Sharp Linytron C-1004G Bedienungsanleitung

SHARP

SERVICE

MANUAL

SERVICE-ANLEITUNG

?

SERVICE

HANDBOK

|

Ef fl

Linyteon

PAL

SYSTEM

COLOUR

TELEVISION

PAL

SYSTEM

FARBFERNSEHGERAT

FARG-TV

MED

PAL-SYSTEM

MODELS

/MODELL.

C-1004G,S,N

ELECTRICAL

SPECIFICATIONS

Aerial

Input...

2.

ee

75

ohm

unbalanced

Power

[nputic-es

ood.

6

Sek

nes

ae

ah

220

volts

AC

50

Hz

Convergence

........

cee

eee

Self

Converging

System

12

volts

DC

FOGUS:

<<.

sseehclecehun

woety

Bb

ee

Bi-potential

electrostatic

Power

Consumption

..........00

50584

e

ae

42

Watt

(at

AC)

Audio

Power

Output

Rating

..........005

0.6

Watt

(max.)

37

Watt

(at

DC

12V)

Intermediate

Freqnencies

Speaker

Size/

:

Picture

IF

Carrier

Freqnency

..............

38.9

MHz

Voice

Coil

Impedance

..........

4

x

8cm

(8

ohm

at

400

Hz)

Sound

IF

Carrier

Freqnency

............24.

33.4

MHz

Sweep

Deflection...

2...

0...

ee

ee ee

ees

Magnetic

Colour

Sub-Carrier

Frequency

.......

40.4

MHz

(Nominal)

Tuning

Range.

..........

00200

VHF-Channels

2

thru

12

UHF-Channels

21

thru

69

TECHNISCHE

DATEN

Antenneneingangsimpedanz.........

75

Ohm

unausgeglichen

Stromversorgung

..

1...

6

ee ee

ee

220

Volt

Netzstrom

50

Hz

Konvergenz

..

2...

0...

ee

eee

Selbstkonvergierendes

System

42

Volt

Gteichstrom

Strahienbiindelung

..........--

Bi-potential

elektrostatishc

Leistungsaufnahme.

..........06.%

42

Watt

(bei

Netzstrom)

Tonausgangsleistung

..

2...

2

ee

es

0,6

Watt

{max.)

37

Watt

(bei

Gleichstrom)

Zwischenfrequenzen

Lautsprechergr68/

Bildzwischentragerfrequenz

........-.-..200%

38,9

MHz

Lautsprecherspulenimpedanz.....

4

x

8

cm

(8

Ohm

bei

400:Hz)

Tonzwischentragerfrequenz....

2.1...

2

eee

33,4

MHz

Abtastausschlag.

.

2...

ee

es

Magnetisch

Farbuntertragerfrequenz

......:...

40,4

MHz

(nominal)

Abstimmbereich

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

002004

VHF

Kanile

2

bis

12

UHF

Kandle

21

bis

69

ELEKTRISKA

SPECIFIKATIONER

Antenninmatning.

.......002

2.220

75

ohm

obalancerad

Kraft

ineffekt.........0.0.,

BA

th

Segla

SR

B68,

MS

220

V

AC

50Hz

Konvergens

........020

08005

Sjalvkonvergerande

System

12V

DC

FOKUS:

hse

i

veces

oh

a

eh

Dubbelpotentiell

Elektrostatisk

Kraftférbrukning.

2.2...

ee

eee

42

Watt

(vid

AC)

Audio

Kraftuteffekt

varde

..........-.45

0,6

Watt

(max)

:

37

Watt

(vid

DC)

Mellanliggande

frekvenser

Hégtalares

storlek/

Bild

IF

Barvagsfrekvens

.......-.-.-..000-

38,9

MHz

Réstspole

impedans

..........

4

x

8

cm

(8

ohm

vid

400

Hz)

Ljud

IF

Barvagsfrekvens

..

2...

ee

eee

33,4

MHz

Avs6kningsavbéjning....

2...

.

eee

ee

Magnetisk

Farg

Underbarvagsfrekvens

.........

40,4

MHz

(Nominell)

_

Avstamningsomrade

.......-...-

VHF

kanaler

2

genom

12

UHF

kanaler

21

genom

69

C-1004G,S,N

Page

ELECTRICAL

SPECIFICATIONS

.........0.0..

1

CHASSIS

LAYOUT

DIAGRAM

.............

IMPORTANT

SERVICE

NOTES..........-.05.

3

PRINTED

WIRING

BOARD

ASSEMBLIES......

DESCRIPTION

OF

NEW

CIRCUIT

.............

4

SCHEMATIC

DIAGRAMS

AND

WAVEFORMS...

ADJUSTMENT

1.2.2...

0

cee

eee

ee

eee

7

REPLACEMENT

PARTS

LIST

..............

TROUBLE

SHOOTING

TABLE

............-.---

12

INHALT

Seite

TCHNISCHE

DATEN

.......

20:

ee

eee

ee

eee

i]

CHSISANORDNUNGSPLAN

...........

so

A

WICHTIGE

SERVICE-ANMERKUNGEN

.........

20

LEITERPLATTENEINHEITEN

.............

BESCHREIBUNG

DER

NEUEN

KREISES

........

21

SCHEMATISCHER

SCHALTPLAN

UND

EINSTELLUNGEN...

2...

00...

eee

ee

eee

24

WELLENFORMEN.........

00+.

e

eae

FEHLERSUCHTABELLE

............225

eee

29

ERSATZTEILLISTE...

2...

cc

ee

INNEHALL

Sid

ELEKTRISKA

SPECIFIKATIONER

............

1

FELSOKNINGSCHEMA

..........0

00+

eee

OBSERVERA

VID

SERVICEATGARD

..........

37

CHASSIPLANRITNING

........

000

eeu

eee

BESKRIVNING

AV

NYA

KRETSAR

...........

38

KRETSKORT

MED

KOPPLINGSSCHEMA......

JUSTERINGAR

..

0...

0.

cee

ee

eee

es

41

PRINCIPSCHEMAN

OCH

FREKVENSKURVOR.

.

RESERVDELSBETECKNING

..........000.

WARNING

The

chassis

in

this

receiver

is

partially

hot.

Use

an

isolation

transformer

between

the

line

cord

plug

and

power

receptacle,

when

servicing

this

chassis.

To

prevent

electric

shock,

do

not

remove

cover.

No

user

—

serviceable

parts

inside.

Refer

servicing

to

qualified

service

personnel.

WARNUNG

Das

Chassis

dieses

Empfangsgerites

steht

teilweise

unter

hohen

Spannungen.

Bei

Wartungsarbeiten

an

diesem

Chassis

mu

deshalb

ein

Isolationstransformator

zwischen

dem

Netzkabelstecker

und

der

Steck-

dose

verwendet

werden.

Um

elektrische

Schlage

zu

vermeiden,

darf

das

Abdeckgehduse

nicht

entfernt

werden.

Im

Inneren

des

Gerites

befinden

sich

keine

vom

Benutzer

einstellbaren

Teile.

Wartung

und

Reparaturarbeiten

miissen

qualifiziertem

Service-Personal

tiberlassen

werden.

VARNING

Chassiytan

ar

delvis

het.

Anvand

alltsa

en

isoleringstransformator

mellan

vaxelstr6mskontakten

och

strémingangen

nar

nagot

servicearbete

skall

utféras

pa

chassit.

Ta

inte

bort

chassiomhéljet

fér

fara

av

elektriska

sttar.

Forsék

aldrig

att

sjalv

utfGra

nagra

serviceatgarder

inne

i

apparaten

utan

vand

till

kvalificerad

personal.

Sid

IMPORTANT

SERVICE

NOTES

Maintenance

and

repair

of

this

receiver

should

be

done

by

qualified

service

personnel

only.

SERVICING

OF

HIGH

VOLTAGE

SYSTEM

AND

PICTURE

TUBE

When

servicing

the

high

voltage

system,

remove

static

charge

from

it

by

connecting

a

10k

ohm

Resistor

in

series

with

an

insulated

wire

(such

as

a

test

probe)

between

picture

tube

dag

and

2nd

anode

lead.

(AC

line

cord

should

be

disconnected

from

AC

outlet.)

1.

Picture

tube

in

this

receiver

employs

integral

implosion

protection.

2.

Replace

with tube

of

the

same

type

number

for

continu-

ed

safety.

3.

Do

not

lift

picture

tube

by

the

neck.

4.

Handle

the

picture

tube

only

when

wearing

shatter-proof

goggles

and

after

discharging

the

high

voltage

com-

pletely.

X-RAY

This

receiver

is

designed

so

that

any

X-ray

radiation

is

kept

to

an

absolute

minimum.

Since

certain

malfunctions

or

servicing

may

produce

potentially

hazardous

radiation

with

prolonged

exposure

at

close

range,

the

following

pre-

cautions

should

be

observed:

1.

When

repairing

the

circuit,

be

sure

not

to

increase

the

high

voltage

to

more

than

24.5kV,

(at

beam

470uA)

for

the

set.

.

To

keep

the

set

in

a

normal

operation,

be

sure

to

make

it

function

on

18.0kV

+

2.0kV

(at

beam

470yA)

in

the

case

of

the

set.

The

set

has

been

factory

-

adjusted

to

the

above-mentioned

high

voltage.

’.

If

there

is

a

possibility

that

the

high

voltage

fluctuates

as

a

result

of

the

repairs,

never

forget

to

check

for

such

high

voltage

after

the

work.

.

Do

not

substitute

a

picture

tube

with

unauthorized

types

and/or

brands

which

may

cause

excess

X-ray

radiation.

BEFORE

RETURNING

THE

RECEIVER

Before

returning

the

receiver

to

the

user,

perform

the

following

safety

checks.

1.

Inspect

all

lead

dress

to

make

certain

that

leads

are

not

pinched

or

that

hardware

is

not

lodged

between

the

chassis

and

other

metal

parts

in

the

receiver.

.

Inspect

all

protective

devices

such

as

non-metallic

con-

trol

knobs,

insulating

fishpapers,

cabinet

backs,

adjust-

ment

and

compartment

covers

or

shields,

isolation

resistor-capacity

networks,

mechanical

insulators

etc.

I

DESCRIPTION

OF

NEW

CIRCUIT

DC-DC

Inverter

Circuit

This

model

is

provided

with

a

DC-DC

inverter

circuit

so

that

it

can

be

used

outdoors

operating

on

the

automobile

battery

(12V

DC).

AC

operation

and

DC

operation

are

changed

from

each

other

automatically

by

using

the

AC

or

DC

power

cord

to

connect

it

to

the

set.

,

The

DC-DC

inverter

circuit

ensures

not

only

to

amplify

the

output

voltage

but

also

to

regulate

the

input

voltage

against

its

fluctuation.

Fig.

1

is

a

block

diagram

of

the

DC-DC

inverter

circuit.

The

square-wave

signal

which

has

been

caused

by

the

hori-

zontal

oscillator

circuit

(IC501)

is

first

applied

to

the

integ-

ration

circuit

where

it

is

converted

to

a

sawtooth-wave

signal

to

be

fed

to

the

pulse-width

converter

circuit.

In

the

pulse-width

converter

circuit,

the

sawtooth-wave

signal

is

again

converted

into

a

square-wave

signal

then

entering

the

inverter

drive

circuit

where

it

is

amplified

enough

to

drive

the

inverter

output

circuit.

The

output

voltage

from

the

inverter

output

circuit

is

set

to

+115V

DC,

and

it

is

applied

to

the

error

detection

circuit

where

it

is

compared

with

the

reference

voltage

to

control

the

pulse-width

converter

circuit.

Fig.

2

shows

what

parts

the

inverter

circuit

is

composed

of

and

Fig.

3

reveals

the

waveforms

of

the

voltages

which

are

available

at

the

points

@

to

®

in

Fig.

2.

Coming

from

the

horizontal

oscillator

circuit,

the

square-

wave

voltage

appears

at

the

point

@)

and

is

integrated

by

R779

and

C775

so

that

it

is

converted

into

a

triangular-

wave

voltage

as

shown

in

Fig.

3-(B).

The

triangular-wave

voltage

is

applied

to

the

base

of

Q2:

this

transistor

Q2

is

biased

to

turn

on

only

with

the

voltage

which

is

lower

than

the

level

indicated

by

the

chained

line

in

Fig.

3-(B).

Now

that

the

triangular-wave

voltage

shown

-

by

the

solid

line

in

Fig.

3-(C)

is

applied

to

the

base

of

Q2,

the

transistor

Q2

turns

on

only

when

it

is

given

the

voltage

Integra-

tion

circuit

indicated

by

the

shaded

area

in

Fig.

3-(B):

as

the

result,

at

the

point

©

in

Fig.

2

there

appears

the

voltage

having

the

waveform

indicated

by

the

solid

line

in

Fig.

3-(C).

Then

the

voltage

is

sent

to

Q3

where

its

waveform

is

in-

verted

to

be

the

one

shown

in

Fig.

3-(D).

The

transistor

Q3

is

to

activate

the

drive

transformer

T770.

Actually

when

Q3

turns

off,

T771

is

allowed

to

turn

on

to

get

the

output

transistor

Q770

in

operation;

the

voltage

caused

at

the

point

©

in

Fig.

2

(at

the

base

of

Q770)

has

the

waveform

as

shown

in

Fig.

3-(E).

The

voltage

at

the

collector

of

Q770

has

the

waveform

as

shown

in

Fig.

3-(F)

while

the

current

there

of

has

the

waveform

as

shown

in

Fig.

3-(G).

The

output

voltage

from

the

inverter

transformer

is

applied

to

D775

where

it

is

rectified

as

long

as

Q770

is

turned

off:

that

is

to

say,

when

Q770

is

turned

on,

the

magnetic

energy

-

at

T771

increases

so

that

the

output

voltage

from

D775

also

increases.

The

rectified

output

voltage

is

then

sent

to

the

succeeding

load

circuit.

However,

a

part

of

it

is

fed

back

to

Q1

and

then

to

Q2

via

ZD1

to

control

biasing

of

Q2.

Now

suppose

that

there

is

a

rise

of

the

output

voltage

of

the

transformer

due

to

some

reasons

(e.g.

due

to

an

increase

of

input

DC

voltage

or

an

alleviation

of

the

output

load).

Then

the

current

at

the

base

of

Q1

increases

with

its

collector’s

current

also

increasing.

Therefore

the

voltage

at

the

base

of

Q2

decreases

and

this

means

that

the

turn-on

time

of

Q2

becomes

longer

than

before:

the

output

wave-

form

then

caused

refers

to

that

indicated

by

the

brokin

line

in

Fig.

3B).

The

output

waveforms

available

thereafter

are

those

indicated

by

the

broken

lines

in

Fig.

3-(C),

-(D),

4E),

-(F)

and

(G):

this

fact

is

to

shorten

the

turn-

on

time

of

Q770

so

as

to

decrease

the

magnetic

energy

charged

in

T771.

As

the

result,

the

output

voltage

from

T771

which

has

been

higher

than

specified

is

now

decreased

to

its

normal

level.

Pulse

width

Inverter

converter

drive

output

circuit

Error

detector

circuit

'

OUT

DC

115V

___g

1C501

1XO065CE

+12V

DC

IN-PUT

Z0103CE

1771

rc

:

1770

1X0248CE

0000000

L771

+

C776

Voltage

waveform

at

point

@

ov

Voltage

waveform

at

point

®

2

turn-on

level

Figure

2.

+115V

DC

OUT-PUT

Voltage

waveform

at

point

©

Voltage

waveform

at

point

©

Voltage

‘waveform

at

point®

”°

Voltage

waveform

at

point

©

Current

waveform

at

2

collector

of

Q770

eee

Serene

Lage

ro

eats

Be

Figure

3.

C780

|

epee

|

The

DC-DC

inverter

circuit

has

two

built-in

functions

for

its

safer

operation,

which

are

described

below.

(i)

Overload

preventive

function

After

passing

through

F770,

the

supply

voltage

(12V

DC)

is

separated

into

three

currents

i,,

i,

and

i;.

the

current

i

is

applied

to

the

output

transistor

Q770

to

make

it

ready

to

be

in

operation.

The

current

i,

is

sent

via

R651

to

@)

of

IC5O1

so

that

1501

is

in

operation

the

output

of

which

appears

at

the

point

@):

at

the

same

time,

the

transistor

Q2

turns

on

to

cause

an

output

signal

at

its

collector.

Further

the

current

i;

is

applied

via

C774

to

the

primary

side

of

T770

the

output

of

which

is

instantly

impressed

onto

the

base

of

Q770.

With

Q770

turned

on,

there

is

an

instant

output

of

DC

voltage

between

pins

@)

and

(5)

of

T771

which

is

applied

to

D775

for

the

rectification.

At

the

same

time,

there

is

also

an

instant

output

of

DC

voltage

bet-

ween

pins

and

@)

of

T771

and

is

fed

to

D770

for

the

rectification.

The

output

current

from

D770

is

separated

into

two

currents

i,

and

is:

the

former

is

sent

via

D773

and

R651

to

IC5O1,

and

the

latter

to

Q3.

Usually

the

rectification

DC

output

from

D770

is

about

18V,

and

since

it

is

higher

than

the

power

supply

voltage

(about

12

V),

the

voltage

at

the

cathode

of

D772

becomes

higher

than

its

anode

so

that

this

diode

D772

turns

off.

However,

if

there

occurs

an

overload

at

the

output

circuit

(due

to

its

shortcircuit,

for

example),

no

voltage

is

generated

between

pins

and

(6)

of

T771

so

that

the

inverter

circuit

gets

in

a

stop

automatically:

at

the

time,

however,

the

oscillator

circuit

[501

is

still

in

operation

since

it

is

given

i,

from

D772.

When

the

inverter

circuit

is

stopped

in

this

way,

first

turn

off

the

power

switch

to

discharge

C774,

and

about

10

second

thereafter,

turn

on

the

power

switch

again

to

cause

the

inverter

circuit

to

restart.

(ii)

Input

reverse-connection

preventive

function

The

diode

D771

is

connected

in

parallel

to

the

power

supply

circuit

(12V

DC):

actually,

the

cathode

and

anode

of

the

former

are

connected

respectively

to

the

plus

(+)

terminal

and

minus

(—)

terminal

of

the

latter.

With

this

design,

the

diode

is

usually

kept

turned

off

as

far

as

the

input

connection

of

the

car

battery

cord

is

made

in

a

proper

way.

But

if

the

input

connection

with

reverse

polarity

is

made

as

shown

in

Fig.

4,

D771

turns

on

and

F770

is

shorted

to

be

blown

out.

With

F770

blown

out,

the

inverter

circuit

gets

in

a

stop

not

suffering

any

further

trouble.

Figure

5

shows

the

other

way

of

connection

in

which

a

diode

is

connected

in

series

to

the

power

supply

circuit

(12V

DC).

With

this

design,

the

diode

turns

off,

with

the

fuse

being

not

blown

out,

if

the

reverse

connection

of

the

car

battery

cord

is

performed.

With

the

diode

turned

off,

the

inverter

circuit

stops

its

operation

thus

suffering

no

fur-

ther

trouble.

__

However,

this

design

has

such

a

drawback

that

the

diode

is

kept

turned

on

as

long

as

the

set

is

normally

operating:

this

refers

to

the

power

consumption

of

about

4.5W

needed

for

the

diode

to

operate.

To

vaoid

this

unnecessary

power

consumption,

this

set

employs

the

protective

circuit

shown

in

Fig.

4

instead

of

that

shown

in

Fig.

5.

Inverter

circuit

Figure

4.

Inverter

circuit

Figure

5.

ADJUSTMENT

COLOUR

PURITY

ADJUSTMENT

For

best

results,

it

is

recommended

that

the

purity

adjust-

ment

be

made

in

final

receiver

location.

If

the

receiver

will

be

moved,

perform

this

adjustment

with

it

facing

east.

The

receiver

must

have

been

operating

15

minutes

prior

to

this

procedure

and

the

faceplate

of

the

CRT

must

be

at

room

temperature.

The

receiver

is

equipped

with

an

automatic

degaussing

circuit.

However,

if

the

CRT

shadow

mask

has

become

excessively

magnetized,

it

may

be

necessary

to

degauss

it

with

manual

coil.

Do

not

switch

the

coil

OFF

while

the

raster

shows

any

effect

from

the

coil.

The

following

procedure

is

recommended

while

using

a

Dot

Generator.

1.

Check

for

correct

location

of

all

neck

components.

(See

Figure

6.)

2.

Rough-in

the

static

convergence

at

the

center

of

the

CRT,

as

explained

in

the

static

convergence

procedure.

3.

Rotate

the

picture

control

to

centre

of

its

rotation

range

and

rotate

Brightness

control

to

maximum

CW

position.

4.

To

obtain

a

blank

raster,

connect

a

short

clip

lead

be-

tween

2

of

IC801

and

earth.

Then,

rotate

screen

control

CW

until

normal

raster

is

obtained.

5.

Rotate

the

Red

Bias

and

Blue

Bias

controls

to

maximum

CCW

position

Rotate

the

Green

bias

control

sufficiently

in

a

CW

direction

to

produce

a

green

raster.

6.

Loosen

the

deflection

yoke

tilt

adjustment

wedges

(three),

loosen

the

deflection

yoke

clamp

screw

and

push

the

deflection

yoke

as

close

as

possible

to

the

CRT

screen.

7,

Begin

the

following

adjustment

with

the

tabs

on

the

round

purity

magnet

rings

set

together,

initially

move

the

tabs

on

the

round

purity

magnet

rings

to

the

side

of

the

CRT

neck.

Then,

slowly

separate

the

two

tabs

while

_

at

the

same

time

rotating

them

to

adjust

for

a

uniform

green

vertical

band

at

the

centre

of

the

CRT

screen.

8.

Carefully

slide

the

deflection

yoke

backward

to

achieve

green

purity

(uniform

green

screen).

NOTE:

Center

purity

was

obtained

by

adjusting

the

tabs

on

the

round

purity

magnet

rings,

outer

edge

purity

was

obtained

by

sliding

the

deflection

yoke

forward.

Tighten

the

deflection

yoke

clamp

screw.

9,

Check

for

red

and

blue

field

purity

by

reducing

the

output

of

the

Green

Bias

control

and

alternately

in-

creasing

output

of

Red

and

Blue

Bias

controls

and

touch

up

adjustments,

if

required.

10.

Disconnect

between

@2

of

IC801

and

earth,

if

connect

in

connect

in

step

4.

11.

Perform

BLACK

AND

WHITE

TRACKING

procedure.

STATIC

(CENTER)

CONVERGENCE

ADJUSTMENT

1.

Switch

the

Receiver

ON

and

allow

it

to

warm

up

for

15

minutes.

2.

Connect

the

output

of

a

Crosshatch

Generator

to

the

Receiver

and,

concentrating

on

the

centre

of

the

CRT

screen,

proceed

as

follows:

a.

Locate

the

pair

of

4

pole

magnet

rings.

Rotate

indi-

vidual

rings

(change

spacing

between

tabs)

to

con-

verge

the

vertical

red

and

blue

lines.

Rotate

the

pair

of

rings

(maintaining

spacing

between

tabs)

to

converge

the

horizontal

red

and

blue

lines.

b.

After

completing

red

and

blue

centre

convergence,

locate

the

pair

of

6

pole

magnet

rings.

Rotate

indi-

vidual

rings

(change

spacing

between

tabs)

to

con-

verge

the

vertical

red

and

blue

(magenta)

and

green

lines.

Rotate

the

pair

of

rings

(maintaining

spacing

between

tabs)

to

converge

the

horizontal

red

and

blue

(magenta)

and

green

lines.

DEFLECTION

YOKE

PURITY

MAGNETS

CLAMP

SCREW

6

POLE

CONV.

MAGNETS

L,

POLE

CONV,

MAGNETS

L

DEFLECTION

YOKE

TILT

ADJUSTMENT

WEDGE

|

DEFLECTION

YOKE

TAPE

Figure

6.

Picture

Tube

Neck

Components

Location

DYNAMIC

CONVERGENCE

ADJUSTMENT

Dynamic

convergence

(convergence

of

the

three

colour

fields

at

the

edges

of

the

CRT

screen)

is

accomplished

by

proper

insertion

and

positioning

of

three

rubber

wedges

between

the

edge

of

the

deflection

yoke

and

the

funnel

of

the

CRT.

This

is

accomplished

in

the

following

manner.

1.

Switch

receiver

ON

and

allow

it

to

warm

up

for

15

minutes.

2.

Apply

crosshatch

pattern

from

Dot/Bar

Generator

to

receiver.

Observe

spacing

between

lines

around

edges

of

CRT

screen.

3.

Tilt

the

deflection

yoke

up

and

down,

and

insert

tilt

adjustment

wedges

@)

and

@)

between

the

deflection

yoke

and

the

CRT

until

the

mis-convergence

illustrated

in

Fig.

7

@

has

been

corrected.

4.

Tilt

the

deflection

yoke

right

and

left,

and

insert

tilt

adjustment

wedge

(3)

between

the

deflection

yoke

and

the

CRT

until

the

mis-convergence

illustrated

in

Fig.

7

®

has

been

corrected.

5.

Alternately

change

spacing

between,

and

depth

of

in-

sertion

of, the

three

wedges

until

proper

dynamic

con-

vergence

is

obtained.

6.

Use

a

strong

adhesive

tape

to

firmly

secure

each

of

the

three

rubber

wedges

to

the

funnel

of

the

CRT.

7.

Check

purity

and

readjust,

if

necessary.

DEFLECTION

YOKE

REAR

VIEW

Figure

7.

Dynamic

Convergence

Adjustment

(1)

Receive

broadcast

signal

through

extenal

antenna.

TP601

«

tp6e02

«

©

Figure

8.

(1)

Short

TP601

and

TP602.

(2)

Adjust

R607

to

have

almost

proper

horizontal

sync.

(3)

Remove

the

shorting

of

TP601

and

TP602.

|

(1)

Receive

broadcast

signal

through

external

antenna.

LLL.

LLL

SL

LLL

Figure

9.

(1)

Fig.

9

(A):

If

the

black

horizontal

line

moves

down

slowly,

turn

V-hold

knob

counterclockwise

to

have

a

proper

sync.

Fig.

9

(B):

If

several

horizontal

lines

appear

at

random,

turn

V-hold

knob

clockwise

to

have

a

proper

sync.

(1)

Connect

pattern

generator

(PM5508)

to

the

unit.

(2)

Set

antenna

input

to

about

70

dB.

(3)

Set

the

pattern

to

“GRAY

SCALE”.

Contrast:

MAX

Brightness:

Set

it

so

that

the

black/

gray

scale

becomes

easy

to

see.

*Tuner

AGC:

Approx.

4V

Figure

10.

(1)

Turning

RF-AGC

(R209)

clockwise

will

produce

noise

in

picture,

(2)

Turning

RF-AGC

(R209)

counterclockwise

will

remove

such

noise;

but

the

picture,

then,

moves

a

little

to

right

and

its

brightness

somewhat

lessens.

Then,

for

proper

adjustment:

Turn

RF-AGC

fully

clockwise

to

produce

noise,

turn

it

back

gently

to

remove

the

noise

and

stop

just

at

a

point

where

no

phenomenon

such

as

(2)

arises.

No.

Where

to

adjust

Setting

Adjustme

nt

4

Chroma

(I)

(1)

Connect

pattern

generator

(1)

Set

the

pattern

to

“MATRIX”.

(PM5508)

to

the

unit,

and

(2)

Adjust

T801

to

obtain

uniform

set

antenna

input

to

about

brightness

—

the

same

-

for

every

70

dB

scanning

line.

(2)

Contrast:

MAX

(3)

Set

the

pattern

to

“DELAY”.

Brightness:

MIN

(4)

Adjust

R804

to

obtain

uniform

Color:

about

1/2

brightness

—

the

same

for

every

scanning

line.

(5)

Set

the

pattern

to

“PHASE”

Adjust

T802

to

have

—

the

same

color

shading

in

both

upper

and

lower

parts

of

picture.

Figure

11.

5

Picture

tube

(1)

Connect

pattern

generator

(1)

Short

TP401

and

TP402.

(PM5508)

to

the

unit.

(2)

Set

the

pattern

to

“GRAY

SCALE”

(3)

Contrast:

MAX

Brightness:

MAX

cut-off

adjust

9

1404

ce

‘

[_]icso1

TP403

TP401

e

|

1C201

TP402

TUNER

FBT

Figure

12.

R863

R857

(B-Drive)

(G-Drive)

R853

(R-Bias)

R854

(G-Bias)

R865

(B-Bias)

Figure

13.

(2)

Short

TP403

and

TP404.

(3)

Set

G-drive

control

(R357)

and

B-drive

control

(R863)

to

abour

“1/2”.

(4)

Turn

R-bias

control

(R853)

G-bias

control

R859)

and

B-bias

control

(R865)

counterclockwise

to

their

maximum

extent.

(5)

Turn

screen

control

(R626),

from

its

minimum

position,

slowly

clockwise

to

make

a

slight

horizontal

line

come

into

existence,

and

stop

it.

(6)

Adjust

the

R853,

R859

and

R865

separately

to

make

that

horizontal

line

equally

colored

for

every

color.

(R,

G

and

B).

However,

if

the

color

appearing

at

first

is,

for

instance,

red

never

touch

the

R853

but

only

the

R859

and

R865

—

the

same

holds

true

for

the

colors

green

and

blue

when

they

appear

at

first.

(7)

Turn

the

screen

control

V.R

clockwise

to

vanish

the

horizontal

line,

and

stop.

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