Sony Trinitron PVM-1271Q Manual de usuario

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1

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IBM

IBM 6360 Instrucciones de instalación

PVM-1271Q

I

SERVICE

MANUAL

October,

1984

US

Model

Chassis

No.

SCC-611A-A

US

Model

Canadian

Model

Chassis

No.

SCC-585A-A

SPECIFICATIONS

Color

system

PAL,

SECAM,

NTSC

and

NTSC4.43

systems,

switched

automatically

Picture

tube

Trinitron

tube

Approx.

33

cm

(13

inches),

90

degree

deflec¬

tion,

Super

Fine

Pitch

6.25

mm

(Approx.

31

cm

picture

measured

diagonally)

Resolution

RGB

inputs

:

600

iines,

640

x

200

dots

Composite

input:

550

lines

Color

temperature

PVM-1271Q:

9,300°K

PVM-1371QM;

6,500OK

(Can

be

changed

to

either

temperature

by

an

internal

switch.

For

switching

of

the

col¬

or

temperature,

consult

your

authorized

Sony

dealer.)

Frequency

response

10

MHz

(-3

dB,

RGB)

5.5.MHZ

(-3

dB,

composite

video)

Horizontal

linearity

±8%

Verticai

iinearity

±5%

Line

pull

range

Horizontal

±500

Hz

Vertical

s

Hz

Overscan

of

the

picture

5%

Underscan

of

the

picture

Return

loss

Zooming

Convergence

4

MHz,

35

dB

(LINE

A,

LINE

B)

Within

2%

Central

area

0.6

mm

Periphery

0.8

mm

More

than

35

foot-lamberts

Inputs

p

VIDEO

IN:

BNC

connector

*-VTR

;

8-pin

connector,

Pin

No.

2

(pin

No.

.

6:

ground)

composite

1

Vp-p

+6

dB,

sync

negative,/

75

ohms

and

high

impedance

switchatf

p

AUDIO

IN:

minijack

■

-

VTR

:

8-pin

connector.

Pin

No.

1

(pin

1^

5:

ground)

-5dBs,

high

impedance

EXT

SYNC

IN:

BISC

connector

composite

sync

2-8

Vp-p,

negative,

75

ohms

and

high

impedance

switchable

RGB

IN

:

BNC

connector

0.7

Vp-p,

±6

dB,

75

ohms,

non

composite

AUDIO

(RGB)

IN

:

mini

jack

-5

dBs,

high

impedance

CMPTR:

25-pin

connector

For

details,

see

“CMPTR

connector”

Outputs

VIDEO

OUT:

BNC

connector

AUDIO

OUT:

mini

jack

Output

level

1

W

EXT

SYNC

OUT:

BNC

connector

RGB

OUT

:

BNC

connector

AUDIO

(RGB)

OUT:

mini

jack

Loop-through

Power

requirements

PVM-1271Q:

120

V

ac,

50/60

Hz

PVM-1371QM:

220

-

240

V

ac,

50/60

Hz

Power

consumption

PVM-1271Q:

105

W

PVM-1371QM:

90

W

Dimensions

Approx.

346

x

330

x

387

mm

(w/h/d)

(13V»

X

13

X

15‘/4

inches)

Weight

Approx.

14.5

kg

(31

lb

15

oz)

TRINITRON®

COLOR

VIDEO

MONITOR

1203

J

i

/

CMPTR

connector

(25-pin)

Pin

assignment

Pin

No

■

Signal

Signal

level

-

IBM

select

Highs*ate(5V):

IBM

mode

Low

state:

3

Bit

TTL

2

Audio

select

High

state

(5

V

or

open):

Audio

inputs

from

pin

13.

^

Low

state

(less

than

0.4

V):

Audio

inputs

from

the

LINE

A

AUDIO

IN

jack

3

H.

sync

or

composite

sync

Negative

polarity

-

When

the

high

state

is

selected

at

pin

9:

1

V

p-p,

75-ohm

terminated

When

the

low

state

is

selected

at

pin

9

■

m

level

4

Blue

input

Positive

polarity

When

the

high

state

is

selected

at

pin

9

•

5

6

7

Green

input

Red

input

12

V

power

supply

Analog

signal

(0.7

V

p-p,

75-ohm

terminated,

non

sync)

When

the

low

state

is

selected

at

pin

9:

Digital

signal

(TTL

level)

8

5

V

power

supply

0.6

A

max

-----

9*

Analog/digital

mode

select

High

state

(open):

Analog

signal

(0.7

V

p-p)

Low

state

(ground);

Digital

signal

(TTL

level)

Pin

No.

Signal

Signal

level

~

-

10

RGB/NORMAL

mode

select

High

state

(5

V

or

open):

RGB

inputs

from

a

microcomputer

Low

state

(ground):

Composite

video

inputs

from

the

LINE

A

VIDEO

IN

connector

11

V-sync

Negative

polarity

TTL

level

12

Blanking

High

state

(5

V

or

open):

Video

inputs

from

a

microcomputer

only

Low

state

(ground):

Composite

video

input

from

the

LINE

A

VIDEO

IN

connector

During

the

low

state,

the

video

signal

from

the

microcomputer

is

blanked

and

the

^

-

13

Audio

input

Input

level

-5

dB

(100%

modulation),

input

impedance

more

than

47

k

ohms

15-24

EXT/INT

mode

sync

switch

Ground

High

state

(open):

Sync

signal

input

from

the

CMPTR

connector

LOW

state:

Sync

signal

input

from

the

LINE

A

VIDEO

IN

connector

25*

IBM

luminance

signal

Positive

polarity

When

the

high

state

is

selected

at

pin

1

•

TTL

level

When

the

low

state

is

selected

at

pin

1:

Low

state

(qroundi

♦

Examples

for

microcomputer

connections

No.

Microcomputer\

9

25

SMC-70/SMC-70G

-

High

state

IBM

computer

High

state

Low

state

IBM

luminance

signal

TTL

3BIT

computer

Low

state

Low

state

Low

state

Wh.

e

the

information

given

is

true

at

the

time

of

printing,

small

pro¬

duction

changes

in

the

course

of

our

company's

policy

of

improve-

men

through

research

and

design

might

not

necessarily

be

in¬

dicated

in

the

specifications.

We

would

ask

you

to

check

with

your

appointed

Sony

dealer

if

clarification

on

any

point

is

required.

-

2

-

SAFETY

CHECK-OUT

PVM-1271G

■

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.

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

previous

repair.

Point

them

out

to

the

customer

and

recommend

their

replacement.

5.

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

impalement

on

a

broken

antenna

to

the

customer,

and

recommend

the

antenna’s

replacement.

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

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

0.5

mA

(500

microampers).

Leakage

current

can

be

measured

by

any

one

of

three

methods.

1.

A

commercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-540A.

Follow

the

manufacturers’

instructions

to

use

these

instru¬

ments.

2.

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

analog

meters

must

have

an

accurate

low-

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

of

a

passive

VOM

that

is

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

a

2V

AC

range

are

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-^ound,

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

normal

brilliance

if

the

screw

is

at

ground

potential.

(See

Fig.

B)

-

3

-

PVM-1271Q

TABLE

OF

CONTENTS

Section

Title

Page

1.

GENERAL

1

-1.

Features.

5

1-2.

Precautions.

5

1-3.

Location

of

Controls.

6

1-4.

Function

of

Controls.

7

1-

5.

System

Connections.

9

2.

DISASSEMBLY

2-

1.

Cabinet

Ass’y

Removal.

12

2-2.

B

Board

Removal.

12

2-3.

Chassis

Ass’y

Removal.

13

2-4.

F

board

Removal

(1).

14

2-5.

F

board

Removal

(2).

14

2-

6.

Picture

Tube

Removal.

15

3.

ADJUSTMENTS

3-

1.

Setup

Adjustments.

16

3-1-1.

Beam

Landing.

16

3-1-2.

Convergence.

17

3-1-3.

Focus.

17

3-1-4.

White

Balance.

18

3-2.

Safety

Related

Adjustments

.-.

20

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

IS

SUSPECTED.

'<1

Section

Title

Page

i

3-3.

Circuit

Adjustments

.

23

3-3-1.

D

Board

Adjustments

..

23

3-3-2.

B

Board

Adjustments.

27

3-3-3.

Q

Board

Adjustments.

31

4.

DIAGRAMS

4-1.

Block

Diagram.

35

4-2.

Circuit

Boards

Locating..

38

4-3.

Waveforms

.

39

4-4.

Schematic

Diagram.

43

4-5.

Printed

Wiring

Boards.

51

B

Board.

51

.

D

Board.

52

Q

Board.

54

H

Board.

55

Cl

Board

.

55

Cj

Board

.

57

F

and

F2

Boards.

58

4-

6.

Semiconductors.

59

5.

EXPLODED

VIEWS

5-

1

.

Cabinet.

50

5-2.

Bezel.

61

5-3.

Chassis.

62

6.

E

L

ECTRICAL

PARTS

LIST

ATTENTION

AUX

COMPOSANTS

RELATIFS

A

LA

SECURITEI!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

ET

PAR

UNE

MARQUE

i\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'lMPOR-

TANCE

EST

CRITIQUE

POUR

LA

SECURITE

DU

FONCTIONNEMENT

SONT

IDENTIFIES

DANS

LE

PRESENT

MANUEL.

SUIVRE

CES

PROCEDURES

LORS

DE

CHAQUE

REMPLACEMENT

DE

COMPOSANTS

CRITIQUES,

OU

LORSQU'UN

MAUVAIS

FONCTIONNE¬

MENT

EST

SUSPECTE.

-

4

-

PVM-1271Q

^

SECTION

1

GENERAL

1-2.

PRECAUTIONS

1-1.

FEATURES

High-resolution

picture

The

Super

Fine

Pitch

Trinitron

picture

tube

(0.25

mm

aper¬

ture

grill)

gives

high

resolution

(composite:

550

iines,

RGB;

650

lines)

picture.

When

used

as

a

character

display,

up

to

2000

characters

(80

characters/line

x

25

lines)

can

be

displayed

with

great

clarity.

Analog/digital

RGB

input

Analog

RGB

and

digital

(TTL

level)

RGB

input

signals

can

be

fed

to

the

RGB

input

connectors

(BNC

type

and

25-pin

multi

connectors),

which

allows

a

microcomputer

or

a

data

infor¬

mation

system

such

as

teletext,

to

be

connected

to

this

monitor.

Receives

4

TV

broadcasting

standards

This

monitor

can

receive

PAL,

SECAM,

NTSC

and

NTSC4

43

♦

signals.

The

appropriate

broadcasting

standard

is

selected

automatically.

Colorpure

Filter

When

NTSC

video

signals

are

received,

a

colorpure

filter

ac¬

tivates

to

increase

the

resolution

about

35%,

resulting

in

fine

picture

detail

without

color

spill

or

color

noise.

Underscan

mode

The

signal

normally

scanned

outside

of

the

screen

can

be

monitored

in

the

underscan

mode.

Automatic

frequency

control

The

incoming

sync

timing

error

compensation

speed

can

be

set

to

fast

or

slow,

according

to

the

input

signal.

In

the

slow

mode,

the

jitter

from

a

video

tape

recorder

can

be

easily

monitored.

Superimposition

of

a

picture

from

a

microcomputer

on

a

pic¬

ture

from

video

equipment

When

a

Sony

SMC-70

or

SMC-70G

microcomputer,

an

SMI-7073

superimposer

and

video

equipment

such

as

a

video

disc

player

are

used

together

with

this

monitor,

a

pic¬

ture

from

the

microcomputer

can

be

superimposed

on

a

pic¬

ture

from

the

video

equipment.

♦

An

NTSC443

system

signal

is

obtained

by

playing

back

NTSC-recorded

video

tapes

with

a

video

tape

recorder/player

specially

designed

for

use

with

this

system.

On

safety

•

Check

that

the

operating

voltage

of

your

unit

is

identical

with

the

voltage

of

your

local

power

supply.

•

Should

any

liquid

or

solid

object

fall

into

the

cabinet,

unplug

the

unit

and

have

it

checked

by

qualified

personnel

before

operating

it

any

further.

•

Unplug

the

unit

from

the

wall

outlet

if

it

is

not

to

be

used

for

several

days.

•To

disconnect

the

ac

power

cord,

pull

it

out

by

the

plug.

Never

pull

the

cord

itself.

On

installation

•

Allow

adequate

air

circulation

to

prevent

internal

heat

build-up.

Do

not

place

the

unit

on

surfaces

(rugs,

blankets,

etc.)

or

near

materials

(curtains,

draperies)

that

may

block

the

ven¬

tilation

holes.

•

Do

not

install

the

unit

in

a

location

near

heat

sources

such

as

radiators

or

air

ducts,

or

in

a

place

subject

to

direct

sunlight,

excessive

dust,

mechanical

vibration

or

shock.

On

cleaning

To

keep

the

unit

looking

brand-new,

periodically

clean

it

with

a

soft

cloth.

Stubborn

stains

may

be

removed

with

a

cloth

lightly

dampened

with

a

mild

detergent

solution.

Never

use

strong

solvents

such

as

thinner

or

benzine,

or

abrasive

cleansers

since

these

will

damage

the

cabinet.

As

a

safety

precaution,

unplug

the

unit

before

cleaning

it.

On

repacking

Do

not

throw

away

the

carton

and

packing

materials.

They

make

an

ideal

container

in

which

to

transport

the

unit.

When

shipping

the

unit

to

another

location,

repack

it

as

illustrated

on

the

carton.

If

you

have

any

questions

about

this

unit,

contact

your

authorized

Sony

dealer.

By

using

an

optional

MB-502

mounting

bracket,

the

PVM-

1271Q/1371QM

can

be

mounted

in

an

EIA

standard

19-inch

rack.

An

optional

SLR-102

slide

rail

is

also

available.

For

mounting

details,

see

the

appropriate

instruction

manual.

\

-5

Front

panel

6

PVM-1271Q

1-4.

FUNCTION

OF

CONTROLS

FRONT

PANEL

O

SECAM

button

Press

this

button

when

a

picture

from

SECAM

color

sources

is

distorted.

The

picture

wiil

become

clear.

O

SYNC

select

switch

Sync

may

be

supplied

from

an

external

sync

generator

to

the

EXT

SYNC

IN

connector

on

the

rear

PANEL.

When

an

ex¬

ternal

sync

is

supplied,

with

either

a

composite

or

non¬

composite

video

input,

set

the

SYNC

select

switch

to

EXT.

When

composite

video

is

supplied

with

no

external

sync,

set

the

SYNC

select

switch

to

INT.

O

AFC

(automatic

frequency

control)

switch

Select

the

AFC

operation

in

the

fast

mode

or

slow

mode.

FAST:

incoming

sync

timing

errors

are

compensated

for.

Normally,

set

this

switch

to

this

position.

SLOW:

incoming

sync

timing

errors

are

displayed

on

the

screen.

This

mode

is

used

to

monitor

the

jitter

from

a

VTR.

O

SCAN

MODE

select

switch

Normal

scanning

or

under

scanning

is

achieved

by

proper

setting

of

the

SCAN

MODE

select

switch.

Set

to

NORMAL

for

normal

scanning,

or

to

UNDER

for

viewing

a

picture

which

does

not

appear

in

normal

scanning.

Under

scanning

reduces

the

display

size

by

about

9%.

O

V

HOLD

(vertical

hold)

control

If

the

picture

rolls

vertically,

correct

it

with

this

control.

O

VOLUME

control

Turn

this

control

clockwise

or

counterclockwise

to

obtain

the

desired

volume.

O

HUE

control

This

control

is

effective

only

for

playing

tapes

of

the

NTSC

or

NTSC

443

system.

Use

to

obtain

the

most

natural

skin

tones.

Clockwise

rotation

makes

the

skin

tones

more

greenish;

counterclockwise

rotation

makes

them

more

purplish.

O

COLOR

control

Adjusts

the

color

intensity

of

the

picture.

Clockwise

rotation

makes

the

picture

more

vivid;

counterclockwise

rotation

makes

it

paler.

O

BRIGHT

(brightness)

control

Adjusts

the

brightness.

Normally

set

this

control

at

the

center

detent

position.

©

PICTURE

control

Adjusts

the

contrast,

color

intensity

and

brightness

simultaneously

in

the

proper

ratio.

©

POWER

switch

and

indicator

To

turn

the

monitor

on,

depress

the

POWER

switch.

The

in¬

dicator

will

light.

To

turn

the

monitor

off,

press

the

switch

again.

©

Input

indicators

Illuminate

to

indicate

the

input

select

button

pressed.

©

Input

select

buttons

Press

to

select

the

program

to

be

monitored.

LINE

A:

for

a

signal

from

the

LINE

A

connectors.

LINE

B:

for

a

signal

from

the

LINE

B

connectors.

VTR:

for

a

signal

from

the

8

-pin

VTR

connector.

RGB:

for

a

signal

from

the

R,

G

and

B

connectors.

CMPTR:

for

a

signal

from

the

25-pin

CMPTR

connector.

©

Color

system

indicators

Indicate

the

color

system

of

the

input

video

sLgnai.

PVM-1271Q

REAR

PANEL

O

LINE

A

O

LINE

B

Two

groups

(A

and

B)

of

line

input

connectors

for

the

com¬

posite

video

and

audio

signais

and

their

loop-through

out¬

put

connectors.

To

monitor

the

input

signals

to

these

connectors,

press

the

LINE

A

or

LINE

B

input

select

button

on

the

front

panel.

VIDEO

IN

connector

(BNC

type)

Connect

to

the

video

output

of

a

video

equipment,

such

as

a

VTR

or

a

color

video

camera.

For

a

loop-through

connection,

connect

to

the

video

output

of

another

monitor.

VIDEO

OUT

connector

(BNC

type)

Loop-through

output

of

the

VIDEO

IN

connector.

Connect

to

the

video

input

of

a

VTR

or

another

monitor.

AUDIO

IN

jack

(mini)

Connect

to

the

audio

output

of

a

VTR

or

to

a

microphone

via

a

suitable

microphone

amplifier.

For

a

loop-through

connec¬

tion,

connect

to

the

audio

output

of

another

monitor.

AUDIO

OUT

jack

(mini)

Loop-through

output

of

the

AUDIO

IN

jack.

Connect

to

the

video

input

of

a

VTR

or

another

monitor.

75-ohm

termination

switch

When

only

the

VIDEO

IN

connector

is

used

(nothing

is

con¬

nected

to

the

VIDEO

OUT

connector),

set

this

switch

to

ON.

When

both

the

VIDEO

IN

and

VIDEO

OUT

connectors

are

us¬

ed

together

for

loop-through

connection,

set

this

switch

to

OFF.

O

VTR

connector

(8-pin)

Line

input

for

the

video

and

audio

signals.

When

connected

with

the

8-pin

TV

connector

of

a

VTR,

the

video

and

audio

playback

signal

from

the

VTR

can

be

connected

with

a

single

cable.

To

monitor

the

input

signal

to

this

connector,

press

the

VTR

input

select

button

on

the

front

panel.

•

For

connection,

use

an

optional

video

cable

VMC-3P

(3

m,

9

feet),

-5P

(5

m,

15

feet)

or

-10P

(10

m,

33

feet).

O

EXT

SYNC

(external

sync)

IN

connector

(BNC

type)

When

this

monitor

operates

on

an

external

sync

signal,

con¬

nect

the

reference

signal

from

a

sync

generator

here.

OUT

connector

(BNC

type)

Loop-through

output

of

the

EXT

SYNC

IN

connector.

Con¬

nect

to

the

external

sync

input

of

video

equipment

to

be

syn¬

chronized

with

this

monitor.

75-ohm

termination

switch

When

only

the

EXT

SYNC

IN

connector

is

used

(nothing

is

connected

to

the

EXT

SYNC

OUT

connector),

set

this

switch

to

ON.

When

both

the

EXT

SYNC

IN

and

EXT

SYNC

OUT

connec¬

tors

are

used

together

for

a

loop-through

connection,

set

this

switch

to

OFF.

O

R

O

G

O

B

O

AUDIO

(RGB)

Analog

RGB

and

audio

input

connectors

and

their

loop-

through

output

connectors.

To

monitor

the

input

signal

to

these

connectors,

press

the

RGB

input

select

button

on

the

front

panel.

R/G/B

IN

conectors

(BNC

type)

Connect

a

character

generator,

microcomputer

or

video

camera

having

RGB

outputs

here.

R/G/B

OUT

connectors

(BNC

type)

Loop

through

output

of

the

R/G/B

IN

connectors.

Connect

to

the

RGB

inputs

of

another

monitor

here.

75-ohm

termination

switch

When

only

the

R/G/B

IN

connector

is

used

(nothing

is

con¬

nected

to

the

R/G/B

OUT

connector),

set

this

switch

to

ON.

When

both

the

R/G/B

IN

and

R/G/B

OUT

connectors

are

used

together

for

a

loop-through

connection,

set

this

switch

to

OFF.

AUDIO

(RGB)

IN

jack

(mini)

Connect

the

audio

output

of

the

equipment

connected

to

the

R/G/B

IN

connectors

here.

AUDIO

(RGB)

OUT

jack

(mini)

Loop-through

output

of

the

AUDIO

(RGB)

IN

jack.

O

CMPTR

(computer)

connector

(25-pin)

Connect

with

a

microcomputer

having

a

digital

(TTL

level)

or

analog

RGB

video

output.

To

monitor

the

input

signal

to

this

connector,

press

the

CMPTR

input

select

button

on

the

front

panel.

Color

temperature

selection

The

color

temperature

of

the

PVM-1271Q

has

been

preset

at

the

factory

to

9,300°K,

and

can

be

changed

to

6,500°K.

The

color

temperature

of

the

PVM-1371QM

has

been

preset

to

6,500°K,

and

can

be

changed

to

9,300°K.

If

the

switching

of

the

color

temperature

is

required,

consult

your

authorized

Sony

dealer._

8

PVM-1271Q

J

CONNECTING

SEVERAL

MONITORS

A

loop-through

connection

is

convenient

for

monitoring

the

same

signal

on

other

monitors.

Use

the

video/audio

input

and

output

connectors

of

LINE

A

or

LINE

B

to

connect

the

monitors.

Up

to

10

monitors

can

be

connected.

Set

the

75-ohm

termination

switch

of

the

last

monitor

to

ON

and

that

of

the

other

monitors

to

OFF.

Microphone

I

amp/

r

Microphone

VTR

j

I

Video

camera