Sony Trinitron PVM-1271Q Service Manual

SERVICE

MANUAL

US

Chassis No.

Model

SCC-611A-A

October,

Color system

Picture

Picture

Resolution

Resolution

Color

Color

1984

PAL, SECAM,
switched

tube

tube

Trinitron tube

Approx. 33

tion,

(Approx.

RGB

temperature

temperature PVM-1271Q:

Composite input : 550

PVM-1371QM;

(Can be

an

or

Sony

Frequency response

Horizontal linearity ±8%

Horizontal linearity

Vertical

Vertical

Line

Line

Overscan of the

linearity ±5%

linearity

pull range

pull range

10

5.5.MHZ

Horizontal

Vertical s Hz

picture

5%

Underscan of

the picture

9%

Return loss

Zooming

Convergence

Brightness

4 MHz, 35 dB

Within 2%

Central area 0.6 mm

Periphery 0.8

More than 35

NTSC and NTSC4

automatically

cm

inches), 90

Super Fine Pitch 0.25

inputs : 600 lines,

internal switch. For

temperature, consult your

dealer.)

MHz

(13

31 cm picture

9,300'’K

6,500OK

changed

(-3

(-3

to

dB, RGB)

composite video)

dB,

measured diagonally)

640

lines

either

switching of the

+500 Hz

(LINE A,

LINE

mm

foot-lamberts

SPECIFICATIONS

systems,

43

deflec-

degree

mm

x

dots

200

temperature by

authorized

B)

col-

Outputs

Power requirements

Power consumption

Dimensions

Weight

Canadian

Chassis

VIDEO IN

VTR

6

:

composite

75 ohms

AUDIO

VTR :

5

;

-5

EXT

composite sync

75

RGB IN

0.7

AUDIO

-5

CMPTR :

For details, see

VIDEO

AUDIO

Output

EXT SYNC

RGB

AUDIO (RGB)

Loop-through

PVM-1

PVM-1371QM:

PVM-1271Q:

PVM-1371QM; 90 W

Approx.

Approx.

BNC connector

:

8-pin connector,

:

ground)

1 Vp-p

high

and

minijack

IN :

connector.

8-pin

ground)

dBs,

SYNC IN

ohms

Vp-p, ±6 dB,

dBs, high

high

and

: BNC

(RGB)

25-pin'

impedance

: BNC

high

connector

IN :

impedance

OUT : BNC

OUT

mini

;

level 1 W

OUT :

BNC

OUT :

OUT :

1

271

:

20

Q

105 W

x

346

330

X13X

(13^8

14.5 kg

75

connector

“CMPTR

connector

220

(31

US

Pin No.

+6

dB,

impedance

Pin No.

connector

2-8

Vp-p,

impedance

ohms,

jack

mini

connector

jack

connector

BNC

mini jack

50/60

V ac,

-

240 V ac,

x

387 mm

15>/4

15 oz)

lb

Model

Model

No.

SCC-585A-A

(pin

2

negative,/

sync

switchat/

(pin

1

negative,

switchable

composite

non

connector”

Hz

50/60

(w/h/d)

inches)

No.

1/

I

Hz

^

i

/

IK

MICROFILM

COLOR

TRINITRON®

VIDEO

MONITOR

CMPTR

connector

Pin

assignment

Pin

No

*

1

2

3

4

5

6

7

8

9*

Pin

No.

10

11

12

13

14

^

7

15-24

*

25

*

Examples

^'^'''\^Pin

Microcomputer^\

(25-pin)

Signal

iBM

select

H.

sync

Blue

input

Green

input

.

Red

input

--12

V

power

-k

5 V

power

Analog/digital

RGB/NORMAL

^

bX 1

/IN 1

mode

Ground

BM

luminance

for

microcomputer

No.

or

composite

1

supply

sync

1

supply

mode

select

mode

select

switch

signal

connections

sync

9

Signal

level

Highs*ate(5V):

Low

state

High

state

Negative

When

the

1

V

p-p, 75-ohm

When

the

TTL

level

Positive

When

the

When

the

Digitai

0.3

A

max

0.6

A

max

High

state

Low

state

Signal

level

High

state

ow

state

Negative

TTL

level

Low

During

®

state

the

compos.te

the

signai

High

state

Low

state

Positive

When
When

polarity

the
the

high

low

25

: 3 Bit

(5

polarity

high

iow

polarity

high

low

signal

(open)

(ground)

V

(5

(ground)

polarity

V

(5

(ground)

low

v,deo

from

-5

dB

(open)

; Sync

state

state

IBM

TTL

V

or

open)

state

is

terminated

state

is

state

is

state

is

(TTL

level)

;

Analog

:

Digital

or

open)

:

Composite

or

open)

:

Composite

state,

the

Signal

the

microcomouter

O/.

100

(

: Sync

signal

is

selected

is

selected

mode

: Audio

;

Audio

'0

selected

selected

selected

selected

:

from

modulation),

input

signal

signal

: RGB

Video

video

the

signal

at

inputs

inputs

video

signal

LINE

input

from

at

at

inputs

inputs

at

pin

at

pin

9

at nin g

terminated,

pin

9

(0.7 V

fnLJe^

from

video

inputs

from

input

from

A

input

from

the

LINE

pin

1 :

pin

1

; Low

from

pin

from

9

•

non

p-p)

a

microcomputer

from

a

microcomputer

from

the

microcomputer

VIDEO

impedance

the

CMPTR

A

VIDEO

TTL

ievel

state

13.

the

sync)

the

the

IN

connector

(oroundl

LINE

A

LINE

LINE

A

more

connector

IN

connector

AUDIO

A

VIDEO

only

VIDEO

is

blanked

is

supSposS

uKCMniposeo

than

47

k

IN jack

IN

connector

IN

connector

ohms

and

the

over

over

—

i

I

the

High

Low

given

course

and

if

—

High

state

Low

state

Low

is

true

of

our

design

We

clarification

would

state

state

state

at

the

company's

might

on

time

ask

any

SMC-70/SMC-70G

iBM

computer

TTL

3BIT

computer

While

the

duction

ment

dicated

appointed

information

changes

through

in

the

Sony

in

research

specifications.

dealer

iBM

Low

of

printing,

not

necessariiy

you

to

point

luminance

state

policy

of

check

is

required.

signal

small

improve-

be

with

vour

-

pro-

in-

—

2

SAFETY CHECK-OUT

PVM-12710\

After correcting

the original

service problem,

perform the following safety checks before

the set

1

.

2.

3.

4.

5. Look

the customer:

to

the

Check

poorly-soldered

board

Check the interboard

wires are “pinched”

resistors.

area of your repair for unsoldered

connections. Check

surface for solder splashes and bridges.

to ensure that no

wiring

or contact

Check that all control knobs,

ground straps, and

been replaced.

have replaced all the

Look for

ticularly transistors, that

previous repair. Point them out to

and

obvious

to the customer

unauthorized replacement

recommend their replacement.

for

parts which, though functioning,

of

signs

mounting hardware

Be absolutely certain

insulators.

were installed during

deterioration. Point them out

recommend their replace-

and

high-wattage

shields,

the customer

ment.

6. Check the line

cord for

Recommend the replacement

cord to the customer.

7. Check the

(if any).

condition of the monopole

Make sure the end

the plastic

impalement on

customer,

replacement.

Check the

8.

values

are

accurate; be suspicious of your HV

if

sets always have

Check

9.

“metallized”

exposed metal

leakage

cap on it. Point

and recommend

B+ and HV to see they

specified. Make sure your

the

antenna

knobs,

parts

as described below.

a

cracks and abrasion.

of any

broken off,

is not

out

the

broken antenna to the

the

instruments

low HV.

terminals, metal trim,

screws, and

for

leakage. Check

AC

releasing

the entire

covers,

have

that you

parts, par-

show

such line

antenna

and has

danger of

antenna’s

are

the

at

meter

other

all

or

LEAKAGE

The

earth ground

exposed metal

not exceed 0.5 mA

current can be

TEST

leakage

AC

and from all exposed

from any exposed

part having

(500

measured

metal parts

return

a

to chassis,

microampers).

any one of three

by

metal

part

to

any

must

Leakage

to

methods.

1 . A commercial leakage tester,

Simpson

manufacturers’ instructions

or RCA WT-540A.

229

to use these

such as

Follow the

the

instru-

ments.

2. A battery-operated

Precision

this

a

3. Measuring

means

meter.

245 digital multimeter

job.

the voltage drop

of a

The

analog meters

voltage

scale. The

SH-63Trd are

is suitable.

multimeters

suitable. (See Fig.

HOW

TO FIND

A cold-water

cover-plate

also

at earth

used

as your

by measuring

water pipe

zero

ohms. If

connect

lamp) between

retaining

the hot

normal

(See

brilliance

Fig.

a 60—100

screw.

side of

B)

A

pipe is guaranteed

retaining

ground.

earth-^ound,

the resistance

with

an ohmmeter.

a cold-water

the

Try

the

if

AC

milliammeter.

across

or battery-operated

VOM

“limit” indication

must have

an accurate

Simpson

examples of

Nearly

all battery operated

that have

a

a 2V

passive

A)

GOOD

screw on

EARTH

earth

most

AC outlet

If the retaining

verify

that it

between

The reading

pipe

is not

watts

trouble light

hot

side

of

the

receptacle

both slots, if necessary,

line, the

the screw

lamp should

is at ground

The Data

is suitable

a resistor

is 0.75

for

by

AC'volt-

V, so

low-

250 and Sanwa

VOM

that

digital

AC range are

GROUND

ground; the

boxes

screw

is to be

is at ground

it and

a cold-

should be

accessible,

(not a

neon

and the

to locate

light at

potential.

is

To Exposed Meta!

Parts

on Set

pF

0.1

5

Earth

\Fig.

A. Using

an AC voltmeter to

Ground

check AC

AC

voltmeter

10.75

V)

leakage.

-3

PVM-1271Q

/

Section

1. GENERAL

1-

-1

1

Features

.

1-2.

Precautions

2-

1-3.

Location of

1-4.

Function of Controls

System

5.

2-

2. DISASSEMBLY

3-

1. Cabinet

2-2.

B

Board

2-3.

Chassis

2-4.

F board

2-5.

F board

6. Picture

3.

ADJUSTMENTS

1. Setup

3-1-1.
3-1-2.

3-1-3.

3-1-4.

3-2.

Safety

Tube

Adjustments

Beam

Convergence

Focus

White

Related

Controls

Connections

Ass’y

Removal

Removal

Ass’y

Removal

Removal

Removal

Removal

Landing

Balance

Adjustments

(

(2)

1

Title

)

TABLE

.-

Page

12

12

13

14
14

15

16
16
17

17

18

20

OF

CONTENTS

5

5

6

7
9

Section

i

3-3.

3-3-1

3-3-2.
3-3-3.

4.

DIAGRAMS

4-1.
4-2.

4-3.

4-

4-4.

4-5.

5-

6.

6.

5.

EXPLODED

1.

5-2.
5-3.

Circuit

Block

Circuit

D Board

.

B

Q

Adjustments

Board

Board

Diagram

Boards

Waveforms

Schematic

Printed

Diagram

Wiring

B Board

D Board

Board

Q

H Board

Board

Cl
C2 Board

F

and

F2

Boards

Semiconductors

VIEWS

Cabinet

Bezel

Chassis

Title

Adjustments

Adjustments

Adjustments

Locating

Boards

Page

23
23

27

31

35
38

39

43

51

51,

52
54

55

56

57
58
59

60

61

62

SAFETY-RELATED

COMPONENTS

ON

A

VIEWS

SAFE

WITH

THE

AND

OPERATION.

SONY

AS SHOWN

PUBLISHED

THAT ARE

IDENTIFIED

CEDURES

WHENEVER

REPLACED

IDENTIFIED

SCHEMATIC

IN THE

PARTS

IN

THIS

BY

CRITICAL

IN

THIS

OR

IMPROPER

COMPONENT

PARTS

REPLACE

WHOSE

MANUAL

SONY.

MANUAL.

CRITICAL

BY

SHADING

DIAGRAMS,

LIST

THESE

PART

OR

CIRCUIT

TO

SAFE

FOLLOW

OPERATION

WARNING

AND MARK

ARE

EXPLODED

CRITICAL

COMPONENTS

NUMBERS

IN

APPEAR

SUPPLEMENTS

ADJUSTMENTS

OPERATION

THESE PRO-

COMPONENTS

IS SUSPECTED.

!!

ARE

TO

ARE

ELECTRICAL

ATTENTION

LES

COMPOSANTS

PAR

UNE

LES

VUES

SONT

D'UNE

SECURITE

PLACER

NUMERO

MANUEL

SONY.

TANCE

LES

MARQUE

EXPLOSEES

DU

QUE

PAR

DE

PIECE

OU

DANS

REGLAGES

EST

CRITIQUE

AUX

IMPORTANCE

FONCTIONNEMENT

PRESENT

DE

CRITIQUES,

MENT

MANUEL.

CHAQUE

EST

SUSPECTE.

REMPLACEMENT

OU

PARTS

LIST

COMPOSANTS

SECURITEI!

IDENTIFIES

SUR

A

LES

ET

PAR

SCHEMAS

LES

CRITIQUE

FONCTIONNEMENT.

DES

COMPOSANTS

EST

INDIQUE

DES

SUPPLEMENTS

DE

CIRCUIT

POUR

SONT

SUIVRE

LORSQU'UN

IDENTIFIES

CES

PROCEDURES

MAUVAIS

RELATIFS

UNE

LISTES

NE LES

SONY DONT

DANS LE

PUBLIES

DONT

LA

SECURITE

DE

COMPOSANTS

FONCTIONNE-

A

LA

TRAME

ET

DE PRINCIPE,

DE

PIECES

POUR

LA

REM-

LE

PRESENT

PAR

L'lMPOR-

DU

DANS

LE

LORS

!

i

-

4

-

PVM-1271Q

^

1-1.

FEATURES

High-resolution

Super Fine

The

ture grill) gives

RGB ; 650

to 2000

up

displayed

Analog/digital RGB input

Analog RGB

the RGB

fed to

connectors),

picture

Pitch Trinitron

high resolution

lines) picture. When

characters

with great clarity.

and digital (TTL

input connectors

which allows a

mation system such as

monitor.

Receives 4 TV

monitor can receive

This

signals. The

automatically.

broadcasting standards

appropriate broadcasting standard is

Colorpure Filter

When NTSC video

tivates to

fine picture

increase the

signals are received, a

detail without color

Underscan mode

The signal normally

monitored

Automatic

in the underscan mode.

frequency control

The incoming

to fast or slow,

set

the jitter from a

mode,

monitored.

Superimposition of a

from video

ture

When

SMI-7073

video

ture

ture

Sony SMC-70

a

superimposer

disc player are used

from the microcomputer
from the video

scanned outside of

sync timing error

according to the input

picture from a

equipment

equipment.

picture tube

(0.25

(composite: 550

used as a

characters/line

(80

level) RGB input

(BNC

microcomputer or

teletext, to be connected to

character display,

x

25 lines) can be

signals can be

25-pin multi

and

type

a

PAL, SECAM, NTSC and NTSC

colorpure filter ac-

resolution about

spill or color noise.

resulting in

35%,

the screen can be

compensation speed can be

signal. In the slow

video tape

recorder can

microcomputer on a pic-

or SMC-70G

and video

together

can be

microcomputer, an

equipment such as a

with this monitor, a pic-

superimposed on a pic-

SECTION

GENERAL

aper-

mm

lines,

data infor-

this

443

selected

easily

be

1

1-2.

PRECAUTIONS

On safety

Check that

•

the voltage

with

Should

•

unplug the

before operating

Unplug the unit from

•

for several days.

To disconnect

•

Never pull the

the operating voltage

of your local power

any liquid

unit and have it checked by

or solid object fall

it any further.

the ac

cord itself.

On installation

Allow adequate

•

build-up.

Do not place

materials

near

tilation holes.

install the unit in a

Do not

•

radiators or

as

sunlight, excessive dust,

air circulation to

the unit

(curtains, draperies) that may block the ven-

air ducts, or in a place subject to

On cleaning

keep the unit

To

with

cloth lightly

use

soft cloth.

a

strong solvents

cleansers since these

precaution, unplug

looking brand-new,

Stubborn

dampened with a mild detergent solution.

such

the unit before cleaning

On repacking

Do not throw away

an ideal

make

shipping the

on the carton.

If

have any

you

authorized Sony

the

container in which to transport the unit.

another location, repack it

unit to

questions about

dealer.

of your unit

supply.

qualified

the wall outlet if it is not to

power cord, pull it out by

prevent internal

into

is

identical

the

cabinet,

personnel

be used

the plug.

heat

on surfaces (rugs, blankets, etc.) or

location near heat sources such

direct

mechanical

stains may

vibration

periodically clean it

be

shock.

or

removed with a

Never

as

thinner

will damage the cabinet. As

carton and packing materials. They

or benzine, or abrasive

a safety

it.

When

illustrated

as

this unit, contact your

*

NTSC443 system signal is

An

video tapes with a

this system.

using an optional MB-502

By

video

tape

1271Q/1371QM can

optional SLR-102

An

rack.

mounting details, see the

For

obtained

recorder/player

mounting bracket, the PVM-

mounted in an EIA

be

slide rail

manual.

playing back

by

specially designed tor use with

NTSC-recorded

standard 19-inch

is also available.

appropriate instruction

PVM-1271Q

1-4.

FUNCTION

FRONT

O

Press

is

O

Sync

the

ternal

composite

When

the

O

Select the AFC

FAST :

SLOW:

O

Normal

setting

for normal

which does

reduces

PANEL

SECAM

distorted.

SYNC

AFC (automatic

SCAN

button

this button

select

may be

EXT SYNC

sync is

video

composite video

select

SYNC

incoming

Normaily, set

incoming

screen.

This

VTR.

MODE select switch

scanning or

the SCAN

of

scanning,

not appear

the

OF CONTROLS

when

The picture

switch

supplied

IN connector

suppiied,

input, set

switch

operation

mode is used

picture from

a

will become

from an

on the rear

with either a

the SYNC

supplied with no

is

iNT.

to

frequency

sync

this

sync

under scanning is

control)

in the fast

timing errors are

switch

timing errors are

to

MODE select

UNDER for viewing a

or

to

in normal

display size by about

SECAM color

clear.

external sync

PANEL.

composite

select

external sync,

switch

mode or slow

compensated

position.

this

to

displayed

monitor the

achieved by

switch. Set to

scanning.

9%.

Under scanning

sources

generator to

When an ex-

or non-

switch

to

mode.

on the

jitter from a

proper

NORMAL

picture

EXT.

set

for.

BRIGHT (brightness)

O

Adjusts the

center detent

PICTURE

0

Adjusts

simultaneously

POWER switch and

0

turn the monitor

To

dicator will

again.

Color system

0

Indicate the color

Input indicators

0

Illuminate to indicate

Input select

0

Press

A : for

LINE
LINE B : for a

the

select the

to

brightness.

position.

control

contrast,

in the

on, depress the POWER

light. To turn

indicators

system of the input video signal.

buttons

program

signal from the

a

signal from the LINE B

VTR : for a signal from

RGB

; for a

CMPTR

signal from

: for a signal

control

Normally set this control

color

intensity

proper ratio.

indicator

the monitor off, press the switch

the input select button pressed.

monitored.

to be

and

switch.

brightness

LINE A connectors.

connectors.

the

the

from the 25-pin

VTR connector.

8-pin

R, G and

B connectors.

CMPTR connector.

at

the

The in-

V HOLD

O

picture rolls

If the

VOLUME

O

Turn this

desired volume.

the

control

HUE

O

control is

This

or NTSC

tones.

greenish

purplish.

O

Adjusts

makes
makes

Clockwise

COLOR

the

it

443

;

the color

paler.

(vertical

control

control

counterclockwise

control

picture more vivid

hold) control

vertically,

clockwise

effective only for

system. Use

rotation makes

intensity of the

correct it with

or counterclockwise

playing tapes

obtain the most

to

skin tones

the

rotation

;

makes them

picture.

counterclockwise

Clockwise

this control.

obtain

to

of the

natural

rotation

rotation

NTSC

skin

more
more

\

-7-

PVM-1271Q

PANEL

REAR

A

LINE

O

groups (A

Two

posite video

connectors.

put

monitor

To

A or

LINE

connector

or a

IN

to

color

VIDEO

Connect

VTR

connect to

VIDEO

the

AUDIO

Connect

a

tion,

OUT

Loop-through

input

video

jack

IN

to the

suitable

connect to

AUDIO

video

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