JVC TM-1500PS Manuale utente

CONTENTS

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SPECIFICATIONS:

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No.50343

COPYRIGHT

©

1989

VICTOR

COMPANY

OF

JAPAN,LTD.

Dec.1989

TM-1500PS

|

SPECIFICATIONS

Dimensions

Weight

Color

system

Power

input

Power

consumption

Picture

Tube

Screen

Size

Scanning

frequency

High

voltage

Horizontal

resolution

Speaker

Audio

output

INPUT

A

INPUT

B

Y/C

INPUT

ACCESSORY

OPTION

FUSE

2

(No.50343)

36.0cm(W)

x

39.4cm(D)

x

33.4cm(H)

16.0kg

PAL/SECAM

system

AC

220

-

240V,50/60Hz

Max.

68W

15”(measured

diagonally),90°

deflection,in-Line

gun,data

grade

tinted

CRT

tri-dot

pitch

0.499mm

284mm(W)

x

213mm(H)

(H)

15.625KHz

(V)

50Hz

24kV(at

zero

beam

current)

More

than

450

lines

4.5cm

round(16Q)

x 1

0.75W

BNC

x

2(IN/OUT),Bridged

connection

is

possible.

VS-1Vp-p,75Q,negative

A

termination

switch

is

provided.(75Q2/OPEN)

RCA

connector

x

2(IN/OUT),Bridged

connection

is

possible.

390mVrms,High

impedance

8-pin

connector

x

1

VS-1Vp-p,752Q,negative

775mVrms,High

impedance

7-pin

connector

x

2(IN/OUT),Bridged

connection

is

possible.

Y-VS-1Vp-p,75Q,negative

C-0.3Vp-p(burst),75Q

A

termination

switch

is

provided.(75Q/OPEN)

RCA

connector

x

2(IN/OUT),Bridged

connection

is

possible.

390mVrms,High

impedance

Power

cord(approx.

2.4m)

x

1

RK-150E(RACK

MOUNT

ADOPTOR)

QMF51E2-3R15S

(3.15A)

Design

&

specification

subject

to

change

without

notice.

SAFETY

PRECAUTIONS

The

design

of

this

product

contains

special

hardware,

many

circuits

and

components

specially

for

safety

purposes.

For

continued

protection,

no

changes

should

be

made

to

the

original

design

unless

authorized

in

writing

by

the

manufactur-

er.

Replacement

parts

must

be

identical

to

those

used

in

the

original

circuits.

Service

should

be

performed

by

qualified

per-

sonnel

only.

Alterations

of

the

design

or

circuitry

of

the

products

should

not

be

made.

Any

design

alterations

or

additions

will

void

the

manufacturer's

warranty

and

will

further

relieve

the

manufac-

turer

of

responsibility

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

replace-

ment

components

rated

for

higher

voltage,

wattage,

etc.

Re-

placement

parts

which

have

these

special

safety

characteris-

tics

are

identified

in

the

parts

list

of

Service

manual.

Electri-

cal

components

having

such

features

are

identified

by

shading

on

the

schematics

and

by

(

4\)on

the

parts

list

in

Service

manual.

The

use

of

a

substitute

replacement

which

does

not

have

the

same

safety

characteristics

as

the

recommended

replacement

part

shown

in

the

parts

list

of

Ser-

vice

manual

many

create

shock,

fire,

or

other

hazards.

Don’t

short

between

the

LIVE

side

ground

and

NEU-

TRAL

side

grounding

or

EARTH

side

ground

when

re-

pairing.

Some

model’s

power

Circuit

is

partly

different

in

the

GND.

The

difference

of

the

GND

is

shown

by

the

LIVE

(1)

side

GND,

the

NEUTRAL(

»-)

side

GND

and

EARTH

(

®)

side

GND.

Don’t

short

between

the

LIVE

side

GND

and

NEUTRAL

side

GND

or

EARTH

side

GND

and

never

measure

with

a

mea-

suring

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.

lf

any

repair

has

been

made

to

the

chassis,

it

is

recommended

that

the

B1

setting

should

be

checked

or

adjusted

(See

AD-

JUSTMENT

OF

B,

POWER

SUPPLY).

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

damage,

therefore

operation

under

excessive

high

voltage

conditions

should

be

kept

to

a

minimum,

or

should

be

prevented.

If

severe

arcing

occurs,

remove

the

AC

power

im-

mediately

and

determine

the

cause

by

visual

inspection

(incor-

rect

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

voltage

circuitry

in-

cluding

the

picture

tube

must

be

the

exact

replacements

or

al-

ternatives

approvided

by

the

manufacturer

of

the

complete

product.

Do

not

check

high

voltage

by

drawing

an

arc.

Use

a

high

volt-

age

meter

or

a

high

voltage

probe

with

a

VTVM.

Discharge

the

picture

tube

before

attempting

meter

connection,

by

con-

necting

a

clip

lead

to

the

ground

frame

and

connecting

the

other

end

of

the

lead

through

a

10kQ

2W

resistor

to

the

an-

ode

button.

When

service

is

required,

observe

the

original

lead

dress.

Ex-

tra

precaution

should

be

given

to

assure

correct

lead

dress

in

the

high

voltage

circuit

area.

Where

a

short

circuit

has

oc-

curred,

those

components

that

indicate

evidence

of

overheat-

ing

should

be

replaced.

Always

use

the

manufacturer's

re-

placement

components.

9.

(1)

(2)

|

TM-1500PS

Isolation

Check

(Safety

for

Electrical

Shock

Hazard)

After

re-assembling

the

product,

always

perform

an

isolation

check

on

the

exposed

metal

parts

of

the

cabinet

(antenna

ter-

minals,

video/audio

input

and

output

terminals,

Control

knobs,

metal

cabinet,

screwheads,

earphone

jack,

control

shafts,

etc.)

to

be

sure

the

product

is

safe

to

operate

without

danger

of

electrical

shock.

Dielectric

Strength

Test

The

isolation

between

the

AC

primary

circuit

and

all

metal

parts

exposed

to

the

user,

particularly

any

exposed

metal

part

having

a

return

path

to

the

chassis

should

withstand

a

voltage

of

3000V

AC

(r.m.s.)

for

a

period

of

one

second.

(...

.

Withstand

a

voltage

of

1100V

AC

(r.m.s.)

to

an

appli-

ance

rated

up

to

120V,

and

3000V

AC

(r.m.s.)

to

an

appli-

ance

rated

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

ex-

posed

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,

etc.).

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

volt-

meter

having

1,000

ohms

per

volt

or

more

sensitivity

in

the

following

manner.

Connect

a

1,5002

10W

resistor

paralleled

by

a

0.15pF

AC-type

capacitor

between

an

exposed

metal

part

and

a

known

good

earth

ground

(water

pipe,

etc.).

Mea-

sure

the

AC

voltage

across

the

resistor

with

the

AC

voltmeter.

Move

the

resistor

connection

to

each

exposed

metal

part,

par-

ticularly

any

exposed

metal

part

having

a

return

path

to

the

chassis,

and

measure

the

AC

voltage

across

the

resistor.

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

AC

(r.m.s.).

AC

VOLTMETER

(HAVING

10002/V,

OR

MORE

SENSITIVITY)

PLACE

THIS

PROBE

ON

EACH

EXPOSED

METAL

PART

i

15002

10W

GOOD

EARTH

GROUND

Fig.A

(No.50343)

3

TM-1500PS

OPERATING

INSTRUCTIONS

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BULL

WVHYDVIC

ANITLNO

SNOLLOANNOO

SNOILOSNNOO

(No.50343)

7

TM-1500PS

|

SPECIFIC

SERVICE

INSTRUCTIONS

DISASSEMBLY

PROCEDURE

1.

Method

of

removing

the

top

cover

(1)

(2)

(3)

Remove

the

two

screws

©

in

Fig.

1.

Remove

the

respectively

two

screws

©

and

©.

By

pulling

the

cover

a

little

bit

backward,

dismount

the

cover

as

indicated

by

an

arrow.

Method

of

dismounting

the

rear

cover

e

(1)

(2)

Dismount

the

top

cover.

Remove

the

two

screws

©

in

Fig.

2-1.

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.

8

(No.50343)

gee|

Also

remove

the

screw

on

the

opposite

side.

Fig.

1

7)

STOUANUGULESTPUHAGOESOGETUAGEELESTD

3.

Method

of

dismounting

Input

PCB

@

Dismount

the

top

cover.

¢

Dismount

the

rear

cover.

(1)

Remove

the

three

screws

©

in

Fig.

3.

(2)

Remove

the

GND

wire.

(3)

When

the

two

hooks

between

the

Main

and

Input

PCBs

are

removed,

the

Input

PCB

will

be

dismounted.

(4)

Dismount

the

connectors,

etc.

as

required.

Method

of

dismounting

Power

PCB

@

Dismount

the

top

cover.

(1)

Remove

the

wire

clamp

fixing

the

transformer

on

the

Power

PCB

and

PCB

holder.

(2)

Remove

the

four

screws

©

in

Fig.

4

and

dismount

the

PCB

holder.

(3)

Remove

the

two

screws

©.

(4)

After

raising

the

Power

PCB

once,

pull

the

lower

part

of

the

PCB

outward

and

dismount

the

PCB.

(5)

Dismount

the

connectors,

etc.

as

required.

Method

of

checking

the

Main

PCB

¢

Dismount

the

top

cover.

e

Dismount

the

rear

cover.

(1)

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.

(2)

Remove

the

four

screws

@

and

dismount

the

bottom

lid.

(3)

Shift

the

Main

PCB

as

required.

|

TM-1500PS

CO

TD

TOGUEGUUCTUNGHEAUU

ASTON

EL

DEADA

TDG

TUATHA

oO

fe) fe)

Oo

UADUDATAAEAUAUTA

TG

SEELUTD

ERGY

Fig.

5

(Bottom

surface

view)

(No.50343)

9

|

TM-1500PS

|

6.

Method

of

dismounting

front

panel ass’y

e

(1)

(2)

(3)

(4)

(5)

(6)

Dismount

the

top

cover.

Dismount

the

rear

cover.

Remove

the

speaker

chord

(Main

PCB

[G]).

Remove

the

chord

of

degauss

coil

(Power

PCB

[I]).

Remove

the

two

chords

of

deflecting

coil

(Main

PCBs

[H]

and

[V}).

Remove

the

anode

cap.

Pay

attention

to

the

high

tension!

Since

the

cap

will

be

electrified,

be

sure

to

remove

the

cap

after

discharging.

After

removing

the

(CRT

EARTH]

chord,

pull

out

the

CRT

socket

PCB.

When

the

four

screws

@

are

removed,

the

front

panel

ass’y

will

be

dismounted

together

with

the

CRT.

@Since

the

CRT

is

heavy,

remove

the

screws

@

while

holding

the

front

panel

ass'y.

7.

Method

of

dismounting

speakers

e

°

(1)

(2)

Dismount

the

top

cover.

Dismount

the

rear

cover.

Dismount

the

front

panel

ass’y.

Remove

the

speaker

chord

(Main

PCB

[G)).

Remove

the

two

screws

fixing

the

speaker

to

the

front

panel

ass’y.

e@Unless

the

front

panel ass’y

has

been

dismounted

from

the

TV

set

body,

it

is

impossible

to

mount

the

speaker.

8.

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

(No.50343)

Chord

of

degauss

coil

Anode

cap

Pay

attention

to

high

Speaker

chord

tension!

Chord

of

deflecting

coil

Fig.

6-1

Use

the

long

screw

driver.

The

screw

driver

is

accessible

from

here.

Fig.

6-2

}

4

JVC TM-1500PS Manuale utente

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