JVC JX-W9(E) User manual

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1

Table of contents

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JX-W9

BSE

MODEL

JX-W9

(E),

(EB),

(EK)

PAL

Contents

Safety

Precautions

........

0.0 cee

eee

eee

ene

3

11.

Switch

Function

and

Operation

Mode

Table

....

26

“hy

Features!

occ

o5k

he

Rete

ee

id

eee

a

eed

eens

4

12.

ICs

and

Adjusting

Points

Locations

.....-.--+>

28

2.

Specifications.

2.0.0...

eee

ee

ee

4

—

13.

WiringDiagram

...........

re

se

egehens

29

3.

Names

of

Parts

and

Their

Functions..........

5

14.

Exploded

View

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

Separate

Insertion

4.

Main

Parts

Locations

......

Fad

fit

h

Megatins

ace

7

15.

Electric

Parts

List...

0...

0.00

0

cee

eee

30

|

5.

Disassembly...

0.2

cc

ee

8

16..Mechanical

Parts

List...

0.2.0...

...22

202

eee

35

6.

Troubleshooting...

.......000

eee

e

eee

10

17.

Packing

Materials

and

Parts

Numbers

.....--.->+

36

7.

Adjustment

Procedures

..........0.000005

19

-

18.

Accessories

List

...........00%

biteh

eatulantaseneyte

37

8.

Block

Diagram

..

0.0.00...

ee

ee

wee

es

23

19.

Schematic

Diagram

...........

Separate

Insertion

9.

Wipe

Gate

Logic

Diagram

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

24

20.

Printed

Circuit

Boards

........

.

Separate

Insertion

10.

Switching

Truth

Table..............0.....

25

A

No.

70053

JUN.

1987

JX-W9

|

Safety

Precautions

1.

The

design

of

this

product

contains

special

hardware

and

5.

Leakage

current

check

many

circuits

and

components

specially

for

safety

pur-

poses.

For

continued

protection,

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

originat

circuits.

Service

should

be

performed

by

qualified

personnel

only.

_

Alterations

of

the

design

or

circuitry

of

the

product

should

not

be

made.

Any

design

alterations

or

additions

will

void

the

manufacturer’s

warranty

and

will

further

relieve

the

manufacturer

of

responsibility

for

personal

injury

or

property

damage

resulting

therefrom.

.

Many

electrical

and

mechanical

parts

in

the

product

have

special

safety-related

characteristics.

These

charac-

teristics

are

often

not

evident

from

visual

inspection

nor can

the

protection

afforded

by

them

necessarily

be

obtained

by

using

replacement

components

rated

for

higher

voltage,

wattage,

etc.

Replacement

parts

which

have

these

special

safety

characteristics

are

identified

in

the

parts

list

of

the

service

manual.

Electrical

components

having

such

features

are

identified

by

shading

on

the

schematics

and

by

(

A

)

on

the

parts

list

in

the

service

manual,

The

use

of

a

substitute

replacement

which

does

not

have

the

same

safety

characteristics

as

the

recom-

mended

replacement

part

shown

in

the

parts

list

in

the

service

manual

may

create

shock,

fire,

or

other

hazards.

_

The

leads

in

the

products

are

routed

and

dressed

with

ties,

clamps,

tubings,

barriers

and

the

like

to

be

se-

parated

from

live

parts,

high

temperature

parts,

Mov-

ing

parts

and/or

sharp

edges

for

the

prevention

of

electric

shock

and

fire

hazard.

When

service

is

required,

the

original

lead

routing

and

dress

should

be

observed,

and

it

should

be

confirmed

that

they

have

been

returned

to

normal,

after

re-as-

sembling.

(Electrical

shock

hazard

testing)

After

re-assembling

the

product,

always

perform

an

isolation

check

on

the

exposed

metal

parts

of

the

product

(antenna

terminals,

knobs,

metal

cabinet,

screw

heads,

headphone

jack,

control

shafts,

etc.)

to

be

sure

the

product

is

safe

to

operate

without

danger

of

electrical

shock.

Do

not

use

a

line

isolation

transformer

during

this

check,

@

Plug

the

AC

line

cord

directly

into

the

AC

outlet.

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.

Any

leakage

current

must

not

exceed

0.5

mA

AC

(r.m.s.).

®

Alternate

check

method

Plug

the

AC

line

cord

directly

into

the

AC

outlet.

Use

an

AC

voltmeter

having

1,000

ohms

per

volt

or

more

sensitivity

in

the

following

manner.

Con-

nect

a

1500

2

10W

resistor

paralleled

by

a

0.15

uF

AC-type

capacitor

between

an

exposed

metal

part

and

a

known

good

earth

ground.

Measure

the

AC

voltage

across

the

resistor

with

the

AC

voltmeter.

Move

the

resistor

connection

to

each

exposed

metal

part,

particularly

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

measurement.

Any

voltage

measured

must

not

exceed

0.75

V

AC(r.m.s.).

This

corresponds

to

0.5

mA

AC

(r.m.s.).

AC

VOLTMETER

ae

(Having

1000

ohms/volt,

or

more

sensitivity.)

Place

this

probe

15000

10W

on

each

exposed

metal

part.

Good

Earth

Ground

(No.

70053}

3

JX-W9

1.

Features

Source

input

picture

can

be

wiped

in

and

out

using

one

of 16

wipe

patterns

with

6

different

matte

background

colors.

Video

and

audio

can

be

faded

in

or

out

simultaneously

or

independently;

fade-to-black

and

fade-to-white

are

both

possible.

Wiping

and

fading

can

be

performed

manually

or

auto-

matically;

each

operation

variable

between

1

and

6

se-

conds.

Wiping

and

fading

can

be

used

together

or

separately.

Special

image

effects

(colorization,

painting,

black

and

white,

negative

and

defocus)

can

be

used

to

enhance

the

picture.

After

processing,

the

picture

can

be

wiped

with

the

source

input

(non-processed

picture).

2.

Specifications

Video

section

Signal

format

>

PAL

Input

terminals

:

BNC,

2

lines

(INPUT

1/2)

:

75

ohms,

unbalanced

:

BNC,

2

lines

(REC

OUT,

EFFECT

MONITOR)

Output

impedance

:

75-ohms,

unbalanced

Input

monitor

terminals:

BNC

(INPUT

1/2)

Output

impedance:

75

ohms,

unbalanced

Input

impedance

Output

terminals

Reference

input

level

:

1

Vp-p

Max.

allowable

input

:

1.5

Vp-p

Reference

output

level

:

1

Vp-p

(1

Vp-p

input,

75-ohm

loaded)

@

Two

input

sources

can

be

changed

over

automatically

using

the

wiping

or

fading

function

(AUTO

CROSS

INPUT).

®@

Two

pairs

of

input

terminals

are

provided,

with

source

monitor

output

terminals

for

direct

monitoring.

@

Monitor

selector

switch

is

provided

to

monitor

the

source

picture

and

the

processed

picture

on

a

single

monitor

TV.

,

@

Auxiliary

audio

input

terminals

and

Audio

Mix

knob

allow

mixing

with

external

sound

sources.

®@

Wipe

Reverse

switch

for

replacing

the

input

source

picture

with

the

matte

background

color

or

processed

picture.

®

Bypass

switch

is

provided

for

comparing

the

processed

picture

with

the

original

image.

Input

monitor

terminals:

RCA

pin

jacks,

2

lines

(INPUT,

1/2,

stereo)

Output

impedance

:;1kohm

Reference

input

level

:~10

dBV

(316

mV:

1

kHz)

Reference

output

level

:-10

dBV

+2

dB

(316

mV

<2

cB:

at

reference

level

input)

:

+6

dBV

(2

V:

1

kHz,

1%

distortion)

:

20

—

20,000

Hz

(-1

+2

dB/1

kHz,

Max.

allowable

input

Frequency

response

0

dB)

Signal-to-noise

ratio

:

80

dB

Crosstalk

:

70

dB

(1

kHz)

Distortion

rate

:

0.1

%

or

less

(-10

dBV,

1

kHz)

General

Signal-to-noise

ratio

Crosstalk

Wipe

duration

Audio

section

Input

terminals

Input

impedance

AUX

input

terminals

Input

impedance

Output

terminals

Output

impedance

4

(No.

70053)

:

48

dB

or

more

:

48

dB

or

more

(4.43

MHz)

:

Approx.

1

to

6

seconds

:

RCA

pin

jacks,

2

lines

(INPUT

1/2,

stereo)

:

47

kohms

:

RCA

pin

jacks,

1

line

(stereo)

:

10

kohms

:

RCA

pin

jacks,

2

lines

(REC

OUT,

EFFECT

MONITOR,

stereo)

:

1

kohm

Power

supply

Power

consumption

:

AC

220

VV,

50

Hz

(E),

(EB)

-

AC

240

VV,

50

Hz

(EK)

:

19

watts

(Power

on)

2

watts

(Power

off)

be,

(EB)

20

watts

(Power

on)

2

watts

(Power

off)

jie)

Dimensions

:

435(W)

x

82(H)

x

367(D)

mm

(including

knobs,

jacks

and

feet)

(17-3/16”

x

3-1/4"

x

14-1/2")

Weight

:

5.1

kg

(11.1

Ibs)

Design

and

specifications

subject

to

change

without

notice.

©

JX-W9

3.

Names

of

Parts

and

Their

Functions

Front

Panel

SSeS

eo

peel’

-=9

on

oa

ot

Coen

ea

Dee

maamoeoa)

F

@

POWER

switch

and

indicator

Press

to

turn

the

power

on;

the

indicator

lights.

Pressing

it

again

turns

the

power

off.

@

INPUT

select

switches

and

indicators

Press

to

select

the

input

source,

VCR-1

or

VCR-2;

the

selected

Input

indicator

lights.

@

WIPE

REVERSE

switch

and

indicator

__

When

wiping,

press

to

replace

the

input

source

picture

with

the

background

picture”;

when

this

switch

is

pres-

sed

to

on,

its

indicator

lights.

©

MODE

select

knob

Select

the

desired

operation,

(AUTO

CROSS

INPUT,

WIPE

or.EF

FECT),

with

this

knob.

®

MANUAL

control

knob

Used

to

perform

wiping

or

fading

manually.

Turning

counterclockwise

increases

the

background

color,

and

turning

clockwise

increases

the

input

source

picture.

@

MANUAL/AUTO

select

switch

and

indicators

Press

this

switch

to

select either

automatic

or

manual

—

wiping/fading.

The

selected

mode

indicator

lights.

@

SPEED

control

knob

Adjust

the

automatic

wiping/fading

speed

with

this

knob.

Turning

it

clockwise

increases

the

speed,

and

turning

counterclockwise

decreases

it.

(The

wiping/fading

speed

can

be

varied

between

1

and

6

seconds.)

@®

START

switch

and

indicator

Press

to

start

wiping

or

fading

automatically.

The

in-

dicator

blinks

when

the

switch

is

pressed,

and

goes

off

when

the

operation

is

finished.

©

COLOR

select

knob

;

Select

the

background

color

with

this

when

wiping

(6

colors

—

white,

black,

yellow,

green,

red

or

blue),

coloring

(4

colors

—

yellow,

green,

red

or

blue),

and

fading

(black

or

white).

@

COLORIZE

control

knobs

LEVEL:

Adjusts

the

color

intensity

(brightness)

of

the

section

to

be

colorized.

RANGE:

Adjusts

the

range

of

colorizing

section.

£

RUOKIIMX

—

MONI

OR

ered

FADER

i

peu

TE

rar

4s

2

beamed

@

PAINT

LEVEL

control

knob

Adjusts

the

color

brightness

of

any

area

being

painted.

@

BYPASS

switch

and

indicator

Press

to

deactivate

all

effects

(including

wipe

or

fade)

so

that

the

input

source

signal

is

sent

directly

to

the

output

terminal;

the

indicator

lights.

®

MONITOR

select

knob

Select

the

signal

to

be

output

to

the

monitor

TV

for

checking

or

monitoring

one

of

the

input

source

pictures,

or

the

processed

picture.

(N.B.:

Monitor

TV

must

be

connected

to

the

EFFECT

MONITOR

output

terminals.)

®.

AUDIO

MIX

knob

Balances

the

sound

from

the

input

source

with

the

sound

from

external

audio

source

equipment

connected

to

the

AUX

input

terminals

on

the

rear

panel.

®

EFFECT

select

switches

To

select

the

desired

effect

from

DEFOCUS,

NE-

GATIVE,

B/W,

COLORIZE

and

PAINT.

@

FADER

select

switches

To

select

the

fading

source

with

the

AUDIO

only

switch,

the

VIDEO

only

switch,

or

both.

@

WIPE

PATTERN

select

switches

Select

from

among

5

different

wiping

patterns

with

these

switches.

Except

for

the

circle,

the

other

4

pat-

terns

can

be

used

in

any

combination.

,

®

Source

status

indicator

(IN/OUT)

The

IN

indicator

lights

when

the

input

source

picture

is

in

the

“in”

position

on

the

screen.

The

OUT

indicator

lights

when

the

input

source

picture

is

in

the

“out’’

position

and

the

background

picture”

is

in

the

“in”

position.

*This

shows

the

picture

without

a

source

input

picture,

that

is,

the

matte

background

color,

fade-out

picture,

or

processed

picture.

(No.

70053)

5

JX-W9

Rear

Panel

o

Foor

te

OF

1G

oe

|

:

@

©

bE

ind

MAMUFACTURED

657

VICTOR

COM

PANY

OF

GAPAN.LTD.

TOKYO.

(oy

JAPAN.

SADE

J

JAPAN

@

INPUT

terminals

(VCR-1/VCR-2)

Connect

the

playback

VCRs,

etc.

to

these

terminals.

The

upper

terminals

correspond

to

the

INPUT-1

button

on

the

front

panel,

and

the

lower

terminals

to

the

IN-

PUT-2

button.

@

INPUT

MONITOR

output

terminals

(VCR-1/VCR-2)

These

terminals

are

used

to

monitor

the

input

source

from

the

INPUT

terminals

directly.

The

upper

terminals

are

for

INPUT-1

source,

and

the

lower

terminals

for

INPUT-2

source.

®

AUX

IN

terminals

Connect

external

audio

equipment

to

these

terminals,

for

mixing

or

replacing

the

audio

signal

of

the

input

sources

with

the

outboard

audio

source.

6

(No.

70053)

WARNING

AVIS

|

RISQUE

DE

CHOC

ELECTRIQUE

-

NE

PAS

OUVRIR:

[INPUT

MONITOR-2

|

a

_

a

Ne

O°.

:

:

a

©

9g:

Y

9!

VIDEO

AUDIO

V¥IOEO

AUDIO

os

:

SHOCK

HAZARD

-

DO

NOT

OPEN

SPEGAL

EFFECTS

GENERATOR

aE,

eae

@

REC

OUT

terminals

Connect

the

recording

VCR

to

these

terminals.

@

EFFECT

MONITOR

output

terminals

Connect

the

monitor

TV

to

these

terminals.

When.

the

MONITOR

OUT

selector

is

set

to

EF

FECT,

the

effected

picture

can

be

monitored,

and

when

the

INPUT

1

or

2

is

selected,

the

input

source

picture

can

be

monitored

directly.

JX-W9

4.

Main

Parts

Locations

Top

Cover

Reinforcement

Plate

Ni

W

tl

il

Front

PCB

(3)

Ass’y

Front

PCB

(1)

Ass’y

Front

PCB

(2)

Ass‘y

Front

Panel

Wipe

PCB

Ass‘y

Sub

Frame

Power

Switch

Main

PCB

Ass'y

Chassis

Power

Transformer

A

Cord

Stopper

A,

Power

Cord

A

Rear

Panel

Sub

PCB

Ass’y

A

‘

Safety

Parts

(No.

70053)

7

JX-W9

|

5,

Disassembly

8

(No.

70053)

Note:

For

connector

locations,

refer

to

page

30.

Removing

the

Top

Cover

©

1.

Remove

five

screws

@)

on

the

rear

panel

retaining

the

top

cover,

and

four

screws

@®

on

the

side.

2.

Remove

the

top

cover

by

pulling

it

backward,

Removing

the

Bottom

Cover

@

1.

Remove

ten

screws

()

attaching

the

bottom

cover

to

chassis

®

,

to

remove

the

bottom

cover.

Removing

the

Front

Panel

Ass’'y

®

1.

Remove

the

top

cover

according

to

the

above

procedure.

2.

Pull

out

the

three

knobs

A

,

knob

C

@

and

five’

knobs

B

@)

toward’you.

3.

Remove

four

screws

()

attaching

the

upper

section

of

the

front

panel

to

the

sub

frame

@

.

4.

Remove

three

screws

(3)

attaching

the

lower

section

of

the

front

panel

to

the

sub

frame.

5.

Pull

out

the

front

panel

forward

to

remove

it.

Removing

the

Reinforcement

Plate

1.

Remove

the

top

cover

according

the

above

procedure.

2.

Remove

two

screws

(5)

on

both

ends

of

the

reinforce-

ment

plate

and

pull

it

upward.

Removing

the

Rear

Panel

1.

After

removing

the

top

cover

(@)

,

remove

five

screws

@

retaining

the

rear

panel

and

chassis.

2.

Remove

thirteen

screws

retaining

the

pin

jacks

and

BNC

jacks

on

the

rear

panel.

3.

Pull

out

the

rear

panel

toward

you.

‘Removing

the

Wipe

PCB

Ass’y

1.

Remove

the

top

cover

@

,

reinforcement

plate

(4

and

rear

panel

according

the

above

procedures.

-

2.

Hold

the

upper

ends

of

four

holders

B

@0

at

the

corners

of

the

Wipe

PCB

with

pliers

to

unlock

it,

and

lift

it

up

to

remove

it.

JX-W9

Removing

the

Sub

PCB

Ass’y

@)

1.

Remove

the

Wipe

PCB

ass’y

(9

according

to

the

above

procedure.

Remove

the

screw

@

and

then

remove

the

power

supply

IC.

.

Remove

the

connectors

CN40

and

45.

.

Remove

the

two

screws

@6)

and

remove

the

power

switch.

.

Remove

the

wire

from

the

wire

clamper.

.

Hold

the

upper

ends

of

the

eight

holders

A

@3)

with

pliers

to

unlock

it,

and

lift

it

up

to

remove

it.

N

ooh

W

Removing

the

Sub

Frame

Ass’y

(2

and

Main

PCB

Ass’y

1.

Remove

the

top

cover

(@

,

front

panel

ass’y

@

,

rear

panel

@@),

reinforcement

plate

@

,

sub

PCB

ass’y

Qi),

and

Wipe

PCB

ass’y

(9)

according

to

the

above

pro-

cedures.

2.

Remove

the

washers

and

nuts

©)

of

the

AUDIO

MIX

knob

and

MONITOR

select

knob,

and

remove

the

front

PCB

(3)

ass’y

from

the

sub

frame.

3,

Remove

two

screws

@)

retaining

the

both

sides

of

the

sub

frame

and

chassis

©

.

4.

Hold

the

upper

ends

of

the

ten

holders

retaining

the

main

PCB

with

pliers

to

unlock

it,

then

lift

up

the

PCB

and

remove

the

sub

frame

ass’y

(2

and

main

PCB

ass’y

@

from

chassis

without

separating

them.

5.

Remove

washers

and

nuts

(A)

for

five

knobs

and

two

switches

from

the

sub

frame,

and

remove

the

sub

frame

ass'y

from

the

main

PCB

ass’y.

(No.

70053)

9°

JX-W9

6.

Troubleshooting

Notes:

1.

Input

signal:

Video:

Full-field

color

bar

(white

100

%),

1.0

Vp-p

Audio:

1

kHz,

-10

dBV

sine

wave

2.

NO:

When

normal

voltage

and

waveforms

are

not

present

YES:

Normal

voltages,

etc.

3.

Refer

to

the

“ICs

and

Adjusting

Points

Locations”

on

page

29.

4.

Before

starting

repairs,

check

each

adjustment

related

to

the

timing

pulse

in

“Adjustment

Procedure”

(on

page

19.)

5.

For

adjustment,

refer

to

the

‘Adjustment

Procedures’’.

Check

point

Normal

voltage

and

waveforms

AC

15.0

V

Adjusting

point

and

defect

NO:

©Power

cord

or

power

transformer

is

shorted,

@

Power

switch

or

power

transformer

connector,

etc.

is

defective.

:

eCheck

@.

1.

No

picture

nor

sound,

Secondary

side

of

power

transformer

©

1C17

or

D20

is

defective.

@

Lead

wire

or

connector,

etc.

of

IC17

is

defective.

:

®Check

@.

DC

12.0

V

(11.5

—

12.5

V)

Power

supply

of

main

circuit

Power

line

of

each

DC115-125V

section

¥

C232

S

®

Hot

sides

of

R1,

R8

(75

ohms)

NO:

®

Video

input

terminals

are

defective.

Check

the

voltage

and

waveforms

in

the

vicinity

of

Q1

or

G2.

2.

No

output

is

present

at

any

output

terminals.

Check

IN/OUT

of

.

No

output

is

Same

waveform

as

above.

NO:

¢1!C27

is

defective.

present

at

video

1C27.

Input-1

ON:

pin

13

goes

H

e

Connector

CN25-1,

CN25-2

and

lead

jacks

of

MONI-

IN

>

OUT

Gate

Input-2

ON:

pin

5

goes

H

wires

are

defective.

TOR

and

REC

pint

pin2

pin13

1C27

1C70

(Refer

to

“Switching

Truth

Table’’.)

OUT

terminals.

Or

their

levels

are

abnormal.

(With

BYPASS

on

and

off)

pin

4

pin3

pind

pin

13

>

pin

12

:

@

Check

©.

pin5

>

pini3

(Connected

to

CN25)

iC16

pin

1

(AN608)

eCheck

1C11

input

pins

(pins

11,

10),

output

pins

(pins

1,

2)

and

gate

pins

(pins

12,

13).

©

Check

each

voltage

and

waveform

at

Q65,

1C16,

O66

and

O67.

@

Check

1C12

input

pin

(pin

10),

output

pin

(pin

11)

and

gate

pin

(pin

12).

Adjust

VR35.

NO:

eCheck

Q13.

e

Connector

CN17-1

or

lead

wire

is

.

Emitter

of

Q55

.

No

output

is

present

at

video

jacks

on

MONI-

defective.

TOR

and

REC

@

Check

the

voltage

waveform

of

Q55.

OUT

terminals,

:

®Check

@.

Or

their

levels

are

abnormal.

(Only

when

BYPASS

off}

Emitter

of

Q62

@

Check

each

voltage

and

waveform

of

Q62,

!C15.

@

Check

!C9

in/out

pins

1,

2

and

gate

pin

13.

:

eCheck

@.

0.98

V

Adjust

VR33

Same

waveform

as

(8)

when

BYPASS

is

set

to

OFF.

1C11

pins

1,2

—

same

as

@).

Base

of

Q65

#1C11,1C10

is

defective.

e

Connector

CN29-2

is

defective,

or

check

peripheral

components,

etc.

pini3—>H

YES:

eCheck

Q65,

C138

and

its

peripheral

1C11

{C34

components,

etc.

pin13—>

pin

:

(Connected

to

CN29)

10

(No.

70053)

JX-W9

Check

point

Normai

voltage

and

waveforms

Adjusting

point

and

defect

Icg

When

Wipe

Manual

knob

is

set

@

Check

the

“Wipe

Gate

Logic

Diagram”.

IN

OUT

Gate

to

SOURCE,

gate

pin

13

is

H.

yee:

©

{C9

is

defective.

pin2

pint

pin13

®

When

Wipe

Manual

knob

is

set

pin

10pin

11

pin

12

to

MATTE,

gate

pin

12

is

H.

5.

When

wipe

@

|

130

pin

5

:

@Check

of

BPF1.

operation

is

set

——

@

Check

voltages

of

O5.

to

Source

side

it

i

:

eCheck

@.

(IN),

chroma

‘

:

output

is

not

present,

or

level

is

abnormal.

@

|

1C30

pin

3

:

@C98

is

misadjusted.

e@

{C30

pin

26

HD

PULSE

is

defective.

@

(C28

is

defective.

:

@Check

@.

Emitter

of

Q13

,

:

eCheck

the

vicinity

of

O83,

Q11,

Q13.

:

@Check

connector

CN17-1,

lead

wire,

O55,

Q56.

@

Check

clamp

circuit

consisting

of

1C9

in/out

pins

3,

4

and

gate

pin

5,

Adjust

VR2

(chroma)

.

When

wipe

Emitter

of

08

:

@Check

of

DL-1

operation

is

set

:

@

Check

voltage

and

waveforms

in

the

to

Source

(iN)

vicinity

of

Q6,

A7,

8.

side,

luminance

:

:

eCheck

@.

level

is

abnormal.

Weg!

_

Emitter

of

Q13

Same

as

@.

:

@Check

voltage

and

wavelgnn

of

013.

:

@

Check

connector

CN17

and

lead

wires.

Check

Q55,

Q56.

.

Background

1C28

Pin

5,

20

:

YO:

@

Check

1C30

Pin

19,

22.

(matte)

color

is

:

eCheck

@.

not

present,

or

.

:

;

0.55

V

-—_

7"

:

;

level

is

abnormal.

4,43

MHz

SC

Input

ul

Mode:

Wipe

1C31

Pin

8

(G)

NO:

eCheck

O10.

Color:

Y~

B

Pin

4

(R)

e

Check

D1,

D2,

D203,

D204.

Wipe

Operation

Pin

2

(B)

aur

ie

*

Check

$19

(COLOR

SW).

Knob:

Matte

wt

YES:

eCheck

(8.

: ;

1H

Outputs

at

each

pin

of

$19

*For

abnormal

(Color

SW)

hue

refer

to

—-

;

item

11

qnd

12.

Pin.8

Pin4

|

Pin2

*The

above

waveform

is

present

at

the

points

marked

0.

[e)

JO}

jo!

(No.

70053)

11