JVC TM-1400U(CV) User manual

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TM-1400U(CV)

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SCHEMATIC

DIAGRAM(APPENDED)

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

0-0

Мо.50353

COPYRIGHT

©

1990

VICTOR

COMPANY

OF

JAPAN,LTD.

Jan.1990

1

MI

18UUU(UV)

|

SPECIFICATIONS

Dimensions

36.5ст(У/)

x

39.4cm(D)

x

33.4cm(H)

Weight

15.9kg

Color

system

NTSC

system

Power

Input

AC

120V,60Hz

Power

consumption

Max.

1.05A,Avg.

60W

Picture

Tube

14"

(measured

diagonally),90°

deflection,in-Line

gun,data

grade

tinted

CRT

tri-dot

pitch

0.499mm

Screen

size

284mm(H)

x

213mm(V)

Scanning

frequency

(H)

15.75KHz

(V)

60Hz

High

voltage

24kV(at

zero

beam

current)

Horizontal

resolution

More

than

450

lines

VIDEO

IN/OUT

BNC

x

2(IN/OUT),Bridged

connection

is

possible.

(Termination

switch

provided)

VS-1Vp-p,75fl,negative

ACCESSORY

Power

cord(approx.

2.4m)

X

1

Design

&

specification

subject

to

change

without

notice.

2

(No.50353)

SAFETY

PRECAUTIONS

10.

The

design

of

this

product

contains

special

hardware,

many

circuits

and

components

specially

for

safely

purposes.

For

continued

pro-

tection,no

changes

should

be

made

to

the

original

design

unless

authorized

in

writing

by

the

manufacturer.

Replacement

parts

must

be

identical

to

those

used

in

the

original

circuits.

Service

should

be

performed

by

qualified

personnel

only.

Alterations

of

the

design

or

circuitry

of

the

products

should

not

be

made.

Any

design

alterations

or

additions

will

void

the

manufactur-

er's

warranty

and

will

further

relieve

the

manufacturer

of

responsi-

bility

for

personal

injury

or

property

damage

resulting

therefrom.

Many

electrical

and

mechanical

parts

in

the

products

have

special

safety-related

characteristics.

These

characteristics

are

often

not

evident

from

visual

inspection

nor

can

the

protection

afforded

by

them

necessarily

be

obtained

by

using

replacement

components

tated

for

higher

voltage,

wattage,

etc.

Replacement

parts

which

have

these

special

safety

characteristics

are

identified

in

the

parts

list

of

Service

manual.

Electrical

components

having

such

fea-

tures

are

identified

by

shading

on

the

schematics

and

by

(A)

on

the

parts

list

in

Service

manual.

The

use

б!

a

substi-

tute

replacement

which

does

not

have

the

same

safety

characteris-

tics

as

the

recommended

replacement

part

shown

in

the

parts

list

of

Service

manual

many

create

shock,

fire,

or

other

hazards.

Use

isolation

transformer

when

hot

chassis.

The

chassis

and

any

sub-chassis

contrained

in

some

products

are

connected

to

one

side

of

the

AC

power

line.

An

isolation

transform-

er

of

adequale

capacily

should

be

inserted

between

the

product

and

the

AC

power

supply

point

while

performing

any

service

on

some

products

when

the

HOT

chassis

is

exposed.

Don't short

between

the

LIVE

side

ground

and

NEUTRAL

side

grounding

or

EARTH

side

ground

when

repairing.

Some

model's

power

circuit

is

partly

different

in

the

GND.

The

dif-

ference

of

the

GND

is

shown

by

the

LIVE

(L)

side

GND,

the

NEU-

TRAL

tzr)

side

GND

and

EARTH

(Q)

side

GND.

Don't

short

be-

tween

the

LIVE

side

GND

and

NEUTRAL

side

GND

or

EARTH

side

GND

and

never

measure

with

a

measuring

apparatus

(oscilloscope

etc.)

the

LIVE

side

GND

and

NEUTRAL

side

GND

or

EARTH

side

GND

at

the

same

time.

If

above

note

will

not

be

kept,

a

fuse

or

any

parts

will

be

broken.

If

any

repair

has

been

made

to

the

chassis,

it

is

recommended

that

the

B,

setting

should

be

checked

or

adjusted

(See

ADJUSTMENT

OF

Ву

POWER

SUPPLY).

š

The

high

voltage

applied

to

the

picture

tube

must

conform

with

that

specified

in

Service

manual.

Excessive

high

voltage

can

cause

an

increase

in

X-Ray

emission,

arcing

and

possible

component

dam-

age,

therefore

operation

under

excessive

high

voltage

conditions

should

be

kept

to

a

minimum,

or

should

be

prevented.

If

severe

аг-

cing

occurs,

remove

the

AC

power

immediately

and

determine

the

cause

by

visual

inspection

(incorrect

installation,

cracked

or

melted

high

voltage

harness,

poor

soldering,

etc.).

To

maintain

the

proper

minimum

level

of

soft

X-Ray

emission,

components

in

the

high

volt-

age

circuitry

including

the

picture

tube

must

be

the

exact

replace-

ments

or

alternatives

approvided

by

the

manufacturer

of

the

com-

plete

product.

Do

not

check

high

voltage

by

drawing

an

arc.

Use

a

high

voltage

meter

or

a

high

voltage

probe

with a

VTVM.

Discharge

the

picture

tube

before

attempting

meter

connection,

by

connecting

a

clip

lead

to

the

ground

frame

and

connecting

the

other

end

of

the

lead

through

а

10КЯ

2W

resistor

to

the

anode

button.

When

service

is

required,

observe

the

original

lead

dress.

Extra

pre-

caution

should

be

given

to

assure

correct

lead-dress

in

the

high

voltage

circuit

area.

Where

a

short

circuit

has

occurred,

those

com-

ponents

that

indicate

evidence

of

overheating

should

be

replaced.

Always

use

the

manufacturer's

replacement

components.

Isolation

Check

(Safety

for

Electrical

Shock

Hazard)

After

re-assembling

the

product,

always

perform

an

Isolation

check

(1)

(2)

11.

TM-140UU(UV)

on

the

exposed

metal

parts

of

the

cabinet

(antenna

terminals,

vid-

eo/audio

input

and

oulput

terminals,

Control

knobs,metal

cabinet,

screwheads,

earphone

jack,

control

shafts,

etc.)

to

be

sure

the

prod-

uct

is

safe

to

operate

without

danger

of

electrical

shock.

Dielectric

Strength

Test

The

isolation

between

the

AC

primary

circuit

and

all

metal

parts

ex-

posed

to

the

user,

particularly

any

exposed

metal

part

having

a

re-

turn

path

to

the

chassis

should

withstand

a

voltage

of

1100V

AC

(r.m.s.)

for

a

period

of

one

second.

(....

Withstand

a

voltage

of

1100V

AC

(r.m.s.)

10

an

appliance

rat-

ed

up

to

120V,

and

3000V

AC

(r.m.s.)

to

an

appliance

raled

200V

or

more,

for

a

period

of

one

second.)

This

method

of

test

requires

a

test

equipment

not

generally

found

in

the

service

trade.

Leakage

Current

Check

Plug

the

AC

line

cord

directly

into

the

AC

outlet

(do

not

use

a

line

isolation

transformer

during

this

check.)

Using

a

"Leakage

Current

Tester",

measure

the

leakage

current

from

each

exposed

metal

part

of

the

cabinet,

particularly

any

exposed

metal

part

having

a

return

path

to

the

chassis,

to

a

known

good

earth

ground

(water

pipe,

elc.).

Any

leakage

current

must

not

exceed

0.5mA

AC

(r.m.s.).

•

Alternate

Check

Method

Plug

the

AC

line

cord

directly

into

the

AC

outlet

(do

not

use

a

line

isolation

transformer

during

this

check.).

Use

an

AC

voltmeter

hav-

ing

1,000

ohms

per

volt

or

more

sensitivity

in

the

following

manner.

Connect

а

1,5002

10W

resistor

paralleled

by

а

0.15pF

AC-type

ca-

pacitor

between

an

exposed

metal

part

and

a

known

good

earth

ground

(water

pipe,

etc.).

Measure

the

AC

voltage

across

the

resis-

tor

with

the

AC

voltmeter.

Move

the

resistor

connection

to

each

ex-

posed

metal

part,

particularly

any

exposed

metal

part

having

a

re-

turn

path

to

the

chassis,

and

measure

the

AC

voltage

across

the

re-

sistor.

Now,

reverse

the

plug

in

the

AC

outlet

and

repeat

each

mea-

surement,

Any

voltage

measured

must

not

exceed

0.35V

AC

(r.m.s.).

This

corresponds

to

0.5mA

АС

(r.m.s.).

AC

VOLTMETER

(HAVING

10002/V,

OR

MORE

SENSITIVITY)

PLACE

THIS

PROBE

ON

EACH

EXPOSED

METAL

PART

15002

10W

GOOD

EARTH

GROUND

High

voltage

hold

down

circuit

check.

After

repair

of

the

high

voltage

hold

down

circuit,

this

circuit

shall

be

checked

to

operate

correctly.

See

item

"How

to

check

the

high

voltage

hold

down

circuit”.

Ш

ONLY

CANADA

This

mark

shows

a

fast

operating

fuse,

the

letters

indicated

below

show

the

rating.

q

(No.50353)

3

(ESE0S'ON)

+

4

INSTRUCTIONS

JVC

TM-1400U(CV)

COLOR

VIDEO

MONITOR

SNOILORH.ISNI

9NI.LVH3dO

S

(29209

0М)

Thank

you

for

purchasing

а

JVC

color

video

monitor,

Your

new

monitor

will

provide

superior

quality

pictures

and

incorporates

many

useful

functions.

To

ensure

a

complete

understanding

of

the

monitor

and

to

extend

its

service

life,

please

read

all

instructions

in

this

booklet

and

keep

it

in

a

safe

place

for

future

reference.

•

14-Inch

data-grade

CRT,

together

with

а

comb

filter

for

pictures

with

a

horizontal

resolution

of

more

than

450

lines.

•

Video

input

terminal

with

bridged

connection

capability,

convenient

monitoring

between

two

video

sources

when

dubbing.

•

Mountable

in

a

standard

EIA

rack

with

optional

rack

mount

adapter

RK-150E,

(For

mounting,

refer

to

the

In“

struction

manual

of

the

RK-150E.)

CAUTION:

_

TO

REDUCE

THE

RISK

OF

ELECTRIC

SHOCK.

DO

NOT

REMOVE

COVER

(ОА

BACK).

NO

USERSEAVICEABLE

PARTS

INSIDE.

REFER

SERVICING

TO

QUALIFIED

SERVICE

PERSONNEL.

The

lightning

flash

with

arrowhead

symbol,

within

an

equilateral

triangle

is

intended

to

alert

the

user

to

the

presence

of

uninsulated

"dangerous

voltage'"

within

the

product's

enclosure

that

may

be

of

sufficient

magni-

tude

to

constitute

a

risk

of

electric

shock

to

persons.

The

exclamation

point

within

an

equilateral

triangle

is

intended

to

alert

the

user

to

the

Presence

of

important

operating

and

main-

tenance

(servicing)

instructions

in

the

litera-

ture

accompanying

the

appliance.

SAFETY

PRECAUTIONS

Safety

Precautions

.......

Controls

and

Connectors

...

Connections

...

Specifications

..

an

an

In

order

to

prevent

any

fatal

accidents

caused

by

misoperation

or

mishandling

of

the

monitor,be

fully

aware

of

all

the

follow-

ing

precautions.

WARNINGS

To

prevent

fire

or

shock

hazard,

do

not

expose

this

monitor

to

rain

or

moisture.

Dangerous

high

voltages

are

present

inside

the

unit

Do

not

remove

the

back

cover

of

the

cabinet.

When

servicing

the

monitor,

contact

qualified

service

personnel.

Never

try

to

service

it

yourself.

INFORMATION

Caution:

Changes

or

modification

not

approved

by

JVC

could

void

the

user's

authority

to

operate

the

eguip-

ment.

NOTE:

This

equipment

has

been

tested

and

found

to

comply

with

the

limits

for

a

Class

B

digital

device,

pur-

suant

to

Part

15

of

the

FCC

Rules.

These

limits

are

designed

to

provide

reasonable

protection

against

harmful

interference

in

a

residential

installation.

This

equipment

generates,

uses

and

can

radiate

radio

fre-

quency

energy

and,

if

not

installed

and

used

in

ac-

cordance

with

the

instructions,

may

cause

harmful

interference

to

radio

communications,

However,

there

is

no

guarantee

that

interference

will

not

occur

in

a

particular

installation.

М

this

equipment

does

cause

harmful

interference

to

radio

or

television

reception,

which

can

be

determined

by

turning

the

equipment

off

and

on,

the

user

is

encouraged

to

try

to

correct

the

interference

by

one

or

more

of

the

following

measures:

—

Reorient

or

relocate

the

receiving

antenna.

—

|ncrease

the

separation

between

the

equipment

and

receiver.

—

Connect

the

equipment

into

an

outlet

on

a

circuit

different

from

that

to

which

the

receiver

is

connected.

This

monitor

is

equipped

with

a

3-blade

grounding-type

plug

to

satisfy

FCC

rule.

If

you

are

unable

to

insert

the

plug

into

the

outlet,

contact

your

electrician.

PRECAUTIONS

Use

only

the

power

source

specified

on

the

rating

label

located

on

rear

of

the

cabinet.

~

When

not

using

this

unit

(ог

а

long

period

of

time,

ог

when

cleaning

it,

be

sure

to

disconnect

the

power

plug

from

the

AC

outlet.

Do

not

allow

anything

to

rest

on

the

power

cord.

And

do

not

locate

this

unit

where

people

will

tread

on

the

cord.

Do

not

overload

wall

outlets

or

power

cords

as

this

can

result

in

a

fire

or

electric

shock.

Avoid

using

this

unit

under

the

following

conditions:

—

in

extremely

hot,

cold

or

humid

places,

一

in

dusty

places,

—

near

appliances

generating

strong

magnetic

fields,

—

in

places

subject

to

direct

sunlight,

and

—

in

badly

ventilated

places.

Do

not

cover

the

ventilation

slots

while

in

operation

as

this

could

obstruct

the

required

ventilation.

When

dust

accumulates

on

the

screen

surface,

clean

with

а

soft

cloth.

Unplug

this

unit

from

the

AC

outlet

and

refer

servicing

to

qualified

service

personnel

under

the

following

conditions:

—

When

the

power

cord

is

frayedor

plug

is

damaged.

—

If

liquid

has

been

spilled

into

the

unit.

—

If

the

unit

does

not

operate

normally

following

the

op-

erating

instructions,

—

If

the

unit

has

been

dropped

or

the

cabinet

has

been

damaged.

—

When

the

unit

exhibits

a

distinct

change

in

perform-

ance.

Do

not

attempt

to

service

this

unit

yourself

as

opening

or

removing

covers

may

expose

you

to

dangerous

voltage

or

other

hazards.

Always

refer

servicing

to

qualified

service

personnel.

When

replacement

parts

are

required,

have

the

service

per-

sonnel

verify

in

writing

that

the

replacement

parts

he

uses

have

the

same

safety

characteristics

as

the

original

parts.

Use

of

manufacturer's

specified

replacement

parts

can

pre-

vent

fire,

shock,

or

other

hazards.

Upon

completion

of

any

servicing

or

repair

to

this

unit,

please

ask

the

service

personnel

to

perform

the

safety

check

described

in

the

manufacturer's

service

literatur

When

this

unit

reaches

the

end

of

its

useful

li

improper

disposal

could

result

in

a

picture

tube

implosion.

Ask

qualified

service

personnel

to

dispose

of

this

unit.

Laml\annet

cial!

(55505'0№)

9

(Front

Panel)

CHROMA

BRIGHT

CONTRAST

(Rear

Panel)

oren

(CEB)

sn.

0

У.

HOLD

control

Turn

the

adjust

the

vertical

synchronization

of

the

picture.

@

Picture

controls

Use

to

optimize

the

picture.

The

center

click

position

of

each

control

is

its

standard

setting.

This

standard

setting

can

be

varied

(preset)

by

turning

the

SUB

control

screws

at

the

side

of

the

controls.

Use

a

screwdriver

to

turn

the

SUB

controls,

•

PHASE

control

Turn

to

adjust

the

picture

hue,

Adjust

with

reference

to

skin

color.

•

CHROMA

control

Turn

to

adjust

the

color

density

of

the

picture

to

your

preference.

*

BRIGHT

control

Turnto

adjustthe

picture

brightness

to

your

preference.

*

CONTRAST

control

Turn

to

adjust

the

picture

contrast

to

your

preference.

©

POWER

switch/indicator

Pressing

this

switch

turns

the

power

on;

the

indicator

lights.

Pressing

this

switch

again

turns

the

power

off;

the

indicator

goes

off.

Q

Power

input

connector

Connect

to

an

AC

outlet

with

the

provided

power

cord.

©

INPUT

connectors/Termination

switch

Input

connector

for

composite

video

signal

and

output

connector

for

bridge-connected

signal

IN

:

When

inputting

a

signal

OUT

:

For

bridged

connection

Setting

the

termination

switch

750

:

When

there

is

only

an

input

signal

OPEN

:

For

bridged

connection

Q

SET

UP

switch

Do

not

reset

this

switch,

It

is

for

service

personnel

only.

*

Be

sure

to

disconnect

the

power

plug

from

the

AC

outlet

before

connecting

to

other

equipment.

*

Also

refer

to

the

instruction

manual

of

the

equipment

to

be

connected.

Videodisc

player

Control

console

Control

console

Video

monitor

*

When

using

any

of

the

OUT

connectors

(bridged

output),

set

its

termination

switch

to

"OPEN".

Туре

:

Color

video

monitor

Color

system

:

NTSC

system

CRT

:

14"

(measured

diagonally),

90°

deflection,

In-line

gun,

data-grade

tinted

CRT,

dot

pitch

0.499

mm

Screen

size

(H

x

V)

:

284

x

213

тт

Scanning

frequency

:

(H)

15.75

kHz

(V)

60 Hz

Horizontal

resolution

:

More

than

450

lines

Power

requirement

:

AC

120

V,

60 Hz

Power

consumption

:

Мах.

1,05

A,

Avg.

60

W

INPUT

:

VIDEO-BNC

x

2

.

VS—1

Vp-p,

75

f1,

negative

Bridged

connection

possible

(Termination

switch

provided)

Weight

115.9

kg

Accessory

:

Power

cord

(approx.

2.4

т)

x

1

Dimensions

(Unit:

mm)

Design

and

specifications

subject

to

change

without

notice

(AD)

NOOPL-WL

ИУ]

|

SPECIFIC

SERVICE

INSTRUCTIONS

DISASSEMBLY

PROCEDURE

1.

Method

of

removing

the

top

cover

(1)

Remove

the

two

screws

A

in

Fig.

1.

(2)

Remove

the

respectively

two

screws

®

and

©.

(3)

Ву

pulling

the

cover

a

little

bit

backward,

dismount

the

ТІ

>

ет.

|

ФА

T

ТШ

cover

as

indicated

by

ап

arrow.

1

IT

III

ІШ

III

Also

remove

the

screw

on

the

opposite

side.

Fig.

1

2.

Method

of

dismounting

the

rear

cover

*

Dismount

the

top

cover.

V)

Remove

ha

two

screws

Org.

El

a

7”

ШО

УУ

(2)

Pull

the

rear

cover

right

upward

until

it

stops

as

indicated

by

the

arrow,

and

dismount

the

cover.

For

assembly,

(1)

Since

the

four

positions

©

in

Fig.

2-2

are

hooked,

align

the

hooks

straight

and

let

them

move

down.

B

(No.50353)

3.

Method

of

dismounting

Input

PCB

e

e

(1)

(2)

(3)

(4)

Dismount

the

top

cover.

Dismount

the

rear

cover.

Remove

the

three

screws

©

in

Fig.

3.

Remove

the

GND

wire.

When

the

two

hooks

between

the

Main

and

Input

PCBs

are

removed,

the

Input

PCB

will

be

dismounted.

Dismount

the

connectors,

etc.

as

required.

4.

Method

of

dismounting

Power

PCB

(1)

Dismount

the

top

cover.

Remove

the

wire

clamp

fixing

the

transformer

on

the

Power

PCB

and

PCB

holder.

Remove

the

four

screws

©

in

Fig.

4

and

dismount

the

PCB

holder.

Remove

the

two

screws

©.

After

raising

the

Power

PCB

once,

pull

the

lower

part

of

the

PCB

outward

and

dismount

the

PCB.

Dismount

the

connectors,

etc.

as

required.

5.

Method

of

checking

the

Main

PCB

(1)

(2)

(3)

Dismount

the

top

cover.

Dismount

the

rear

cover.

Set

the

TV

set

sideways

as

shown

in

Fig.

5.

In

this

case,

lay

soft

cloth,

etc.

under

the

set

in

advance

to

prevent

any

damage

to

the

exterior

part.

Remove

the

four

screws

(D

and

dismount

the

bottom

lid.

Shift

the

Main

PCB

as

required.

ТМ

ИЛА

У

]

ШИШИШИ

!Ə/%IIIxIƏIIXIEIƏIIIIRVQWDTÑIçMIIIII

О

о

ШОУ

И

ШШШ

Ж

ИТ

Fig.

5

(Bottom

surface

view)

(Мо.50353)

9

кыы,

54

|

6.

Method

of

dismounting

front

panel

ass'y

*

Dismount

the

top

cover.

*

Dismount

(һе

rear

cover.

(1)

Remove

the

chord

of

degauss

coil

(Power

PCB

[I]).

(2)

Remove

the

two

chords

of

deflecling

coil

(Main

PCBs

[H]

and

[V)).

(8)

Remove

the

anode

cap.

+

Pay

attention

to

the

high

tension!!

Since

the

cap

will

be

electrified,

bė

sure

to

remove

the

cap

after

discharging.

(4)

After

removing

the

[CRT

EARTH]

chord,

pull

out

the

CRT

socket

PCB.

(5)

When

the

four

screws

©

are

removed,

the

front

panel

ass'y

will

be

dismounted

together

with

the

CRT.’

e

Since

the

CRT

is

heavy,

remove

the

screws

O)

while

holding

the

front

panel

ass'y.

7.

Precautions

for

wire

clamp

and

binding

band

(1)

The

wire

should

be

clamped

exactly.

(2)

Be

sure

not

to

remove

the

binding

band

for

wire

treatment.

Should

it

be

removed,

the

wire

should

be

treated

exactly

to

the

initial

position.

10

(Мо.50353)

Chord

of

degauss

coil

Anode

cap

Pay

attention

to

high

tensionl!

Chord

of

deflecting

coil

Fig.

6-1

Use

the

long

screw

driver.

The

screw

driver

is

accessible

from

here.

Fig.

6-2