JVC TM-41 EG User manual

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1

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JVG

Service

Manual

COLOUR

VIDEO

MONITOR

more.

TM-41

EG/EK

VICTOR

COMPANY

OF

JAPAN,

LIMITED.

JVC

Service

Manual

move.

TM-41

EG/EK

VICTOR

COMPANY

OF

JAPAN,

LIMITED.

TABLE

OF

CONTENTS

1.

GENERAL

DESCRIPTION

1

INTRODUCTION

2

FEATURES

3.

SPECIFICATIONS

-

i

4

PRECAUTIONS...........

.8

HANDLING

6

7

8

9

CONTROLS

AND

CONNECTORS

..

POWER

SUPPLY

.........

RECHARGING

THE

PBP-1

BATTERY

PACK

.

CONNECTIONS

2,

DISASSEMBLY

.1

TOPCOVER......

wt

.2

POWER

CORD

ASSEMBL

3

FRONTPANEL....

CRT

a

sjagts

stay

etind

hte

stot

5

6

7

VIDEO/AUDIO

BOARD-1.

-8

VIDEO/AUDIO

BOARD-2

NRNVNANNYONNN

3.

ALIGNMENT

PROCEDURE

Bt

VOLTAGE

(10.5Vj

............0..

PAL

COLOR

CIRCUIT

ADJUSTMENT

..

SECAM

COLOR

CIRCUIT

ADJUSTMENT

PURITY

......

ate

CONVERGENCE

...

ae

WHITE

BALANCE

...............-4,

SUB-CONTRAST

AND

SUB-BRIGHTNESS

.

SUB-COLOR

WOWKKWYAWWYW

Loamrnoarwon

4.

5.

EXPLODED

VIEWS

AND

PARTS

LIST

5.1

SAFETY

PRECAUTION

5,2

GENERAL

RULER

FOR

NUMBERING

METHOD

OF

SCREW/WASHER/E-RING

.

.

5.3)

GENERAL:

ASSEMBLY

©

22:2.

.0e°sfese

eis

2

aoma

ie

nqiestin

a

bd:

ogo

abe ade

a

to

ates

ergeS

gostei

a

6.

.

DIAGRAMS-AND.

CIRCUIT

BOARDS

6.1

BLOCK

DIAGRAM

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

Sea

becers)

fe

eee

oD

ieae

Wg

we

die

S

SOE

a

ase

SMT

aE

6-1

7.

ww

NNN

waVNonhwnu

ELECTRICAL

PARTS

LIST

MAIN

P.W.B.

ASSEMBLY

PAL/SECAM

PB

P.W.B.

ASSEMBLY

POWER

P.W.B.

ASSEMBLY

VIDEO/AUDIO

BOARD-1

.

toate

VIBDEO/AUDIO

BOARD-2........

POWER

SWITCH

P.W.B,

ASSEMBLY

VOLUME

P.W.B,

ASSEMBLY

.....

CRT

SOCKET

P.W.B.

ASSEMBLY

..

COLOR

SYSTEM

P.B.W.

ASSEMBLY

10

L.E.D.

P.W.B.

ASSEMBLY

......,-.-0-05

.11

JACK

P.W,B,

ASSEMBLY

...

0.2.0...

2

eee

ee

W

SECTION

1

GENERAL

DESCRIPTION

1.1.

INTRODUCTION

This

manual

provides

service

information

for

the

JVC

TM-41EG/EK

Color

Video

Monitor.

The

manual

de-

scribes

the

instruction

and

adjustment

of

electrical

operation.

Service

procedures

given

herein

cover

only

field

maintenance

services.

Adjustments

which

require

high-level

instruments,

jigs

and

techniques

are

excluded,

since

they

should

be

per-

formed

at

the

factory.

Due

to

design

modifications,

the

service

procedures

and

data

given

in

this

manual

are

subject

to

posssible

change

without

prior

notice.

WARNING:

TO

PREVENT

FIRE

OR

SHOCK

HAZARD,

DO

NOT

EXPOSE

THIS

UNIT

TO

RAIN

OR

MOISTURE.

POWER

SYSTEM

The

operating

voltage

of

this

set

is

preset

to

220

V

~(EK-version:

240

V~\}

at

the

factory.

Before

connectiong

to

mains,

check

that

the

vol-

tage

selector

on

the

rear

panel

is

set

to

the

same

voltages

as

your

local

mains

supply.

Adapting

to

local

power

line

This

set

operates

on

either

110,

127,

220

or

240

Vv.

The

voltage

selector

can

be

reset

as

follows.

Turn

the

voltage

selector

using

a

screw-

driver

until

the

proper

voltage

appears

at

the

cutout.

r

IMPORTANT

{In

the

United

Kingdom)

Mains

Supply

(AC

240

Vv,

50

Hz

only)

IMPORTANT

Do

not

make

any

connection

to

the

Larger

Ter-

minal

coded

E

or

Green,

The

wires

in

the

mains

lead

are

coloured

in

accordance

with

following

code:

[ees

Blue

to

N

{Neutral}

oF

Black

_

=

Brown

to

L

(Live)

or

Red

If

these

colours

do

not

correspond

with

the

terminal

identifications

of

your

plug,

connect

as

follows:

Blue

wire

to

terminal

coded

N

(Neutral)

or

coloured

Black.

Brown

wire

to

terminal

coded

L

(Live)

or

coloured

Red.

Connection

to

the

mains

suppiy

|

MAINS

POWER

SWITCH

The

mains

power

switch

is

located

on

the

rear

connector

panel,

Setting

this

switch

to

OFF

removes

all

applied

power

from

the

unit.

1.2

FEATURES

®

PAL/SECAM

switchable

colour

system

with

a

three-

position

switch

for

PAL,

AUTO

and

SECAM.

@

Compact,

lightweight

and

handy

to

use.

®@

A

G-inch

(13-cm

viewing

area)

in-line

black

stripe

picture

tube

capable.

of

accurate,

well-defined

colour

reproduction.

@

Flexible

AC/DC

power

supply

—

household

AC

or

built-in

exclusive

rechargeable

battery

pack

—

enabling

both

indoor

or

outdoor

use.

@

Built-in

speaker

enabling

simultaneous

audio

and

video

monitoring.

@

Dual

circuits

provided

for

audio

and

video

signals.

®

An

LED

indicator

to

warn

of

jow

battery

power.

®

Recharging

of

the

exclusive

battery

pack

PBP-1

(optional)

is

possible

with

the

AA-PATEG/EK/S

AC

Power

Adapter

(optional).

1.3.

SPECIFICATIONS

:

Colour

video

monitor

:

PAL/SECAM

switchable

+6”

(13-cm

viewing

area)

2

110/427/220/240

V

AC,

50

Hz

12

V

DC

{exclusive

battery

pack

PBP-1}

:

26

W

(AC)

14

W

(DC)

{about

1.5

hours

with

a

fully

charged

battery

pack)

11

Vp-p

(2

circuits}

Input

impedance

—

OPEN/75

ohms

selectable

1

Vp-p,

75

ohms

—6

dBs

(more

than

50

k

ohms)

1-6

dBs

:

77

mm

dia,

(16

ohms)

+

500

mW

110°

C

to

+40°

C

:

10°

C

to

70°

C

:

22.0(W)

x

13.5(H)

x34.5(D)

cm

r4..kg

:

Hood,

Power

cord,

Earphone

Auilio

cable,

Video

cable

Type

Colour system

Picture

tube

Power

requirement

Power

consumption

Video

input

Video

output

Audio

input

Audio

output

Built-in

speaker

Speaker

output

Operating

temperature

Storage

temperature

Dimensions

Weight

Accessories

Design

and

speciticarians

subject

to

change

without

notice,

1.4

PRECAUTIONS

vent

inflammables,

water

and

metallic

objects

:

entering

the

unit.

®

Do

not

remodel

or

disassemble

the

unit.

As

the

unit

incorporates

circuitry

generating

high

voltage,

physical

danger

and

malfunctioning

of

the

unit

itself

may

result.

@

Remove

the

AC

power

cord

from

the

AC

outlet

when

you

are

not

using

the

unit

for

a

long

period.

@

Do

not

damage

the

power

cord,

This

could

result

in

electric

shock,

1:5

HANDLING

®

Do

not

apply

shocks

or

vibrations.

Malfunctioning

of

the

unit

is

likely

to

result,

@

Do

not

place

the

unit

near

appliances

generating

strong

electric

or

magnetic

fields.

Noisy

or

unstable

pictures

are

likely

to

result.

®

Do

not

use

it

in

extremely

hot

places.

Exposed

to

the

direct

sunlight

for

a

!ong

period

of

time

or

placed

near

a

heater,

the

cabinet

could

become

deformed,

or

1-2

the

performance

of

the

internal

components

may

deteriorate.

Special

attention

is

required

in

summer.

Inside

a

closed

car

the

temperature

can

climb

to

as

high

as

80°

C

in

the

summer

sun.

@

Keep

the

monitor

clean

by

wiping

the

cabinet

and

the

CRT

screen

with

a

piece

of

soft

cloth.

Do

not

apply

thinner

or

benzine.

These

chemicals

can

damage

the

surface

finish

and

cause

printed

letters

to

be

erased

Ciean

excessive

soiling

with

a

diluted neutral

cleanser,

then

wipe

away

the

cleanser

with

a

dry

cloth.

®

Do

not

block

the

ventilation

slots.

For

outdoor

usage

Apply

a

screen

hood

(provided)

outdoors

to

eliminate

reflections

The

monitor

can

be

inclined

by

erecting

the

stands

on

the

bottom,

Fig.

1-7

1.6

CONTROLS

AND

CONNECTORS

1.

BRIGHTness

control

knob

Tur

counterclockwise

to

darken

the

picture

and

clockwise

to

illumine

it.

2.

CONTRAST

control

knob

Tum

counterclockwise

to

soften

contrast

anc

clockwise

to

sharpen.

3.

COLOUR

control

knob

Turn

clockwise

to

deepen

the

colour

tone

and

vice

versa.

4.

TINT

control

knob

Turn

counterclockwise

to

emphasize

reds

and

clockwise

to

emphasize

greens,

Normally

set

this

knob

to

its

center

click-stop

position.

5,

EARPHONE

jack.

Plug

in

the

provided

earphone;

audio

monitoring

is

possible.

6.

BATT

ALARM

indicator

This

iamp

lights

green while

the

unit

is

being

operated

on

AC

power.

If

this

lamp

lights

red

during

battery

operation,

it

indicates

that

the

battery

pack

installed

in

the

unit

is

nearing

the

end

of

its

power.

Immediately

recharge

the

battery

pack

or

replace

it

with

@

fresh

one.

Fig.

1-2

{a}

13°14

15

16

Fig.

1-2

(b)

INPUT

SELECT

“VTR™

switch

Push

this

switch

to

monitor

audio

and

video

signals

from

a

unit

connected

to

the

VTR

input

terminals

of

the

rear

panel.

INPUT

SELECT

“LINE”

switch

Push

this

switch

to

monitor

audio

and

video

signals

from

a

unit

connected

to

the

LINE

input

connectors

B

and

@4)

on

the

rear

panel.

OFF/VOLUME

control

knob

Turn

this

switch

clockwise

dill

it

clicks

for

power-

ing

the

TM-44EG/EK.

By

turing

the

knob

further

you

can

adjust

the

volume

of

the

audio.

Turn

the

knob

fuliy

counterclockwise

to

remove

power

from

the.unit.

Make

it

a

rude

to

put

this

switch

in

the

OFF

position

after

operating

the

unit

and

before

recharging

the

installed

battery

pack.

10.

Ww.

12,

13.

7

Battery

compartment

Install

the

exclusive

PBP-1

battery

pack

(optional)

here.

MAINS

POWER

switch

Switching

ON

applies

mains

power

to

the

set.

To

switch

off

the

set

completely,

set

the

power

switch

to

OFF,

AC

IN

©

socket

Using

the

provided

AC

power

cord,

connect

the

AC

IN

terminal

of

the

monitor

to

an

AC

outlet.

When

this

terminal

is

being

used,

the

installed

battery

cannot

be

employed.

Make

it

a

rule

to

unplug

the

power

cord

from

this

terminal

when

employing

the

exclusive

battery

pack.

VOLTAGE

SELECTOR

To

reset

the

operating

voltage,

see

“POWER

SYSTEM”

page

1-1.

15.

16.

17,

18,

19,

20.

24.

22,

23.

24.

25.

26,

27,

DC

IN

12

V/CHARGE

socket

Recharging

the

installed

battery

pack

is

possible

by

connecting

the

DC

output

plug

of

the

AA-

P41EG/EK/S

AC

Power

Adapter

to

this

terminal.

H.

HOLD

control

Turn

counterclockwise

when

the

picture

is

slanting

to

the

right

and

clockwise

when

slanting

to

the

left.

V.HOLD

control

Turn

in

either

direction

to

stop

vertical

rolling

of

the

picture.

HEIGHT

control

Turn

in

either

direction

to

adjust

the

picture

if

it's

too

narrow

or

elongated,

using

a

screwdriver,

VTR

(8-pin)

connector

Connect

the

monitor

to

the

video/audio

monitor

terminal

of

a

VTR

or

other video

sources.

VTR

75

22

termination

switch

Set

this

switch

to

75

Q

to

terminate

the

input

signals

of

the

VTR

connected

to

the

8-pin

connector

(8)

or

set

it

to

OPEN

to

make

these

signals

available

at

the

VTR

AUDIO

and

VIDEO

inpuvVoutput

connectors

@Q

and

QD

.

VTR

AUDIO

input/output

DIN

socket

VTR

VIDEO

input/output

connector

Connect

the

audio

and

video

outputs

from

a

video

tape

recorder

or

other

video

sources

to

these

two

connectors.

Or

use

these

connectors

to

produce

signals

bridged

from

the

VTR

connected

to

the

8-pin

connector

B

PAL/AUTO/SECAM

colour

system

select

switch

PAL:

—

Set

to

this

position

when

the

input

signal

conforms

to

PAL.

AUTO:

The

circuit

is

automatically

switched

either

for

PAL

or

SECAM

depending

on

the

input

signal.

This

position

is

sufficient

for

most

purposes.

SECAM:

Set

to

this

position

when

the

input

signal

conforms

to

SECAM,

VIDEO

LINE

IN

AUDIO

LINE

IN

DIN

connector

Connect

the

audio

and

video

outputs

from

a

video

tape

recorder

or

other

video

sources

to

be

monitored

to

these

two

connectors.

OUTPUT

VIDEO

connector

OUTPUT

AUDIO

DIN

socket

Use

these

connectors

to

produce

audio

and

video

signals

being

monitored

with

the

front

panel

input

select

switches

or

bridged

from

the

LINE

connectors

@3

and

@3)

.

75

Q

termination/OUTPUT

select

switch

Set

this

switch

to

75

82

to

terminate

the

input

signals

connected

to

the

LINE

VIDEO

IN

and

AUDIO

IN

connectors

@3

and

@4)

.

Or

set

this

switch

to

OPEN

BRIDGE

OUT

when

you

wish

to

make

avilabie

at

the

OUTPUT

VIDEO

and

AUDIO.

connectors

@5

and

@6)

signals

connected

to

the

LINE

connectors

@3

and

@4)

.

(“Fe

smionitor

etgnals

applied

to

the

&-pin

VTR

connector’

(8

or

the

audio

and

video

inpury

|

output

connectors

@Q

and

@})

,

push

the

front

penel

INPUT

SELECT

“VTR”

switch,

|

To

monitor

signals

applied

to

the

video

and

|

audio

LINE

connectors

@3

and

@4

,

push

the

!

front

panel

INPUT

SELECT

“LINE”

switch.

1.7

POWER

SUPPLY

Using

an

AC

outlet

Plug

the

provided

power

cord

into

an

AC

outlet.

Fig.

1-3

The

monitor

cannot

be

powered

from

the

battery

]

pack

if

the

power

cord

is

plugged

into

the

|

Monitor.

Make

sure

the

power

cord

is

discon-

|

nected

from

the

monitor

before

the

battery

pack

|

is

used.

i

7

J

Installing

the

exclusive

PBP-1

battery

pack:

1.

Loosen

the

screw

of

the

battery

compartment

cover

on

the

rear

panel

of

the

unit

and

remove

the

cover.

2.

Insert

the

battery

pack

with

its

cord

outward

and

Power

Adapter

can

recharge

two

PBP-1.

battery

packs

the

blue

ribbon

on

top

of

the

battery

pack.

simultaneously;

one

installed

inside

the

monitor

and

the

other

separate

from

the

unit

—

a

spare

battery.

ee

:

1.

Plug

the

provided

power

cord

into

the

AC

IN

terminal

of

the

AA-P41EG/EK/S.

Connect

the

AC

Power

adapter

to

an

AC

power

supply.

2.

When

the

battery

pack

installed

within

the

monitor

is

to

be

recharged,

connect

the

DC

output

cable

of

the

adapter

to

the

DC

IN

12

V/CHARGE

connector,

3.

The

monitor

should

be

set

to

OFF.

The

battery

cannot

be

recharged

unless

the

OFF/VOLUME

Fig,

1-5

control

knob

is

positioned

at

OF

F.

3.

Plug

the

battery

cord

into

the

socket

near

the

opening

and

replace

the

cover,

Fig.

1-8

4,

When

a

spare

battery

pack

is

to

be

recharged

simultaneously,

connect

the

PBP-1

battery

pack

to

the

EXT

BATTERY

terminal

of

the

adapter,

—

ca

If

the

BATT

ALARM

indicator

should

tight

red

after

installing

the

battery

pack,

recharge

or

replace

the

battery

pack

with

a

fresh

one,

A

battery

pack

running

out

of

power

should

be

recharged

immediately.

Fig.

1-9

1.8

RECHARGING

THE

PBP-1

BATTERY

PACK

5.

Set

the

adapter’s

power

switch

to

ON.

Recharging

will

begin.

The

AA-P4TEG/EK/S

AC

Power

Adapter

is

required

to

6.

Check

the

charging

condition

with

the

meter

rechange

the

exclusive

PBP-1.

The

AA-P41EG/EK/S

AC

provided

on

the

adapter.

Fig.

1-7

Meter

select

switch

VCR

BATTERY:

to

check

the

charging

condition

of

the

battery

pack

installed

in

the

monitor.

EXT

BATTERY:

to

check

the

charging

condition

of

the

battery

pack

directly

connected

to

the

AC

power

adapter.

NOTE:

®

About

8

hours

are

required

to

fully

charge

the

5

battery

pack,

However,

it is

recommendable

to

con-

How

to

check

the

charging

condition

tinue

charging

a

little

longer

fabout

10—12

hours).

1.

The

meter

needle

deflects

to

the

right

when

charging

starts.

Exclusive

PBP-1

battery

pack

®

Do

not

short-circuit

the

outer

rim

of

the

piug

to

‘ts

centre

pin.

@

Even

when

you

are

not

using

the

battery

pack

for

a

long

period

of

time,

recharge

it

from

time

to

time

This

is

because

the

battery

pack

will

gradually

dis-

Fig.1-11

charge

by

itself.

e

@

Ajways

recharge

the

battery

pack

after

use

and

store

2.

The

meter

needle

deflects

towards

the

left

as

it

100%

charged.

charging

proceeds.

@

Once

the

battery

pack

is

fully

discharged,

it

becomes

unusable.

@

The

PBP-1

is

a

lead/acid

battery.

Therefore,

when

it

is

used

at

temperatures

below

5°

C

(41°

F),

its

capacity

may

be

reduced

as

much

as

half.

Fig.

1-12

aft

3.

When

the

meter:

needle

points

to

FULL,

the

battery

has

been

fully

charged,

on

Plug

1

1.9

CONNECTIONS

Using

in

combination

with

a

JVC

VHS

recorder

The

TM-41EG/EK

is

most

convenient

when

you

use

it

in

combination

with

a

portable

recorder

and

camera

to

Fig.

1-14

monitor

camera

work

when

operating

outdoors.

Meter

select

switch