Sony TRINITRON KV-9400 Manuale utente

Television

System:

Color

System:

Picture

Tube:

Semiconductors:

Antennas:

Channel

Coverage:

Intermediate

Frequencies:

Sound

Syster

SPECIFICATIONS

American

standards

NTSC

cm,

(screen

measured

diagonally),

90°

deflection

TRINITRON

system

transistors,

FET,

ICs

and

diodes

VHF:

300

balanced

unbalanced

(telescopic

antenna)

(including

slide

switch)

UHF:

300

balanced

(loop

antenna*)

“Note:

Supplied

with

accessories

VHF

channels:

—13

UHF

channels:

—

total

preselected

channels)

Picture

i-f

carrier:

45.75

MHz

Color

subcarrier:

42.17

MHz

Sound

i-f

carrier:

41.25

MHz

4.5

MHz

intercarrier

Output

power:

(max.)

Speaker:

(3'/s

inches)

oval,

—

Continued

page

—

Model

Chassis

No.

SCC-274A-A

TRINITRON®

COLOR

WARNING

ISOLATION

TRANSFORMER

SHOULD

USED

DURING

ANY

SERVICE

AVOID

POSSIBLE

SHOCK

HAZARD,

BECAUSE

LIVE

CHASSIS.

THE

CHASSIS

THIS

RECEIVER

DIRECTLY

CON-

NECTED

THE

POWER

LINE.

SAFETY-RELATED

COMPONENT

WARNING

COMPONENTS

IDENTIFIED

SHADING

AND

MARK

THE

SCHEMATIC

DIAGRAMS,

EXPLODED

VIEWS

AND

THE

PARTS

LIST

ARE

CRITICAL

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

SHOWN

THIS

MANUAL

SUPPLEMENTS

PUBLISHED

SONY.

CIRCUIT

ADJUSTMENTS

THAT

ARE

CRITICAL

SAFE

OPERATION

ARE

IDENTIFIED

THIS

MANUAL.

THESE

PRO-

CEDURES

WHENEVER

CRITICAL

COMPONENTS

ARE

REPLACED

IMPROPER

OPERATION

SUSPECTED.

SONY.

SERVICE

MANUAL

KV-9400

SCC-274A-A

Video

System:

Automatic

Controls:

Anode

Voltage:

Power

Requirements:

Power

Consumption:

Dimensions:

Net Weight:

Accessories

Supplied:

cathode

drive

ABL

(automatic

brightness

limiter)

ACC

(automatic

color

control)

ACK

(automatic

color

killer)

ADG

(automatic

degaussing)

AFC

(automatic

frequency

control)

AFT

(automatic

fine

tuning)

AGC

(automatic

gain

contro!)

ANC

(automatic

noise

canceller)

AVR

(automatic

voltage

regulator)

zero

beam

current

120

ac,

60 Hz

(max.)

Wac

(average)

Approx.

267(w)

285(h)

333(d)

10%(w)

11%(h)

337/s

(d)

inches

Approx.

8.3

(18

oz)

Earphone

(ME-20B)

UHF

loop

antenna

(AN-15)

Label

indicator

Instruction

manual

KV-9400

SCC-274A-A

SAFETY

CHECK-OUT

After

correcting

the

original

service

problem,

perform

the

following

safety

checks

before

releasing

the

set

the

customer:

‘cs

Check

the

area

your

repair

for

unsoldered

poorly-soldered

connections.

Check

the

entire

board

surface

for

solder

splashes

and

bridges.

Check

the

interboard

wiring

ensure

that

wires

are

“pinched”

contact

high-wattage

resistors.

Check

that

all

control

knobs,

shields,

covers,

ground

straps,

and

mounting

hardware

have

been

replaced.

absolutely

certain

that

you

have

replaced

all

the

insulators.

Look

for

unauthorized

replacement

parts,

par-

ticularly

transistors,

that

were

installed

during

repair.

Point

them

out

the

customer

and

recommend

their

replacement.

Look

for

parts

which,

though

functioning,

show

obvious

signs

deterioration.

Point

them

out

the

customer

and

recommend

their

replace-

ment.

Check

the

line

cord

for

cracks

and

abrasion.

Recommend

the

replacement

any

such

line

cord

the

customer,

Check

the

condition

the

monopole

antenna

(if

any).

Make

sure

the

end

not

broken

off,

and

has

the

plastic

cap

it.

Point

out

the

danger

impalement

broken

antenna

the

customer,

and

recommend

the

antenna’s

replacement.

Check

the

B+

and

see

they

are

the

values

specified.

Make

sure

your

instruments

are

accurate;

suspicious

your

meter

sets

always

have

low

HV.

Check

the

antenna

terminals,

metal

trim,

“metallized”

knobs,

screws,

and

all

other

exposed

metal

parts

for

leakage.

Check

leakage

described

below.

LEAKAGE

TEST

The

leakage

from

any

exposed

metal

part

earth

ground

and

from

all

exposed

metal

parts

any

exposed

metal

part

having

return

chassis,

must

not

exceed

0.5mA

(500

microampers).

Leakage

current

can

measured

any

one

three

methods.

commercial

leakage

tester,

such

the

Simpson

229

RCA

WT-5S40A.

the

manufacturers’

instructions

use

these

instru-

ments.

battery-operated

milliammeter.

The

Data

Precision

245

digital

multimeter

suitable

for

this

job.

Measuring

the

voltage

drop

across

resistor

means

VOM

battery-operated

volt-

meter.

The

“limit”

indication

0.75V,

analog

meters

must

have

accurate

low-

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

passive

VOM

that

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

range

are

suitable,

(See

Fig.

HOW

FIND

GOOD

EARTH

GROUND

cold-water

pipe

guaranteed

earth

ground;

the

cover-plate

retaining

screw

most

outlet

boxes

also

earth

ground.

the

retaining

screw

used

your

earth-ground,

verify

that

ground

measuring

the

resistance

between

and

cold-

water

pipe

with

ohmmeter.

The

reading

should

zero

ohms.

cold-water

pipe

not

accessible,

connect

60—100

watts

trouble

light

(not

neon

lamp)

between

the

hot

side

the

receptacle

and

the

retaining

screw.

Try

both

slots,

necessary,

locate

the

hot

side

the

line,

the

lamp

should

light

normal

brilliance

the

screw

ground

potential.

(See

Fig.

Using

voltmeter

check

leakage.

Exposed

Metal

Parts

Set

0.15

1.5k2

voltmeter

(0.75V)

Earth

Ground

Trouble

Light

Ohmmeter

Outlet

Box

(a)

Cold-water

Pipe

Fig.

Checking

for

earth

ground.

=35

KV-9400

SCC-274A-A

CIRCUIT

BOARDS

LOCATION

scczvaa|

KV-9400

SCC-274A-A

SECTION

OUTLINE

1-1.

BLOCK

DIAGRAM

v902

(Picture

Yirin

‘i

coma

)

cnseuter

(TUNER)

;

BRIGHT

Tapa

Tape

[moor

(este

—1

aml

bei

Tse]

eunsr

care

[sane]

DENOD

Wie

Ane}

be[ineo

oer}

fvioco

@=[rrace

Tce

Aube

{

ane

poral

PYF

M8)

|vermeaarsmas

—

-12v

Lad

oie

PEEL

AS.

‘HUE

CONT,

roe.

boiz

overeat

ioe

ico11_cHSELECT

}

‘

BLK

DER,

DEF

‘AF

OUT,

POWER

surecy

“Hi8y

RECT

‘D510

iay

RECT

Dstt

~12v RECT

rave]

“0B

voay-a[

*2av

RECT

809

Meszsss

}+170v

—e]

*170V

RECT

3600V

REGT

D513

—

[H.

SaWoOTH

PRODUCE]

PuLse

sti

BEOT

DRIVE

‘REG

OUT

‘aso2

REG

REF

—5-

KV-9400

SCC-274A-A

KV-9400

SCC-274A-A

1-2,

CHANNEL

PRESETTING

Open

the

control

panel,

tuning

knob

Set

the

band

select

switch

one

the

three

color-coded

positions

corresponding

the

desired

channel

number.

Red:

channels

through

Yellow

channels

through

Blue:

channels

through

band

select

switch

Turn

the

tuning

knob

that

the

desired

station

properly

tuned

in.

AFT

switch

Press

the

desired

channel

select

button.

Es;

SECTION

DISASSEMBLY

2-1.

FILTER

REMOVAL

Remove

the

filter

the

direction

shown

the

arrow@.

Release

the

filter

the

direction

shown

the

arrow®

Push

the

slot

screw

driver

the

direction

shown

the

arrow@

Put

the

slot

screw

driver

the

hole

the

bottom

side.

2-2,

FOR

CHECKING

BOARD

Aboard

Release

the

board

from

the

bracket

the

direction

shown

the

arrow@.

Push

two

claws

the

bracket

the

direction

shown

the

arrow

—3—

2-3.

FOR

CHECKING

BOARD

KV-9400

SCC-274A-A

KV-9400

SCC-274A-A

Open

the

block

ass’y

the

direction

shown

the

arrow®.

Push

two

claws

the

stays

(right

and

left)

the

direction

shown

the

arrow

2-4.

FBT

CABLE

(HVR

BLOCK)

REMOVAL

Pull

out

the

cable.

REMOVAL

AND

INSTALLATION.

push

the

cable

and

turn

90°

INSTALLATION

Contirm

that

the

cable

ean

not

pulled

out.

2-5.

PICTURE

TUBE

REMOVAL

anode

cap

remover

(Parts

No,

3-702-436-01)

eK,

anode

cap

board

picture

tube

Insert

the

remover.

funnel

neck

assy

sure

short-circuit

the

anode

picture

tube

and

the

anode

cap

ground

after

removing

the

anode

cap.

deflection

yoke

four

tapping

screws

12)

block

ass’y

four

tapping

screws

20)

@one

tapping

screw

12)

one

tapping

screw

one

tapping

screw

Lug,

4mm

dia

Push

two

claws

stays

(right

and

left)

the

direction

shown

the

arrow@.

Open

the

block

ass’y

the

direction

shown

the

arrow@.

-10—

KV-9400

SCC-274A-A

KV-9400

SCC-274A-A

SECTION

SETUP

ADJUSTMENTS

(1)

The

following

adjustments

should

made

when

complete

realignment

required

ona

new

picture

tube

installed.

(2)

These

adjustment

should

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

Controls

and

switches

should

set

follows:

PICTURE

control

. .

.fully

clockwise

(maximum)

Make

the

following

adjustments

the

order

follows

given:

Beam

Landing

Convergence

White

Balance

Note:

Test

Equipment

Required.

Color-bar/Pattern

Generator

BRIGHT

control.

fully

leftwards

(maximum)

Degausser

AUTO,

AFT

switches

3-1.

BEAM

LANDING

machanical

center

Preparation:

Feed

the

white

pattern.

Before

starting,

degauss

the

entire

screen.

pate

neck

ass

Loosen

deflection

yoke

screw.

Set

purity

control

shown

Fig.

3-1.

. : 1

deflection

Slide

deflection

yoke

far

forward

will

go.

yoke

Position

neck

ass'y

shown

Fig.

3-2.

Fig.

3-2.

Disconnect

leads

and

the

board.

Adjust

purity

control

center

vertical

red

band

shown

Fig.

3-3.

Slide

deflection

yoke

back

for

uniform

red

screen.

Check

green

and

blue

rasters

for

uniformity

performing

the

same

way

steps

and

get

uniform

green

screen,

Fig.

3-3.

connect

lead

and

disconnect

leads

Purit)

[Disk

magnets

and

the

board.

tht

are

eee

get

uniform

blue

screen,

connect

lead

and

disconnect

leads

and

the

board.

After

these

checks,

connect

the

leads

and

Tighten

the

deflection

yoke

screw.

10.

Check

mislanding

appears

corners

a—d

shown

Fig.

3-4.

mislanding

observed,

“

aes

correct

shown

Fig.

3-4.

Darlection

yore

pel

eftonine

11.

Confirm

that

beam

landing

correct

when

the

receiver

faced

all

direction.

board

—M-

3-2.

CONVERGENCE

Preparation:

Before

starting,

perform

FOCUS

and

V.SIZE

adjustments.

Set

BRIGHT

control

fully

rightwards.

Feed

the

dot

pattern.

RV702_

DRIVE

RV704

DRIVE

RV701_

BKG

RV703

~G.

BKG-

RV705

BKG

RV706_

SCRN.

3-3.

WHITE

BALANCE

Feed

the

cross-hatch

pattern.

Turn

PICTURE

control

fully

counterclockwise,

and

set

BRIGHT

control

fully

rightwards.

Turn

RV702

(B.

DRIVE)

and

RV704

(G.

DRIVE)

fully

clockwise.

Set

RV701

(B.

BKG),

RV703

(G.

BKG),

and

RV705

(R.

BKG)

mechanical

center.

Turn

RV706

(SCRN

)

slowly

obtain

faint-

visible

cross-hatch.

Note

the

color

that

first

becomes

visible

turning

RV706.

not

turn

BKG

control

for

this

color.

(1)

Horizontal

and

Vertical

Static

Convergence

blue

dot

does

not

coincide

with

red

and

green

dots,

Move

BMC

magnet

(a)

correct

insufficient

static

convergence.

Rotate

BMC

magnet

(b)

correct

insufficient

static

convergence.

either

case,

repeat

Beam

Landing

Adjustment.

-12-

Adjust

the

other

two

BKG

controls

for

best

white

balance

(neutral

gray)

the

faint

cross-

hatch.

Turn

PICTURE

control

fully

clockwise,

and

set

BRIGHT

control

té

fully

leftwards.

Observe

the

screen

and

adjust

the

DRIVE

controls

for

best

white

balance.

Repeat

Steps

through

several

times.

(2)

Dynamic

Convergence

Adjustment

Preparation:

Before

starting,

perform

Horizontal

and

Vertical

Static

Convergence

Adjustment.

Loosen

deflection

yoke

screw.

Remove

deflection

yoke

spacers.

Move

the

deflection

yoke

for

best

convergence

shown

Fig.

3-5.

Tighten

the

deflection

yoke

screw.

Install

the

deflection

yoke

spacers.

SCC-274A-A

KV-9400

Note:

41,

SCC-274A-A

SECTION

CIRCUIT

ADJUSTMENTS

(1)

TEST

EQUIPMENT

REQUIRED

(5)

CIRCUIT

ADJUSTMENTS

Oscilloscope

Digital

multimeter

Adjustment

Boat

Page

Color-bar/pattern

generator

Variable

auto-transformer.

FOCUS

Isolation

transformer

SIF

Regurated-de

power

supply

AFT

(2)

INPUT

SIGNAL

SUB

BRT

When

making

these

adjustments,

feed

cross-

AGC

and

hatch,

color-bar

off-air

signal.

(3)

CONTROL

AND

SWITCH

SETTINGS

SUB

CONTRAST

Controls

and

switches

should

set

follows

ACC

when

making

checks

and

adjustments

unless

COLOR

SYNC

otherwise

noted.

PICTURE

contrl

HUE

control

BRIGre

ntror

Set

for

best

picture

GHECIGAFTERICEOL

and

COLOR

control-

RERLACED.

AUTO

switch

. .

.ON

R563

ADJUSTMENT

AFT

switch

.ON

(4)

These

adjustment

should

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

BOARD

ADJUSTMENT

FOCUS

Adjust

RV707

for

best

Focus.

-14—

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