ViewSonic 21PS User manual

Service

Manual

Multi-Scan

Color

CRT

Display

MODEL

NO.

2182PS

ViewSonic

21PS

CONTENTS

SAFETY

PRECAUTIONS.

1

SERVICE

WARNING

2

GENERAL

INFORMATION

2

SPECIFICATIONS

2

DIMENSIONS

12

DISASSEMBLY

INSTRUCTIONS

‘4

CONTROL

LOCATION

v

CAUTION

FOR

ADJUSTMENT

AND

REPAIR

18

CAUTION

FOR

SERVICING

8

ADJUSTMENT

AND

CHECK

PROCEDURE

19

ADJUSTMENT

SOFTWARE

Pa

SERVICE

ADJUSTMENT

CONTROL

LOCATION.

ai

REQUIRED

ADJUSTMENT

PROCEDURE

AFTER

A

PARTS

IS

REPLACED.

ai

ADJUSTMENT

PROCEDURE

23

BLOCK

DIAGRAM

36

CONDUCTOR

VIEW

4a

SCHEMATIC

DIAGRAM

49

TROUBLE

SHOOTING

HINTS

6)

EXPLODED

VIEW

69

REPLACEMENT

PARTS

LIST

70

ViewSonic

1

CAUTION:

No

madiiication

of

any

circuit

should

be

attempted.

Service

work

snould

only

be

performed

ater

you

are

thorougriy

familia:

witn

ail

of

the

followeng

safety

checks

ang

servicing

guide

lines,

2

SAFETY

CHECK

‘Care

shoule

be

taken

while

servicing

this

CRT

cisolay

because

of

the

high

voltage

used

in

tne

deflection

circuits,

These

voltages

are

exposed

in

such

areas

as

tne

associated

flyback

and

yoke

circus,

3.

FIRE

&

SHOCK

HAZARD

2:1

insert

an

isolation

transformer

between

the

CAT

sisplay

and

AC

power

line

before

servicing

ihe

chassis

2:2

In

servicing

pay

attention

to

original

lead

dress

especially

in

the

nigh

voltage

circuit.

if

a

short

circut

is

found.

repiace

all

parts

which

have

been

overheated

as

a

result

of

the

short

cxcut

3.3

All

the

protective

devices

must

be

reinstalled

cer

orginal

design

2-4

Solgering

must

be

inspected

for

possible

cold

solder

joints,

frayed

leads.

damaged

insulation,

solder

splashes

or

sharp

solder

points.

Be

certain

to

remove

all

foreign

material

4

LEAKAGE

CURRENT

COLD

CHECK

4-1

Unplug

the

AC

cord

and

connect

a

jumoer

between

the

two

prongs

on

the

piug

4.2

Turn

tne

CRT

display

power

swten

“on”

4-3

Measure

the

resistance

value

with

an

ohmmete:

between

the

jumoered

AC

olug

and

each

exposed

metalic

part

on

the

CAT

cisplay

such

as

the

metal

frame,

screwneads,

control

sha‘ts.

etc.

When

the

exposed

metailic

part

has

a

return

patn

10

the

chassis,

the

teading

shoul

be

1.8

megonm

rrunirtum,

5

LEAKAGE

CURRENT

HOT

CHECK

Plug

the

AC

cord

cirectly

into

the

AC

outlet.

Do

rot

use

an

isolat

on

transformer

curing

tnis

check

5-2

Connect

a

1500

ohm.

10

watt

resistor.

paralleled

Dy

2.0

15

capacitor

between

each

exposes

“metallic

part

and

a

gcod

earth

ground

(as

shown

1

Fig

1)

5:3

Use

an

AC

voltmeter

with

1000

ohmvoit

or

more

sensitivity

and

measure

the

AC

voltage

across

tne

combination

1500

ohm

resistor

anc

0.1SuF

capacitor

5-4

Move

the

resistor

connection

to

each

excosed

metallic

part

and

measure

the

vollage

5:5

Reverse

the

polarity

of

the

AC

plug

in

the

AC

outlet

and

repeat

the

above

measurement,

5.6

Voltage

measured

must

not

excead

7.

voit

AVS

from

any

excosed

metallic

cart

10

ground

A

leakage

cutter

tester

may

be

used

in

the

above

not

chec*

In

whicn

case

any

current

measured

must

ro:

eed

5.0

miliame

In

the

case

of

a

measurement

ed

ng

tne

$

0

miliiams

value,

a

rework

is

19

eliminate

the

chance

of

a

shock

hazard,

SAFETY

PRECAUTIONS

Nowe:

High

votage

is

present

when

this

CRT

csply

i

operating,

Aways

discharge

tne

anade'of

he

picture

tube

tothe

display

chassis

to

prevent

shock

hazard.

mae

wary

a

"ShoUND}

Rerguenrs

Bia

eee

Sera

Pears,

Saat

ae

Fig.1

6

IMPLOSION

PROTECTION

Al)

ViewSonic

picture

tubes

are

equipped

with

an

integral

implosion

protection

system,

but

care

should

be

taken

to

avoid

damage

and

scratching

during

installation.

Use

only

ViewSonic

replacement

picture

tubes

7

X-RADIATION

WARNING

:

The

only

potental

source

of

X-Radiation

is

the

picture

tube.

However

when

the

nigh

voltage

circutty

§

operating

oroperly

there

is

no

possibiity

of

X-

Radiation

problem.

The

basic

precaution

which

must

5¢

exercised

1s

to

keep

the

high

voltage

at

she

following

factory-recommended

level

Note:

It

is

mportant

to

use

an

accurate

periodically

calibrated

nigh

voltage

meter.

#88

IMPORTANT

SAFETY

NOTICE

“4%

ete

are

special

components

used

in

this

CAT

|

displays

which

ate

important

for

safety

These

i:

paris

ate

identifies

by

tne

ternational

symoo!

As

|

fon

the

schematic

diagram

and

on

the

replacement

carts

list.

It

1

essential

that

these

critical

parts

should

be

replaced

wiin

manufacture’s

specified

parts

to

prevent

X-

RADIATION,

shock,

fire

or

cher

hazards.

Do

not

modity

ine

original

design

without

written

permission

of

the

ViewSonic

Corp.

Company

2

on

ams

wil

voic

the

onginal

parts

ang

labor

guarantee

SERVICE

WARNING

TO

PREVENT

RISK

OF

ELECTRIC

HAZARD,

TEST

BEFORE

TOUCHING.

Where,

after

operation

of

the

fuse

in

the

live

side

of

the

mains

supply,

some

components

of

the

equipment

that

remain

under

voltage

might

represent

a

hazard

during

servicing.

GENERAL

INFORMATION.

4,

OUTLINE

2182PS

is

21

ich

(20°V)

multi-scan

color

CRT

display

2-5

Ergonomic

design

witn

the

following

nice

features,

+

Low

emission

design

to

meet

MPR

O80

(on

sereen

display]

Control

is

newly

insreduced,

‘ESF

(Electro

stauc

hela)

free

coating

on

CAT

wwhich

alows

easy

user

adjustment.

2-6

Muti

scan

win

digital

technology

Power

saving

function,

which

helps

saving

energy.

is

8

bit

micro

computer

controls

the

circuit

operat.on

also

one

of

the

nghlights

of

this

model

to

meet

with

wide

range

signal

of

f.=30~82kHz

and

2,

FEATURES

fy

=50~160Hz.

So

VGAG40x350,

VGA640x400

2.1

Power

Saving

VGAG40x480,

SVGABOOx600,

1024x768,

1152x900

+

Built

in

Power

Saving

function

Dased

on

VESA

1280x1024

and

1600x1280

mode

are

applicable

DPMS

standard

2:7

B

Factory

presets

(3

preset

+

5

reservation),

13

+

Power

energy

shail

be

saved

by

controlling

the

user

memories

circult

in

accordance

with

power

save

signal

trom

+8

standard

modes

are

preset

at

tne

factory

{3

computer.

preset

+

5

reservation

mode)

2:2

OSD

function

+

13

user

memories

are

available

to

set

the

users

own

*

OSD

(on

screen

display)function

is

new

and

timing

ang

display

information

excellent

man-machine

interface.

2.8

Flat

Face

and

fine

cot

pitcn

Any

one

1s

able

to

set

up

the

picture

as

he

like

*

Flat

face

CRT

with

fine

ot

pitch

0.2mm

gves

a

through

OSD

menu

comfortable

sight

of

the

screen

2.3

Self

Test

function

2-9

Superior

display

performance

*

Self

Testing

picture

comes

out

by

pusning

[1]

key

*

Good

focus

by

sophisticated

gun

and

ayramic

in

the

case

of

no-connection

witn

computer

ot

focus

ercuit

power

saving

operation

*

High

onightness

This

function

shows

if

monitor

is

alive

or

not

and

can

+

Mnimized

distortion

by

correction

circut

bbe

used

for

seit

aging

test

+

Good

convergence

2.4

Power

Supply

with

hign

power

factor

‘+

Users

enjoy

full

scan

image

‘or

graphics

+

Power

Supply

with

high

power

factor

erabies

te

utilize

AC

power

efficiently

and

st

will

meet

\ECSS5-2

SPECIFICATION

1,

DIAGRAM

—{S0c06

om

$

3

eal

v

son

5

3.1

POWER

SW,

LED,

|1-key

(MENU).

7-xey

(COWN}

SELECT.

HIV.

MOIRE

REDUCTION,

ROTATION

Okey

(UP),

and

[2)-key

(ENTER)

are

located

on

che

DISPLAY

=PEQUENCY.

RECALL

front

panel

‘+

CONTRAST

corrolied

wih

Vidwey

3.2

Signat

connectors

arg

AC

inlet

are

‘oca:ec

on

che

n

be

anecty

ie

ack

side

of

she

cabinet

pushing

'2hkey.

33.

OSD

menu

include:

9g

func

SONTRAST.

BRIGHTNESS.

Hi

SI

POS

TICN

V

PIN-CUSHION.

“AAPEZOIC

CEGAUSS.

PARALLE_OGRAM

COLOR

SELECT

USER

COLO,

VIDEC

INPUT

LEVEL.

VIDEC

/NPUT

ah

sync

sigral

OSD

menu

apc

1

ey

vs

by

pushing

2.

MECHANICAL

SPECIFICATIONS

refer

to

tne

attacnec

crawing

2.1

Dimension

Height

:

£78

mm

(188°)

3p.

Wicth

:

$05

mm

(19.9°)

yp.

Depth

:

$10.mm

(20.17)

yp.

22

Net

Weight

28.0kg

(58.5

Ibs)

typ.

3.

CONNECTORS

21

Signal

connector

1SP

Mini

D-Sub

X

1

BNC

connector

X15,

3.2

AC

inlet

CEE

22

typed

connector

18P

Mini

D-SuD

assignment

1...

RED

6..GROUND

11...

GROUND

2...

GREEN

7..GROUND

12...

-

(OPEN)

3...

BLUE

@..GROUND

13...

HSYNC.

4,

GROUND

=

9...-(OPEN)

14...

VSYNC.

5.

=(OPEN)

—10..,GROUND

15...

-

(OPEN)

4,

CAT

SPECIFICATIONS

Part

No.

Mas

tKy¥1a0x

Type

21"

(19

67

viewable)

agonal

Dot

Prich

0.35

mm

Phospnor

RG.

8

Shon

Persistence

=

ETE)

TDARK

TINT

Face

‘AGRAS

COAT

Total

Transmission

39.5%

5.

ELECTRICAL

SPECIFICATIONS

$.1

Standard

conditions

..

Except

special

items

(Green,

fol

WF

characters

with

a

border

Icing.

(7

x

9

dots)

Video

sigan!

100%

duty

display

area

380mm

x

285mm

Viaeo

signal

level_[0.7Vpp

Cenwasr,

Gughiness

[Conurast

Max,

Baghiness

_cenfer

pont

‘Amoent

Temperature

20

+

5*C

(68

=

9°F)

Mputvoliage

[AC

120v,

602

Fahey

va|vencalfea

comer

Tesral

magne}

onzoral

tld

ro

Viewing

decton

[Paraliel

othe

CAT

ans

‘Aller

an

inital

warming

up

ime

el

more

than

30

minutes

200250

1%

[

MODE?

1008

x

768

(ed

onne

TSR)

Display

mage

Measurements

abe

Tig

Dispiay

moce:

5.2.1

Power

supaly

.

Commercial

power

5

Trout

age

ul

current

Tnrush

cutentiai

20°C)

|

«0

Aon

Power

consumotion

TOW

(Ty!

(71)

Input

current

is

reduced

to

about

60%

of

cur

current

products

oy

“High

Power

Facto”

technology.

5.2.2

Power

Management

for

Power

Saving

Power

saving

system

is

designed

bases

uson

\VESA

DPMS

Standard

(Version

1.0)

1)

Power

consumption

and

recovery

time,

rr

=

TIER

ESOT

me

|

_[S

ae

e

er

See

[sre

oye]

wae

fio

|

See

Bafa

ON

|

NOR

|

NOR.

JacTvE)

ro

|

—

|

Green

wa

|

wal

|

090

stano-lirest|,

selaranc

|

«200

|

cas

|

veto

|S

‘ee

‘sus.

Sco

|

rane

(8

Loum

|

cao

|

cas

|

oe

"The

transition

me

trom

ON

state

to

each

‘APM

states

is

$

seconds

minimum,

“1:

APM:

Advanced

Power

Management

"2:

Meas.

Condition

of

power

consumation

for

ON

state

DISPLAY

IMAGE

|

WHITE

full

with

a

Dorder

ine

(7X

9

dots).

"3:

NORMAL

:

see

°S

4

ACCEPTABLE

TIMING’

"4:

Power

Consumption

is

measured

at

AS

100:

2a0v,

*5:

Power

saving

operation

is

done

at

least

less

than

specifies

value

in

the

Ist

*

characters

5.3

Standard

timing

*

Following

total

8

modes

are

creset

in

the

memicry

as

standard

timing

at

the

factory.

=

Refer

to

Fig.

2

as

a

defintion

of

tming

and

signal

level.

‘*

This

SPECIFICATION

is

specified

at

STD

(1024

x

768)

mode

unless

otherwise

mentionec

TIMING

CHART

VIDEO

8

O.7/1.0V

A

I

Period

abi.

8

[Blanking

e

C

[Syne

Wiath

2

Z

1D

[Back

Porch

HIV

SYNC

E

[Active

ae

F

[Front

Potch

S

‘

—————“

Fig.2

A

FOR

PRESET

MODE

-

1

MODE

-

2

MODE

-

3

640

X

480

(60)

7024

X

768

(75)

7280

X

1024

(75)

DOT

CLOCK

25.1748

_

MAE

138.0000_

MHz

V

|C=SYNC

WIDTH

—

iD

-

BACK

PORCH

79.9763

KHz

(1,688

dots

)

FOR

RESERVATION

RONT

PORCH

“|

“0.318

ms

(10

ines)

|

0.017

ms_(_

“oorsms

(1

Wes)

'SYNG

POLARITYIHY)

8

Positive

Postive

Poxtive

/

Positive

iD-

BACK

PORCH

—_

|

6.49

ys

2.032

ps

3.810

us

MODE

-

4

MODE

-

5

MODE

-

6

G40

X

480

(75)

‘B00

X

600

(75)

7024

X

768

(70)

DOT

CLOCK

31.5000

MHz

49,5000

_

MHz

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|

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0122

He

76.060

ms

{500

ines

)

0.497

ms

(

_&t

nes)

0036

ms

(Sines)

0376

ms

(

35

ines)

S563

ms

(459

ines)

08s

ms

(__7

ines)

‘SYNC

POLARITYIHIV)

Negative

F

Negative

F-FRONT

PORCH

|

0.102ms

(3

ines)

0077

ms

(Sines)

‘SYNC

POLARITY(HA)

Negative

/

Negative

ate

/

Negative

FOR

ADJUSTMENT

5

[BOT

CLOCK

7345800

fH

‘82.5061

KHz

A-

PERIOD

12120

ps_(

1,636

dots

)

5.4

Acceptabie

timing

5.4.1

IF

your

tming

is

wethin

foslowing

specificanon,

mnis

CRT

qisplay

can

automatically

function

with

2

cerain

size

ang

position.

orzontal:

Syne

frequency:

30.0

~

820

kHz

Blanking

Time:

2

30

uS

Back

Porch:

2

1.25

uS

Front

Porch:

$

Back

Porch

Sync

Width:

2

1.2uS

Vertical:

Syne

treauency:

$0.0

~

1600

Hz

Blanking

Time:

2

0.5

mS

Back

Porch:

20.5

mS,

Syne

Width:

2

0.045

mS

5.4.2

+

Several

items

like

size.

position

and

distortion

can

be

adjusted

througn

OSD

menu,

and

it

you

want

to

keep

it,

please

push

the

key

[IJ

for

memory.or

keep

the

key

untouched

for

about

20

seconds,

its

automatcally

memorized,

NOTE:

19

case

of

RECALL,

the

keys

1s

un-

touched

for

about

30

seconds,

RECALL

function

willbe

canceled,

Please

notice,

however,

that

there

is

the

case

you

can

mot

get

the

size

andlor

position

you

want,

{lor

example

Display

Time

is

too

short,

then

you

Can't

get

digger

size

of

the

image.)

5.43

The

CRT

adopted

in

this

CRT

display

is

designeo

to

minimize

the

moire

phenomenon

at

suitable

size

for

typical

display

modes.

However,

there

might

be

a

display

format

among

many

formats.

in

which

the

moire

phenomenon

appears

on

this

display

55

Signal

level

and

input

impedance

5.5.1

Video

signal

level

+»

This

CRT

display

is

adjusted

at

the

factory

using

0

7Vp-p

video

signa’,

Black

level

is

OV

‘This

CRT

display

is

compatible

with

1.0Va-p

video

signal

by

using

video

input

level

secton

in.

OSD

function

5.82

Sync

signal

level

+

HIV

Separate,

HV

Mixed

TTL

level

«Syne

on

Green

0.286

Vop

55.3

Input

mpedance

Video

input:

750

Sync

input

2

1

5.6

Display

performance

5.6.1

Dsclay

area

ET

TIMING.

WIDTH

380mm

+

5mm.

HEIGHT

:

285mm

+

Smm.

MODES

WIDTH:

355mm

+

$mm

HEIGHT

:

284mm

+

Smm_

2)

RESERVATION

TIMING

MODE4~7

WIDTH:

380mm

+

7mm.

HEIGHT

:

285mm

+

7mm

MODES:

WIDTH:

365mm

+

7mm.

HEIGHT

:

24mm

+

7mm

3)

DISPLAY

AREA

(Full

scan)

WIDTH;

402mm

HEIGHT

:

301mm.

5.62

Centering

1)

PRESET

TIMING

(MODE

1-3)

1A-B1s

4mm

'C-Dis4mm

2)

RESERVATION

TIMING

(MODE

4-8)

1A-BIS7

mm

IC-Dis

7mm

¢

Edge

of

bezei

5.6.3

Distortion

$63.

a)

Trapezoid

1AC-SDI

<

2.5mm

1A8

-

COI

$

2.5mm,

A

8

c

.

)

Paralielogram

aosaem

3

¢

Pincustion

anc

barrel

Iou,ical

s25mm

ath

Ida

$20

Sees

ao

2

eaten

5.6.4

Rotation

IH1-Hal

s2.5mm,

5.65

Lineanty

Honzontal

linearity

Xmax.

=

X

min

=

RRR,

xX

max.

+

X

min,

scloowse%

Vertical

inearity

Y

max,

~

Y

min.

=

TREE

TY mn

*

100%

$

6%

|

Ms

neve

x

Conditions

Display

image

-

crossnaten

pattern

Maxmum

anc

minimum

values

shoule

net

be

adjacert

to

each

other

Xmax.

igmaximum

value

among

X1~-Xm

Xm.

igminmyum

value

among

X1~Xr

Y

max.

is

maximum

value

among

Y1~Yn

Ymin,

isminimum

value

among

Y1-¥n

5.7

General

performance

5.7.1

Video

output

[Bancwictn

|

_135MHz

(Typ)

5.7.2

Maximum

luminance

T20

cam

(min

Vor

5%

whe

fied

at

the

center

of

tne

display

area

100cd/m*

(min

}

for

100%

white

field

at

the

center

of

the

display

area.

Specified

by

9300K

+

27MPCO

Conditions

|

Luminance:

Max.

(Contrast:

Max.)

(Brightness

:

Center)

58.7.3

Minimum

luminance

=

17

com

at

the

center

of

ne

cisslay

value

|

area

Specified

by

9300K

+

27MPCD.

Display

image

:

White

full

fat

field

Coravors

tummance

Mn.

(Canrast

Mn)

(Brightness

|

Center)

57.4

Brignmess

variation

Value]

70%

(Min)

Variation

=

CIA

X

100

Display

image

:

White

full

fat

fel

Luminance

=

MAX

(Contrast

:

MAX)

(Brightness

:

Cecter)

‘A:

Luminance

at

center

position

C:

Luminance

at

center

posttion

of

lowest

onghtress

Conditions

57.5

Display

area

regulation

Display

area

varaben

[Range

arose]

Due

to

within

1.0%

of

display

|

17-100

ca/m*

Luminance

_

[area

(white

flat

field)

Bue

to

|

with

1.0%

of

asplay

[AC

00

132V

Power

Supply

area

or

180-264V

Due

to

within

1.5%

of

display

[0

-

40°C

Temperature

|

area

$.7.6

Color

Point

<

Conditions

>

Display

image

:

White

flat

field

at

the

center

of

the

cisplay

area.

Luminance

Brightness

Center

‘9300K

+

27

MPCD

Value

x=

0.281

£0.020

y=0.311

+0,020

5.77

Msconvergence

Certer

area

of

cisplay

Comer

area

of

cispay

{A}

0.30

mm

(Max

}

(3):

0.40

mm

(Max)

x

®

Display

image

Crosshatch

pattern

mec

with

R.

G

and

8

colors

‘Convergence

gauge»

KLEIN

CM7AG

Display

image

WH

980

x

285mm

5.7.8

Punty

Conspicuous

mis-ianding

snall

not

be

visible

‘within

the

cisplay

area

at

a

distance

of

60cm

fram

CAT

surface.

Condvons:

Disolay

image

:

White

fiat

feld

Lumeance

—:

Contrast

max,

Brightness

Center

$7.9

iver

lnvistve

at

a

asiance

of

60

em

fiom

CAT

surtace

Conditions:

Display

image

.

White

tiat

field

Luminance

Contrast

max,

Brightness

Center

point

6.

ENVIRONMENTS:

6.1

Ambient

temperature,

humidity

and

altitude

Operating

Storage

and

shipment

Temperature

OF-40°C.

=20°=

60°C

(32°~104°F)

(-42=140°F)

Humidity

550%

35-30%"

Antuse

3000m

(Max)

12.000m

(Max.)

1

40.000

ty

(40,000

ft)

=Non-congensarion

62

Vibraton

and

shock

(1)

Wibraton

(2)

Snock

(Drop

test)

Tore

recisn

ai

o

sees

tess

worstor

oseraton

sine

i

T

Tee

=:

1

[verea

|

22

/

m8

unoacted

|

2

|

ws

|

Horizontal

3

T

Tome

1

+

|

vereeat

mr

psieis

|

(0G)

Logswees.

le

Front

to

!

Paes

|

2

et

|

sm

=

SSOMZ

«BOS

|

Honzonta

SS

ave

2ome

le

lok

|

[Uneacked

20

G

One

tre

for

each

lace

(6

faces)

(non

operation)

TNumoer

of

Time

7.

REGULATORY

STANDARDS

71

Safety

standards,

Applicable

standards

UL

1950,

Listing

CAS

22.2

No,

950,

Products

Certtication

Tuy

(IEC-950GS

(2H1)

CHHS,

21

CFR

suochapter

J.

X-Ray

Aadia:o>

PTB

X-Ray

Radiation.

Approval

Hw

7.2

EMC

standards

Designed

to

meet

following

standards

VOC

class

I!

FCC:

FCC

part

15,

subpart

8,

class-B

VOE

0878/06

83

Vig

2agir99¢

CiSPR22

cass

8

MPR.

Radiation

80

Power

Cord

UL

and

CSA

approved

AC

cower

co°¢

's

pu!

package

Leng:n

.

20

meter

af

y:

courtty

{lor

example

Germany).

please

use

3

cz

cord

azcroved

by

savety

agency

of

eact

(VDE

in

Germany)

use

in

Order

of]

Face

to

arop

is

to

ace

drop

_|

the

floor.

(see

the

figure)

[9

Packee

7

20.6009

Tem

i

[oem

for

eacn

bom)

cietons

9.0

Signal

Capie

Signal

cable

with

Mini

O-Sub

18P

cennecto’s

at

Dott

end

's

ou

m

package

Length

:

15

meter

10.0

Reliability

>

55.000

hrs

(Demonstrateg

MTBF}

<EMI

test

pattern>

Wonite,

full

“H”

characiers

(9

x

14

dots},

bck

24

dots}

"+"

character

font

is

as

follows

ViewSonic 21PS User manual

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