Tatung CM-1480 Operating and installation instructions

SERVICE

INFORMATION

MODEL

CM-1480

COLOUR

DISPLAY

MONITOR

Code

No.

79-1191-2

..

,,.,,

...

:

CM-1480

SERIES

COLOUR

DISPLAY

MONITOR

SERVICE

MANUAL

PAGE

CONTENTS

CHAPTER

1.

SPECIFICATIONS

........

·····················

.1.1

CHAPTER

2.

PRECAUTIONS

AND

NOTICES

2-1

SAFETY

PRECAUTIONS

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

·········

2.1

2-2

PRODUCT

SAFETY

NOTICE

...........

········

2.1

2-3

SERVICE

NOTES

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

·············

..

2.2

CHAPTER

3.

OPERATING

INSTRUCTIONS

3-1

CONTROLS

AND

CONNECTIONS

..........

······

3.1

3-2

SET

UP

AND

OPERATION

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

········

3.2

CHAPTER

4.

ADJUSTMENTS

4-2

MONITOR

ADJUSTMENT

DEVICES

.........

·····4.1

4-3

PREPARATION

...........

·················

.4.2

CHAPTER

5.

TROUBLE-SHOOTING

CHARTS

5-1

ORGANIZATION

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

···············

5

.1

5-2

SAFETY

GUIDELINES

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

·········

5.1

5-3

AC

LEAKAGE

TEST

...........

············

..

5.2

5-4

SUGGESTED

TOOLS

AND

EQUIPMEMT

..........

·5.2

5-5

INSPECTION

AND

PREPARATION

...........

···5.3

5-6

COLOR

BAR

TEST

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

········•···

5.

3

5-7

WHITE

FIELD

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

···········

.5.3

5-8

TROUBLESHOOTING

CHARTS

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

······

5.3

.-

CHAPTER

6.

P.

C.

B

LAYOUT

Fig

6-1

PCB-MAIN

COMPONENtS

LAYOUT

.........

·6.1

Fig

6-2

PCB-VIDEO

DRIVE

COMPONENTS

LAYOUT

...

6.2

Fig

6-3

PCB-CRT

DRIVE

COMPONENTS

LAYOUT

.....

6.2

Fig

6-4

PCB-POWER

COMPONENTS

LAYOUT

.........

6.3

CHAPTER

7.

SCHEMATIC

DIAGRAM

Fig

7-1

MAIN

CIRCUIT

DIAGRAM

...........

·····7.1

Fig

7-2

POWER

CIRCUIT

DIAGRAM

...........

····7.2

CHAPTER

8.

REPLACEMENT

PARTS

LIST

8-1

ASSEMBLY

AS/lIS

..........

·.··············

8.

1

8-2

ASSEMBLY

PCB-MAIN

PWB-1323-02

...........

8.1

8-3

ASSEMBLY,

PCB-VIDEO

PWB-1324-02

.........

8.7

8-4

ASSEMBLY,

PCB-CRT

DRIVE

PWB-1337-02

.....

8.9

8-5

ASSEMBLY.

pcB-POWER

PWB-1345-02

.........

S.

10

8-6

ASSEMBLY.

PCB-POWER

LINE

FILTER

PWB-1254-05

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

·····

S.

12

8-7

ASSEMBLY.

PCB-INDICATOR

PWB-1357-01

.....

8.

12

8-S

MISCELLANEOUS

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

············

S.

13

.-

APPLICATION:

POWER

INPUT:

VIDEO

SIGNAl.S:

SYNC.

SIGNAl.S:

CHAPTER

1

SPECIFICATIOIIS

Typical data display device for personal

computer

-applications.

90

watts

(Nominal),

AC

rated voltage-refer to

backcover

label. A2

metre

3-wire

mains

cord

is

supplied.

16

colour:

Red.

green.

blue

and

intensity

video

signals.

64

colour:

R.G,B,

and

r,g,b, (intensity) video signals.

All

are positive

TTL.

Horizontal:

15.75kHz

+/-

300Hz

(lode

1)

or

21.853kHz

+/-

300Hz

(mode

2)

positive

TTL,

autoswitching

by

TTL.

Vertical:

47-63Hz

positive

TTL

at

mode

1.

47-63Hz

negative

TTL

at

lode

2.

SIGNAL

CONNECTOR:

9-Pin D-shell connector.

DISPLAY

TUBE:

14".

90

deflection,

29.1mm

neck,

0.31.1 dot pitch.

dot

inline.

dark

tint

non-glare.

Type

No.:

M34JDU30X66

DISPLAY

AREA:

Width:

250mm

Height: 1700

DISPLAY

COLOUR:

Mode

1:

16

colours.

Mode

2:

64

colours.

DISPLAY

CHARACTER:

2000

characters

(80CH.

X25

Rowan

8x8

dot

.atrix)

DISPLAY

TIME:

RETRACE

TIME:

RESO

LUTI

ON

:

KISCONVERGENCE:

Horizontal:

mode

1:

44.5us

mode

2:

39.37us

Vertical:

mode

1:

12.58ms

mode

2:

16.01ms

Horizontal:

mode

1: 6.0us

mode

2:

6.0us

Vertical:

mode

1:

1.215

mode

2:

0.615

Horizontal:

640

dots

Vertical:

mode

1:

200

scan

lines (non-interlaced)

mode

2:

350

scan

lines (non-interlaced)

0.5mm

Max.

within data area.

USER

CONTROl.S:

Power

on-off, brightness, contrast.

vertical

size 1,

vertical size

2,

Multi

colour switch, horizontal centre

1.

horizontal centre

2.

video

reverse

SWitch,

power

voltage

120VAC/240VAC

selector.

SERVICE

CONTROLS:

H-Hold

1.

H-Hold

2.

H-Width

2.

H-Centre.

V-Centre.

V-Hold,

Focus.

Screen.

E-W

Pincusion. set

ERT.

R-Drive.

r-Drive.

G-Drive;

g-Drive.

R-BKG.

G-BKG.

B+12.75V.

ENVIRONMENTAL:

Operation:

10°C

to

35°C

ambient

Storage:

-40°C

to

50

0e

DIMENSIONS:

WEIGHT:

Humidity:

50%

to

80%

(non-condensing)

Altitude:

to

7000

feet

above

sea level.

365

(W)

X

315

(H)

X

400

(D)

••

13.Skg

(net)

1.1

.-

ENVIRONMENTAL:

DIMENSIONS:

WEIGHT:

Operation:

100e

to 35°e ambient

Storage: -40oe to

50

0e

Humidity:

50%

to

80%

(non-condensing)

Alitude: to

7000

feet

above

sea

level.

365

(W)

X

315

(H)

X

400

(D)

mm

13.5kg (net)

1.2

.-

CHAPTER

2

PRECAUTIONS

AND

NOTICES

2-1

SAFETY

PRECAUTIONS

1.

Observe

all

cautions

and

safety

display cabinet

and

on

the display chassis.

2.

Operation

of

these displays outside the cabinet or with the cover

removed,

involves a

shock

hazard

from

the display

power

supplies.

Work

on

the display should not

be

attempted

by

anyone

who

is

not

thoroughly familiar with precautions necessary

when

working

on

high

voltage equipment.

3.

Do

not

install,

remove

or

handle the picture tube

in

any

manner

unless shatter-proof goggles are

worn.

People

not

so

equipped should

be

kept

away

while handling picture tube.

Keep

picture tube

away

from

the

body

while handling.

4.

The

picture tube is constructed to limit

X-RADIATION

to

0.5

mR/HR

at

300

microamperes

anode

current.

For

continued protection,

use

the

recommended

replacement tube only,

and

adjust the voltages

so

that

the designated

maximum

rating

at

the

anode

will not

be

exceeded.

5.

Before

returning a serviced display to the customer, a thorough

safety

test

must

be

performed

to verify that the display

is

safe to

operate without danger

or

shock.

Always

perform

an

AC

leakage

current

check

on

the

exposed

metallic parts

of

the cabinet.

Proceed

as

follows:

Connect

the monitor

power

lead

to

the

mains

supply, via

an

isolation

transformer,

and

switch

on.

Using

the

test

circuit

shown

in Fig.

2-

1,

measure

the

AC

leakage current

between

each

pole

(L

and

N)

of

the

supply

and

all

accessible metal parts.

The

earth leakage current

must

not

exceed

3.5mA.

MAINS

INPUT

L

N

..

-

==-

E

CONNEC

I~

EXPOSE

T

TO

o

METAL

PARTS

I~I

--

MEASURING

CIRCUIT

RESISTANCE.

2000

oh

ms

Fig

2-1

AC

LEAKAGE

CURRENT

TEST

CIRCUIT

2.1

.-

PRCDU8T

SAFETY

NOTICE

Xany

electrical

and

mechanical

parts in this chassis provide special

visual safety protection.

The

protection afforded

by

them

cannot

necessarily

be

obtained

by

using replacement

components

rated for

higher voltage, wattage, etc

..

Before

replacing

any

of

these

components,

read

the

parts

list

in

this

manual

carefully.

The

use

of

substitute replacement parts

which

do

not

have

the

same

safety characteristics

as

specified

in

the parts

list

may

create

shock,

fire,

X-RAY

radiation

or

other hazards.

2-3

SERVICE

NOTES

1.

When

replacing parts

or

circuit

boards,

wrap

the wires

around

terminals before soldering.

2.

When

replacing a

high

wattage

resistor

(more

than

1/2W)

on

a

circuit

board,

keep

the

resistor

about

10mm

(1/2

in.)

away

from

circuit

board.

3.

Keep

wires

away

from

high

voltage or

high

temperature

components.

4.

Keep

wires

in

their

original position

so

as

to

reduce

interference.

,

"ARMIIIG

I

CHECK

POWER

VOLTAGE

SELECTOR

IS

CORRECT

120

VAC

OR

240

VAC

.-

-...

..........

-"

CHAPTER

3

OPERATING

INSTRUCTIONS

3-1

CONTROLS

AND

CONNECTIONS

;"

POWER:

The

power

rocker switch turns the 1I0nitor

on

or off.

o

MULTI

COLOUR

INDICATOR:

A

green

LED

lights

when

the 1I0nitor

is

switched

on

with colour displayed

on

the

normal

state.

Push

Multi-colour switch

on

the

front

to

appropriate position for desired

:!<

BRI

GHTNESS:

*

CONTRAST:

f,c

120/240VAC

SELECTOR:

*

V.

SIZE

(1

and

2):

*

H.

PHASE

(1

and

2):

i.e

POWER

INPUT

JACK:

~e

POWER

LEAD:

display.

The

brightness control sets the overall or

average intensity

of

illumination

of

the dis-

play

The

contrast control sets

the

intensity

of

the

data displayed.

The

selector switch adapts the monitor for

operation

from

the local

AC

power

source.

The

vertical size adjustments

(mode

1

and

mode

2)

set the

amount

of

vertical

(top to

bottom)

raster deflection.

The

horizontal

phase

adjustments

(mode

1

and

mode

2)

set the horizontal

(left

to right)

position

of

the

display within the

raster

area.

A3-pin

power

connector

is

located

on

the rear

panel.

A

2m

3-wire

mains

lead connects

power

to

the

monitor.

::c

VIDEO

SIGNAL

CABLE:

A 1.

5m

cable, terminated

with

a 9

D-type

connector, supplies

video

and

sync. signals to

the

monitor.

The

cable

is

attached

to

the

monitor

and

is

not

detachable.

Fig

3-1

illus-

trastes

the

D-type

connector.

Table

3-1

lists

the

connector signal for

each

mode

of

opera-

tion.

~c

VIDEO

REVERSE

SWITCH:

Move

the switch to reverse the

background

and

image

colours.

3.1

.-

3-2

Set

up

and

Operation:

Perform

the

following steps

to

set

up

and

operate the monitor.

1.

Place

the

monitor

on

a

flat

surface near

the

computer

and

near

an

AC

power

outlet.

Be

certain that

the

ventilation

slots

in

the

cabinet

are-

not

blocked

or

obstruc.ted.

2.

Connect

the

video

signal cable

from

the

monitor

to the

computer.

3.

Plug

the

power

cord

into

the

monitor

and

then

into

an

AC

outlet.

Be

certain that

the

120/240

VAC

selector switch

on

the rear panel

is

set

to

the

correct position.

WARNING:

Removing

the earth

from

the

AC

power

source aay present a

potentially lethal

shock

hazard.

4.

Turn

on

the

computer

and

the

monitor.

The

front

panel

green

LED

should

light.

The

system

prompt

for

the

computer

should

be

dis-

played.

5.

Adjust

the

left

panel

brightness

and

contrast controls to obtain a

comfortable display.

If

your

CM-1480

monitor

requires service, refer to the controls

and

adjustments information

of

this

publication

and

verify that

all

controls

and

adjustments

on

the display are correctly set.

If

your

monitor

does

require service,

it

must

be

returned

with

the

mains

lead.

Table

3-1

Ho.

1

2

3

4

5

6

7

8

9

Fig

3-1

9-Pin

Colour

Monitor

Signal

Cable

Description

Mode

1

Mode

2

Shield

Gnd.

Ground

Signal

Gnd.

r

Red

R

Green

G

Blue

B

Intensity g

Unused

b

Horiz. sync. Horiz.

sync.

Vert. sync. Vert.

sync.

.

3.2

.-

....

.........

-"

4-1

CHAPTER

4

ADJUSTMENTS

This

chapter

~ontains

instructions for

performing

the

various

monitor

adjustments.

Because

these adjustments are

performed

while

the

monitor

is switched

on,

observe

proper

precautions

to

avoid

personal injury.

Specific

warnings

are included

where

necessary.

Paragraph

4-2

lists

the various adjustment devices

and

their

component

numbers.

They

are arranged according

to

the

circuit

board

or

location

where

they

can

be

found.

If a particular adjustment

does

not

correct a

problem,

refer

or

section 5 for additional information.

4-2

Monitor

Adjustment

Devices

DEVICE

R208

R209

R526

R527

R566

R567

R523

R563

R593

R309

R306

R366

R326

R408

R468

R433

R493

R413

R473

R435

R333

R907

R451

):t

R813

Focus

G2

EXTERNAL

DESCRIPTION

Left

panel

brightness control

Left

panel

contrast control

VIDEO

BOARD

(PWB-1324)

Primary

red

drive

Secondary

red

drive

Primary

green

drive

Secondary

green

drive

CRT

BOARD

(PWB-1337)

Red

cut-off

Green

cut-off

Blue

cut-off

MAIN

BOARD

(PWB-1337)

POWER

SUPPLY

OTHER

VR

Vertical

hold

Vertical size, lode I

(Rear

panel)

Vertical size,

mode

2

(Rear

panel)

Vertical centring

Horizontal

hold,

mode

1

Horizontal

hold,

mode

2

Horizontal

width,

mode

1

Horizontal width.

mode

2

HQrizontal

phase,

lode

1

(Rear

panel)

Horizontal phase,

lode

2

(Rear

panel)

Horizontal centring

E-W

pincus

ion

Sub-

brightness

22.5kV

EHT

B+

12.8

+/-O.lV

High

voltage

resistor

block

High

voltage resistor

block

4.

,

.-

....

"'"-."

Tatung CM-1480 Operating and installation instructions

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