Panasonic C1381 User manual

ORDER

NO.

KME9010170C3

ervice

Manual

Color

Computer

Display

C1381

Chassis

No.

KMX-F407E

CONTENTS

Page

SAFETY

PRECAUTIONS.

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CONTROL

LOCATIONS

AND

OPERATIONS...

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SPECIFICATIONS

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DISASSEMBLY

INSTRUCTIONS

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GENERAL

CONNECTION

&

APPLICATIONS.

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ELECTRONIC

CIRCUIT

DESCRIPTION

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DIAGRAM

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SCHEMATIC

DIAGRAM

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MECHANICAL

PARTS

LOCATION.

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32

REPLACEMENT

PARTS

LIST

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Matsushita

Electric

Industrial

Co.,

Ltd.

Central

P.O.

Box

288,

Osaka

530-91,

Japan

Panasonic.

Specifications

are

subject

to

change

without

notice.

IMPORTANT

SAFETY

NOTICE

There

are

special

components

used

in

Panasonic

Computer

Display

which

are

important

for

safety.

These

parts

are

shaded

on

the

schematic

diagram

and

on

the

replacement

parts

list.

It is

essential

that

these

critical

parts

Be

be

replaced

with

manufacturer's

specified

parts

only

to

prevent

X-RADIATION,

shock,

fire,

or

other

hazards.

Do

not

modify

the

original

design.

ABBREVIATIONS

USED

IN

THIS

MANUAL

ITC

Integral

Tube

Component

AVR

Automatic

Voltage

Regulator

FET

Field

Effect

Transistor

CRT

Cathode

Ray

Tube

DY

Deflection

Yoke

FBT

Flyback

Transformer

CY

Convergence

Yoke

AFC

Automatic

Frequency

Control

MOS

Metal

Oxide

Semiconductor

VR

Variable

Resistor

SAFETY

PRECAUTIONS

GENERAL

GUIDELINES

1.

Use

an

isolation

transformer

in

the

power

line

and

AC

supply

to

troubleshoot.

_

When

servicing,

observe

the

original

lead

dress,

especially

the

lead

dress

in

the

high

voltage

circuits.

If

a

short

circuit

is

found,

replace

ail

parts

which

have

been

overheated

or

damaged

by

the

short

circuit.

-

_

After

servicing,

ensure

that

all

the

protective

devices

such

as

insulation

barriers,

insulation

papers,

shields,

and

isolation

R-C

combinations,

are

properly

installed.

Before

turning

the

display

on,

measure

the

resistance

between

B+

line

and

chassis

ground.

Connect

©

side

of

an

ohmmeter

to

the

B+

lines,

and

©

side

to

chassis

ground,

Each

line

should

have

more

resistance

than

the

following

specifications:

B+

Line

Minimum

Resistance

5V

370k

Q

12V

164

15V

330k

22

20V

680

Q

25V

14k

2

100V

Ak

Q

5.

Potentials,

as

high

as

24.5kV

are

present

when

this

display

is

in

operation.

Operation

of

the

display

without

the

rear

cover

involves

the

danger

of

a

shock

hazard

from

the

display

power

supply.

Servicing

should

not

be

attempted

by

anyone

who

is

not

thoroughly

familiar

with

the

precautions

necessary

when

working

on

high

voltage

equipment.

Always

discharge

the

anode

of

the

picture

tube

to

the

display

chassis

before

handling

the

tube.

_

After

servicing,

perform

the

leakage

current

checks

to

prevent

the

customer

from

being

exposed

to

shock

hazards.

f

a

LEAKAGE

CURRENT

COLD

CHECK

1,

Unplug

the

AC

cord

and

connect

a

jumper

between

the

two

prongs

on

the

plug,

.

Turn

on

the

display

power

switch.

.

Measure

the

resistance

value,

with

an

ohmmeter,

handling

26.0kV

without

causing

X-

Radiation.

NOTE:

It is

important

to

use

an

accurate,

periodically

calibrated

high

voltage

meter.

1.

Slide

the

Brightness

contro!

to

minimum.

between

the

jumpered

AC

plug

and

each

exposed

2.

Measure

the

high

voltage.

The

meter

reading

should

metallic

cabinet

part

on

the

display,

such

as

screwheads,

indicate

24.5

kV

+

O.5

kV.

If

the

meter

indication

terminals,

control

shafts,

handle

bracket,

etc.

When

an

is

out

of

tolerance,

immediate

service

and

correction

exposed

metallic

part

has

a

return

path

to

the

chassis,

is

required

to

prevent

the

possibility

of

premature

the

reading

should

be

between

240

kQ

and

5.2

MQ.

component

failure.

When

exposed

metal

does

not

have

a

return

path

to

the

3.

To

prevent

an

X-Radiation

possibility,

it

is

essential

to

chassis,

the

reading

must

be

oo,

LEAKAGE

CURRENT

HOT

CHECK

(See

figure

1.)

1.

Plug

the

AC

cord

into

the

AC

outlet.

DO

NOT

use

an

isolation

transformer

for

this

check.

.

Connect

a

1.5

kQQ,

10

watts

resistor,

in

parallel

with

a

0.15

wF

capacitor,

between

each

exposed

metallic

part

use

the

specified

picture

tube.

HORIZONTAL

OSC.

DISABLE

CIRCUIT

TEST

WARNING:

This

test

must

be

made

as

a

final

check

before

the

set

is

returned

to

the

customer.

.

With

rear

cover

removed,

supply

nominal

220V

AC

and

connect

a

host

computer

to

the

set.

on

the

set

and

a

good

earth

ground

such

as

a

water

pipe,

2.

Turn

on

the

power

switch

and

adjust

the

monitor

as

shown

in

figure

1.

controls

to

the

normal

position.

3.

Supply

a

full

screen

of

‘‘H”

characters

from

the

host

Leakage

Current

Hot-

Check

Circuit

computer.

AC

VOLTMETER

4.

Turn

R826

(B+

Adj.)

fully

counterclockwise.

5.

Connect

a

short

jumper

between

TP503

and

ground.

6.

Turn

R826

(B+

Adj.)

slowly

clockwise.

0.15uF

7.

Confirm

that

the

picture

fails

out

of

horizontal

sync.

[ese

8.

If

the

test

fails,

the

Horizontal

Osc.

Disable

Circuit

Neen

menae

Seopa

ay

eect

GaBUne

is

not

operating

and

must

be

repaired.

era

Mapas

"

:

Refer

to

the

Horizontal

Oscillator

Disable

Circuit

Figure

1

Repair

Procedure.

9.

After

confirmation

of

this

Test,

remove

the

short

jumper

3.

Use

an

AC

voitmeter,

with

1000

ohms/volt

or

more

sensitivity,

to

measure

the

potential

across

the

resistor.

.

Check

each

exposed

metallic

part,

and

measure

the

voltage

at

each

point.

.

Reverse

the

polarity

of

the

AC

plug

in

the

AC

outlet

and

repeat

the

above

measurements.

.

The

potential

at

any

point

should

not

exceed

0.75

volt

RMS.

A

leakage

current

tester

(Simpson

Model

229

or

equivalent)

may

be

used

to

make

the

hot

checks.

Leakage

current

must

not

exceed

0.5

milliamp.

If

a

measurement

is

Outside

of

the

specified

limit,

there

is

and

readjust

B+

voltage

to

100V.

This

circuit

must

be

operative

before

the

set

is

returned

to

the

customer.

HORIZONTAL

OSC.

DISABLE

CIRCUIT

REPAIR

PROCEDURE

1.

Connect

a

DC

voltmeter

between

the

cathode

of

D553

and

chassis

ground

of

the

main

board.

If

approximately

13.6V

is

not

present

on

the

anode,

find

the

cause.

Check

D553

and

R534.

;

2.

Connect

a

DC

voltmeter

between

the

cathode

of

D555

a

possibility

of

a

shock

hazard,

and

the

monitor

should

;

:

;

and

chassis

ground

of

the

main

board.

If

approximately

be

repaired

and

rechecked

before

it

is

returned

to

the

\

;

13V

is

not

present

on

the

cathode,

find

the

cause.

t

;

pas

Check

R566,

R567,

C560,

D553

and

R534.

X-RADIATION

3.

Repeat

step

2

procedure.

If

approximately

13V

is

f

WARNING:

1.

The

potential

source

of

X-Radiation

in

the

present

on

the*cathode,

check

D555,

and

IC5002.

=

display

is

the

high

voltage

section

and

the

4.

When

the

circuit

is

repaired,

perform

the

horizontal

picture

tube.

2.

When

using

a

picture

tube

test

jig

for

service,

ensure

the

jig

is

capable

of

oscillator

disable

circit

test

again.

CONTROL

LOCATIONS

AND

OPERATIONS

CONTROL

LOCATIONS

(Front

View)

;

=<

|

==]

it

~

|

=i——O

POWER

Switch

PUSH

POWER

Indicator

Front

User

Controls

-

@®

a

Contro!

©)

V-SIZE

Control

®

H-CENTERING

Control

(Rear

View)

AC

Inlet

OPERATIONS

@)

CONTRAST

Control

@

BRIGHTNESS

Control

@

H-SIZE

Control

Figure

2

Rear

User

Controls

Signal

Cable

Figure

3

@)

POWER

Switch

Push

to

turn

the

display

on,

and

push

again

to

turn

the

display

off.

When

the

display

is

on,

the

power

indicator

lights.

@

CONTRAST

Control

.

Adjust

the

display

for

proper

contrast

level.

(White

level)

®

BRIGHTNESS

Control

Adjust

the

display

for

proper

brightness

level.

{Black

level)

@

H-SIZE

Control

Adjust

the

display

for

proper

horizontal

size.

This

control

has

a

click

position

which

gives

the

proper

horizontal

size

for

[BM

personal

computer

standard

video

boards.

6)

H-CENTERING

Control

Adjust

the

display

for

proper

horizontal

position.

This

contro!

has

a

click

position

which

gives

the

proper

horizontal

position

for

1BM

personal

computer

standard

video

boards.

©)

v-SIZE

Control

Adjust

the

display

for

proper

vertical

size.

This

control

has

a

click

position

which

gives

the

proper

vertical

size

for

IBM

personal

computer

standard

video

boards.

@_

V-CENTERING

Control

Adjust

the

display

for

proper

vertical

position.

This

contro!

has

a

click

position

which

gives

the

proper

vertical

position

for

[BM

personal

computer

standard

video

boards.

—

4

—

i,

SPECIFICATION

1.

SCOPE

;

The

purpose

of

this

specification

is

to

describe

the

cabinet

type

color

display,

which

is

a

Multi

Scan

Rate

type.

2.

MECHANICAL

DESCRIPTION

2-1.

Dimensions

Width:

13.9

in,

(354

mm)

Depth:

14.8

in.

(375

mm)

Height:

14.4

in.

(366.5

mm)

2-2.

Weight

Monitor

only:

25.3

Ibs

(11.5

kg)

Monitor

packaged

for

shipment:

28.2

Ibs

(12.8

kg)

3.

CONSTRUCTION

3-1.

Outline

AC

See

ee

220

~

240V

VIDEO

~----

CONTR

CONTRAST

Boece

ec

BRIGHTNESS

H.

SIZE

H.

CENTER

Vv.

SIZE

V.

CENTER

REAR

FRONT

Figure

4

3-2.

CRT

Characteristics

Size:

14

inch

diagonal

(13

inch

visual)

Matrix:

Black

opaque

matrix

Matrix

type:

Negative

guard

band

Faceplate

type:

Non-glare

surface,

Tinted

screen

glass

CRT

part

No.

PAWD1C1381H*

Phosphor:

P22

Persistance:

Short

Array:

Triangular

dot

trios

Trio

pitch:

0.28

mm

typ.

at

center

*

This

No.

(PAWD1C1381H)

is

1TC

NO..

CRT

is

supplied

as

ITC.

ITC

=

Integral

Tube

Component

(CRT

with

DY

and

CY)

POWER

SWITCH

4.

ENVIRONMENTAL

CHARACTERISTICS

4-1.

Temperature,

Humidity

and

Altitude

4-1-1.

Operating

Conditions

Temperature:

+32°F

~

+104°F

(0°C

~

+40°C)

Humidity:

5

~

90%

(no

condensation)

Altitude:

10,000

Feet

max.

(3.048m

max.)

4-1-2.

Non-Operating

Conditions

Temperature:

—40°F

~

—149°F

(-40°C

~

+65°C)

Humidity:

5

~

90%

(no

condensation)

Altitude:

40,000

Feet

max.

(12.192m

max.)

4-1-3.

Storage

and

Shipment

Temperature:

—40°F

~

+149°F

(—40°C

~

+65°C)

Humidity:

5

~

95%

(no

condensation)

Altitude:

40,000

Feet

max.

(12.192m

max.)

4-2.

Vibration

and

Shock

(Packaged

Condition)

4-2-1.

Vibration

Frequency:

5

~

50

Hz

(Sweep

cycle

810

seconds)

Length

of

time

for

testing:

Vertical

oo...

40

min.

Horizontal

oo...

40

min.

ae

and

Rear

.......

20

min:

Right

and

Left

........

20

Fe

Acceleration

of

vibration:

Vertical

oe,

1.00G

Horizontal

...........

0.5G

4-2-2.

Shock

Corner

and

edge:

Height:

19.69

!n.(60

cm)

Front,

back

side

and

bottom:

Height;

23.62

in.(60

cm)

Shock

is

given

to

corner,

edge,

front,

back

side

and

bottom

10

times

each.

5.

ELECTRIC

PERFORMANCE

5-1.

Power

Supply

Input

voltage:

180

~

264V

AC

Input

frequency:

50

Hz

Input

current:

0.7A

max,

(at

230V

AC)

Power:

9Q5W

max.

(at

230V

AC)

Surge

current:

80A

max.

(at

230V

AC}

5-2.

Input

Signals

5-2-1,

5-2-2.

5-2-3.

Note:

Video

Signal

Polarity:

Positive

Signal

level:

Analog

0.7Vp-p/75

ohm

Horizontal

Synchronization

Signal

Polarity:

Positive/Negative

Signal

level:

TTL

level

separate

sync

Frequency

:

30

kHz

to

37

kHz

continuous.

Auto

size

and

center

at

31.5

kHz,

35.2

kHz

VGA/SVGA/8514A

standards.

Vertical

Synchronization

Signal

Polarity:

Positive/Negative

Signal

level:

TTL

level

separate

sync

Frequency:

50

Hz

to

90

Hz

continuous.

Non

Interlaced

or

Interlaced

modes.

Auto

size

and

center

for

VGA/

SVGA/8514A

standards.

The

monitor

detects

vertical

&

horizontal

sync

polarity

and?

automatically

select

its

polarity

and

frequency.

5-3.

Signal

Timing

See

figures

on

page

8.

5-4.

Video

Output

Amplifier

response

The

video

amplifier

produces

a

drive

signal

at

the

cathodes

of

the

CRT

of

sufficient

amplitude

to

produce

a

spot

luminance

with

rise

and

fall

times

of

less

than

12

nsec.

from

10%

to

90%

pulsed

level,

Cathode

voltage

is

30Vp-p./Signal

source

is

75

ohm

impedance

and

oscilloscope

impedance

is

5pF,1M

ohm.

6.

OPTICAL

CHARACTERISTICS

6-1.

Image

Test

Condition

Character:

All

'H”

character

Color:

White

Brightness

control:

©

Max.(without

background)

Contrast

control:

Max.

View

direction:

Parallel

to

the

CRT

axis

Ambient

Supply

voltage:

Room

temperature

220V

AC,

50

Hz

temperature:

Terrestrial

Horizontal

field...0.0

Gauss

Vertical

field.......

0.2

Gauss

magnetism:

Note:

All

measurements

shall

be

made

under

normal

conditions

after

an

initial

warm-up

time

of

20

minutes,

Note:

A

normal

condition

is

when

the

monitor

pro-

duces

the

desired

test

image.

The

conditions

of

the

items

are

normal

unless

(

otherwise

stated.

6-2.

Image

6-2-1.

Image

size

Horizontal:

9.65

+

0.39

in.

(245+

10

mm)

Vertical:

7.20

£

0.28

in,

(183

+ 7

mm)

6-2-2,

Image

position

6-2-3.

Cc

Mask

opening

B

Edge

line

of

the

image

D

1A

—

BI

S

0.236

in.

(6

mm)

IC

—

DI

S

0.236

in.

(6

mm)

Figure

5

Image

Position

Distortion

(A)

Pincushion

a,b

<_

0.098

in.

(2.5

mm)

*

c,d

<

0.098

in.

(2.5

mm)

Input

signal

is

a

crosshatch

pattern.

Figure

6

Pincushion

Error

Fy

(B)

Rectangularness

&

Parallelogram

Distortion

Bendy

0.118

in.

(3

mm)

Dosis

0.118

in.

(3

mm)

Input

signal

is

a

crosshatch

pattern.

Figure

7

Parallelogram

Distortion

(C)

Linearity

Figure

8

Linearity

X

(MAX.)

—

X

(MIN,)

HORIZONTAL

LINEARITY

=

—-—-—-——--__

x

100

(%)

S$

7.5%

X

(MAX,)

+

X

(MIN,)

Y

(MAX,)

—

Y

(MIN,)

VERTICAL

LINEARITY

=

—————_—__

x

100

(%)

S$

7.5%

Y

(MAX,)

+

Y

(MIN.)

Maximum

and

minimum

value

should

not

be

adjacent

to

each

other.

X

(MAX.)

=

Maximum

distance

between

vertical

lines

from

X1

to

Xm.

X

(MIN.)

=

Minimum

distance

between

vertical

lines

from

X1

to

Xm,

Y

(MAX,)

=

Maximum

distance

between

horizontal

lines

from

Y1

to

Yn.

Y

(MIN.)

=

Minimum

distance

between

horizontal

lines

from

Y1

to

Yn.

(D)

Rotation

Horizontal

tine

of

the

image

shall

be

within

the

shaded

area.

Edge

of

"image

Horizontat

center

of

CRT

a

=

0.079

in.

(2

mm)

Input

signal

is

a

crosshatch

pattern.

Figure

9

Rotation

(E)

Convergence

9.65

in.

(245

mm)

7.2

in.

(183

mm)

area

A

S

0.0118

in.

(0.3

mm)

areaB

S

0.0236

in.

(0.6

mm)

Figure

10

Mis-Convergence

Note:

Should

be

measured

under

the

following

conditions.

1)

Terrestrial

magnetism

without

horizontal

field

(O

Gauss).

With

vertical

field

of

0.2

Gauss.

2)

At

room

temperature

3)

Input

signal:

Crosshatch

R,

G,

B

mixed

colors.

6-3.

Image

Size

Variation

Notes

and

test

conditions

Image

size

variation

from

the

normal

image

size.

Within

+

0.118

in.(+

3m)

(Horizontal

and

Vertical)

Rotation

of

brightness

control

AC

line

voltage

varied

220

to

240

volts

Within

+

0.157

int

4

mm)

(Horizontal

and

Vertical)

External

ambient

temperature

3

varied

20

+

20

C

Within

+

0.157

in.(+

4mm)

{Horizontal

and

Vertical)

Testing

condition

is

normal

condition.

7,

OVERALL

PERFORMANCE

7-1,

Resolution

Horizontal

.....

...

1024

Pixels

Vertical

0.

768

Pixels

7-2.

insulation

More

than

100

MQ

Between

AC

line

and

chassis.

7-3.

Jitter

Less

than

1

dot

Invisible

at

a

distance

of

18

in.

(45.7

cm)

from

CRT

surface

8.

CONNECTOR

8-1.

Signal

Connector

15

mini

D-SUB

type

connector

(interface

cable)

et

*

oc:

i,

C1381

*%

TIMING

CHART

Horizontal

Sync

Timing

Line

Time

——+|

Total

Sync

Pulse

Active

—>|

Blanking

Figure

11

Standard

Signal

Timing

(Preset

Timing)

There

shail

be

preset

timing

for

8514/A,

SVGA

and

VGA,

Vertical

Syne

Timing

Line

Time

poner’

Total

Sync

Pulse

Front

Active

Blanking

:

Non-Interlaced

or

Interlaced.

NOTE:

Scanning

mode

Figure

12

8514/A

|

SVGA

Pixel

period

22.0

ns

27.8

ns

Pixel

Rate

44.90

MHz

(Interlaced)

36.0

MHz

Horizontal

Frequency

35.52

kHz

35.16

kHz

Line

Time

Total

28.15

us

28.44

pus

Active

22.80

us

22.22

us

Blanking

5.35

ys

6.23

ps

Front

Porch

0.18

ps

0.67

us

Sync

Pulse

3.92

us

2.00

us

Back

Porch

1.25

us

3.56

us

Vertical

Frequency

86.96

Hz

(Field

Frequency)

56.24

Hz

Frame

Time

Total

23.0

ms

17.78

ms

Active

10.81

ms

17.07

ms

Blanking

0.69

ms

0.72

ms

Front

Porch

0.014

ms

0.03

ms

Sync

Pulse

0.1126

ms

0.06

ms

Back

Porch

0.564

ms

0.63

ms

[

Active

Dots

(H

x

V)

1024

x

768

800

x

600

|

ty

i,

IBM

PS/2

(VGA)

Mode

1

Mode

2

Mode

3

Pixel

Period

35.30

ns

35.30

ns

39.70

ns

Pixel

Rate

28.32

MHz

28.32

MHz

25.176

MHz

Horizontal

Frequency

31.47

kHz

31.47

kHz

31.47

kHz

Line

Time

Total

31.78

us

31.78

ps

31.78

ps

Active

25.42

us

25.42

us

25.42

us

Blanking

6.36

ps

6.36

ps

6.36

Us

Front

Porch

0.64

ps

0.64

pus

0.64

us

Sync

Pulse

3.81

us

3.81

ps

3.81

Us

Back

Porch

1.91

us

1.91

ps

1.91

us

Vertical

Frequency

70.08

Hz

70.08

Hz

59.95

Hz

Frame

Time

Total

14.27.

ms

14.27,

ms

16.68

ms

Active

11.12

ms

12.71

ms

15.25

ms

Blanking

3.147

ms

1.557

ms

1.431

ms

Front

Porch

1.176

ms

0.381

ms

0.318

ms

Sync

Pulse

0.064

ms

0.064

ms

0.064

ms

Back

Porch

1.907

ms

1.112

ms

1.049

ms

Active

Dots

640

x

350

640

x

400

640

x

480

Signal

Timing

for

Apple

MAC

IL

Apple

MAC

IL*

*

When

the

Apple

MACIL

is

used,

adjust

H-Size

and

V-Size

to

proper

size

(approximately

236mm

x

176mm)

Pixel

Period

33.1

ns

by

H-SIZE

control

(R514)

and

V-SIZE

control

(R445).

Pixel

Rate

30.21

MHz

Horizontal

Frequency

35.00

kHz

;

Line

Time

Total

28.571

us

NOTE

1:

C1381

is

not

auto

sized

and

centered

when

Active

21.164

ps

used

with

Apple

MACIL.

Blanking

7.407

us

Front

Porch

2.116

us

NOTE

2:

When

Apple

MACII

is

used,

an

optional

Sync

Pulse

2.116

bs

15P-15P

mini

adaptor

(C81M2)

is

needed.

Back

Porch

3.175

us

Vertical

Frequency

66.67

Hz

Frame

Time

Total

15.000

ms

Active

13.714

ms

Blanking

1.286

ms

Front

Porch

0.086

ms

Sync

Pulse

0.086

ms

Back

Porch

1.114

ms

Active

Dots

640

x

480

*

H/V

composite

sync

DISASSEMBLY

INSTRUCTIONS

1.

Pedestal

Removal

—

a)

Turn

the

unit

rear

side

down

with

pedestal

towards

the

front.

(

Figure

13)

b)

Remove

2

screws

(A)

from

the

swivel.

(Figure

13)

c)

Slide

the

swivel

down.

(Figure

14)

d)

Turn

the

swivel

135°

counter-clockwise.

(Figure

14)

e)

Slide

the

swivel

up.

(Figure

15)

f}

Turn

the

swivel

45°

counter-clockwise.

(Figure

15)

g)

Slide

the

swivel

down

and

remove

it.

{Figure

16)

h)

Remove

3

screws

from

the

pedestal.

(Figure

17)

Figure

15

Swivel

Figure

13

Figure

14

Figure

17

—10—

Panasonic C1381 User manual

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