Sharp DV-5465S Manuale utente

UDV-94090

|

DV-5470S

SHARP

_

SERVICE

MANUAL

SEGTDV5465S//

PAL/SECAM

SYSTEM

COLOUR

TELEVISION

4BS-B

Chassis

DV-5465S

mores

DV-5470S_

In

the

interests

of

user-safety

(Required

by

safety

regulations

in

some

countries)

the

set

should

be

restored

to

its

original

condition

and

only

parts

identical

to

those

specified

should

be

used.

CONTENS

e

ELECTRICAL

SPECIFICATIONS

.......:ceseeeeseeees

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PRINTED

WIRING

BOARD

ASSEMBLIES

¢

IMPORTANT

SERVICE

NOTES

........cceseeeereees

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SCHEMATIC

DIAGRAM

AND

©

SERVICE

ADJUSTMENT

.......:sssccssssssessscessaaees

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¢

SOLID STATE

DEVICE

BASE

DIAGRAM

........

*

BLOCK

DIAGRAM

#

CHASSIS

LAYOUT

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REPLACEMENT

PARTS

LIST

POUR

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SHARP

CORPORATION

_

UV-394090

DV-5470S

ELECTRICAL

SPECIFICATIONS

Power

INPUt

.........ceceesessssneanes

220—240

V

AC

50

Hz

Intermediate

Frequencies

Power

COMSUMPTiON

.........ceesesersssssessseresereaes

60

Wh

e

Picture

IF

Frequency

.........cesesessssesessens

38.9

MHz

e

Sound

IF

Carrier

Frequency

.....

33.16/33.4

MHz

Audio

Power

Output

Rating

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

4W

{MPO}

x2

e

Colour

Sub-Carrier

Frequency

.........

34.47

MHz

SPEAKS

ys

oececeeusceceasitsinaavrawecaceen

10

cm

Round

x2

pes

(Nominal)

Voice

Coil

Impedance

............06.

8

ohms

at

600

Hz

Aerial

Input

Impedance

CONVEFGeNCe

.......cserersene

Self

Converging

System

MIME

ceccsecteactseceoncdceteees

75

ohm

Unbalanced

FOCUS

<i

is\ssnasssaciauleoninnttecs

Bi-Potential

Electrostatic

Tuning

Ranges

..........

48.25

MHz

thru

855.25

MHz

Sweep

Deflection

...........ccecsscecsecseesssseee

Magnetic

CATV

Special

Channels

Specifications

are

subject

to

change

without

prior

notice.

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.

VV-o40900

|

DV-5470S

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

10

k

ohm

Resistor

in

series

with

an

insulated

wire

(such

as

a

test

probe)

between

picture

tube

ground

tag

and

high

voltage

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

continued

safety.

3.

Do

not

lift

picture

tube

by

the

neck.

4

.

Handle

the

picture

tube

only

when

wearing

shatterproof

goggles

and

after

discharging

the

high

voltage

completely.

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

precautions

should

be

observed:

1.

When

repairing

the

circuit,

be

sure

not

to

increase

the

high

voltage

to

more

than

30.0

kV,

(at

beam

0

1A)

for

the

set.

2.

To

keep

the

set

in

a

normal

operation,

be

sure

to

make

it

function

on

25.5

kV

+

1.5

kV

{at

beam

1100

A)

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.

3.

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.

2.

Inspect

all

protective

devices

such

as

non-metallic

control

knobs,

insulating

fchpapers:

cabinet

backs,

adjustment

and

compartment

covers

or

shields,

isolation

resistor-capacity

networks,

mechanical

insulators

etc.

UDV-34090

DV-5470S

SERVICE

ADJUSTMENT

M@

PIF/SIF/AGC/G2

Adjustment

1.

Trap

Adjustment

Adjusting

Point

O]

11201:

Trap

coil:

(Adj.-P

Trap)

|

1.

Connect

sweep

generator

output

to

IF

in

(FA

(1)).

2.

Connect

response

cable

with

detector

to

collector

line

of

Q1200

(see

diagram).

To

Oscilloscope

GND

3.

Adjust

11201

(Adj.-P

Trap)

so

that

trap

is

(32.4

MHz).

{32.4

MHz)

Trap.

Adj.

P

T1201

2.

VCO

Adjustment

Adjusting

Point

OO

114202:

VCO

adjust

coil

ho

(FA)

in IF

unit.

e

Frequency:

38.9

MHz

(CW)

+

5

kHz

e

Level:

approx.

85

dB

3.

Adjust

T1202

so

that

voltage

at

(7)

(AFT.

output)

of

connector

(FA)

in

IF

unit

is

2.5

+0.2V.

To

Coffector

of

.

7:

Qi200.

.

Apply

DC

2.5V

to

(25)

of

1C1200

(PIF-AGC).

.

Feed

the

following

signal

to

(1)

of

connector

3.

Separation

Adjustment

Adjusting

Point

C1

R1219:

Separation

control

1.

Receive

the

following

signal

from

IGR

stereo

signal

generator.

¢

Video

Signal:

Colour

bar

(875%

mod.)

e

Stereo

Mode:

L

(unmodulated}

‘R

(400

Hz

modulated):

=

Wake

sure

the

unit

is

in

the

stereo

mode

with

OSD

(On-Screen

Display)

on.

2,

Terminate

(3)

(audio

L

output)

of

21-pin

connector

with

10

kQ

impedance.

Adjust

separation

control

(R1219)

until

400

Hz

output

waveform

becomes

minimum.

4.

RF

AGC

Adjustment

Adjusting

Point

{]

R1216:

RF

AGC

contro!

1.

Receive

“COLOUR

BAR”

signal.

*

signal

strength:

53

dB

(terminated

with

75Q)

2.

Connect

DC

voltmeter

to

Test

Point

TP1200

(RF

AGC).

3.

Set

AGC

control

(R1216)

to

maximum

position

(memory).

4.

Adjust

R1216

to

obtain

voltage

of

0.1

V

below

maximum

voltage

(step

3).

_

5,

G2

Adjustment

1.

Receive

“MONOSCOPE

PATTERN”

signal.

2.

Connect

DC

voltmeter

with Test

probe

attenuator

(+

1000)

to

G2

on

PWB-B.

3.

Adjust

Screen

control

to

obtain

700

V

on

G2.

6.

Focus

Adjustment

—

1.

Receive

"MONOSCOPE

PATTERN"

sgnal

2.

Adjust

Focus

control

to

have

best

focus

at

the

central

area

of

CRT

screen.

7.

110

V

Adjustment

1.

Receive

"MONOSCOPE

PATTERN"

signal.

2.

Connect

DC

voltmeter

to

TP700.

3.

Adjust

the

R755

until

the

TP700

voltage

becomes

100V+0.5V.

|

DVv-54708___

M

SERVICE

MODE

FUNCTION

|

This

mode

function

is

provided

to

assist

with

the

settings

of

those

adjustments

that

may

vary

from

one

Picture

Tube

to

another,

or

between

models.

In

order

to

use

the

Service

Mode

ConnectTest

Pattern

signal

to

antenna

terminal.

.

Press

main

switch

to

off.

.

Press

1

V

and

CH

A

buttons

and

main

switch

to

on

simultaneously.

.

—SERVICE

SOFTWARE—

will

appear

on

screen.

RWNo

The

required

adjustments

can

then

be

made

from

the

Remote

Control

Unit.

The

only

buttons

required

are

the

following:

A

CH

V

for

movement

in

adjustment

options

menu;

A

4

V

are

used

to

carry

out

an

adjustment

in

said

menu;

ON/OFF

is

used

to

memorize

a

new

adjustment.

Adjustment

menu

is

as

follows:

—

SERVICE

SOFTWARE

—

CROMA-LUMA

DELAY

—

VERT.

SHIFT

—

HOR.

SHIFT

—

VERT.

BREATHING

—

VERT.

AMPLITUDE

—

§-CORRECTION

—

RED

REFERENCE

—

GREEN

REFERENCE

—

BLUE

REFERENCE

—

ALTER

NVM

POS

00

—

ALTER

NVM

VAL

00

—

AUTO

INSTALLATION

—

OPC

VALUE

(DV-54705

only)

Having

finalized

adjustments,

to

exit

service

mode,

press

main

switch

to

off.

Adjustment

Note:

The

procedure

for

making

adjustments

to

Vertical

Corrections

is

as

follows:

—

Adjust

S-CORRECTION

—

Adjust

VERT.

SHIFT

—

Adjust

VERT.

AMPLITUDE

DV-5465S

DV:5470S

M@

GEOMETRY

atamiabae

led

PROCEDURE

CHROMA-LUMA

DELAY

a)

Receive

Philips

pattern

signal.

b)

When

volume-up

button

is

pressed,

[uma

phase

delays.

c)

When

volume-down

button

is

pressed,

chroma

phase

delays.

d)

Adjust

the

Chroma-Luma

delay.

.

we

VERT.

SHIFT

a)

Receive

Philips

pattern

signal.

b)

When

volume-down

button

is

pressed,

picture

moves

up.

c)

When

volume-up

button

is

pressed,

picture

moves

down.

d}

Adjust

the

Vertical

location

to

obtain

picture

centering

(fig.

1)...

HOR.

SHIFT

a)

Receive

Philips

pattern

signal.

b)

When

volume-up

button

is

pressed,

picture

moves

to

the

left.

c}

When

volume-down

button

is

pressed,

picture

moves

to

the

right.

d)

Adjust

the

horizontal

location

to

obtain

picture

centering

(fig.

2).

VERT.

AMPLITUDE

a)

Receive

Philips

pattern

signal.

b)

When

volume-up

button

is

pressed,

vertical

size

of

picture

increases.

c)

When

volume-down

button

is

pressed,

vertical

size

of

picture

decreases.

d)

Adjust

the

vertical

size

to

obtain

overscan

(fig.

3).

S-CORRECTION

a)

Receive

Philips

pattern

signal.

b})

When

volume-up

button

is

pressed,

upper

and

lower

scanning

decreases,

and

center

scanning

increases.

c)

When

voiume-down

button

is

pressed,

upper

and

lower

scanning

increases,

and

center

scanning

decreases.

d)

Adjust

the

S-correction

to

obtain

a

balance

between

upper,

lower

and

center

(fig.

4).

Fig.

1

Fig.

2

Fig.

3

Fig.

4

DV-946

The

following

adjustments

are

only

required

when

the

Picture

Tube

is

changed.

RED

REFERENCE

/

GREEN

REFERENCE

/

BLUE

REFERENCE

a)

Adjust

G2.

b)

Tune

in

white

pattern.

c)

Adjust

colour

to

minimum.

d)

Position

colourmeter

in

the

center

of

screen.

e)

Using

brightness

and

contrast

buttons,

select

a

luminance

of

=~

120

NITS.

f)

Operate

again

in

Service

Mode

and

select

location

RED

REFERENCE

/

GREEN

REFERENCE

/

BLUE

REFERENCE

to

obtain

colour

coordinates:

X

=

0.290

+

0.015

Y

=

0.284

+

0.015

g)

Exit

Service

Mode

and

check

colour

coordinates

‘X’

and

“Y’

at

20

and

120-NITS.

It

may

be

necessary

to

repeat

procedure.

NOTE:

Locations:

RED

REFERENCE

alter

‘X’

coordinate;

GREEN

REFERENCE

alter

the

‘Y’

coordinates;

BLUE

REFERENCE

alter

the

‘X’

and

‘Y’

coordinates.

ALTER

NVM

POS

XX XX

Assigned

value

Storage

Location

When

V

-4

A

buttons

are

pressed,

alter

Storage

Location.

ALTER

NVM

VAL

XX

Assigned

value

Storage

Location

When

V

-2

A

buttons

are

pressed,

alter

Assigned

value.

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DV-5470S

DNE5465S

DW:5470S

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——

DV-5465S

DV-54655

DV-5470S

CHASSIS

LAYOUT

851002

§1003

8100)

51004

MAIN

UNIT

DV-5470S

ONLY

VCJI/STEXT

IF/IGR

UNIT

i

CFi200

CF1201

CFi202

0

@

R1219

SEPARATION

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|

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R1216

CRT—UNIT

9

10

DV-5465S

DV-5470S

PRINTED

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Sharp DV-5465S Manuale utente

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