Samsung tsk2790 service manual

COLOR TELEVISION RECEIVER

Chassis : KS4A(N) Model : TSK2792FX/XAA TSK2790FX/XAA

TSK2792FX/XAC TSK3290FX/XAA TSK3092WFX/XAC TSK3092WFX/XAA TSK3292FX/XAA TSK3292FX/XAC

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

3KS4A(N)-2901

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 IC Line Up

POWER

Block Des-Loc Part-Number IC Name Description

MAIN

IC601 IC701 IC702 IC703

TU01

TUP01

IC905 ICG01 ICH01 IC602

IC603, ICD603

IC804 IC805

ICD02

IC802

1204-001594 1001-001073 1001-001113

1002-001193 AA40-00020A AA40-00032A

1103-001213

0801-000314

1204-001454

1201-000407

1201-001026

1203-000203

1201-000191

1203-000293

MSP3440G-B6

TEA6415C

TEA6422

PCF8591P

TCLN318PA09A(S)

TCPN3081PC09A(S)

24C16

74HCT86

TDA7449L

TDA7050 TDA7265

SI3050 SI3050

4558

KA7808

IC-SOUND PROCESSOR IC-VIDEO SWITCH IC-AUDIO SWITCH IC-A/D & D/A CONVERTER TUNER-F/S TUNER-F/S IC-EEPROM IC-CMOS LOGIC IC-VOLUME CONTROL IC-POWER AMP IC-POWER AMP IC-POSI.ADJUST REG. IC-POSI.ADJUST REG. IC-OP AMP IC-POSI.FIXED REG.

POWER

IC803 IC801 IC301

IC403 IC801S IC803S

QH04

Q403 Q404 Q405 Q801

1203-000298 1203-000165 1204-000517

1202-000103 AA13-00018A AA13-00024A

0502-000442

0505-000156

0505-001116

0502-001175 AA13-20004H

KA7809

78R12

LA7845

LM393

STR-F6656

TNY253P

2SC4636RB

IRF620

BUZ73A

2SC5446

SE135N-LF12

IC-POSI.FIXED REG. IC-POSI.ADJUST REG. IC-VERTIVAL DEF. IC-VOLTAGE COMP. IC-HYBRID IC-HYBRID TR-POWER FET-SILICON FET-SILICON TR-POWER IC-HYBRID

2-4 Samsung Electronics

Reference Information

Part-Number

IC Name

CRT

3D-COMB

DOLBY

IC-OP AMP

Block Des-Loc Part-Number

F-BOX

IC01 IC02 IC05 IC06 IC07 IC02 IC03

IC04 PIC01 PIC02 PIC04 PIC05 IC902 IC903

1204-001598

AA13-00095A

1002-001045 1204-001372 1204-001550 1105-001172 1105-001035 1105-001035 1204-001598 1109-001144 1203-001419 1203-001419 1203-001140 1203-001274

IC Name

VPC3230D-A0

SDP01 SDA9280 SDA9361

CXA2101AQ

416C1204 416S1120 416S1120

VPC3230D-A0

81V04160

4931 4931 7039 7545

Description

IC-VIDEO PROCESS IC-ASIC IC-D/A CONVERTER IC-HOR./VER.PROCESS IC-VIDEO PROCESS IC-DRAM IC-DRAM IC-DRAM IC-VIDEO PROCESS IC-FIFO IC-VOLTAGE REGULATOR IC-VOLTAGE REGULATOR IC-VOL.DETECTOR IC-VOL.DETECTOR

CRT

DOLBY

MICOM

3D-COMB

IC11 IC12 IC13 IC14

IC04 IC501 IC502 IC503 QF10 QF09 IC504

IC601 IC602

IC901

IC01

1203-001419 1203-001140 1203-001359 1202-000001 1203-001419 1201-001131 1201-001131 1201-001131 0502-000153 0502-000131 1201-000010

1204-001198 1201-000541

AA13-00012A

1204-001556

4931 7039 1086

KA7533

4931 TDA6111Q TDA6111Q TDA6111Q

2SC2344-D

2SA1011A-D

2030

DPL3519A

062,SOP,8P

Z9037112PSC-OTP

UPD64082GF

IC-VOLTAGE REGULATOR IC-VOL.DETECTOR IC-POSI.FIXED REG. IC-VOLTAGE COMP. IC-VOLTAGE REGULATOR IC-VIDEO AMP IC-VIDEO AMP IC-VIDEO AMP TR-POWER TR-POWER IC-OP AMP IC-DECODER

IC-OP AMP IC-MCU IC-SEPARATOR

Specifications

Samsung Electronics 3-1

3. Specifications

Specifications are subject to change.

Model

Dimensions

(mm)

Weight

Set

Transmitter

Tuning Ranges

Television System

Intermediate Frequency

Set

Transmitter

TSK2792FX, TSK2790FX, TSK3092WFX, TSK3292FX, TSK3290FX

56.3 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)

862 (W) x 515 (D) x 585 (H) 54 (W) x 31.5 (D) x 220 (H)

CT-29A7PD9X, CT-34A7PD9X

Set

Transmitter

Picture Tube

Antenna Input

Automatic Gain Control

Power Supply

AC 120 V, 60 Hz

AC 100-240, 50/60Hz

DC 1.5V (AAA Size) x 2

180 W Insulation Switch 15 W x 2, 8 ohm

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

Power Consumption

Rectification Sound Output

Adjustment System

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 Low-Light while viewing the darker side of screen.

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

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

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

11. Press the Memory 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

The high voltage hold-down circuit prevent TV from damage caused by abnormal high voltage. The energy of FBT(T444S) primary winding is transfered to the secondary winding and the amount of energy is exactly proportional to high voltage output. The voltage which is induced from high voltage output is filtered and applied to the reference pin (#12) of IC06 through fail safe circuit.

If the high voltage is increase to higher point than hold down reference voltage (DZ403), this voltage is set by two resistors(RX01,RX02),then the voltage level of IC06 reference pin reaches to its threshold voltage and IC06 turns on.

By the activation of IC06.

The pulse of Horizontal drive turn to zero and the high voltage output fully disabled the three components, RX02,DD03 and DR22, Make hold down reference voltage.

And the DZ403 current can flow through the three components and the current the voltage level of IC06 (#12) is maintained always at high level so the protection cannot be disabled (except reset AC power) .

Note1.

HOLD-DOWN OR SAFETY CIRCUIT INFORMATION

Fail Safe Test Point

DR46

FBT(T444S)

Heater

IC06

DD02

DR21

RX01

DX02

DX01

DZ403

X-RAY Protection

DC26

DR22

DD03

RX02

Anode Voltage

DC130V

ABL

H.Drive

Alignment and Adjustments

4-4 Samsung Electronics

4-2 SZM 410A(ZILOG90371) Micom

4-2-1 Pin Layout

Alignment and Adjustments

Samsung Electronics 4-5

PIN NO

PIN NAME

POWER CONTROL OUTPUT REMOCON INPUT

MAIN AFT INPUT

4-2-2 Port Assignment

PIN NO

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

PIN NAME

P16/SCLK POWER IRIN IR INPUT

P0C VGA ID P0B P0A

P09 P0D P07/CYNC

P06/CNTR 5VB CHECK P03/1HSYNC 1HSYNC H/V SYNC FOR CCD P01/I2CSC SCL2 E2PROM/PIP only P02/I2CSD SDA2 E2PROM/PIP only, CVI/ADC0 CVBS IN CCD COMPOSITE INPUT LPF LOOP FILTER

AGNDF GND ADC5 S-AFT

P04/ADC4 KEY1 VOL UP/DOWN,CH UP/DOWN, KEY SCAN INPUT PORT 1 P04/ADC3 MAIN AFT P04/ADC2 KEY2 POWER,MENU.TV/VIDEO, KEY SCAN INPUT PORT 2 P04/ADC1 BUS STOP AGND GND AVCC VCC P0F/SOVL HALF TONE V3(B) OSD B V2(G) OSD G V1(R) OSD R OVL BLANK HSYNC HSYNC VSYNC VSYNC P12/I2CMD2 SDA1 P11/I2CMC2 SCL1 P0E WP E2PROM WRITE PROTECT

D4 PIN

POWER CONTROL OUTPUT REMOCON INPUT

PC SIGNAL DETECTOR, X-RAY DETECTOR N.C N.C N.C

1080i S/W 1080i B+ UP S/W

N.C

5V-B+ CHECK

LOOP FILTER ANALOG GND PIP AFT INPUT

MAIN AFT INPUT

I2C BUS STOP

ANALOG GND ANALOG VCC HALF TONE BLUE SIGNAL OF OSD GREEN SIGNAL OF OSD RED SIGNAL OF OSD BLANKING SIGNAL OF OSD HORIZONTAL SYNC INPUT FOR OSD

VERTICAL SYNC INPUT FOR OSD I2C BUS DATA 1 I2C BUS CLK 1

DESCRIPTION

I2C BUS CLK2 I2C BUS DATA 2

Alignment and Adjustments

4-6 Samsung Electronics

PIN NO

33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50 51

PIN NAME D4 PIN I2CMD1 N.C I2CMC1 N.C RESET RESET

RESET INPUT

XTAL1 XTAL1 XTAL2 XTAL2 GND GND VCC VCC

GND

VCC

GND GND GND PWM1 S-RESET PWM2 TILT PWM3 MUTE PWM4 D-COIL

SOUND RESET TILT CONTROL

SOUND AMP MUTE DEGAUSSING COIL CONTROL OUTPUT

PWM5 LED1 STAND BY LED

PWM6 LED2

TIMER LED P10/R(0) N.C P08/R(1) N.C P18/G(0) HOLD P13/G(1) N.C

P14/B(0)

N.C

P15/B(1) N.C

DESCRIPTION

Alignment and Adjustments

Samsung Electronics 4-7

KS4A chassis needs I2C for service mode adjustments. Since the outgone TV set has been adjusted optimum, I2C Adjustment doesn’t need excluding when CRT, FBT, EEPROM (IC902) is replaced.

4-3-1 Entering the Service Mode

In standby, press the remote-control keys in the following sequence: MUTE 1 8 2 POWER When the Service Mode is entered, use the Channel UP/DOWN buttons on the remote control to move to the item to adjust.

4-3-2 Adjustments Adjust

Detailed Items: Use the Channel UP/DOWN buttons. Data Adjustment: Use the Volume +/- buttons. Channel Switching: Enter the Channel No.

4-3-3 Special Notes

1. When IC902 (EEPROM) is replaced, warm up the TV for 4~5 seconds after plugging in.

2. After IC902 (EEPROM) is replaced, enter the Service Mode and standard data for all items.

3. Make the following adjustments: Geometric, White Balance, Sub-contrast, PIP contrast, Sub-brightness

4-3 Service Mode Adjustments

Alignment and Adjustments

4-8 Samsung Electronics

4-4 Option Byte

(HEX)

USA

CANADA NT Latin America

BYTE

B0 B1 B2 B3 B4 B5

FUNCTION

WIDE V-CHIP AFN NO PC NO ACS

NO X-RAY

OPTION BYTE

OPTION BYTE 0OPTION BYTE 1

NORMAL WIDE NORMAL WIDE NORMAL WIDE

XXXX

0A 0B 08 09 30 31

0123

0 : 4:3 (NORMAL) 1 : WIDE (16:9)

0 : V-CHIP OFF 1 : V-CHIP ON

0 : AIR/STD/HRC/IRC

1 : AIR/STD/HRC/AFN

0 : PC ON

1 : PC OFF

0 : ACS ON

1 : ACS OFF

0 : X-RAY ON

1 : X-RAY OFF DON'T CARE

XXXX

XX XXXX

DON'T CARE

0123

DON'T CARE

Alignment and Adjustments

Samsung Electronics 4-9

V-V EHT

H-SIZE

PIN PHS

PIN AMP

100 (FIXED) 100 (FIXED) 100 (FIXED) 100 (FIXED)

4-5 Geometric

29"

FLAT

34"

FLAT

32"

WIDE

DESCRIPTION

RF Mode 85 480P Mode 115 1080i Mode 95

PC Mode 100

RF Mode 65 480P Mode 100 1080i Mode 80

PC Mode 80

RF Mode 80 480P Mode 110 1080i Mode 85

PC Mode 90

V-SHIFT

V-SIZE

100 100

80 140 140

70 100 110 115

V-LINE

100

95 105 120 120 110 110 110 115 105 115

VSC

V-S CORR 135 (FIXED) 135 (FIXED) 135 (FIXED) 130 (FIXED)

80 (FIXED) 80 (FIXED) 80 (FIXED)

100 (FIXED)

30 (FIXED) 30 (FIXED) 30 (FIXED) 30 (FIXED)

V-V EHT 42 (FIXED) 42 (FIXED) 42 (FIXED) 42 (FIXED) 42 (FIXED) 42 (FIXED) 42 (FIXED) 42 (FIXED)

100 (FIXED) 100 (FIXED) 100 (FIXED) 100 (FIXED)

H-SIZE

145 50 45 145 80 40 130 40 55 120 85 40 145 30 40 140 50 40 120 30 40 130 35 40 140 55 35 140 70 35 130 35 40 115 85 30

PPH PAM

PIN PHS

PIN AMP

29"

FLAT

34"

FLAT

32"

WIDE

DESCRIPTION

RF Mode 480P Mode 1080i Mode

PC Mode

RF Mode 480P Mode 1080i Mode

PC Mode

RF Mode 480P Mode 1080i Mode

PC Mode

UPC LOC HEH HS VAN VBO HSP

UP-CORR LO-CORR H-EHT H-SHIFT V-ANGLE V-BOW H-SYC-PH

150 30 12(FIXED) 110 95 125 138 (FIXED) 155 90 12(FIXED) 35 100 130 133 (FIXED) 170 35 12(FIXED) 35 95 125 139 (FIXED) 140 95 12(FIXED) 85 95 120 140 (FIXED) 150 30 12(FIXED) 115 130 130 138 (FIXED) 155 50 12(FIXED) 35 120 130 133 (FIXED) 170 30 12(FIXED) 35 130 125 139 (FIXED) 115 30 12(FIXED) 85 130 125 140 (FIXED) 155 100 12(FIXED) 110 120 135 138 (FIXED) 135 90 12(FIXED) 45 115 130 133 (FIXED) 170 80 12(FIXED) 50 115 125 139 (FIXED) 165 120 12(FIXED) 85 120 135 140 (FIXED)

Alignment and Adjustments

4-10 Samsung Electronics

PICTURE

32" WIDE

4-6 Picture

PICTURE

DESCRIPTION

RDR GDR BDR RCT GCT BCT

R-DRIVE G-DRIVE B-DRIVE R-CUT OFF G-CUT OFF B-CUT OFF

29" 34" FLAT

32 32 (FIXED) 32 20 20 (FIXED) 20

32" WIDE

20 20 (FIXED) 20 20 20 (FIXED) 20

DESCRIPTION

SBT CON COL HUE GAM

SUB-BRT UB-CON UB-COL SUB-HUE GAMMA

29" 34" FLAT

35 5 12(FIXED) 5 (FIXED) 10 (FIXED)

32" WIDE

25 5 8 5 (FIXED) 7 (FIXED)

RF : 38

32" WIDE

4-7 White Balance

DESCRIPTION

29" 34" FLAT

32" WIDE

DESCRIPTION

29" 34" FLAT

32" WIDE

DESCRIPTION

29" 34" FLAT 245 (FIXED) 112 (FIXED) 112 (FIXED) 88 (FIXED)

32" WIDE

RDR GDR BDR RCT GCT BCT

R-DRIVE G-DRIVE B-DRIVE R-CUT OFF G-CUT OFF B-CUT OFF

32 32 (FIXED) 32 20 20 (FIXED) 20 20 20 (FIXED) 20 20 20 (FIXED) 20

SBT CON COL HUE GAM

SUB-BRT UB-CON UB-COL SUB-HUE GAMMA

35 5 12(FIXED) 5 (FIXED) 10 (FIXED) 25 5 8 5 (FIXED) 7 (FIXED)

VML

VM-LEVEL

RF : 38

117 (FIXED) 112 (FIXED) 112 (FIXED) 88 (FIXED)

480 : 48 1080 : 58 PC : 68

34" 32"

29"

W/B

H/L L/L

x:275, y:295, y:45 x:275, y:265, y:50 x:262, y:264, y:45

x:275, y:265, y:2 x:275, y:265, y:2.5 x:250, y:250, y:2

Alignment and Adjustments

Samsung Electronics 4-11

MEMORY DESCRIPTION

No. Item

Description

0 V Shift Vertical Shift 1 V Size Adjusts the vertical image size 2 V Linearity Adjusts the vertical linearity 3 V S Correction

Vertical S-Correction

4 V EHT Adjusts the vertical variance (depending on the high pressure) 5 H Size

Adjusts the horizontal size

6 Pin Phase

Adjusts the left/right symmetry of pincushion

7 Pin AMP

Adjusts Pincushion

8 Upper Corner

Adjusts the upper corner

9 Lower Corner

Adjusts the lower corner 10 H EHT Adjusts the horizontal variance (depending on the high pressure) 11 H Shift Horizontal Shift 12 V Angle Adjusts so that the vertical line becomes rectangular 13 V Bow Adjusts so that the vertical lines are symmetrical 14 H Sync Phase Adjusts the horizontal sync phase

Alignment and Adjustments

4-12 Samsung Electronics

4-8 Screen Change (I2C Bus Geometric Adjustment)

1 V Shift

V Slope

3 H EW

6 V Amp

V SC

H Trapizium

4 H Parabola

5 H Corner

H Symmetry

H Shift

Alignment and Adjustments

Samsung Electronics 8-1

8. Block Diagrams

8-1 Voltage/Current Block

Troubleshooting

Samsung Electronics 5-1

5. Troubleshooting

5-1 No Power

Disconnect

the power cord

Check

Power LED

LED OFF

Check

IC901 B+

Abnormal

Check

R455

Abnormal

Check

IC803S, PC802S

FA802S

Abnormal

Check

CN902

LED ON

Normal

Check/Replace

IC902, Check I2CII

Normal

Check IC905

(EEPROM)

Check TRANS 28V,

16V LINE

QF09, QP10

Abnormal

IC804, FA801S

Abnormal

Check

Q405

Check

Check IC901 pins

35 ,

Check

Q802

Normal

Check

RL802S

Normal

Check

135V line

Normal

Check

F-BOX 5V

B+

Normal

Abnormal

Check the voltage of Trans Pin

Check IC801S, DZ803, PC801S, DZ804, Q801

Replace

Q802

Replace

Q802

Normal

Check IC902,IC903

Abnormal

Check D806

Check F-BOX

HD, VD

Abnormal

Check

F-BOX I2C

Check

Q404, Q405

Normal

Replace

F-BOX

Check

H-BLK, V-BLK

LINE

5-2 No Raster (Sound OK)

Troubleshooting

5-2 Samsung Electronics

Check the fusible

resistance

NO RASTER

(SOUND OK)

Check the fusible

resistance of

abnormal voltage line

Abnormal

Check the voltage

of heater

Normal

Check CRT and FBT

Abnormal

Check Q504

Abnormal

Check

OSD is normal

Normal

Check

CVBS LINE

TUNER

Normal

Check

CVBS LINE

TEA6415

Normal Normal

Check RK, GK, BK

on the CRT PCB

Check CXA2101

Abnormal

Check

B+(200V, 16V)

Normal

Check IC501, IC502, IC503 and readjust the screen voltag

Normal

Check

CVBS LINE

COMB

Normal

Check CVBS LINE

VPC3230

Troubleshooting

Samsung Electronics 5-3

5-3 No Sound

NO SOUND

Check speaker

and wire

Abnormal

Check Tuner B+

and SIF

Normal

Check

CN601signal

Check

the input

signal of IC601

Normal

Check

IC601 B+

Normal

Abnormal

Check

the input signal of

IC603

Abnormal

117

Normal

Check

IC603 B+

Normal

Replace IC603

Abnormal

Check

FA802S

Check IC601 pins

5251

Check/Replace

IC601

Check

B+(BV) LINE

Check

Dolby-Sound module

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