Sharp Vb-500/a/bg User manual

VB-500/A/BG

SHARP

SERVICE

MANUAL

SERVICE-HANDBUCH

\

red

SY5K5VB500G//

ELECTRONIC

WHITE

BOARD

ELEKTRONISCHE

SCHAUTAFEL

MODEL/MODELL

VB-500/A/B

iG

In

the

interests

of

user-safety

(Required

by

safety

regulations

in

some

countries)

the

set

should

be

restored

to

its

original

condition

and

only

parts

identical

to

those

specified

should

be

used.

tm

Interesse

der

Benutzer-Sicherheit

(verlangt

von

den

Sicherheitsvor-

schriften

einiger

Lander)

sollte

das

Gerat

wieder

auf

seinen

urspringli-

chen

Zustand

eingestellt

und

nur

die

vorgeschriebenen

Teile

verwen-

det

werden.

SECTION/TEIL

I

CONTENTS

ON

OARPWN>

1.

2.

3.

4.

5.

6.

7.

8.

SHARP

CORPORATION

B-500/A/BiG

IMPORTANT

SERVICE

NOTES

BEFORE

RETURNING

THE

ELECTRONIC

WHITE

e

BOARD

Before

returning

the

electronic

white

board

to

the

user,

perform

the

following

safety

checks.

1.

Inspect

all

lead

dress

to

make

certain

that

leads

are

not

pinched

or

that

hardware

is

not

lodged

between

the

chassis

and

other

metal

parts

in

the

electronic

white

board.

.

Inspect

all

protective

devices

such

as

non-metallic

control

knobs,

insulating

materilas,

cabinet

backs,

adjustment

and

compartment

covers

or

shields,

isolation

resistor/capacitor

networks,

mechanical

insulators

etc.

.

To

be

sure

that

no

shock

hazard

exists,

check

for

leakage

current

in

the

following

manner.

@

Plug

the

AC

line

cord

directly

into

a

200

~

240V

AC

outlet

(Do

not

use

an

isolation

transformer

for

this

test).

VTVM

©

AC

SCALE

O

O.15uF

TEST

PROBE

()

connect

TO

KNOWN

EARTH

TO

EXPOSEO

\

GROUND

METAL

PARTS

Using

two

clip

leads,

connect

a

1.5k

ohm,

10

watt

resistor

paralleled

by

a

0.15yF

capacitor

in

series

with

all

exposed

metal

cabinet

parts

and

a

known

earth

ground,

such

as

a

water

pipe

or

conduit.

Use

a

VTVM

or

VOM

with

1000

ohm

per

volt.,

or

higher,

sensitivity

to

measure

the

AC

voltage

drop

acros

the

resistor

(See

Diagram).

Move

the

resistor

connection

to

all

exposed

metal

parts

having

a

return

path

to

the

chassis

(antenna-

connections,

metal

cabinet,

screw

heads,

knobs

and

control

shafts,

etc.)

and

measure

the

AC

voltage

drop

across

the

resistor.

Reverse

the

AC

plug

(a

non-polarized

adapter

plug

must

be

used

but

only

for

the

purpose

of

completing

these

checks)

on

the

set

and

repeat

the

AC

voltage

measurements

for

each

exposed

metallic

part.

Any

reading

of

0.45V

rms

(this

corresponds

to

0.3mA

rms

AC.)

or

more

is

excessive

and

indicates

a

potential

shock

hazard

which

must

be

corrected

before

returning

the

electronic

white

board

to

the

user.

WARNING:

TO

REDUCE

THE

RISK

OF

FIRE

OR

ELECTRIC

SHOCK,

DO

NOT

EXPOSE

THIS

APPLIANCE

TO

WET

LOCATIONS.

VB-500/A/B

1.

FEATURES

1)

Remote

controlled

operation

2)

May

be

stopped

at

any

point

using

<J>

and

stop

keys.

3)

In

addition

to

1-frame

copy,

compressed

copying

is

AVAILABLE

for

A

2

frame

consecutive

copy

and

A

4

frame

copy.

4)

Direct

selection

of

A

desired

FRAME

1

to

5.

(FRAME

5

cannot

be

copied.)

5}

Additional

printing

can

be

made

even

after

comple-

tion

of

printing.

(Last

Copy

IN

MEMORY.)

2.

SPECIFICATIONS

WHITE

BOARD

Board

Surface

Size

92.0

x

128.0

cm

(36-742

x

50-%

inches)

Effective

Width

of

Board

Surface

88.0

x

124.0

cm

(34-242

x

48-1%6

inches)

Number

of

Frames

5

Frames

Number

of

Copyable

Frames

4

Frames

RECORDER

Recording

Paper

Heat

sensitive

recording

paper

Copy

Size

A4

size

(210

x

297

mm)

Copy

Speed

20

sec/sheet

(ist

copy)

10

sec/sheet

(From

2nd

copy)

5.9

dots/mm

1

~

99

(Number

of

copies

can

be

increased

by

pushing

the

addi-

tional

printing

key.)

Copy

Color

Black

Recording

Density

Number

of

Copies

Picture

Memory

One

white

sheet

(256

KB)

Outside

Dimensions

149.0

(W)

x

66.3

(D)

x

196.5

(H)

(58-232

xX

26-Ve

X

77-1V32

inches)

Weight

Approx.

65

kg

(143

LBS.)

Power

Source

AC200-—240V

(50/60

Hz}

Power

Consumption

Approx.

180

W

during

operation

BTU:

Approx.

90

W

during

stand-by

ACCESSORIES

Heat

sensitive

recording

Paper

..........cccesseeeseeeenenes

1

Markers

(Black,

Blue,

Red)

..........ccscccccccseessnseeeereees

1

Each

EASOR

eecsvcsuvstccaciecienisitevizsicesedtvasedivaiecgers

oussuatiauevedne

1

MQ

MG

t

sisi

ccccssetdicsecepaseciearcasseencand

covsscuvsaizeccesseviariasees

1

Remote

control

transmitter

..........ccccccssseeessreeeeeeenees

1

Battery:

sissivisvs

sostaseesssacsvsvess

indeessivedanvesscecswiasadecstess

cee

2

Instruction

Manual

o........

ce

eeeesssseesseeceereesesseseeeeseenes

1

Manual

for

Unpackaging

and

Assembly

...........

1

*Specifications

subject

to

change

without

notice

B-500/A/BIS

3.

EXTERNAL

COMPONENT

IDENTIFICATION

FRONT

White

Sheet

REAR

Recording

Paper

-

Cover

Printer

Cover

Tray

Ass’y

Part

‘A’

Tray

Ass’y

Part

‘B’

Magnet

Fixing

Area

?

Caster

Figure

1

RS

|

BSS

Printer

Cross

Bar

‘A’

AC

Power

Cable

Figure

2

4

Remote

Control

Signal

Receiver

Display

Remote

Control

Unit

Holder

VB-500/A/Bid

4.

INTERNAL

COMPONENTS

AND

OPERATIONAL

DIAGRAMS

CCD

PWB

&

OPTICAL

ASSY

Position

Sensor

Unit

Fluorescent

Lamp

Main

PWB

Power

Supply

;

PWB

—

Frame

Sensor

Unit

Figure

3

Internal

Component

Locations

Thermal

Printer

Electronic

Fluorescent

Lamp

Circuit

Sheet

Forwarding

tepping

Motor

eiPepne

~

Sheet

Rewinding

Stepping

WY

L

Motor

CCD

Ain

ae

-

Rolled

Sheet

Signat

Receiver

Operation

Panel

Remote

Control

Remote

Control

Signal

Transmitter

Figure

4

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Buiddars

¢¢

J

Bulpuimay

3884S

TayunoD

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Bunuig

uoljsoduwo7s

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Aejdsig

Stepping

Motor

Driving

Circuit

JOjuOD

ajOWeYy

{—

aqons

—

4ojo-:

Buiddais

Suipienios

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&

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5.

ADJUSTMENTS

MEASURING

INSTRUMENT

AND

TOOLS

Dual

Trace

Oscilloscope

Hexagon

Wrench

for

CCD

Adjustment

(JIGDRIVER-7)

1.

ADJUSTMENT

OF

MOTHER

PWB

DIP

SWITCHES

Switch

configuration

and

No.

ON

OFF

4;

C9

Location

of

dip

switches

on

motor

PWB~.

3!

cc

Figure

6

SPECIAL

TOOLS

Name

of

Switch

VB-500/A/Bi

Switch

Condition

OFF

ON

For

factory

setting

For

factory

setting

Normal/Checker

Normal

Checker

Code

Normal/Adjustment

Normal

Adjustment

Configuration

Hexagon

Wrench

for

CCD

Adjustment

JIGDRIVER-7

B-500/A/B&

ADJUSTMENT

PATTERNS

Set

to

the

bottom

of

the

sheet

and

stick

there.

(A)

(B)

Width

9mm

(Shallow

mark)

Draw

3~5

horizon-

tal

lines

with

a

red

marker

at

the

top,

center

and

bottom

of

the

sheet.

Adjust

to

the

sheet.

(C)

a

crossing

on

the

sheet

Draw

approx.

5cm

vertical

lines

with

a

marker

at

8mm

from

each

crossing,

at

the

top,

center

and

bottom,

in

the

left

side.

Figure

7

Draw

horizontal

line

with

a

mar-

ker

at

25mm

from

the

bottom

of

the

first

sheet.

VB-500/A/B

2.

FUNCTION

OF

CCD

PWB

COMPONENTS

AND

TEST

POINT

LOCATIONS

Main

PWB

GND

TP4

CCDOUTPUT

TP3

PR

Reference

pulse

for

read-out

range

(TP1)

[]

J

ue

Lens

holder

LPR

NB

RA

Figure

8

Angle

adjustment

plate

CCD

PWB

Adjustment

of

read-out

position

(angle

adjustment)

Adjustment

of

read-out

range

in

vertical

direction.

Keep

the

screw

Loose

and

turn

the

hexagon

nut.

Turn

the

hexagon

nut

while

keeping

the

rotational

adjustment

screw

Loose.

Figure

9

Angle

Adjustment

Plate

Light

Volume

Adjustment

Plate

Angle

Adjustment

ang

Screw

1

t

Lens

Fixing

Screw

Lens

1

od

NX

)

Lens

Focus

Adjustment

CCD

PWB

Lens

Holder

Franie

Figure

10

B-500/A/BG

3.

CCD

Adjustment

Pattern

Adjustment

Procedures

@

Preliminary

Adjustment

Turn

on

dip

switch

1

and

the

power

switch.

Check

the

output

waveforms

of

TP1

and

TP3

with

an

oscilloscope.

Oscilloscope

Range

0.5msec

2V/div

®

Make

a

preliminary

adjustment

of

the

lens

focus,

so

that

the

CCD

output

can

be

obtained

which

corresponds

nearly

to

the

reference

pulse

width

within

the

read-out

range.

Set

the

gain

control

at

Min

position.

Keep

the

light

volume

adjustment

plate

in

the

open

state.

Fix

each

screw

lightly.

Short-circuit

R223

and

R226

of

CCD

PWB.

Keep

the

optic

axis

at

lower

than

the

saturation

point

(to

ensure

no

variation).

@

Adjustment

of

Lens

(Focus

Dis-

tance)

short-circuit

R223

and

R226

Make

the

adjustment

so

that

the

checkers

of

the

white

sheet

or

the

marking

will

become

deepest

against

the

level

of

white.

Fix

the

lens

by

tightening

the

screws.

Oscilloscope

Range

0.5msec

2V/div

®

Adjustment

of

Read-Out

Range

Short-circuit

R223

and

R226.

Adjust

the

left

edge

of

the

TP1

pulse

to

the

marking

25

mm

dis-

tant

from

the

bottom

end

of

the

white

sheet

by

turning

the

hex-

agon

nut

@

of

Figure

9.

Then

fix

the

nuts

@

and

@.

TP1

Reference

pulse

-out

{

of

sheet

]

1

TP3

1

«

Signal

25

mm

mark

Make

adjustment

by

turning

the

hexagon

nut

of

CCD

PWB,

and

fi

j

Haadcubeanga

ix

after

adjustment.

Osilloscope

Range

0.2msec

2V/div

@

Adjustment

of

Optic

Axis

(Angle

Adjustment)

Short-circuit

R223

and

R226.

Turn

the

screw

©

of

Figure

9

until

the

mark

in

the

center

of

pattern

©

comes

down

to

the

lowest

posi-

tion.

When

viewed

from

the

lens

side,

the

read-out

position

is

8

mm

closer

to

the

board

from

the

area

brightened

by

reflection

of

fluores-

cent

lamp.

SS

Reference

pulse

Area

with

reflection

of

fluorescent

lamp

Make

adjustment

by

turning

the

angle

adjustment

screw

so

that

the

mark

in

the

middle

comes

to

the

center

of

waveform

(read-out

reference

pulse).

8mm

Adjustment

position

Osilloscope

Range

0.5msec

2V/div

10

Sharp VB-500/A/BG User manual

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