ViewSonic VG181 Manuale utente

VIDE-V27608

Service

Manual

ViewSonic

VG181

Model

No.

VLCDS21594-1

18”

Color

TFT

LCD

Display

VG181_SM_104

Rev.

—

September

2005)

ViewSonic®

381

Brea

Canyon

Road,

Wainut,

California

91789

USA

(800)

888-8583

1998

ViewSonic

Corporation.

Alf

rights

reserved.

part

this

publication

may

reproduced,

transmitted,

transcribed,

stored

retrieval

system,

translated

into

any

language

computer

language,

any

form

any

means,

electronic,

mechanical,

magnetic,

optical,

chemical,

manual

otherwise,

without

the

prior

written

permission

ViewSonic

Corporation.

Disclaimer

ViewSonic

makes

representations

warranties,

either

expressed

implied,

with

respect

the

contents

hereof

and

specifically

disclaims

any

warranty

merchantability

fitness

for

any

particular

purpose.

Further,

ViewSonic

reserves

the

right

revise

this

publication

and

make

changes

from

time

fime

the

contents

hereof

without

obligation

ViewSonic

notify

any

person

such

revision

changes.

Trademarks

ViewSonic

registered

trademark

ViewSonic

Corporation.

All

other

trademarks

used

within

this

document

are

the

property

their

respective

owners.

Revision

History

Description

Changes

Approval

9/15/00

Initial

Issue

—

DCN683

—_

;

VG181

Service

Manual

TABLE

CONTENTS

PRECAUTIONS

AND

SARETY

NOTICES

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slabs

SPECIFICATIONS

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dgvechestents

ides

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Citta

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sheteceadsaxds

SCREEN’

DISPICAY

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den

Sects

enh

easiness

FACTORY

PRESE

P-TIMINGS

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PASSIGNMEN

TES

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ise

ccusdui

esses

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artorsa

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7~8

MAIN

BOARD

CONNECTIONS

ou.

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THEORY.

‘ORERA

TION

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suaseseoats

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10~32

WAVEFORMS

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oud

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33~39

TROUBLESHOOTING

GUIDE

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40~44

SPARE

PARTS

LISD

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docks

COMPEETE

PARTS:

DIS

Viivagucs.

of.

ccdedaccazsesseetacgasiocuectesutueds

svetesesosodsecsentoal

sdeus

vabelappaceessstuvesss

caiieereeed

46~62

SCHEMATIC

DIAGRAMS

oic2c50.

scuba

saviaartvannarsseseveurea

satnede

oSensanabetetlactetedbsrtermtezentusaseecaetiel

alias

63~69

EXPLODED

VIEW

AND

PARTS

LIST.

.......ccsccsssssssssssssssssatsssscsossnsersenscaceeacseseseerseseseessenseeneeasensecsensnem

outs

PRIS

ORDEAL

LAD

EOL

NEY

EEE

IARI

LEA

NOVEL

ADELA

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OIE

TEE

ELE

CLIN

iii

VG181

Service

Manal

Service

Manual

ViewSonic

VG181

July

2000

Version

1.0

VIEWSONIC

CORPORATION,

2000

All

Rights

Reserved.

IBM

and

IBM

products

are

registered

trademarks

International

Business

Machines

Corporation.

Macintosh

and

Power

Macintosh

are

registered

trademarks

Apple

Computer,

Inc.

ViewPanel,

ViewSonic,

the

three

birds

logo,

OnView,

ViewMatch,

and

ViewMeter

are

registered

trademarks

ViewSonic

Corporation.

VESA

registered

trademarks

Video

Electronics

Standards

Association.

DPMS

and

DDC

are

trademarks

VESA.

Energy

Star

registered

trademark

the

Environmental

Protection

Agency

(EPA).

Disclaimer

ViewSonic

Corporation

shall

not

liable

for

technical

editorial

errors

omissions

contained

herein

;

nor

for

incidenta!

consequential

damages

resulting

from

furnishing

this

material,

the

performance

use

this

product.

the

interest

continuing

product

improvement,

ViewSonic

Corporation

reserves

the

right

change

product

specification

without

notice.

Information

this

document

may

change

without

notice.

part

this

document

may

copied,

reproduced

transmitted

any

means

for

any

purpose

without

prior

written

permission

from

ViewSonic

Corporation.

FCC

INFORMATION

This

equipment

has

been

tested

and

found

comply

with

the

limits

Class

digital

device,

pursuant

part

the

FCC

Rules.

These

limits

are

designed

provide

reasonable

protection

against

harmful

interference

residential

installation.

This

equipment

generates,

uses

and

can

radiate

radio

frequency

energy,

and

not

installed

and

used

accordance

with

the

instructions,

may

cause

harmful

interference

radio

communications.

However,

there

guarantee

that

the

interference

will

not

occur

particular

installation.

this

equipment

does

cause

unacceptable

interference

radio

television

reception,

which

can

determined

turning

the

equipment

off

and

on,

the

user

encouraged

try

correct

the

interference

one

the

following

measures

reorient

relocate

the

receiving

antenna;

increase

the

separation

between

equipment

and

receiver;

connect

the

into

outlet

circuit

different

from

that

which

the

receiver

connected.

FCC

WARNING

assure

continued

FCC

compliance,

the

user

must

use

grounded

power

supply

cord

and

the

provided

shielded

video

interface

cable

with

bonded

ferrite

cores.

Also,

any

unauthorized

changes

modifications

Amtrak

products

will

void

the

user's

authority

operate

this

device.

Thus

ViewSonic

Corporation

will

not

held

responsible

for

the

product

and

its

safety.

CERTIFICATION

This

device

complies

with

the

requirements

the

EEC

directive

89/336/EEC

with

regard

“Electromagnetic

compatibility.”

SAFETY

CAUTION

Use

power

cable

that

properly

grounded.

Always

use

the

cords

follows

—

USA

(UL);

Canada

(CSA);

Germany

(VDE);

Switzerland

(SEV);

Britain

(BASEC/BS);

Japan

(Electric

Appliance

Control

Act);

cord

that

meets

the

local

safety

standards.

Page

Confidential

Not

Copy

ViewSonic

Service

Manual

July

2000

Version

1.0

VG181

FEATURES

The

VG181

world

class

TFT

LCD

display

that

includes

the

following

features.

Digital

Screen

Display

Controls

User

friendly

buttons

(71),

Select

(w/

(2),

Power]

allowing

for

picture

perfect

quality.

Users

can

define

display

modes

reset

default

settings.

The

main

contains

Contrast

Brightness

;

Image

Adjust

;

Viewmach

Color;

Advanced

;

Setup

;

Memory

Recall

and

Exit.

Power

Supply

Support

The

separate

adapter

accepts

voltages

from

90~264

Vac

(Universal),

allowing

for

full

range

input

sources.

Power

Saving

System

This

environmental

friendly

product

can

reduce

power

consumption

than

95%

the

Active

Off

mode.

Frequency

Range

The

display

can

support

video

standards

from

VGA

SXGA,

with

Horizontal

frequency

range

from

30~82kHz

and

Vertical

frequency

range

from

50~75

Hz.

Page

Confidential

Not

Copy

Service

Manual

SPECIFICATIONS

LCD

Pane!

Maximum

Viewing

Angles

Signal

Input

Connector

Maximum

Resolution

Video

Bandwidth

Display

Area

Power

Voltage

Power

Consumption

Operating

Conditions

Storage

Conditions

Dimensions

ViewSonic

July

2000

Version

1.0

18.1

inch

diagonal

viewable

screen,

Anti-glare

TFT

Active

Matrix

Panel,

0.2805mm

pixel

pitch

Horizontal

160°CR>10

Vertical

160°CR>10

Video

RGB

analog,

0.7/1.0

Vp-p,

ohms

Composite

Sync,

Separate

Sync,

Sync

Green,

fp:

30-82

kHz,

fy.

50-75

Analog

Mini

D-Sub

Digital:

DVI_D

1280x1024

135

MHz

nominal

359.00

(H)

287.2

(V)

90~264Vac

50/60

(auto

switch),

12Vdc

max.

Temperature

:32

104

)

Humidity

10%

90%

(no

condensation)

Altitude

10,000

feet

Temperature

:-4

to+140

(-20

to+60

)

Humidity

10%

90%

(no

condensation)

Altitude

40,000

feet

Physical

460mm

(W)

458.8mm

(H)

240mm

(D)

10.0

kgs

Page

Confidential

Not

Copy

ViewSonic

July

2000

Version

1.0

SCREEN

DISPLAY

Service

Manual

VG181

The

OSD

(On

Screen

Display)

function

supported

and

controlled

four

easy

use

buttons

-{1],

Select

Conitrast/

Brightness

Image

Adjust

Viewmaitch

Color

Advanced

Set

[2],

Power.

Contrast

Brightness

Auto

Tune

H/V.

Position

Size

Phase

Zoom

Color

Temp

Select

User

Color

Scaling

Sharpness

ViewMeter

Input

Select

Language

Select

OSD

Position

OSD

Timeout

Page

Confidential

Not

Copy

Service

Manual

ViewSonic

VG181

July

2000

Version

1.0

FACTORY

PRESET

TIMINGS

These

timings

are

preset

for

the

analog

digital

Timing

Horizontal

Vertical

________—|_Polarity

{Frequency}

Polarity

Frequency

VGA

640x350

31.47

kHz

70.09

VGA

720x400

31.47

70.08

VGA

640x400

31.47

70.09

VGA

640x480

31.47

59.94

VESA

640x480

37.86

72.81

VESA

640x480

37.50

75.00

MAC

640x480

35.00

66.67

VESA

800x600

35.15

56.25

VESA

800x600

37.88

60.32

VESA

800x600

48.08

72.19

VESA

800x600

46.88

75.00

MAC

832x624

49.72

74.55

VESA

1024x768

48.36

60.00

VESA

1024x768

56.48

70.07

VESA

1024x768

58.04

71.92

VESA

1024x768

60.02

75.03

MAC

1024x768

60.24

74.92

VESA

1280x1024

68.981

60.02

VESA

1280x1024

79.98

75.03

VESA

1152x864

67.50

75.00

VESA

1280x960

60.00

Composite

Page

Confidential

Not

Copy

ViewSonic

July

2000

Version

1.0

ASSIGNMENT

Service

Manual

VG181

The

analog

input

uses

Mini

D-Sub

connector.

Green

Blue

Ground

R-Ground

G-Ground

B-Ground

Connection

Ground

Connection

(SDA)

H-Sync

(Composite

Sync)

V-Sync

(SCL)

Page

Confidential

Not

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Service

Manual

VG181

ASSIGNMENT

The

digital

input

use

DVI_D

connector.

Logic

Ground

Reserved.

connection

Reserved.

connection

DDC2B

Clock

DDC2B

Data

Reserved.

connection

MAN

FWD

—

—_,

Logic

Ground

Reserved.

connection

—_

ie)

Reserved.

connection

=_—

Power

Logic

Ground

SENSE

Pin,

Pull

High

ces

Logic

Ground

fo)

Reserved.

connection

Reserved.

connection

nN NO

Logic

Ground

WwW

Description

TMDS

negative

differential

input,

channel

TMDS

positive

differential

input,

channel

TMDS

negative

differential

input,

channel

TMDS

positive

differential

input,

channel

TMDS

negative

differential

input,

channel

TMDS

positive

differential

input,

channel

TMDS

positive

differential

input,

reference

clock

TMDS

negative

differential

input,

reference

clock

Page

Confidential

Not

Copy

ViewSonic

July

2000

Version

1.0

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