Sony Trinitron kv-27sxr10 User manual

ou,

73

US

Model

Chassis

No.

SCC-5951-A

Canadian

Model

Chassis

No.

SCC-607H-A

4s

B

CHASSIS

Note:

The

service

manual

for

RM-755

has

|

MODELS

OF

THE

SAME

SERIES

been

issued

separately.

|

KV-27SXR10

|

fe

SPECIFICATIONS

American

TV

standard

VHF:

2-13

UHF:

14-69

Cable

TV:

1-125

Microblack

Trinitron

tube

27-inch

picture

measured

diagonally

28-inch

picture

tube

measured

diagonally

VIDEO

INPUT

1,

2

and

3

(phono

jacks)

Video:

1

Vp-p,

75-ohms

unbalanced,

sync

negative

Audio:

500

m¥rms

(100%

modulation)

impedance:

47

kilohms

S

VIDEO

INPUT

(4-pin

mini

DIN)

Y:

1

Vp-p,

7o0hms

unbalanced,

sync

negative

C:

0.286

Vp-p

(Burst

signal)

75-ohms

Television

system

Channel

coverage

Picture

tube

tnput

Output

Power

requirements

Power

consumption

Accessories

supplied

Optional

accessories

MONITOR

OUTPUT

(phono

jacks)

Video:

1

Vp-p,

75-ohms

unbalanced,

sync

negative

Audio:

500

mVrms

(100%

modulation)

impedance:

10

kilohms

AUDIO

OUTPUT

(VARIABLE)

(phono

jacks)

More

than

408

mvVrms

at

the

maximum

volume

setting

(variable)

(100%

modulation)

impedance:

10

kilohms

170W

(max.}

1W

(in

standby

condition)

Remote

Commander

RM-755

with

2

size

AA

batteries

Antenna

connector

U/V

mixer

EAC-66

Connecting

cord

VMC-810S/8208

RK-74A

Design

and

specifications

subject

to

change

without

notice.

ee

a

|

MICROFILM

TRINITRON

COLOR

AN

ISOLATION

TRANSFORMER

SHOULD

BE

USED

DURING

ANY

SERVICE

TO

AVOID

POSSIBLE

SHOCK

HAZARD,

BECAUSE

OF

LIVE

CHASSIS.

THE

CHASSIS

OF

THIS

RECEIVER

IS

DIRECTLY

CON.

NECTED

TO

THE

AC

POWER

LINE.

SAFETY-RELATED

COMPONENT

WARNING

!!

COMPONENTS

IDENTIFIED

BY

SHADING

AND

MARK

A

ON

THE

SCHEMATIC

DIAGRAMS,

EXPLODED

VIEWS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUBLISHED

BY

SONY.

CIRCUIT

ADJUSTMENTS

THAT

ARE

CRITICAL

TO

SAFE

OPERATION

ARE

IDENTIFIED

IN

THIS

MANUAL.

FOLLOW

THESE

PRO-

CEDURES

WHENEVER

CRITICAL

COMPONENTS

ARE

REPLACED

OR

IMPROPER

OPERATION

!S

SUSPECTED.

AFIN

D’EVITER

TOUT

RISQUE

D’ELECTROCUTION

PROVENANT

D’UN

CHASSIS

SOUS

TENSION,

UN

TRANSFORMATEUR

D'ISOLEMENT

DOIT

ETRE

UTILISE

LORS

DE

TOUT

DEPANNAGE.

LE

CHASSIS

DE

CE

RECEPTEUR

EST

DIRECTEMENT

RACCORDE

A

L’ALIMENTATION

SECTEUR.

ATTENTION

AUX

COMPOSANTS

RELATIFS

ALA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

ET

PAR

UNE

MARQUE

/\

SUR

LES

SCHEMAS

DE

PRINCIPE,

LES

VUES

EXPLOSEES

ET

LES

LISTES

DE

PIECES

SONT

D'UNE

IMPORTANCE

CRITIQUE

POUR

LA

SECURITE

DU

FONCTIONNEMENT.

NE

LES

REM-

PLACER

QUE

PAR

DES

COMPOSANTS

SONY

DONT

LE

NUMERO

DE

PIECE

EST

INDIQUE

DANS

LE

PRESENT

MANUEL

OU

DANS

DES

SUPPLEMENTS

PUBLIES

PAR

SONY.

LES

REGLAGES

DE

CIRCUIT

DONT

L’IMPOR-

TANCE

EST

CRITIQUE

POUR

LA

SECURITE

DU

FONCTIONNEMENT

SONT

IDENTIFIES

ANS

LE

PRESENT

MANUEL.

SUIVRE

CES

PROCEDURES

LORS

DE

CHAQUE

REMPLACEMENT

DE

COMPOSANTS

CRITIQUES,

OU

LORSQU’UN

MAUVAIS

FONCTIONNE-

MENT

EST

SUSPECTE.

|

i

KV-27SXR10

|

RM-755

i

TABLE

OF

CONTENTS

Section

Title

Page

Section

Title

Page

1.

GENERAL

4,

SAFETY

.....

16

1-1.

Location

and

Function

of

Controls

........

4

TD

(Operations.

aud

4

tas

Bay

Ee

eo

6

5.

CIRCUIT

ADJUSTMENTS

1-3.

Presetting

Channels.........-......2--

7

5-1.

A

Board

Adjustments

..........0+025003

19

1-4.

Applications

with

Optional

Equipment

......

8

5-2.

D

Board

Adjustments

..........---00055

21

1-5.

Troubleshooting

..

64.0.4

e

ee

eee

lat

9

6.

DIAGRAMS

2.

DISASSEMBLY

6-1.

Printed

Wiring

Boards

....

0.2.0.0

00

re

23

2-1,

Rear

Cover

Removal

...............0.0-.

10

6-2.

Circuit

Boards

Location

...........++505

27

2-2.

Main

Chassis

Removal

..............05.

10

6-3.

Schematic

Diagrams

..........-00

250058

27

2-3.

Service

Position

..........2

2.2005

ce

eee

10

6-4.

“Semiconductors:

xcs

vir

ets

ag

eee

ss

PAS

41

2-4.

Picture

Tube

Removal

..............004.

11

7.

EXPLODED

VIEWS

3.

SET-UP

ADJUSTMENTS

721

Rear:

Cover

=

4...

ak

eed

GE

AE

GES

eS

42

3.7

“Beam

Wanding'2.0.2¢

kia

Mia

se

os

Sy

Aes

12

7220

Pictire

Vube

eh

ee

oe

PP

43

3-2),

“Gorivergente:

jek

Sih

fe

eee

aS

EY

A

13

3-3.

Focus

Adjustment

.............0.000.

15

8.

ELECTRICAL

PARTS

LIST........---.

44

3-4.

White

Balance

...........0-

00000

ca

ee

15

WARNING

1!

ATTENTION!

KV-278

XRIO

RM-75

SAFETY

CHECK-OUT

(US

MODEL

ONLY)

After

correcting

the

original

service

problem,

perform

the

following

safety

checks

before

releasing

the

set

to

the

customer:

1.

Check

the

area

of

your

repair

for

unsoldered

or

poorly-soldered

connections.

Check

the

entire

board

surface

for

solder

splashes

and

bridges.

3

2.

Check

the

interboard

wiring

to

ensure

that

no

wires

are

‘pinched’?

or

contact

high-wattage

resistors.

3.

Check

that

all

control

knobs,

shields,

covers,

ground

straps,

and

mounting

hardware

have

been

replaced.

Be

absolutely

certain

that

you

have

replaced

all

the

insulators.

4.

Look

for

unauthorized

replacement

parts,

par-

ticularly

transistors,

that

were

installed

during

a

Point

them

out

to

the

customer

and

recommend

their

replacement.

LA

Look

for

parts

which,

though

functioning,

show

obvious

signs

of

deterioration.

Point

them

out

to

the

customer

and

recommend

their

replace-

ment.

6.

Check

the

line

cord

for

cracks

and

abrasion.

Recommend

the

replacement

of

any

such

line

cord

to

the

customer.

7.

Check

the

condition

of

the

monopole

antenna

(if

any).

Make

sure

the

end

is

not

broken

off,

and

has

the

plastic

cap

on

it.

Point

out

the

danger

of

broken

the

recommend

ntenna’s

antenna

to

the

a

on

a

and

replacement.

impalement

customer,

8

Check

the

B+

and

HV

to

see

they

are

at

the

values

specified.

Make

sure

your

instruments

are

accurate;

be

suspicious

of

your

HV

meter

if

sets

always

have

low

HV.

9.

Check

the

antenna

terminals,

metal

trim,

“metallized”

knobs,

screws,

and

all

other

exposed

metal

parts

for

AC

leakage.

Check

leakage

as

described

below.

To

Exposed

Meta!

Parts

on

Set

|

AC

i

voltmeter

(0.75

V}

|

i

|

iu

|

O15

pF

+

S1.540

y

1

om

Earth

Ground

Fig.

A.

Using

an

AC

voltmeter

to

check

AC

leakage.

|

LEAKAGE

TEST

The

AC

leakage

from

any

exposed

metal

part

to

earth

ground

and

from

all.exposed

metal

parts

to

any

exposed

metal

part

having

a

return

to

chassis,

must

not

exceed

0.SmA

(S00

microampers).

current

can

be

measured

by

any

one

of

three

methods.

Leakage

1.

A

commercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-S40A.

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

to

A

battery-operated

AC

milliammeter.

The

Data

Precision

245

digital

multimeter

is

suitable

for

this

job.

3.

Measuring

the

voltage

drop

across

a

resistor

by

means

of

a

VOM

or

battery-operated

AC

volt-

meter.

The

“limit”

indication

is

0.75

V,

so

meters

must

have

an

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

of

a

passive

VOM

that

is

suitable.

Nearly

all

battery

operated

digital

2V AC

range

are

analog

accurate

low-

voltage

scale.

multimeters

that

have

a

suitable.

(See

Fig.

A)

HOW

TO

FIND

A

GOOD

EARTH

GROUND

A

cold-water

pipe

is

guaranteed

earth

ground,

the

cover-plate

retaining

screw

on

most

AC

outlet

boxes

is

also

at

earth

ground.

If

the

retaining

screw

is

to

be

used

as

your

earth-ground,

verify

that

it

is

at

ground

by

measuring

the

resistance

between

it

and

a

cold-

water

pipe

with

an

ohmmeter.

The

reading

should

be

zero

ohms.

If

a

cold-water

pipe

is

not

accessible,

connect

a

60-100

watts

trouble

light

(not

a

neon

lamp)

between

the

hot

side

of

the

receptacle

and

the

retaining

screw.

Try

both

slots,

if

necessary,

to

locate

the

hot

side

of

the

line,

the

lamp

should

light

at

norma!

brilliance

if

the

screw

is

at

ground

potential.

(See

Fig.

B)

Trouble

Light

Ohmmeter

Cold-water

Pipe

Fig.

8.

Checking

for

earth

ground.

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KV-27SXR10

RM-755

SECTION

2

DISASSEMBLY

2-1.

REAR

COVER

REMOVAL

(T>

~

four

screws

ra

(3)

two

screws

(BVTP4

x

16)

a

(2)

four

screws

(BVTP4

x

16)

2-3,

SERVICE

POSITION

QD

Insert

A

block

assembly

into

the

two

holes

of

main

chassis.

2-2,

MAIN

CHASSIS

REMOVAL

BY

@)

Turn

it

80°

in

the

direction

of

arrow.

40s:

KV-27SXR10

RM-755

2-4,

PICTURE

TUBE

REMOVAL

}

Remove

the

five

holders

in

the

arrow

direction

indicated

in

the

TEX

(5)

anode

cap

three

special

screws

(3)

Remove

the

claw

at

the

bottoms

of

the

bezel

in

the

arrow

direction

indicated

in

the

arrows.

2

200000

(4)

bezel

assy

REMOVAL

OF

ANODE

CAP

«

Removing

Procedures

(¥

yo

VS

.

®

Turn

up

one

side

of

the

rubber

cap

in

the

direction

indicated

by

the

arrow

®.

/

@)

Using

a

thumb,

pull

up

the

rubber

cap

firmly

in

the

direction

indicated

by

the

arrow

(6).

(2)

When

one

side

of

the

rubber

cap

is

separated

from

the

anode

button,

the

anode

cap

can

be

removed

by

turning

up

the

rubber

cap

and

pulling

up

it

in

the

direction

of

the

arrow

©.

Anode

button

KV-27SXR10

RM-755

SECTION

3

SET-UP

ADJUSTMENTS

@

The

following

adjustment

should

be

made

when

a

complete

realighment

is

required

or

a

new

picture

tube

is

installed.

@

These

adjustments

should

be

performed

with

rated

power

supply

voltage

unless

otherwise

noted.

Controls

and

switch

should

be

set

as

follows

unless

otherwise

noted:

PICTURE

button

verter

80%

BRIGHTNESS

cerrresertresereees

50%

‘3-1,

BEAM

LANDING|

Preparation

:

@

Feed

in

the

white

pattern.

@

Before

starting,

degauss

the

entire

screen.

1,

Turn

on

set

power

supply

and

receive

an

all-white

signal.

2.

Evenly

degauss

the

entire

screen.

3.

Loosen

the

deflection

yoke

mounting

screw,

and

set

the

purity

contro!

to

the

center

as

shown

in

Figure

3~1,

4.

Set

BKG

VR

®

to

maximum

and

set

®

and

©

to

minimum.

5.

Move

the

deflection

yoke

back,

and

adjust

the

purity

control

so

that

®

is

in

the

center

and

©

and

®

are

at

the

sides,

evenly.

(Figure

3-2.)

6.

Move

the

deflection

yoke

forward

so

that

the

entire

screen

is

red.

1

*{If

the

deflection

yoke

is

pushed

all

the

way

to

the

CRT

then

moved

slightly

back,

landing

adjustment

is

easier.

7.

Substitute

©,

then

®

for

®

in

step

4

and

check

|

landing.

|

8.

Rotate

®,©@

and

®

once

each

and

check

landing.

|

9.

When

landing

is

not

right,

adjust

the

purity

control

|

and

use

magnets

as

shown

in

figure

3-3,

then

|

repeat

steps

7

and

8.

10.

When

a

magnet

is

used,

be

sure

to

perform

step

|

2,

and

tighten

deflection

yoke

mounting

screw

LL

loosely.

|

©.©

purity

controi

|

Lo

y

®

screw

@,

@

|

I

Note:

The

circled

numbers

L

(@

—

@)

shown

above

steps.

Perform

the

adjustments

in

order

as

follows:

1.

Beam

Landing

2.

Convergence

3.

Focus

Adjustment

4.

White

Balance

Note:

Test

Equipment

Required.

1.

Color-bar/Pattern

Generator

2.

Degausser

3.

Oscilloscope

purity

contro}

|

Disk

magnets

Ler

rotatable

disk

magnets

|

‘

H

i

Purity

contro]

corrects

this

area.

|

correct

these

areas

(a~d).

YZ

Defiection

yoke

positioning

|

corrects

these

areas.

\

3-2.

CONVERGENCE

Preparation

:

.

®

Before

starting,

perform

FOCUS,

H.

SIZE,

and

V.

SIZE

adjustments.

@

Set

BRIGHTNESS

to

minimum.

@

Feed

in

the

dot

pattern.

(1)

Horizontal

and

Vertical

Static

Convergence

center

dot

center

dot

V.

STAT

Magnet

RV703

B

DRIVE

|

<

be

_|

RV705

G

A

SAY

z

DRIVE

i

we

Ty

|

Bits

RV702

B-BKG

~

SQNP

|

RV704

G-BKG

ae

-RV707

SUB

BRT

RV706

R-BKG

RV701

H.

STAT

1.

Adjust

H.

STAT

VR

to

coincide

red,

green

and

blue

dots

on

the

center

of

screen

(Horizontal

movement).

2.

Adjust

V.

STAT

magnet

to

coincide

red,

green

and

blue

dots

on

the

center

of

screen

(Vertical

movement).

3.

If

the

red,

green

and

blue

dots

do

not

coincide

on

the

center

of

screen

with

H.

STAT

VR,

perform

horizontal

convergence

adjustment

using

H.

STAT

VR

and

V.

STAT

magnet

as

shown

below.

(In

this

case,

H.

STAT

VR

and

V.

STAT

magnet

effect

each

other.)

®

Tilt

the

V.

STAT

magnet

and

adjust

static

convergence

to

open

or

close

the

V.

STAT

magnet.

KV-27SXR10

RM-755

KV-27SXR10

RM-755

4.

When

the

V.

STAT

magnet

is

moved

in

the

direction

of

arrow

@

and

©,

Red,

Green

and

Blue

dots

move

as

shown

below.

®

@

©

O

6216

B

1

B

f

\

G

-——G

aut

re

@

R

G

B

®

B

GR

®

2

fy

~®

\

4®

@®

HMC

and

VMC

correction

for

Hexapole

Magnet.

1.

HMC

(Horizontal,

Mis,

convergence)

correction

and

motion

of

the

Electron

Beam

with

the

Hexapole

Magnet.

HMC

correction

(B)

HMC

correction

(A)

A<B

2.

VMC

(Vertical,

Mis,

convergence)

correction

and

motion

of

the

Electron

Beam

with

the

Hexapole

Magnet.

VMC

correction

(A)

VMC

correction

(B)

€2p

€20

c>D

C=D

,

A

x

OR

_+-OR

OR

+-OR

$,

fb

ac

ele

9°

Loc

0

6

®

‘

5

to

Mot

ioe

$68

7

(2)

Dynamic

Convergence

Adjustment

Preparation

:

@

Before

starting,

perform

Horizontal

and

Vertical

Static

Convergence

Adjustment.

1.

Loosen

deflection

yoke

screw.

2.

Remove

deflection

yoke

spacers.

3.

Move

the

deflection

yoke

for

best

convergence

as

shown

in

Fig.

3-4.

4,

Tighten

the

deflection

yoke

screw.

Install

the

deflection

yoke

spacers.

a

purity

Mg

V.

STAT

Mg

|

BMC

Mg

(hexapole

magnet)

li

BGR

R

Q)

ice)

'-27SXR10

KV-27SXR10

RM-755

in

the

2.

VMC

(Vertical,

Mis,

convergence)

correction

and

d

Blue

motion

of

the

Electron

Beam

with

the

Hexapole

Magnet.

:

>

VMC

correction

(A)

VMC

correction

(B)

(3)

“o

R

lagnet.

dn

and

xapole

Ox

On

Ov,

t_

oe

Own

C<D

C#=D

c>D

C#D

A

*

ORO

OR

HOR

lee

sel-

ele

er.

-O

pm

+-0G

§

@08

D

G

"D.

gD!

t

1-OB

-O8B

OB

+08

,

(2)

Dynamic

Convergence

Adjustment

Preparation:

@

Before

starting,

perform

Horizontal

and

Vertical

Static

Convergence

Adjustment.

1.

Loosen

deflection

yoke

screw.

2.

Remove

deflection

yoke

spacers.

3.

Move

the

deflection

yoke

for

best

convergence

as

shown

in

Fig.

3-4.

4.

Tighten

the

deflection

yoke

screw.

5.

Install

the

deflection

yoke

spacers.

O-OrO

O-O-O

RGB

BGR

purity

Mg

V.

STAT

Mg

{

BMC

Mg

(hexapole

magnet)

f

:

Fig.

3-4

(3)

Screen-corner

Convergence

|

a-—d:

screen-corner

misconvergence

(3-3.

FOCUS

ADJUSTMENT

Adjust

FOCUS

control

on

the

flyback

transformer

for

a

best

focus.

FLYBACK

TRANSFORMER

(71707)

\

FOCUS

a

Fig.

3-5

3—4

WHITE

BALANCE

@®

Feed

in

the

dot

signal

from

pattern

generator.

@®

PICTURE

button

80%

BRIGHTNESS

crceccececeseeeneeees

50%

[SCREEN

(G2)]

1.

Adjust

BKG

VRs

(RV702,

RV704,

and

RV706)

so

that

voltages

on

the

red,

green

and

blue

cathodes

are

180

V

de

with

an

oscilloscope

as

shown

in

Fig.

3-6.

ron

180

V

de

Pee

nee

Fig.

3-6

|

KV-27SXR10

RM-755

Affix

a

permalloy

ass’y

correspondig

to

the

misconverged

areas.

@®

YF

©)

ex

©

Permalloy

assembly

(Part

No.

X-4306-312-0)

2.

Observe

the

screen

and

adjust

RV708

(SCREEN)

to

obtain

the

faintly

visible

background

of

dot

signal.

Note

the

color

that

first

becomes

visible

by

turning

SCREEN

VR.

Do

not

turn

a

BKG

contro!

for

this

color.

[WHITE

BALANCE]

1.

Feed

in

the

white

signal

from

pattern

generator.

2.

Set

the

PICTURE

button

to

obtain

the

faintly

visible

raster

on

the

screen.

3.

Observe

the

screen

and

adjust

the

other

two

BKG

VRs

for

best

white

balance.

4.

Set

the

PICTURE

button

at

maximum.

5.

Observe

the

screen

and

adjust

the

DRIVE

VRs

(RV703,

RV705)

for

best

white

balance.

6.

Repeat

steps

2

through

5

several

times.

KV-27SXR10

|

RM-755

SECTION

4

SAFETY

b4R1707,

CONFIRMATION

METHOD

(HOLD-DOWN

CONFIRMATION)

AND

READJUSTMENTS

The

following

adjustments

should

always

be

performed

when

replacing

the

following

components

(marked

with

(4

on

the

schematic

diagram).

IC1710,

PM1700,

R1703,

R1707,

R1700,

R1713,

R1716

(1)

Preparation

before

confimation

1.

Turn

the

POWER

switch

ON,

and

receive

entirely

white

signals

and

set

the

PICTURE

and

BRIGHTNESS

buttons

to

maximum.

2.

Confirm

that

the

voltage

of

the

TP85

is

more

than

13

V

DC

when

the

set

is

operating

normally

with

120

V

AC

supply.

(2)

Hold-down

operation

confirmation

1.

Turn

the

POWER

switch

ON,

and

receive

entirely

white

signals

and

adjust

ABL

current

to

1580

+20

u

A

with

PICTURE

and

BRIGHT

etc

buttons.

2.

Apply

DC

voltage

of

over

17.38

V

gradually

to

the

TP85

via

1T40

from

the

DC

stavilized

power

source.

Confirm

that

the

minimum

voltage

is

less

than

18.38

V

DC

whereby

the

raster

disappears

during

operation

of

hold-down

circuit.

NOTE:

When

the

hold-down

circuit

starts

operating,

switch

OFF

the

POWER

of

the

set

immediately.

3.

Turn

the

POWER

switch

ON,

and

receive

dot

signals

and

adjust

ABL

current

to

210

£10

nA

with

PICTURE

and

BRIGHT

etc

buttons.

4.

Apply

DC

voltage

of

over

18.51

V

gradually

to

the

TP85

via

1T40

from

the

DC

stavilized

power

source.

Confirm

that

the

minimum

voltage

is

less

than

19.51

V

DC

whereby

the

raster

disappears

during

operation

of

hold-down

circuit.

NOTE:

When

the

hold-down

circuit

starts

operating,

switch

OFF

the

POWER

of

the

set

immediately.

(3)

Hold-down

readjustment

When

step

(2)

is

not

satisfied,

readjustment

should

be

performed

by

altering

the

resistance

value

of

R1707

(a

component

marked

with

b4).

T1701)

FBT

1

ammeter

\

3.0

mA

de

range

i

1

ABL

©

ie

|

ABL

C1699

CONFIRMATION

WHEN

REPLACING

H.,

V.

R.(HIGH-

VOLTAGE

REGISTOR)

The

following

adjustments

should

always

be

performed

with

reference

to

whether

an

X-ray

radiation

control

circuit

is

connected

or

not,

when

replacing

H.

V.

R.

(High-Voltage

Registor)

*

This

check

is

to

be

performed

when

H.

V.

R.

only

is

replaced,

and

has

no

relation

to

the

hold-down

circuit

readjustment

for

replacement

of

parts

marked

id.

(1)

Connection

confirmation

1.

Turn

the

POWER

switch

ON,

and

receive

entirely

white

signals

and

set

the

PICTURE

and

BRIGHTNESS

buttons

to

maximum.

2.

When

the

set

is

operating

normally

with

120

V

AC

supply

confirm

that

the

voltage

of

the

TP85

is

over

13

V

DC.

*Use

a

digital

multimeter

whose

input

impedance

over

100

M®

when

confirming

the

voltage

of

the

TP85.

CONFIRMATION

WHEN

REPLACING

IC681

With

the

condition

that

applying

AC

120

V

and

the

TV

set

is

in

operation,

confirm

the

AC

relay

will

go

off

when

150.5

+0.5

V

is

supplied

to

TP91

from

an

external

DC

power

supply.

Remove

the

external

DC

voltage

immediately

after

the

relay

went

off.

[+B

MAX

VOLTAGE

CONFIRMATION

The

following

adjustments

should

always

be

performed

when

replacing

IC681.

(1)

The

+B

voltage

confirmation

1.

Supply

13022

V

AC

to

with

variable

auto-

transformer.

2.

Receive

monoscope

signals.

Set

the

PICTURE

button

into

80%

and

the

BRIGHTNESS

button

into

RESET.

4.

Confirm

the

voltage

of

TP91

is

less

than

136.0

V

DC.

5.

If

step

4

is

not

satisfied,

replace

IC681

and

repeat

above

steps.

wo

HV

ammeter

3.0

mA

de

range

KV-27SXR10

KV-275xX

RM-755

UNUIgGO

ee,

hye

R10

M-755

R

KV-27S

RM-755

KV-27SXR10

ned

itrol

only

own

‘ked

irely

and

OV

P85

ance

the

|

go

‘rom

the

med

uto

-

the

imeter

mult

digital

OV

peat

dc

power

supply

regulated

multimeter

rs)

oa

ae

ce]

HV

ammeter

O

mA

de

range

3

1T40

t

re

i

es

KV-

27SXR10

M-755

KV-27SXR10

|

RM-755

SECTION

5

CIRCUIT

5-1.

A

BOARD

ADJUSTMENTS

A

board

~—Component

side—

CV316

ADJUSTMENTS

[14.3

MHz

f,|

MHz

[14.3

MHz

f,|

G

LO

bd

RV303

[Hue

cenT)

©

@

RV304

ACC]

NM301

Peer

+82)

A

CHAR

T101

|

Posi

©

PESO

By

até

L_O

IC302

@

SUB

CONT

J

p>

303

_

RV302

(A)

PHASE

L303

RV301

©

ican}

[RF

AND

AGC

ADJUSTMENT

1.

Adjust

with

IF201

(VIF

PACK)

so

as

to

disappear

snow

noise

and

cross-modulation.

2.

Confirm

them

at

every

channel.

COMB

TYPE

FILTER

ADJUSTMENT

(RV301,

L303)

|

1.

Set

at

TV

mode

and

receive

color-bar

signal.

2.

Connect

an

oscilloscope

to

the

Y

signal

output

of

the

comb

type

filter

(the

emitter

of

Q367),

and

adjust

RV301

(GAIN)

and

L303

(PHASE)

taking

tracking,

so

as

the

chroma

component

of

the

waveform

to

becomes

minimum.

(Fig.

5-1)

Fig.

5-1

14.3

MHz

f.

ADJUSTMENT

(CV316)

1.

Receive

color-bar

signal.

2.

HUE

VOLUME

cerreresereree

50%

(Resetting)

PICTURE

VOLUME

«+

70%.

RV201

1F201

MPX

LEVEL

3.

Connect

@

of

IC301

to

GND

through

via

10

k

Q

resistor.

4.

Short

pins

®

and

@

of

IC301.

5.

Observe

@

of

IC301

with

an

oscilloscope,

and

confirm

that

the

color

signal

is

out

of

synchronization.

6.

Turn

CV316

to

make

color

synchronization.

[SUB-CONTRAST

ADJUSTMENT

(RV302)

|

1.

Receive

color-bar

signal.

2.

PICTURE

«+

MAX

COLOR

errr

rr

MIN

3.

Connect

an

oscilloscope

©

of

NM301.

4.

Adjust

to

2.1

*83

Vp-p

with

RV302

(SUB

CONT)

as

shown

in

Fig.

5-2.

WHITE

Fig.

5-2

CAUTION

:

Measurement

should

be

performed

under

the

conditions

that

connector

and

not

applying

ABL.

removing

A-16

HUE

ADJUSTMENT

AND

ACC

ADJUSTMENT

(RV303,

304)

1.

Receive

color-bar

signal.

Di

HUE

Mone

tee

ee

RESET

COLOR

«+

RESET

PICTURE

«+»

MAX

3.

Observe

©

of

NM301

with

an

oscilloscope,

and

adjust

the

output

waveform

so

as

to

become

that

as

shown

in

the

diagram

by

turning

the

ACC

volume

(RV304)

and

Hue

volume

(RV303).

Make

levels

of

©

and

@

even,

@

and

©.

©

to

@

have

a

little

residual

tilt.

4.

Confirm

that

the

voltage

@

of

IC301

at

the

middle

point

of

the

ACC

volume

(RV304)

should

be

less

than

9

V.

5.

Confirm

that

the

blue

output

©

of

NM301

should

be

2.1

£0.1

V

after

adjusted.

CAUTION

:

Measurement

should

be

performed

under

the

conditions

that

removing

A-16

connector

and

not

applying

ABL.

NEW

DYNAMIC

COLOR

ADJUSTMENT

(RV305,

RV306,

RV307)

1.

Recive

color-bar

signal.

DON.

De

Co

cecereeceeeteseteere

ees

Blue

ON

state

PICTURE

button

crc

MIN

BRIGHTNESS

crrrertttteee

50%

(restting)

3.

Watch

the

potential

at

©

(G.

DC)

and

(B.

DC)

of

NM301

to

the

pedestal

at

®

(R.

DC-1)

of

NM301

with

RV305

and

RV306,

and

adjust

so

that

the

input

level

off-set

becomes

disappear.

4.

Apply

6.0

V

DC

to

@

(SUB

BRT)

of

A-16

connector,

and

adjust

the

pedestal

levels

@®

(R.

DC-1)

and

@

(R.

DC-2)

of

NM301

so

as

to

they

become

the

same

level

with

RV307.

5.

Switch

the

New.

Dynamic

Color

at

green

and

red,

and

confirm

that

there

have

been

no

differences

in

adjustments.

|

MPX

LEVEL

ADJUSTMENT

(RV201)

1.

Receive

400

Hz

(100%

modulation)

sound

signal.

2.

Connect

an

RMS

meter

to

@

of

MM201.

3.

Adjust

RV201

so

that

the

MPX

level

is

247.5

+7.0

mVrms.

Re

Oe

SUB

VOL

ADJUSTMENT

(RV101)

1.

Receive

1.0

kHz

(230

mVrms)

2.

VOLUME

button

cree

MAX

3.

Adjust

RV101

(SUB

VOL)

so

that

the

@®

and

@

of

IC802

output

level

is

700

+50

mVrms.

4,

At

this

time,

confirm

the

speaker

output

level

(pin

@

of

A-11

connector

and

@

of

A-10

is

above

7.40

Vrms.

sound

signal.

connector)

[INDICATOR

POSITION

ADJUSTMENT

(T1101)

1.

Receive

a

color-bar

signal.

2.

PICTURE

button

ser

MAX

BRIGHTNESS

button

+;

50%

3.

Adjust

T101

as

shown

in

Fig.

5-3.

ll

eth

Ce

4

nd

®

)6,

and

scomes

f

A-16

®

301

so

3V307.

ad

red,

»xrences

signal.

201.

247.5

7.0

mVrms

jnal.

®

0

+50

it

level

f

A-10

5-2.

D

BOARD

ADJUSTMENTS

D

board

—Compenent

side—

a)

RV1711

V.

FREQ

(2)

IC1710

@

@)

@

RV1710

H.

FREQ

PHASE

ADJUSTMENT

(RV1561)

WIA

PITT

TM

AMP

ADJUSTMENT

(RV1560)

NK

(1)

[LOWER

ADJUSTMENT

(RV1563)

|

LW)

JIL

UPPER

ADJUSTMENT

(RV1564)

|

ih

mit

KV-27SX

KV-27S

Pas

R

M-

—

o

a

wl

ol

AMP

RV1561

[PIN

PHASE

RV1562

|H.

SIZE

R1535

RV1563

[LOWER

nv15e4

(UPPER

PIN]

.

FREQ

ADJUSTMENT

(RV1710)

Connect

@

of

1C1710

to

@

through

1.0

kQ.

At

this

time,

be

sure

to

connect

@

of

IC302

on

the

A

board

to

12

V

through

10

k@.

Turn

the

‘horizontal

synchronizing

volume

(RV1710),

and

adjust

the

volume

so

as

to

flow

of

the

picture

becomes

as

shown

in

diagram.

Remove

the

1.0

k@

resistor

and

be

sure

to

confirm

the

horizontal

synchronization

is

normal

and

whether

picture

becomes

out

of

order

when

channel

is

switched

or

not.

W/7-

|

SS

fo:

too

low

fo

:

suitable

fo:

too

high

fo

=15.734

kHz

+60

Hz

.

FREQ

ADJUSTMENT

(RV1711)

|

VIDEO

Mode

(no-signal).

Connect

frequency

counter

across

@

of

1C1710

and

ground.

Adjust

RV1711

for

55.0

+0.5

Hz

on

the

frequency

counter.

PICTURE

BLANKING

CONFIRMATION

(US.

Model

Only)

The

following

adjustments

should

always

be

performed

when

replecing

the

following

components.

Regarding

components

of

*R1704.

IC301,

PM1700,

D1543,

R1552,

R1704,

R1705,

R1713,

R1716,

R1637,

R1700,

R339,

R340

1.

Turn

the

POWER

switch

ON,

and

receive

monoscope

signal.

2.

Set

the

PICTURE

button

into

80%

and

the

BRIGHTNESS

button

into

DETENT.

3.

Apply

DC

voltage

16.00

7899

to

the

TP85

Via

1T40

from

the

DC

stavilized

power

source.

4.

Confirm

that

the

picture

is

blanked

till

+B

voltage

is

more

than

121.0

V

DC.

5.

Confirm

that

the

picture

is

not

blanked

when

INPUT

voltage

is

more

than

96

V

AC.

[V.

SIZE

CONFIRMATION

|

The

following

adjustments

should

always

be

performed

when

replecing

the

following

components.

Regarding

components

of

*R1538

CV.

SIZE).

DY,

C1539,

C1548,

1C1710,

T1701,

RV1540,

R1538,

R1539,

R1546,

Ri671,

R1672,

R1732

1.

Turn

the

POWER

switch

ON,

and

receive

monoscope

signal.

2.

Set

the

PICTURE

button

into

80%

and

the

BRIGHTNESS

button

in

to

DETENT.

3.

Adjust

RV1540

(V.SIZE)

so

that

the

V.SIZE

becomes

minimum,

and

confim

that

the

raster

size

is

275

cm

or

more.

[H.

SIZE

CONFIRMATION

The

following

adjustments

should

always

be

performed

when

replecing

the

following

components.

Regarding

components

of

*R1535

(H.

SIZE).

DY,

RV1562,

T1701,

C1506,

C1507,

C1509, C1510,

R1535,

R1577,

R1570,

R1576

1.

Turn

the

POWER

switch

ON,

and_

receive

monoscope

signal.

2.

Set

the

PICTURE

button

into

80%

and

the

BRIGHTNESS

button

into

DETENT.

3.

Confirm

that

the

H.SIZE

at

minimum

should

not

exceed

16.9

frames

by

adjusting

RV1562

CH.

SIZE).

SECTION

6

|

KV-27SXR10

_

KV-27SXR10

|

-755

RM-755

DIAGRAMS

-——

|

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BAND

SW,

VIF,

SIF

Mit

[cosTonEs)

Mo

ess

sounot

Ms

Ue

A

|

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CHROMA,

AUDIO

OUT

[ANT

QW]

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LED

DISPLAY

[DETECTOR]

PLL

CONTROLLER

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Sony Trinitron KV-27SXR10 User manual

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