Atari SM124 Manuale utente

ATARI®

Chassis

No.:

-9

SVEN

HIGH

-RESOLUTION

MONOCHROME

MONITOR

CONTENTS

SAFETY

PRECAUTIONS

SPECIFICATIONS

ADJUSTMENT

AND

MAINTENANCE

THEORY

OPERATION

BLOCK

DIAGRAM

TIMING

CHART

TRANSISTOR

BASING

VOLTAGE

CHART

COMPONENT

P.C.B

TROUBLESHOOTING

CHART

REPLACEMENT

PARTS

LIST

EXPLODED

VIEW

SCHEMATIC

DIAGRAM

SERVICE

MANUAL

Printed

Korea

P/N

483-303A

missing page 2

SPECIFICATIONS

CATHODE

RAY

TUBE

Type:

Non

-glare

DARK

Size

Deflection

angle:

12",

90°

Neck

diameter:

Phosphor:

Paper

White

INPUT

Input

signal:

TTL

Signal

•

Video

Vp-p

Positive

•

Audio

Vp-p

•

Vertical

Drive

1.5

Vp-p

Negative

•

Horizontal

Drive

1.5

Vp-p

Negative

Power

Input

220V

50Hz,

0.26A

Input

Connector

Din

Connector

SCANNING

Horizontal

frequency

35.7

KHz

Horizontal

retrace

time

6.3

Vertical

frequency:

71.2

Vertical

retrace

time

420

VIDEO

•

Display

Area

(HXV)

210

130

•

Amplifier

Type

Linear

•

Frequency

band

width

MHz

•

Horizontal

resolution

1100

lines

center

•

Display

character

characters

GEOMETRIC

DISTORTION:

2.5%

max.

LINEARITY

•

Horizontal

10%

max.

•

Vertical

10%

max.

EXTERNAL

CONTROLS:

BRIGHTNESS,

CONTRAST,

ON/VOLUME

ADJUSTMENT

AND

MAINTENANCE

CIRCUIT

PROTECTION

Circuit

protection

provided

one

Mini

fuse,

the

power

board.

0.5

Ampere

fuse

(F901)

wired

into

one

side

the

line

and

provides

primary

protection

the

entire

chassis.

CENTERING

ADJUSTMENT

CAUTION:

The

following

adjustment

points

are

the

high

voltage

yoke

terminal.

the

raster

not

centered

the

raster

opening,

may

centered

removing

the

cabinet

back

and

ad-

justing

the

centering

tabs

the

neck

the

tube,

located

the

rear

the

deflection

yoke.

Turn

the

whole

device

clockwise

counter-

clockwise.

increase

the

amount

raster

shift,

move

the

two

tabs

which

project

from

the

device,

farther

apart.

the

raster

tilted

angle,

may

straightened

loosen-

ing

the

deflection

yoke

locking

clamp

and

rotating

the

deflection

yoke.

FOCUS'

Adjust

the

fours

control

(VR703)

for

best

overall

focus

the

test

pattern

(marked

with

the

symbol

"%").

Usually

the

center

and

corners

the

screen

not

focus

the

same

setting

and

compromise

must

made.

BRIGHTNESS

Adjust

subbrightness

control

(VR301)

for

visual

cut

off

the

raster

when

external

brightness

turned

maximum.

VERTICAL

SIZE

AND

LINEARITY

ADJUSTMENT

The

vertical

size

control

(VR602)

should

adjusted

for

the

picture

fill

the

screen

vertically,

the

linearity

control

(VR603)

should

adjusted

for

best

overall

vertical

lineari-

ty.

Adjustment

either

control

will

not

affect

the

adjustment

the

other.

HORIZONTAL

SIZE

AND

LINEARITY

ADJUSTMENT

The

horizontal

size

control

(L702)

located

the

main

PCB,

should

adjusted

for

the

picture

fill

the

screen

horizon-

tally,

the

linearity

control

(L703)

should

adjusted

for

the

best

overall

horizontal

linearity

adjustment

neither

con-

trol

will

affect

the

adjustment

the

other.

PINCUSHION

AND

BARRELLING

a.a':

1.5

max.

b.b':

1.5

max.

fa'

-a':

3.0

max.

-b:

2.0

max.

TRAPEZOID

c.c':

1.5

max.

—

____04

d.d':

1.5

max.

1 1

1...

4--

---------

b-b':

2.0

max.

---------------------

PARALLELOGRAM

YORK

TILT

Active

video

CRT

Fig.

Geometry

Measurements

-d:

2.0

max.

1°

max.

—

missing page 5

missing page 6

missing page 7

(

SOUND

INPUT

VERT.

SOUND

AMP.

TDA1170D

SOUND

S.P

MAIN

SYNC.

71.2Hz

VIDEO

INPUT

VERT.

OSC.

VERT.

AMP.

VERT.

OUTPUT

12V

GND

12V

GND

12V

REGULATOR

HOR.

SYNC.

35.7KHz

VIDEO

AMP.

CONTRAST

BRIGHTNESS

MONO

STABLE

CIRCUIT

VIDEO

OUTPUT

V.Dy

ASTABLE

CIRCUIT

HORIZ.

DRIVE

CRT

H.DY

HORIZ.

OUTPUT

220V

50Hz

12KV

F.B.T

CI)

H.SYNC

25pS

VIDEO

BLANK

V.SYNC

VIDEO

BLANK

35pS

0.1.--20pS

0.5pS-01

-3.5pS

-01

14.0845mS

1.50S

—H

.41-1Lines-•-.4

(0.0281mS)

(0.9558mS)

Lines

500

Lines

(14.056mS)

(O.506mS)

(0.84338mS)

(1.855mS)

400

Lines

He—

—66

(11.245mS)

TIMING

CHART

HORIZONTAL

TIMING

VIDEO

10.5uS

0.4

6uS

40uS

SYNC.

5uS

7uS

4.5uS

15.75KHz

(63.5uS)

VERTICAL

TIMING

VIDEO

1.396mS

ill

1.1134mS

12.7mS

1.41mS

0.19mS

SYNC.

0.19mS

---04

1.016mS

60Hz

(16.69mS)

108

NOTES

SIGNAL

INPUT

LEVEL:

1Vp-p

TIME

TOLERANCE:

*0.1%

THE

MONITOR

ADJUSTED

ACCORDING

THE

ABOVE

TIMINGS

AND

FREQUENCY.

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