Samsung CX528ZSE Manuale utente

WSC

FILE

NO.

P54S+RM101+SIF

CON.

SERVICE

MANUAL

COLOUR

RECEIVER

REMOTE

CONTROL

SYSTEM

CHASSIS

NO.:

P54S

RM101

MODEL

NO.:

CX528ZSE/SGVX

SAFETY

CAUTION

Before

serving

this

chassis

important

that

the

service

techinician

read

and

the

“Safety

Precaution”

and

"Product

Safety

Notice”

this

Service

Manual.

SPECIFICATIONS

Television

System

PAL/SECAM

SECAM

Bend

B.G D.K

VHF

PAL/SECAM

SECAM

8.G D.K

Colour

Sub—carrier

34.47

(Units:

MHz)

Channel

Coverage

Intermediate

Frequencies

Picture

Tube

14”,

16",

18,

20°

diagonal

measured,

In—line—gun,

Black

stripe

degrees

deflection

VHF

/UHF

Telescopic

dipole

entenna

(75

ohm

unbalanced

type)

Power

Requirements

220V,

AC.

SOHz

PRODUCT

SAFETY

NOTICE

Many

electrical

and

mechanical

parts

this

chassis

have

special

sefety-related

characteristics.

These

characteristics

are

often

passed

unnoticed

visual

inspection

and

the

protection

afforded

them

cannot

necessarily

ob—

tained

using

replacement

components

rated

for

higher

voltage,wattage,etc.

Replacement

parts

which

have

these

special

sefety

characteristics

are

identified

this

menue!

and

its

supplements;

electrical

components

having

such fea—

tures

are

identified

shading

the

schematic

diagram

and

the

perts

list.

Before

replacing

any

these

components,

read

the

perts

list

this

manual

carefully.

The

use

substitute

replacement

perts

which

not

have

the

same

safety

characteristics

specified

the

parts

list

may

create

shock,fire,X—ray

radiation

other

hazards.

SERVICE

NOTES

When

replacing

parts

circuit

boards,

clamp

the

lead

wires

terminals

before

soldering.

When

replacing

high

wattage

resistor

(oxide

metel

film

resistor)

circuit

board,

keep

the

resistor

10mm

(1/2

in.)

away

from

circuit

board.

Keep

wires

away

from

high

voltage

high

temperature

components.

any

Fuse

this

receiver

blown,

replace

with

the

FUSE

specified

the

chassis

parts

list.

C77

swact

(MASTR

$73)

Feet

inal

13.188

2504

: :

—

Tet

Ele

nCTON

nee!

onez

——

Lns2

382

a3e3

Ose)

ages

Caz

va203

vant

Yas

eac

eec

csc

“tn

Lses

eS!

sw2et

RLast

atces

vense

Rat

oneae7

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ces

ve-160)

irany

fc.

aye

bed

cana

meme

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ece

vaiss

Te-ne

Tueer

T11

won

cnnes

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TT)

ram

Ears

carez

pre

coset

TRIG

coc

cnc

SAFETY

INSTRUCTIONS

WARNING

BEFORE

SERVICING

THIS

CHASSIS,

READ

THE

“X-RAY

RADIATION

PRECAUTION,”

"SAFETY

PRECAUTION”,

"PRODUCT

SAFETY

NOTICE”

AND

"SERVICE

NOTICES”

DESCRIBED

BELOW.

X-RAY

RADIATION

PRECAUTION

Excessive

high

voltage

can

produce

potentially

hazard—

ous

X-RAY

RADIATION.

avoid

such

hazards,

the

high

voltage

must

not

above

the

specified

limit.

The

nominal

value

the

high

voltage

this

receiver

24.5KV

zero

beam

current

(mininum

brightness).

The

high

voltage

must

not,

under

any

circumstances,

exceed

25.5KV.

Each

time

receiver

requires

servicing,

the

high

vol-

tage

should

checked

following

the

HIGH

VOLTAGE

CHECK

procedure

this

manual.

recommended

the

reading

the

high

voltage should

recorded

part

the

service

record.

important

use

accurate

and

reliable

high

voltage

meter.

The

only

source

X-RAY

RADIATION

this

re—

ceiver

the

picture

tube.

For

continued

X-RAY

RA-

DIATION

protection,

the

replacement

tube

must

ex—

actly

the

same

type

tube

specified

the

parts

list.

Some

parts

this

receiver

have

special

safety-related

characteristics

for

X-RAY

RADIATION

protection.

For

continued

safety,

parts

replacement

should

un—

dertaken

only

after

referring

the

PRODUCT

SAFETY

NOTICE.

SAFETY

PRECAUTION

—

Potentials

high

25,000

volts

are

present

when

this

receiver

operating.

Operation

the

receiver

out—

side

the

cabinet

with

back

board

removed

involves

shock

hazard

from

the

receiver.

Servicing

should

not

attempted

anyone

who

not

thoroughly

familiar

with

the

precautions

necessary

when

working

high-voltage

equipment.

Alway

discharge

the

picture

tube

anode

the

re—

ceiver

chassis

keep

off

the

shock

hazard

before

removing

the

anode

cap.

Perfectly

discharge

the

high

potential

the

picture

tube

before

handling

the

tube.

The

picture

tube

highly

evacuated

and

broken,

glass

fragments

will

violently

expelled.

any

Fuse

this

receiver

blown,

replace

with

the

FUSE

specified

the

chassis

parts

list.

When

replacing

parts

circuit

boards,

wind

the

lead

wires

around

terminals

before

soldering.

When

replacing

high

wattage

resistor

(oxide

metal

film

resistor)

circuit

board,

keep

the

resistor

10mm

Keep

wires

away

from

high

voltage

high

temperature

components.

This

receiver

can

operated

under

220-240

volts,

50Hz.

NEVER

connect

supply

any

other

power.

PRODUCT

SAFETY

NOTICE

agram

and

the

parts

list.

X-RAY

RADIATION.

Many

electrical

and

mechanical

parts

this

chassis

have

special

safety-related

characteristics.

stics

are

often

passed

unnoticed

visual

inspection

and

the

X-RAY

RADIATION

protection

afforded

then

cannot

necessarily

obtained

using

replacement

components

rated

for

higher

voltage,

wattage,

etec.

Replace—

ment

parts

which

have

these

special

safety

cheracteristics

are

identified

this

manual

and

its

supplements,

ele—

ctrical

components

having

such

features

are

identified

the

international

hazard

symbols

the

schematic

di-

Before

replecing

any

these

components,

read

the

parts

list

this

manual

carefully.

The

use

substitute

re—

placement

parts

which

not

have

the

same

sefety

characteristics

specified

the

parts

list

may

create

These

characteri—

ALIGNMENT

GENERAL

Read

the

following

carefully

before

attempting

alignment.

)

warm

period

of at

least

twenty

minutes

should

allowed

for

proper

stabilization

test

equipment

and

receive

Alignment

requires

exact

procedure

and

sequence

contents.

fine

blade

non-metallic

alignment

tool

required

for

peaking

coils

during

alignment.

Isolation

transformer

should

used

prevent

shock

hazards.

The

test

equipment

specified

its

equivalent

required

perform

the

alignment

properly.

Use

equipment

that

does

not

meet

these

requirement

may

result

improper

alignment.

Correct

matching

the

equipment

essential.

Failure

use

the

proper

matching

will

result

response

which

can

not

represent

the

true

operation

the

receiver.

Excessive

signal

and

bias

voltages

from

the

generator

can

cause

overloading

the

receiver

circuits

and

distortion

the

response

curve.

All

shields

and

shield

grounding

braids

must

place

and

grounded

chassis

before

proceeding

with

alignment.

The

A.C.

power

line

voltage

should

kept

within

the

standard

voltage

volts

during

alignment.

10)

not

attempt

connect

disconnect

any

wire

while

the

receiver

operation.

MAGNIFIED

RESPONSE

ALIGNMENT

2.1.

EQUIPMENT

2.1.1.

Sweep

/Marker

generator

2.1.2.

Monitor

scope

(or

Oscilloscope)

2.1.3.

D.C.

Power

Supply

(+16.5Y)

2.1.4.

Bias

Supply

(+4V

+4.5V)

2.1.5.

Matching

Pad

(See

Figure

2.1.6.

Direct

probe

2.2

CONNECTIONS

MONITOR

SCOPE

SWEEP

/MARKER

GENERATOR

2.3.

PREPARATION

2.3.1.

Connect

the

horizontal

output

sweep/marker

generator

the

horizontal

input

monitor

scope.

2.3.2.

Set the

monitor

scope

gain

for

0.1V/DIV.

2.3.3.

Connect

the

output

sweep/marker

generator

series

with

matching

pad

test

point

the

tuner

thro

10K

ohm

resistor.

2.3.4.

Connect

the

monitor

scope

with

direct

probe

terminal

TP—11

2.3.5.

Apply

+16.5V

power

supply

TP—16

main

board.

2.3.6.

Apply

+4V-~+4.5V

bias

terminal

TP—14

main

board.

2.3.7.

Gradually

increase

decrease

the

output

sweep/marker

generator

obtain

the

1.0Vp—p

response

curve

the

scope.

necessary,

adjust

sweep

center

and

sweep

width

control

for

the

proper

location

curve.

2.4.

STEPS

Adjust

the

video

detector

coil

(1171)

for

maximum

amplitude

point

(See

Fig..-c

SYSTEM

TABLE

Colour

sub—cerrier

Picture

Intermediate

frequency

PAL

B/G,SECAM

B/G,D/K

34.47

MHz

38.9

MHz

103P

10K

OHM

FROM

GEN.

TEST

POINT

OUT

(TP)

OHM

Figure

MATCHING

PAD

Figure

OVERALL

RESPONSE

ALIGNMENT

3.1,

EQUIPMENT

3.1.1.

Sweep/Marker

generator

3.1.2.

Monitor

scope

3.1.3.

D.C.

Power

supply

(+16.5V)

3.1.4.

Bias

Supply

(+4V

+4.5V)

3.1.5.

Direct

probe

and

Matching

pad

(Figure

3.1.6.

Damping

Resistor

100

OHM

3.2.

CONNECTIONS

MONITOR

SCOPE

SWEEP

/MARKER

GENERATOR

Figure

Overall

Response

Alignment

3.3.

PREPARATION

3.3.1.

Disconnect

the

CNO1

connector.

3.3.2.

Connect

the

horizontal

output

sweep/marker

generator

the

horizontal

input

monitor

scope.

3.3.3.

Set

the

monitor

scope

gain

for

0.1V/cm.

3.3.4.

Connect

the

output

sweep/marker

generator

series

with

matching

pad

test

point

the

tuner

through

10K

ohm

resistor.

(Figure

3.3.5.

Connect

the

monitor

scope

with

direct

probe

terminal

TP—11

main

board.

3.3.6.

Connect

the

Damping

resistor

(100

ohm)

between

and

(IC101

#20,

#19).

3.3.7.

Apply

+16.5

volts

bias

terminal

TP-16

main

board.

3.5.8.

Apply

+4V-~+4.5

volts

bias

terminal

TP—14

main

board.

3.3.9.

Gradually

increase

(or

decrease)

the

output

sweep

/marker

generator

obtain

the

1.0Vp—p

response

curve

the

scope.

3.4.

STEP

5.4.1.

Adjust

7101

until

the

amplitude

response

curve

maximum,

the

levels

C&P

MARKER

are

the

same

level.

3.4.2.

necessary,

adjust

the

core

tuner

for

the

response

shown

Figure

103P

10K

OHM

FROM

GEN

TUNER

OUTPUT

OHM

Figure

Table

(Units:

MHz)

SYSTEM

PAL/SECAM,B.G

33.4

34.47 35.05

38.15

38.9

40.4

SECAM

D.K

30.9

32.4

34.47

35.05

38.15

38.9

40.4

AFC

RESPONSE

ALIGNMENT

4.1.

EQUIPMENT

4.1.1.

Sweep/marker

generator

4.1.2,

Monitor

scope

4.1.3,

Power

supply

(+16.5V)

4.1.4,

Bias

supply

(t4V~+4.5V)

4.1.5,

Matching

Pad

4.1.6.

Direct

probe

4.1.7.

Digital

Voltmeter

4.2.

PREPARATION

4.2.1.

Apply

+16.5

volts

TP—16

main

board.

4.2.2.

Apply

+4V

+4.5

volts

TP14

main

board.

4.2.3.

Connect

the

output

sweep/marker

generator

through

the

matching

pad

test

point

tuner.

4.2.4.

Connect

the

monitor

scope

with

direct

probe

terminal

TP-17.

4.2.5,

Put

the

AFC

switch

"OFF".

(except

remote

control

model)

4.2.6.

Gradually

increase

decrease

the

output

sweep/marker

generator

obtain

the

2Vp—p

response

curve.

4.5.

STEP

Adjust

T172(AFC

TANK

COIL)

the

PIF

marker

position

kept

just

the

reference

level.

After

this

adjustment,

PIF

keying

pulse

the

monitor

scope

must

minimum

amplitude.

(Refer

Figure

8.)

PIF

(P)

Point

Minimum

Amplitude

Level

2Vp-p

PAL

B/G,SECAM

B/G,D/K

38.9MHz

Keying

pulse

Figure

AFC

Response

Alignment

She

6.1;

6.2:

rae

dies

Tod.

8.1.

8.2.

HORIZ.

OSC.

ADJUSTMENT

PREPARATION

5.1.1.

Receive

Lion

Head

Pattern

5.1.2.

Short

TP-HO

and

TP—HG

with

short

jumper

ground

the

sync

input

for

free-running

oscillation.

STEPS

5.2.1.

According

above

item

5.1.2.

horiz

and

Vert

sync

will

out

sync.

5.2.2.

Maintain

vert

sync

best

state

with

VR302

(Vert.

Hold)

5.2.3.

Set

the

Horinontal

sync

with

VR401

(Horiz.

Hold)

remove

the

candition.

Adjust

the

HORIZONTAL

HOLD

the

center

the

pull—in

range.

FOCUS

ADJUSTMENT

PREPARATION

6.1.1.

Check

that

the

power

A.C.

line

normal.

(A.C.

220

volt,

50Hz)

6.1.2.

Connect

A.C.

line

and

the

receiver

power

switch

sets

ON”

position.

6.1.3.

Receive

black

and

white

signal.

6.1.4.

Turn

the

fine

tuning

control

for

indication

the

clearest

picture.

STEP

Adjust

the

focus

control

FBT(T444)

for

well

defined

scanning

lines

the

center

area

the

screen.

VERTICAL

HEIGHT

ADJUSTMENT

PREPARATION

7.1.1,

Check

that

the

A.C.

power

line

normal.

(AC

220

voit,

50Hz)

7.1.2.

Connect

A.C.

line

and

the

receiver

power

switch

sets

“ON”

position.

7.1.3.

Set

the

channel

selector

active

channel.

(Lion

Head

Pattern)

SIEPS

7.2.1,

Adjust

the

VERTICAL

HEIGHT

CONTROL

VR302

that

the

linearity

may

optimum

condition

when

the

inside

the

largest

circle

test

pattern

overscan

the

mask

the

top

bottom.

7.2.2,

And

the

center

the

circumference

circle

test

pattern

should

visible

than

circles.

NOTE

While

this

alignment,

set

the

brigtness

and

contrast

contro!

maximum

position.

B+

ADJUSTMENT

Apply

voltmeter

TP—125.

Adjust

125V

with

VR801

main

board.

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