-hour Kilogram Kilohertz Kilohm Kilometer Kilometer Per Hour Kilovolt Kilovolt-ampere Kilowatt Liter Megahertz

MV MW MΩ m µA µF µH µm µs µW mA mg mH mI mm ms mV nF

Ω

pF Ib rpm rps s V VA W Wh

Megavolt Megawatt Megohm Meter Microampere Microfarad Microhenry Micrometer Microsecond Microwatt Milliampere Milligram Millihenry Milliliter Millimeter Millisecond Millivolt Nanofarad Ohm Picofarad Pound Revolutions Per Minute Revolutions Per Second Second (Time) Volt Volt-ampere Watt Watt-hour

Table 2-1 Abbreviations

Reference Information

2-2 Samsung Electronics

Table 2-2 Table of Acronyms

ABL AC ACC AF AFC AFT AGC AM ANSI APC APC A/V AVC BAL BPF B-Y CATV CB CCD CCTV Ch CRT CW DC DVM EIA ESD ESD FBP FBT FF FM FS GND G-Y H HF HI-FI IC IC IF

Automatic Brightness Limiter Alternating Current Automatic Chroma Control Audio Frequency Automatic Frequency Control Automatic Fine Tuning Automatic Gain Control Amplitude Modulation American National Standards Institute Automatic Phase Control Automatic Picture Control Audio-Video Automatic Volume Control Balance Bandpass Filter Blue-Y Community Antenna Television (Cable TV) Citizens Band Charge Coupled Device Closed Circuit Television Channel Cathode Ray Tube Continuous Wave Direct Current Digital Volt Meter Electronics Industries Association Electrostatic Discharge Electrostatically Sensitive Device Feedback Pulse Flyback Transformer Flip-Flop Frequency Modulation Fail Safe Ground Green-Y High High-Frequency High Fidelity Inductance-Capacitance Integrated Circuit Intermediate Frequency

I/O L L LED LF MOSFET MTS NAB NEC NTSC OSD PCB PLL PWM QIF R RC RF R-Y SAP SAW SIF SMPS S/N SW TP TTL TV UHF UL UV VCD VCO VCXO VHF VIF VR VTR VTVM TR

Input/output Left Low Light Emitting Diode Low Frequency Metal-Oxide-Semiconductor-Field-Effect-Tr Multi-channel Television Sound National Association of Broadcasters National Electric Code National Television Systems Committee On Screen Display Printed Circuit Board Phase-Locked Loop Pulse Width Modulation Quadrature Intermediate Frequency Right Resistor & Capacitor Radio Frequency Red-Y Second Audio Program Surface Acoustic Wave(Filter) Sound Intermediate Frequency Switching Mode Power Supply Signal/Noise Switch Test Point Transistor Transistor Logic Television Ultra High Frequency Underwriters Laboratories Ultraviolet Variable-Capacitance Diode Voltage Controlled Oscillator Voltage Controlled Crystal Oscillator Very High Frequency Video Intermediate Frequency Variable Resistor Video Tape Recorder Vacuum Tube Voltmeter Transistor

Reference Information

Samsung Electronics 2-3

2-2 Explanation of Landing Compensation Circuit

Landing in the display media using CRT means operation that beam occurred at the electronic gun passes through a constant hole and arrives to the light emitting object. The more accurate this is, the more even unified brightness of the whole of screen is uniform. However, landing becomes loose since there is deviation of manufacturing process in the CRT itself and various inside/outside factors.

- Effect of earth magnetic field

There is a magnetic line of force proceeding from South to North in the earth, called as earth magnetic field.

CRT emits light by electron from an electronic gun and direction of this electron becomes reverse direction of current. Force (F) applies to electron moved by current (I) of the earth magnetic field and the CPT. Electronic beam fails to arrive a proper position due to this force, which must constantly arrive at the fixed position of a shadow mask.

2-2-1 Definition

- Effect of ambient temperature

Beam flying to a constant position fails to arrive to the light emitting object by distortion of a mask since thermal expansion shrinkage of the shadow mask made of metal is different from the side where the light emitting object is attached depending on temperature.

- Effect of operation time and beam force

Immediately after TV turns on, temperature inside of the CRT rapidly increases by electronic beam and thereby thermal expansion proceeds in the shadow mask. This proceeds for about 2 hours and accordingly landing varies. Such a level of change differs depending on the strength of beam shone on the screen together with time. The stronger strength of the beam is, namely the brighter the screen is, the severer change of landing is.

The CRT used in the ZEUS is OMEGA CRT of a complete flat32” HD-class with an injection degree of maximum 120’ independently developed and produced by the SDI. It was manufactured in the most minimum width in the world in comparison with the same size to reduce depth of the set.

Such configuration gives a bad effect on the landing surface and thus landing at the 4 point within the CRT becomes distorted even by a small ambient effect and purity error (change of color purity: other color) occurs.

Reference Information

2-4 Samsung Electronics

The following tables show direction of Landing distortion for factors effecting on Landing.

2-2-2 Principle of Operation

The earth magnetic field sensor and the temperature sensor are attached for measuring direction and strength of the current earth magnetic field and temperature of set. Since effect on the above table must be compensated, force in the reverse direction must be made.

The following figure shows that coil for landing compensation and coil for TILT compensation are attached on the rear side of CRT to compensate for it. 4 round coils (coil for landing compensation) is used to compensate for error in the corner where landing error mostly occurs. The TILT coil adjusts degree of the whole of screen.

** The above tables show direction of actual effect and a reverse direction of it for Landing Data

(direction of microscope). **

Compensation is currently not done for TIME and beam in the landing compensation circuit and circuit improved in the following version will operate

CRT Direction

Direction of

distorted

landing

EARTH WEST SOUTH NORTH

CRT Direction

Direction of

distorted

landing

Low Temperature High Temperature

TILT COMPENSATION COIL

LANDING

COMPENSATION COIL

COIL VIEWED BEHIND CRT

Reference Information

Samsung Electronics 2-5

- Explanation of Operation

Operation of the landing compensation circuit is controlled by a sub-micom within module. Operation of the sub-micom for the actual landing compensation is perceived and controlled. It receives values of the earth magnetic field sensor (SEN01) and temperature sensor (DM01) via the A/D port of the sub-micom and then perceives the current status and outputs compensation value in the PWM form. Direct driving of the landing compensation coil is done at the LA6510 power drive OP AMP. Standard operation voltage of the AMP is made by divided voltage of R028, R029 and applied to the (+) 1N of the OP AMP. The PWM type of control data that is output from the MICOM is smoothed by the RC integrated circuit and becomes analog voltage with a constant level. It is applied to the reverse amplitude circuit composed of a power drive OP AMP via a TR and resistance. In this case, amplitude level is determined by the whole output impedance and feedback resistance of circuits connected to the (-) 1N terminal of the OP AMP. The LA6510 VSENSE PORT is used for limiting current and can limit the max current value using resistance value between VOUT terminals. The output flows through the LC coil and creates magnetic field. Position of electronic beam is compensated by the magnetic field. DC R (voltage at both ends of the LC coil measured by DVM as direct current resistance component) of the LC coil is about 100 ohm.

Details of explanation are deleted since operation of the tilt coil operates even in general TV.

- Inspection of Operation

Operation inspection after set repair is as follows:

1) Is the output terminal (red, gray, blue, black) of coil at the aging mode within 9 +/- 300mV?

2) Does other color occur when removing the PCB Front Connector(CN905A) from the Main Chassis?

3) Does other color occur when touching magnetic object near the earth magnetic field Sensor Module?

Where all answers for the above questions are Yes, they show that the Landing compensation circuit properly operates for the set.

2-2-3 Operation of Circuit

Two matters are related each other in the factory mode.

Factory mode -> TL, BL, TR and BR value are value of the area that user (service man) can vary. It is better not use these values unless purity error occurs (where, TL, BL, TR, BR represents TOP LEFT, BOTTOM LEFT, TOP RIGHT and BOTTOM LIGHT, respectively).

Factory mode -> There are TL, BL, TR, BR and SENCE LRR types in the ITC. They must not be changed. There is information about CRT and the circuit part for compensating it. However, in replacing EEPROM or main chassis, change of it is needed but the value of sense REF must not be changed.

(The sense REF is used to compensate for sensor unique omission and is line adjustment value that reads center value of sensor in the 0-earth magnetic field and stores it at the EEPROM. Since the 0-earth magnetic field cannot be made in the field, this item shall not be changed. If changing it and thus purity error occurs, the EEPROM must be replaced according to the following cautions)

2-2-4. Related OSD Matters

Reference Information

2-6 Samsung Electronics

Check item prior to repair

1) Is the +- output terminal (Red, Gray, Blue, Black) of a coil in the Aging Mode within 0 +/- 300mV?

2) Does other color occur when removing the PCB front connector from the main chassis?

3) Does other color occur when touching approaching magnetic object around the earth magnetic field Sensor Module?

If all answers for above questions is Yes, it means landing compensation circuits properly operates for the set.

1) Cautions in replacement of parts and E2PROM in earth magnetic field

You should replace an E2PROM within the main chassis and the main chassis in the following orders if necessary:

Where set operation is possible

a) Memorize values of TL, BL, TR and BR from the Factory Mode -> TIC. Sense REF values should not be

changed at any case (If pressing + - key, current values of the earth magnetic field becomes standard

value and emergent operation is done by it). b) Replace parts. c) Change it into TL, BL, TR and BR memorized from the Factory Mode -> TIC. Sense REF values should

not be changed at any case (In this case, initial value is 115, 125). d) Inspect operation status. e) If there is no abnormality in the operation inspection but other color occurs, change and adjust

four value(TR, BL, TR, BR) from the Factory Mode ->User so that there is no purity error.

Where set operation is not possible

a) Replace parts. b) Change should not be done at any case in the Factory Mode -> TIC mode.

(In this case, initial value is 115, 125). c) Inspect operation status. d) If there is no abnormality in the operation inspection but other color occurs depending on ambient

conditions, change and adjust 4 values from the Factory Mode ‡User so that there is no purity error.

2-2-5 Cautions in troubleshooting

Reference Information

Samsung Electronics 2-7

2) Cautions in De-Gaussing

1. ADG (Auto Degaussing)

- There is no problem since set itself operates in the Degaussing operation of set itself under the Purity Off Mode. However, the set normally operates when performing Power On after Off for 30 minutes after removing power.

2. HDG (Hand Degaussing)

- If desiring to operate the compulsory Degaussing mode, you should set “Aging Mode” for operation.

3. AGING MODE

- A strong magnetic field occurred in the HDE-GAUSSING affects on sensor in the earth magnetic field

and as a result, a strong magnetic field occurs from the LC coil. It is not good for sense operation and DE-GAUSSING of the earth magnetic field. Be sure to perform semsing and DE-GAUSSING magnetic field in Aging Mode, especially whem adjusting user values.

Reference Information

2-8 Samsung Electronics

2-2 IC Line Up

Block Des-Loc Part-Number IC Name Description

MAIN

IC601

IC701

IC702

IC703

TU01

TUP01

IC905

ICH01

IC602

ICD603

IC603

IC804

IC805

IC802

1204-001594

1001-001073

1001-001113

1002-001193

AA40-00020A

AA40-00032A

1103-001171

1204-001454

1201-000407

1201-001385

1203-000203

1203-000293

MSP3440G-B6

TEA6415C

TEA6422

PCF8591P

TCLN318PA09A(S)

TCPN3081PC09A(S)

24L161

TDA7449L

TDA7050

TDA7269A

SI3050

KA7808

IC-SOUND PROCESSOR

IC-VIDEO SWITCH

IC-AUDIO SWITCH

IC-A/D & D/A CONVERTER

TUNER-F/S

IC-EEPROM

IC-VOLUME CONTROL

IC-POWER AMP

IC-POSI.ADJUST REG.

IC-POSI.FIXED REG.

POWER

IC803

IC801

IC301

D801S

IC801S

IC803S

Q403

Q404

QH407

QH408

QH406

1203-000298

1203-000165

1204-000517

0402-001399

1203-002091

AA13-00024A

0505-000156

0505-001116

0502-001187

0502-001104

0502-001100

KA7809

78R12

LA7845

GSDIB660

STR-F6658B

TNY253P

IRF620

BUZ73A

2SC5612

2SD921

2SD4125

IC-POSI.FIXED REG.

IC-POSI.ADJUST REG.

IC-VERTIVAL DEF.

IC-HYBRID

FET-SILICON

TR-POWER

Reference Information

Samsung Electronics 2-9

Block Des-Loc Part-Number IC Name Description

QH405

DH401

DH400

Q801

IC01

IC02

IC05

IC06

IC07

IC03

IC04

PIC01

PIC02

PIC04

PIC05

IC902

IC903

IC11

IC12

IC13

IC14

IC04

IC501

IC502

IC503

QF10

QF09

IC504

0505-001202

0402-001176

1004-000101

1204-001598

AA13-00095A

1002-001045

1204-001372

1204-001550

1105-001035

1204-001598

1109-001144

1203-001419

1203-001140

1203-001274

1203-001419

1203-001140

1203-001359

1202-000001

1203-001419

1201-001588

0502-000153

0502-000131

1201-000010

IRF640

FMQG5GS

SE140N-DIP

VPC3230D-A0

SDP01

SDA9280

SDA9361

CXA2101AQ

416S1120

VPC3230D-A0

81V04160

4931

7039

7545

4931

7039

1086

KA7533

4931

TDA6120Q

2SC2344-D

2SA1011A-D

2030

FET-HYBRID

TR-DIODE

IC-HYBRID

IC-VIDEO PROCESS

IC-ASIC

IC-D/A CONVERTER

IC-HOR./VER.PROCESS

IC-VIDEO PROCESS

IIC-DRAM

IC-DRAM

IC-VIDEO PROCESS

IC-FIFO

IC-VOLTAGE REGULATOR

IC-VOL.DETECTOR

IC-VOLTAGE REGULATOR

IC-VOL.DETECTOR

IC-POSI.FIXED REG.

IC-VOLTAGE COMP.

IC-VOLTAGE REGULATOR

IC-VIDEO AMP

TR-POWER

IC-OP AMP

POWER

F-BOX

CRT

Reference Information

2-10 Samsung Electronics

Block Des-Loc Part-Number IC Name Description

IC901

IC01

IC005

IC006

IC001

IC003

SEN01

DM03

IC601

IC602

AA13-00101A

1204-001556

1201-001199

1203-000515

AA09-00070A

AA32-00010A

1404-001039

1204-0001198

1201-000541

Z9037116PSC-OTP

UPD64082GF

IC-POWER AMP

IC-VOL. DETECTOR

IC MCU

SENSOR MAG

THERMISTOR-NTC

IC-DECODER

IC-OP AMP

IC-MCU

IC-SEPARATOR

6510, SIP

7042, T0-92, 3P

SPR2000, 42P

TMC3000NF, 35MA

Kohm, 1%, 3435K

DPL3519A

062

MICOM

3D-COMB

SUB

MICOM

CRT

SENSOR

TACK S/W

DOLBY

Specifications

Samsung Electronics 3-1

3. Specifications

Specifications are subject to change.

Model

Dimensions

(mm)

Weight

Set

Transmitter

Tuning Ranges

Television System

Intermediate Frequency

TSL3099WHFX

67 Kg 153 g (including batteries) Hi Contrast Instant Reception Type VHF (CH 2 ~ 13) UHF (CH 14 ~ 69)

CATV (CH 1, 14 ~ 125) NTSC-M VHF, UHF: 75 ohm unbalanced type Video: 45.75 MHz Sound: 41.25 MHz

Chrominance Subcarrier: 42.17 MHz Reverse Automatic Gain Control (Reverse AGC)

910 (W) x 455 (D) x 578 (H) 54 (W) x 31.5 (D) x 220 (H)

Set

Transmitter

Picture Tube

Antenna Input

Automatic Gain Control

Power Supply

AC 120 V, 60 Hz

DC 1.5V (AAA Size) x 2 180 W

Insulation Switch

7.5 W x 2, WOOFER : 25W x 1 Transmitter Adjustment: Infrared Rays Type

UHF/VHF electronic tuner fine tuning: Electronic Type Electronic Function Adjustment

Power Consumption

Rectification Sound Output

Adjustment System

Set

Transmitter

3-2 Samsung Electronics

MEMO

Alignment and Adjustments

Samsung Electronics 4-1

4. Alignment and Adjustments

4-1 Adjustments

Usually, a color TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as vertical size, horizontal size, and focus. Observe the picture and check for good black and white details. There must be no objectionable color shading: If color shading is present, demagnetize the receiver. If color shading persists, re-do purity and convergence adjustments.

Note :

1. This ‘4. Alignment and Adjustments’ applies to KS4A chassis applications.

2. AC Power Supply: 220 V only

3. This service manual has been written on the basis of domestic remote-control model adopting KS4A chassis. Depending on sales location and product specifications, some of specifications herein may be changed.

KS4A contains a dynamic focus circuit. When CRT PCB, FBT or CRT is replaced, be sure to adjust in the following sequence:

4-1-1 General Alignment Instructions

4-1-2 Focus Adjustment

Dynamic Focus Adjustment

1. Input a crosshatch pattern.

2. Select “Standard” from the menu,

3. Turn the Static Focus VR clockwise to set it to its maximum.

4. Turn the Dynamic Focus VR counterclockwise to set it to its maximum.

5. Turn the Static Focus VR counterclockwise slowly for the clearest center vertical line.

6. Turn the Dynamic Focus VR clockwise slowly for the clearest third line.

7. Check for the FOCUS of entire screen. If necessary, re-do adjustments 3~6.

STATIC FOCUS VR

DYNAMIC FOCUS VR

NO USE

After Adjustment

1 2

Alignment and Adjustments

4-2 Samsung Electronics

4-1-3 Screen Voltage Adjustment

1. Enter the Video/Component Mode. Just connect a jack and do not supply a video signal.

2. Use a DC multi-meter to identify RK, GK, BK. And then adjust FBT Screen VR so that the highest

voltage becomes 175 Vp-p.

4-1-4 White Balance Adjustment

1. Select “Standard” from the menu.

2. Input an 100% White pattern.

3. In standby, press the remote-control keys in the following sequence: Mute 1 8 2

Power on the TV set.

4. Warm up the TV set at least for 30 minutes.

5. Input a 10-step stair signal.

6. Use the Volume +/- buttons on the remote-control to select RDR, GDR, BDR, CON.

7. Adjust High-Light while viewing the brighter side of screen.

8. Use the Volume +/- buttons on the remote-control to select RCT, GCT, BCT, SBT.

9. Adjust Low-Light while viewing the darker side of screen.

10. If not proper, re-adjust White Balance.

11. Press the Power button to exit.

4-1-5 Sub-Brightness Adjustment

1. In standby, press the remote-control keys in the following sequence: Mute 1 8 2 Power on the TV set.

2. Use the Channel Up/Down buttons to receive the sub bright adjustment signal.

3. Use the Volume +/- buttons to select SBT.

4. Press the Menu or Mute button on the remote control to adjust so that the seventh step on

the right of screen cannot be seen.

5. Press the Memory button to exit.

Alignment and Adjustments

Samsung Electronics 4-3

This circuit uses in pulse width modulation method to check high voltage difference and then adjust energy of storage trans, in order to compensation and stabilize high voltage.

1)Block Diagram

Note1.

HIGH VOLTAGE REGULATOR CIRCUIT (Digital TV) : 32”, 36”

2) Circuit description

This circuit detect high voltage difference from FBT, will be compared with reference voltage of HVIC02. The varied voltage will be changed pulse width modulation by PWM Generator HV IC02 . This pulse will vary energy of storage trans(TD402S) according to high voltage difference the varied energy

is added to basic high voltage pulse of FBT. As a result, this circuit will be stable high voltage.

2-1) Working description in case of high voltage Up & Down

In case high voltage goes up(or down) due to change of beam current, the voltage of high voltage detection prove will be goes up(or down) according to Divider resistance value (which are inside of FBT(T444) and outside resistance), and this increased voltage will be supplied to PWM PULSE IC(HVIC02) pin #1.

B+ input

PWM OUT FET(QH405) (HVQ06 Ic Current control)

HV OUT Transistor (QH40 6 )

storage trans(TD402S)

F.B.T (T444S)

PWM generator & check high voltage differe nce (HVIC02)

High voltage output

High voltage Check

high voltage Detector

HVR19

reference voltage

HVR20

HVR02

HVR14

HVIC02

HVR10

HVDZ01

F/S CHECK

HVR36

HVQ01

TS13

PWM PULSE OUT PUT

ASSY-H/V

MODULE

Alignment and Adjustments

4-4 Samsung Electronics

This IC(HVIC02) provide a complete pulse width modulation system in a single monolithic intergrated circuit. The voltage which is inputed to HVIC02 pin #1 will be compared with reference voltage (HVIC02 pin #14, 5V), and then its difference voltage will be amplified. Its value will be convert PWM pulse in HVIC02, and then PWM pulse will be output from HVIC02 pin #9,#10. Transistor HVQ01 is used as Buffer for impedance matching.

The PWM duty which is outputed from HVQ01 is variable according to Beam current of high voltage. In case high voltage goes up (or down) due to change of Beam Current, PWM duty will be decreased (or increased). This pulse which is inputed to QH406 Gate(FBT) will be turn on between source and drain, and IC current of QH405 will be flow to primary of storage trans (TD402S) and then will be charge energy in primary of storage trans during trace period . This energy is variable according to pluse duty, and will be inducted to secondary of TD402S. The inducted energy will be added to basic high voltage generation pulse in FBT (T444S). As a result, high voltage will be regulated by this method.

3) F/S circuit description

In case high voltage goes up, consequently detected voltage will be goes up and this voltage will be divided regularly through R432,R433,R434,RR400S R and R441.

H- DRIVE

QH405

TS13

R449

CR410S

QH406

DZ400

D S

R486

L403

CR409S

D410

L481

+B INPUT

C47 2

TD402S

CR411S

FBT T444S

High voltage output

T444S

ANODE

X- ra y T es t pin

¤æ

Hight voltage check voltage

C48 0

R4 31

R4 30

RR401S

R432

HVR20

R433

HVIC02¤ PIN

¤¤

R434

R4 37

TL494CN HV- REG.

RR400S

R441

D411

HVIC03

TL431

F/S

Alignment and Adjustments

Samsung Electronics 4-5

This divided voltage will be inputed to HVIC03 pin #R, and then in this case voltage goes up more than

2.95V, Between pin #K and pin #A of HVIC03 will be turn on and will be decreased Base voltage of HVQ02, and then E-C of HVQ02 will be turn on and will be detected high level voltage by R482. Its value will be inputed HVIC02 pin #4(X-ray detect) , and high voltage oscillation will be OFF in order to protect X-ray. In this case, high voltage will be On if power is re-ON.

+12V

HVC03

HVR01

HVQ02

HVR13

F/S Detector

HVC02

HVIC03(TL43 1)

HVR25

HVR08

HVD01

TS14

HVDZ02

HVIC02

X- ray

Alignment and Adjustments

4-6 Samsung Electronics

The high voltage hold-down circuit prevent TV from damage caused by abnormal high voltage.

The high voltage hold-down circuit is implemented by detecting the variation of Heater voltage because

heater voltage varies with the variation of high voltage.

When the input voltage (A-Point) of QX01’s RESET IC is higher than 4.5V, MICOM #3 port is turned to

“HIGH” then power-off follows.

So to speak, if MICOM #3 port becomes “HIGH”, MICOM #1 port is controlled (from “HIGH” to “ LOW”)

and power-off is implememted.

Note2.

HOLD-DOWN OR SAFETY CIRCUIT INFORMATION : 29”, 34”

Fail Safe Test Point

Alignment and Adjustments

Samsung Electronics 4-7

4-2 SZM 414AZ (ZILOG90371) Micom

4-2-1 Pin Layout

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