Samsung CS762ANT/SEHX Manual de usuario

COLOR

TELEVISION

RECEIVER

CHASSIS:

SCT55A

MODEL:

CS762ANT/SEHX

CS762ANT/POLX

FRVICE

Manual

Precautions

exe)

Mo)

d=]

@=AV/

0-110)

ni)

Reference

information

Specifications

Disassembly

and

Reassembly

Alignment

and

Adjustments

Troubleshooting

Exploded

Views

and

Parts

List

Electric

Parts

List

Block

Diagrams

10.

PCB

Layout

11.

Wiring

Diagram

12.

Schematic

Diagrams

Precautions

these

safety,

servicing

and

ESD

precautions

prevent

damage

and

protect

against

potential

hazards

such

electrical

shock

and

X-rays.

1-1

Safety

Precautions

sure

that

all

the

built-in

protective

devices

are

replaced.

Restore

any

missing

protective

shields.

When

reinstalling

the

chassis

and

its

assemblies,

sure

restore

all

protective

devices,

including:

nonmetallic

control

knobs

and

compartment

covers.

Make

sure

that

there

are

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.

the

measured

resistance

less

than

1.0

megohm

greater

than

5.2

megohms,

abnormality

exists

that

must

corrected

before

the

unit

returned

the

customer.

Leakage

Current

Hot

Check

(Figure

1-1):

Warning:

not

use

isolation

transformer

during

this

test.

Use

leakage-

current

tester

metering

system

that

complies

with

American

National

Standards

Institute

(ANSI

C101.1,

Leakage

Current

for

Appliances),

and

Underwriters

Laboratories

(UL

Publication

UL1410,

59.7).

With

the

unit

completely

reassembled,

plug

the

line

cord

directly

into

the

power

outlet.

With

the

unit's

switch

first

the

position

and

then

OFF,

measure

the

current

between

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

power-plug

prongs

the

outlet

and

repeat

the

test.

Fig.

1-1

Leakage

Test

Antenna

Cold

Check:

With

the

unit's

plug

disconnected

from

the

source,

connect

electrical

jumper

across

the

two

prongs.

Connect

one

lead

the

ohmmeter

prong.

Connect

the

other

Jead

the

coaxial

connector.

X-ray

Limits:

The

picture

tube

especially

designed

prohibit

X-ray

emissions.

ensure

continued

X-ray

protection,

replace

the

picture

tube

only

with

one

that

the

same

type

the

original.

Carefully

reinstall

the

picture

tube

shields

and

mounting

hardware;

these

also

provide

X-ray

protection.

High

Voltage

Limits:

High

voltage

must

measured

each

time

servicing

done

the

B+,

horizontal

deflection

high

voltage

circuits.

Correct

operation

the

X-ray

protection

circuits

must

reconfirmed

whenever

they

are

serviced.

(X-ray

protection

circuits

also

may

called

"horizontal

disable"

“hold-

down".)

Heed

the

high

voltage

limits.

These

include

the

X-ray

Protection

Specifications

Label,

and

the

Product

Safety

and

X-ray

Warning

Note

the

service

data

schematic.

See

Samsung

Electronics

1-1

Safety

Precautions

(Continued)

10.

11.

12.

13.

High

voltage

maintained

within

specified

limits

close-tolerance,

safety-related

components

and

adjustments.

the

high

voltage

exceeds

the

specified

limits,

check

each

the

special

components.

Design

Alteration

Warning:

Never

alter

add

the

mechanical

electrical

design

this

unit.

Example:

not

add

auxiliary

audio

video

connectors.

Such

alterations

might

create

safety

hazard.

Also,

any

design

changes

additions

will

void

the

manufacturer's

warranty.

Hot

Chassis

Warning:

Some

receiver

chassis

are

electrically

connected

directly

one

conductor

the

power

cord.

isolation

transformer

not

used,

these

units

may

safely

serviced

only

the

power

plug

inserted

that

the

chassis

connected

the

ground

side

the

source.

confirm

that

the

power

plug

inserted

correctly,

the

following:

Using

voltmeter,

measure

the

voltage

between

the

chassis

and

known

earth

ground.

the

reading

gteater

than

1.0V,

remove

the

power

plug,

reverse

its

polarity

and

reinsert.

Re-measure

the

voltage

between

the

chassis

and

ground.

Some

chassis

are

designed

operate

with

volts

between

chassis

and

ground,

regardless

the

plug

polarity.

’

These

units

can

safely

serviced

only

isolation

transformer

inserted

between

the

receiver

and

the

power

source.

Some

chassis

have

secondary

ground

system

addition

to’

the

main

chassis

ground.

This

secondary

ground

14,

system

not

isolated

from

the

power

line.

The

two

ground

systems

are

electrically

separated

insulating

material

that

must

not

defeated

altered.

Components,

parts

and

wiring

that

appear

have

overheated

that

are

otherwise

damaged

should

replaced

with

parts

that

meet

the

original

specifications.

Always

determine

the

cause

damage

overheating,

and

correct

any

potential

hazards.

15.

16.

17.

18.

Observe

the

original

lead

dress,

especially

near

the

following

areas:

Antenna

wiring,

sharp

edges,

and

especially

the

and

high

voltage

power

supplies.

Always

inspect

for

pinched,

out-of-pliace,

frayed

wiring.

not

change

the

spacing

between

components

and

the

printed

circuit

board.

Check

the

power

cord

for

damage.

Make

sure

that

leads

and

components

not

touch

thermally

hot

parts.

Picture

Tube

Implosion

Warning:

The

picture

tube

this

receiver

employs

"integral

implosion"

protection.

ensure

continued

implosion

protection,

make

sure

that

the

replacement

picture

tube

the

same

the

original.

not

remove,

install

handle

the

picture

tube

without

first

putting

shatterproof

goggles

equipped

with

side

shields.

Never

handle

the

picture

tube

its

neck.

Some

“in-line”

picture

tubes

are

equipped

with

permanently

attached

deflection

yoke;

not

try

remove

such

"permanently

attached"

yokes

from

the

picture

tube.

Product

Safety

Notice:

Some

electrical

and

mechanical

parts

have

special

safety-related

characteristics

which

might

not

obvious

from

visual

inspection.

These

safety

features

and

the

protection

they

give

might

lost

the

replacement

component

differs

from

the

original--even

the

replacement

rated

for

higher

voltage,

wattage,

etc.

Components

that

are

critical

for

safety

are

indicated

the

circuit

diagram

shading,

(A\)

(A\).

Use

replacement

components

that

have

the

same

ratings,

especially

for

flame

resistance

and

dielectric

strength

specifications.

replacement

part

that

does

not

have

the

same

safety

characteristics

the

original

might

create

shock,

fire

other

hazards.

Samsung

Electronics

1-2

Servicing

Precautions

WARNING1:

First

read

the

“Safety

Precautions”

section

this

manual.

some

unforeseen

circumstance

creates

conflict

between

the

servicing

and

safety

precautions,

always

the

safety

precautions.

WARNING2:

electrolytic

capacitor

installed

with

the

wrong

polarity

might

explode.

Servicing

precautions

are

printed

the

cabinet.

them.

Always

unplug

the

unit's

power

cord

from

the

power

source

before

attempting

to:

(a)

Remove

reinstall

any

component

assembly,

(b)

Disconnect

electrical

plug

connector,

(c)

Connect

test

component

parallel

with

electrolytic

capacitor.

Some

components

are

raised

above

the

printed

circuit

board

for

safety.

insulation

tube

tape

sometimes

used.

The

internal

wiring

sometimes

clamped

prevent

contact

with

thermally

hot

components.

Reinstall

all

such

elements

their

original

position.

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.

Check

the

insulation

between

the

blades

the

plug

and

accessible

conductive

parts

(examples:

metal

panels,

input

terminals

and

earphone

jacks).

Insulation

Checking

Procedure:

Disconnect

the

power

cord

from

the

source

and

turn

the

power

switch

ON.

Connect

insulation

resistance

meter

(500V)

the

blades

the

plug.

The

insulation

resistance

between

each

blade

the

plug

and

accessible

conductive

parts

(see

above)

should

greater

than

megohm.

Never

defeat

any

the

B+

voltage

interlocks.

not

apply

power

the

unit

(or

any

its

assemblies)

unless

all

solid-state

heat

sinks

are

correctly

installed.

Always

connect

test

instrument's

ground

lead

the

instrument

chassis

ground

before

connecting

the

positive

lead;

always

remove

the

instrument's

ground

lead

last.

1-3

Precautions

for

Electrostatically

Sensitive

Devices

(ESDs)

Some

semiconductor

("solid

state")

devices

are

easily

damaged

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

component

damage

caused

static

electricity.

Immediately

before

handling

any

semiconductor

components

assemblies,

drain

the

electrostatic

charge

from

your

body

touching

known

earth

ground.

Alternatively,

wear

discharging

wrist-strap

device.

(Be

sure

remove

prior

applying

power--this

electric

shock

precaution.)

After

removing

ESD-equipped

assembly,

place

conductive

surface

such

aluminum

foil

prevent

accumulation

electrostatic

charge.

not

use

freon-propelled

chemicals.

These

can

generate

electrical

charges

that

damage

ESDs.

Samsung

Electronics

Use

only

grounded-tip

soldering

iron

when

soldering

unsoldering

ESDs.

Use

only

anti-static

solder

removal

device.

Many

solder

removal

devices

are

not

rated

“anti-static”;

these

can

accumulate

sufficient

electrical

charge

damage

ESDs.

not

remove

replacement

ESD

from

its

protective

package

until

you

are

ready

install

it.

Most

replacement

ESDs

are

packaged

with

leads

that

are

electrically

shorted

together

conductive

foam,

aluminum

foil

other

conductive

materials.

Immediately

before

removing

the

protective

material

from

the

leads

replacement

ESD,

touch

the

protective

material

the

chassis

circuit

assembly

into

which

the

device

will

installed.

Minimize

body

motions

when

handling

unpackaged

replacement

ESDs.

Motions

such

brushing

clothes

together,

lifting

foot

from

carpeted

floor

can

generate

enough

static

electricity

damage

ESD.

1-3

Reference

Information

MEMO

Reference

Information

2-1

Tables

Abbreviations

and

Acronyms

Table

2-1

Abbreviations

Ampere

Megavolt

Ampere-hour

Megawatt

Angstrom

Megohm

Decibel

Meter

Decibel

Referenced

Microampere

One

Milliwatt

Microfarad

Degree

Celsius

Microhenry

Degree

Fahrenheit

Micrometer

degree

Kelvin

Microsecond

Farad

Microwatt

Gauss

Milliampere

Gigahertz

Milligram

Gram

Millihenry

Henry

Milliliter

Hertz

Millimeter

Hour

Millisecond

Inches

Per

Second

Milfivolt

Kilowatt-hour

Nanofarad

Kilogram

Ohm

Kilohertz

Picofarad

Kilohm

Pound

Kilometer

Revolutions

Per

Minute

Kilometer

Per

Hour

Revolutions

Per

Second

Kilovolt

Second

(Time)

Kilovolt-ampere

Volt

Kilowatt

Volt-ampere

Liter

Watt

Megahertz Watt-hour

22a222ERR

ERE

83a

Samsung

Electronics

Samsung

Electronics

2-1

Reference

information

Table

2-2

Table

Acronyms

ABL

ACC

AFC

AFT

AGC

ANS!

APC

AVC

BAL

BPF

B-Y

CATV

ecb

CCTV

CRT

EIA

ESD

ESO

FBP

FBT

GNO

G-Y

HI-FI

Automatic

Brightness

Limiter

Alternating

Current

Automatic

Chroma

Control

Audio

Frequency

Automatic

Frequency

Contro!

Automatic

Fine

Tuning

Automatic

Gain

Control

Amplitude

Modulation

American

Nationa!

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/0

LED

MOSFET

MTS

NAB

NEC

NTSC

oso

PCB

PLL

PWM

QiF

SAP

SAW

SIF

SMPS

S/N

™

UHF

vcD

vco

VCXO

input/output

Left

Low

Light

Emitting

Diode

Low

Frequency

Metal-Oxide-Semiconductor-Field-Effect-Tr

Multi-channel

Television

Sound

National

Association

Broadcasters

National

Electric

Code

National

Television

Systems

Committee

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

WavelFilter)

Sound

Intermediate

Frequency

Switching

Mode

Power

Supply

Signal/Noise

Switch

Test

Point

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

Samsung

Electronics

2-21C

Line

atch

see

processing

200

SOTieS

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Video,

Chroma

Processing

300

Series

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ges

Vertical

Deflection

RV,CV,LV,QV

..»

V/M

Section

RCI

OJAI

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NICAM

Section

RP,CP,LP,XP,ICP

RC,CC,DZC,QC

COMB

Filter

Section

RP,PD

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POWER-S/W

Section

Samsung

Electronics

2.3

Reference

Information

2-3

Line

Table

2-1

Line

Loc

No.

Specification

Description

Remarks

1€201

TDA8375

ONE

CHIP

PROCESSOR

{C203

TDAS177

LINE

TRANSIENT

IMPROVEMENT

(LTI

BOOSTER)

{C205

TEA5S114A

R/G/B

SWITCHING

SCART

OPTION

10206

TEAS114A

R/G/B

SWITCHING

TTIX/0SD

eae

[ea

14A

R/G/B

SWITCHING

[aie

1C208

TDAS170

YUV

PICTURE

IMPROVEMENT

PROCESSOR

IC301

LA7845

VERTICAL

AMP

POWER

10403

MC4558C

AMPLIFIER

(EW

AMPLIFIER)

POWER

10501

TDA61010

VIDEO

OUTPUT

AMPLIFIER

CRT

ficsee

roasrora

VIDEO

OUTPUT

AMPLIFIER

CRT

(C503

TDAS1010

VIDEO

OUTPUT

AMPLIFIER

CRT

fem

10505

SPK101T

mcassec

«|

AMPLIFIER

{TILT

AMPLIFIER)

cRT

SPOT

KILLER

HYBRID

CRT

frosor

tonoers

DIGITAL

SOUND

PROCESSOR

AUDIO

MODULE

1C6002

TDA9808

VIF/SIF

PROCESSOR

{SIF

PROCESSOR)

AUDIO

MODULE

IC6003

TDA7050

2-CHANNEL

HEADPHONE

AMPLIFIER

AUDIO

MODULE

1C6004

MC4558C

AMPLIFIER

(AUDIO

AMPLIFIER)

AUDIO

MODULE

1601

TDA7297

SOUND

AMP

1C701

CXA1855S

AUDIO/VIDEO

SWITCHING

(C801

STR-S6703

]

SMPS

CONTROL

“|

power

1802

LTV817B

PHOTO

COUPLER

POWER

1901

289313(Z90341}

MICRO

PROCESSOR

ees

KIA7042P

RESET

1C903

pagar

SWITCHABLE

REGULATOR

2-4

Samsung

Electronics

Loc

No.

Specification

pom

coos

KA7812A

coos

KA7805A

1C907

KA7808

mee

KA7805A

1c910

KA7805A

ICP101

TDAS160A

ICP105

SDAS189X

$DA9187-2X

PAP102

TDA4665

1€203

TDA8395P

ICTO1

swcure

Option:

OSD

Language

Table

2-1

Line

(Continued)

Description

KA7808

REGULATOR

12V

REGULATOR

Reference

Information

Remarks

REGULATOR

E2PROM

REGULATOR

Table

2-2

PAL/NTSC/SECAM

DECORDER

AND

SYNC

PROCESSOR

PIP

MODULE

PIP

PROCESSOR

PIP

MODULE

PIP

PROCESSOR

PIP

MODULE

PRE-AMP

HYBRID

BASE

BAND

DELAY

LINE

SECAM

MODULE

SECAM

DECORDER

SECAM

MODULE

toc

No.

Specification

Description

Remarks

ecasaies

ENG/ARAB/FRENCH

SZM-162SEC

ENG/CHINA

4{¥———

SZM-162SER

ENG/RUSSIA/CRO/BUL

ree

see

SZM-162SEP

ENG/POLAND/ROMANIA/CZECH

SZM-162SET

ENG/THAt

SZM-162SEV

ENG/MAL/IND/VIETAM

SZM-162SEH

ENG/RUSSIA/TURKEY

HUNGARY

Samsung

Electronics

2-5

Spee

eee

ee:

Eanes

MEMO

Specifications

MODEL

“|

722A/3002A

————

cae

Frequency

Synthesizer

SYSTEM

COLOUR

PAL,

SECAM,

NTSC3.58,

NTSC4.43

B/G,

D/K,

|.M

—

B/G,!

ANTENNA

IMPEDANCE

ohm

unbalanced

coaxial

SCREEN

SIZE

70.8

REQUIREMENTS

FREQUENCY

Specifications

are

subject

change.

Main

voltage

220V/230V/240V

Range

100

260V

Samsung

Electronics

Samsung

Electronics

Disassembly

and

Reassembly

MEMES

Disassembly

and

Reassembly

4-1

Cabinet

Remove

screws

located

the

side

the

cabinet.

Pull

the

Main

Assembly

backwards

remove.

reassemble,

place

the

receiver

flat

surface

and

repeat

the

sequence

reverse

order.

Tocheck

that

the

Chassis

Assembly

installed

correctly,

attempt

pull

from

the

front

cabinet.

——7

Fig.

4-1

wate

3-2

Samsung

Electronics

Samsung

Electronics

Disassembly

end

Reassercly

4-2

Speaker

pact

Separate

Connectors

Separate

wires

from

twist-lock.

Remove

screws,

©.

reassemble,

repeat

the

sequence

reverse

order.

Fig.

4-2

Samsung

Electronics

Disassembly

and

Heassemoly

4-3

Chassis

Assembly

4-3-1

Removal

from

Front

Cabinet

Lift

and

pull

back

the

chassis

mounting.

pie

Fig.

4-3

{dL

Samsung

Electronics

4-3

Disassembly

and

Reassembly

4-3-2

Terminal

Board

Removal

Pull

the

power

cord

the

left

and

remove

it.

Remove

screws

Lift

the

brackets

©).

Separate

the

terminal

board

from

the

chassis

mount.

reassemble,

refer

Fig.

4-6.

TERMINAL-BOARD

HOLDER-CHASSIS

S-VHS

Jack

Fig.

4-5

ore

stuff

the

left

and

right

bottom

the

terminal

board

“hole

the

holder

chassis.

“

—_

Insert

Fig.

4-6

4-4

Samsung

Electronics

Disassembly

and

Reassembly

4-3-3

PCB

Removal

Refer

the

Fig.

4-4

Remove

the

wire

(1P)

from

the

chassis

mounting.

Pull

the

PCB

guides

backwards.

Lift

both

edges

the

PCB

and

pull

out.

Disassembly

Ensure

that

the

PCB

well

positioned

the

PCB

guides.

The

power

cord

must

not

touch

the

heat-sink,

D73.

Insert

the

PCB

guide

the

direction

shown

that

the

two

yrs

meet

each

other.

The

PCB

guide

part

the

chassis

mounting;

new

PCB

guide

needed,

the

complete

chassis

mounting

must

replaced.

4-3-4

SNAPIN

Removal

SNAPIN-CONTROL

Fig.

4-7

Press

the

SNAPIN

(b)

with

thumb;

pull

the

left

hotder-bracket

(a}

with

index

finger.

aes

Samsung

Electronics

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