Sanyo PLC-400P User manual

F/LF

NO.

SERVtCE

MANUAL

Portab!e

LCD

Co!or

Video

Projector

Mode)

no.

PLC-400P

(Europe,As!a,Afr!ca,M.E.)

Mode)

PLC-400P6

(U.K.)

Mode)

no.

PLC-400PP

(Austra)ia,NewZea)and)

Contents

Safety

fnstructions'''''''''''''''''''''''''''''''''*''*

Principles

And

Functions

The

Liquid

Crysta)

Projector

----.....'''

Specifications

----..---''''''''''--------------------

Description

PLC-400P/PB/PP

..........---...--...--.---

LampReptacement

----------------------''----''-''''15

Mochanica!

Disassemblies

OR)G)NAL

VERS)ON

LCD

Pane)

Replacement

----------

-"--""""""""-

Focus

Adjustments'''''''''''''''''''''''''''''*''''''22

Convergence

Adjustments

............"."--""".""

Service

^nnp

Cieaning

Methods-.""................".."..".""

D-^^

^LU-^UUf-UU

ServfceAdjustments

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

Ref.NO.

PLC-400PB-00

Chassis

Eioctrica)

PanE

Ust

----"..........-'''...'...."

PLC-400PP-00

Cabtnet&Opticai

Parts

List-""'""-""''''""'"'"'51

[CfntemaiBiock

Diagrams

'...'-..--..----'-----'----'-56

[C'Tr

Package

Outiine

Drawings.....-....---'---'--'-'-'-'

TroubieshootingChart

'''---''''''''--''''--'''''''''-'64

Parts

Address

List'""'"'"""'"'"'''""'"""'68

Tafte

Notice

"Schematic

Diagrams"

--..-"------"-"

-----

Vottage

and

Wave^rme

--'---'-'''-'''''-'---'--'''''-'

Scnematic

Diagrams

..--'---'-'''''''''-''''---''--'-'

Bfock

Diagr^ns

Distribution

Diagrams

-------'-'-'''-----100

Component

and

Testpoint

Locations

----------'-''---'-'----104

PRODUCT

CODE

P4BA

(PLC-400P-00)

P4BB

(PLC-400PB-00)

P4BC

(PLC-400PP-00)

;

112201700

;

112201701

112201702

REFERENCE

NO.

SM525027

SAFETY

PRECAUTIONS

WARNING:

The

chassis

this

projector

isolated

(COLD)

from

line

using

the

converter

transformer.

Primary

side

the

converter

transformer

and

tamp

power

supply

unit

circuit

connected

the

line

and

hot,

which

hot

circuit

identified

wtth

the

iine

the

schematic

diagram.

For

continued

product

safety

and

protection

personnel

injury,

servicing

shouid

made

wtth

quailed

personnel.

The

following

precautions

must

observed:

isolation

transformer

shoufd

connected

the

power

!ino

between

the

receiver

and

the

iine

before

any

service

performed

the

projector.

Compiy

with

a)!

caution

and

safety

rotated

notes

provided

the

cabinet

back,

cabinet

bottom,

inside

the

cabinet

the

chassis.

When

replacing

chassis

the

cabinet,

atways

certain

that

aii

the

protective

devices

are

installed

property,

such

control

knobs,

adjustment

covers

shields

and

barriers.

NOT

OPERATE

THiS

PROJECTOR

WITHOUT

THE

PROTECTIVE

SHIELD

POSJTiON

AND

PROPERLY

SECURED.

Before

replacing

the

cabinet

cover,

thoroughly

inspect

the

inside

the

cabinet

see

that

strayparts

toots

nave

been

fefE

inside.

Before

returning

any

projector

the

customer,

the

service

personnef

must

perform

the

following

safety

checks

and

sure

that

compieteiy

safe

operate

without

danger

electrical

shock.

PRODUCT

SAFETY

NOTICE

Product

safety

should

considered

when

component

reptacement

made

any

area

the

projector.

Compo-

nents

indicated

marf(

(

)

the

parts

Mst

and

tne

schematic

diagram

designate

components

which

safety

can

special

significance,

is.

therefore,

particutariy

recommended

that

the

replacement

these

parts

must

made

exactly

the

same

parts-

SERVICE

PERSONNEL

——

WARNING

Eye

Damage

May

Resutt

From

Diroctiy

Viewing

The

Ught

Produced

The

Lamp

Used

This

Equtpment.

A!ways

Turn

Off

Lamp

Before

Opentng

Cover.

Uttravio)et

Radiation

Eye

Protection

Required

During

This

Servicing."

Never

turn

the

power

without

the

iamp

avoid

etectric-

shock

damage

the

devices

since

the

stabilizer

generates

high

voitages(10kV

15kV)

its

start.

Since

the

iamp

very

high

temperature

during

units

operation

replacement

the

iamp

should

done

least

one

hour

after

the

power

has

been

turned

off,

aitow

the

iamp

cooi

off.

—2—

[

PRINCIPLES

AND

FUNCTIONS

O^THE:L!QUtDiC^S^gi

PROJECTOR

]

Fundamentat

Princip)es

the

Liquid

Crysta)

Projector

The

white

tight

emitted

from

the

iight

source

separated

into

red

(R),

green

(G)

and

biue

(B)

tight

components

the

dichroic

mirror.

Each

component

projected

onto

one

the

three

liquid

crystal

panefs.

The

three

crystal

iiqufd

panels

are

respoctivefy

driven

Ft,

and

primary

co)or

signals.

The

R/G/B

images

are

reproduced

the

shutter

operation

these

panefs.

The

and

pictures

dispfayed

the

three

paneis

are

again

combined

the

dichroic

mirror

into

one

and

projected

onto

the

screen.

[^^]

shows

the

fundamental

phncipfes

the

liquid

crysta)

projector.

Uttraviotet

and

infrared

rays

are

tittered

out

the

cut

fitter

and

cotd

fitter

from

the

!)ght

beams

produced

the

metaf

haiide

iamp

which

the

iight

source.

Thus

unneeded

fight

components

the

projected

image

are

efiminatod

and

the

liquid

crystal

panei

protected

from

the

iight

and

heat

the

famp.

The

uftravioiet

rays

harmfu!

the

operator

are

atso

cut

out.

The

tight

beams

now

consist

only

visibte

t^ght

components

which

enter

the

condenser

iens,

creating

para!!ei

iight

beams

prevent

tight

from

scattering,

improving

luminous

efficiency.

The

tight

beams

are

divided

into

three

primary

cotors

(red,

green

and

btue)

the

dichroic

mirror.

The

dichroic

mirror

fitter

constructed

multiple

dielectric

layers,

each

having

different

refractive

index.

The

tayers

are

formed

g!ass

reflect

fight

specific

wavelength

and

transmit

others.

Each

the

divided

and

parafiei

tight

beams

now

enter

its

respective

liquid

crystal

pane),

where

they

are

intensity-

modulated

R/G/B

cotor

signats.

The

images

formed

and

panots

are

again

combined

the

dichroic

mirror

end

reflected

the

fuii

reflection

mirror

before

being

projected

the

screen

the

projection

tens.

Projection

!eM

D!chro!c

m!rror

Potartztng

gtaM

Put)

reftectton

nthror

LiquM

^._

cryettt

panai

Met<t

hx)Me

)*mp

Lamp

Power

Source

yhe

tarn

power

source

smp

and

control

the

power

supply

Mmp

maintain

and

stabilize

the

tamp

K^tscharge,

keeptng

)Mumfhat!ort

con-

Mant^eve).__________^

(j^^tshowsthe

tamp

power

source

b)ock

diagram.

and

iamp

illumination

methods

are

avaiiabfe.

With

illumination,

luminous

substances

are

at-

tracted

the

negative

electrode,

causing

discharge

accumulate

toward

it.

Another

drawback

greater

power

ioss

which

lessens

efficiency.

Therefore

iiiumination

often

used.

The

iamp

driver

circuit

DC-

converter

used

for

iiiumination

the

iamp.

Designed

centre)

power

supp)y

the

tamp,

the

chopper

circuit

consists

switching

transistors,

choke

coits,

diodes,

etc.

generates

intermittent

current

switching

the

switching

transistor

and

off.

The

longer

the

time,

does

the

supplied

power

increase,

white

the

ionger

the

Off

time,

does

the

supplied

power

!ower.

Therefore,

varying

the

on/off

time,

power

supply

can

controlled.

The

chopper

circuit

varies

the

switching

transistor

on/off

time

maintain

the

power

suppfy

the

tamp

constant

fevei.

The

high-

voitage

puise

generator

tights

the

tamp.

The

metat

hatide

tamp

emits

tight

through

arc

discharge.

initiate

arc

discharge,

dielectric

breakdown

must

occur

between

the

tamp

electrodes.

The

high

voltage

putse

generator

generates

and

applies

high

vottage

putses

with

peak

values

about

20kV

between

the

lamp's

positive

and

negative

electrodes

order

generate

g!ow

discharge.

This

turn

resutts

dielectric

break-

down

between

the

efoctrodos,

causing

shift

from

gtow

discharge

arc

discharge.

—4—

Meta)

HaHde

Lamp

The

meta)

hatide

tamp

consists

argon,

mercury

and

hatogen

compounds

enclosed

its

fuminous

tube.

j^Oshows

the

spectra!

distribution

this

iamp.

the

center

arc

discharge,

haJogen

compounds

are

dissociated

into

metai

atoms

and

haiogen

atoms,

the

meta)

being

excited

that

emits

metai

specific

spectrum.

the

periphery

the

arc

discharge,

meta!

atoms

and

haiogen

atoms

are

bonded

again.

Repeating

this

cyclic

process

causes

iight

generated.

The

meta)

haiide

tamp

features

higher

[uminous

efficiency

than

haiogen

and

xenon

iamps.

Depending

the

compounds

enclosed

the

tamp

tube,

different

iight

spectra

are

generated.

Thts

atso

enaMes

natura)

white

fight

produced

the

projector

tight

source.

Metai

haiide

tamps

are

mainstream

product

the

tight

source

high-

and

middle-

grade

liquid

crystal

projectors.

After

projector

turn

on,

minutes

are

required

before

the

tight

output

stabilizes.

After

the

projector

turned

off,

the

cooling

fan

operates

for

seconds

coot

down

the

tarnp

and

reduce

gas

pressure

inside

the

tamp.

During

this

"cooling

down"

period,

the

projector

cannot

turned

on.

—5

Svstem

Contro)

ensure

correct

and

safe

tamp

illumination,

[amp

rumination

conditions

are

monitored

detect

abnormal

temperatures

the

iamp

power

source

and

control

the

cooiing

fan.

the

metai

haiide

iamp

used,

vottage

high

20kV

applied

striking

initiate

discharge.

Once

discharge

commences,

vott-

age

stabiles

about

85V.

addition,

the

iamp

aiso

generates

heat,

increasing

projector

interior

temperature.

cooiing

fan

prevents

temperature

increases.

Cooling

fan

operation

con-

trolled

the

CPU

which

monitors

the

iamp

power

source

determine

iamp

illumination

conditions.

Correct

iamp

rumination

makes

the

tamp

power

source

send

"L"

signal

the

CPU

(tC801).

the

tamp

does

not

!ight

suddenly

extinguished,

the

"H"

signal

sent

the

CPU

(!C801).

When

the

tamp

tights

after

the

projector

turned

on,

the

CPU

(tC801)

starts

chocking

the

input

seconds

after

projector

turn-

on.

the

"H"

signal

received

for

duration

second,

the

CPU

(tC801)

evaluates

this

indications

abnormal

condition,

turning

the

power

off

automatically

and

initiating

minute

thermal

protection.

While

protection

mode,

at!

set

keys

and

remote

control

keys

including

the

power

on/off

switch

witt

not

respond.

The

cooiing

fan

witi

continue

operate

protection

mode.

The

tamp

power

source

temperature

atso

rises

due

control

toss

the

chopper

(Q701)

and

tamp

driver

(Q702-

Q705).

This

makes

necessary

atso

coot

down

the

lamp

power

source

with

the

cooiing

fan,

therefore

the

tamp

power

source

temperature

also

monitored,

the

temperature

power

source

heat

sink

reaches

approximately

°C

"H"

signat

sent

CPU

(tC801)

("L"

signal

for

normal

temperatures).

"H"

signal

for

second

duration

considered

abnormal.

The

projector

automatically

turns

off

and

the

minute

protection

initiated.

Att

set

keys

and

remote

controi

keys

wiii

not

respond

protection

mode,

but

the

cooling

fan

witt

continue

operate.

During

tamp

fighting,

the

discharge

induced

heat

increases

gas

pressure

inside

the

tamp.

gas

pres-

sure

remains

high

after

tamp

turn

off,

the

tamp

cannot

turned

again

immediateiy.

The

minute

protec-

tion

initiated

again

after

turning

off

the

tamp

(turning

off

the

projector),

disabting

ait

set

keys

and

remote

control

keys

for

that

period.

The

cooting

fan

wiit

continue

operate

until

the

gas

pressure

returns

satisfactory

tevet.

The

green

LED

indicates

tamp

monitor

operation

to)

tows:

___

^NBy^

EBMshows

tamp

monitor

flow

chart.

—6—

projector

temperature

monitored,

and

power

wiii

turn

off

automatically

the

temperature

rises

beyond

normai.

The

cooiing

fan

wi))

operate

untii

the

temper-

ature

returns

normat.

This

prevents

projector

compo-

nents

from

being

damaged

excessive

heat.

the

tamp

generates

heat

and

heat

waves

discharge,

the

temperatures

the

)amp

itself,

we))

the

poiarizing

g)ass,

)iquid

crysta)

pane)s

and

other

optica)

components

wiif

increase.

Fan-

induced

cooiing

essential.

The

temperature

the

iamp's

luminous

giass

surface

must

iower

than

approximately

950

the

reflector

internal

surface

temperature

must

iower

than

350

and

the

poiarizing

glass

and

liquid

crystal

pane)

surface

temperatures

tower

than

Temperatures

may

exceed

these

ranges

the

fan

does

not

operate

the

projector

operated

poor

ventilation.

the

projector

used

ambient

temper-

atures

exceeding

°C

the

above-

mentioned

temper-

atures

wiii

aiso

exceed

permissibie

ranges,

damaging

optical

components

such

the

poiarizing

gtass

and

tiquid

crystal

panels.

order

prevent

damage

resulting

from

excessive

heat.

temperature

sensors

are

located

the

peripheries

the

polarizing

glass

and

tiquid

crystal

pane!

monitor

temperatures.

The

temperature

sensor

positioned

near

the

iamp

has

applicable

temperature

range

80"

°C

with

hysteresis

(sensor

activates

80"

and

resets

its

main

purpose

protect

the

tamp.

The

temperature

sensor

positioned

dose

the

iiquid

crystal

panets

has

appticabte

temperature

range

2.5

with

hysteresis

moans

the

sensor

activates

2.5

°C

and

resets

48"

2.5

its

main

purpose

protect

the

iiquid

crysta!

paneis.

Once

power

input,

the

CPU

(tC801)

performs

input

chock

regardless

the

power

on/off

setting,

the

temperature

the

tamp

periphery

reaches

approximatety

the

temperature

the

periphery

the

iiquid

crystal

paneis

reaches

approximatefy

°C

"L"

signai

generated

and

sent

the

CPU.

the

"L"

signai

continuous

for

second,

the

CPU

sees

abnormal

condition,

automatically

turning

off

the

projector

and

turning

off

the

iamp,

and

continues

cooiing

fan

operation

untii

the

temperature

iowers.

this

protection

mode,

a)i

set

keys

and

remote

control

keys

not

respond.

The

CPU

checks

input

during

coofing

wo)).

The

temperature

sensor

the

periphery

the

iamp

wiii

reset

when

the

temper-

ature

goes

betow

°C

sending

"H"

signal,

similar

fashion,

the

iiquid

crystal

panei

temperature

sensor

wiii

reset

betow

and

output

"H"

signal.

The

CPU

then

judges

normai

temperature

and

cuts

cooling

fan

operation.

The

red

LED

indicates

temperature

monitor

operation

foiiows:

shows

the

temperature

monitor

f!ow

chart.

The

iamp

wiii

require

repiacement

during

operation

some

point.

The

yeiiow

LED

indicator

wiii

tight

after

1,000

hours

use

and

recommend

repiacement.

Usage

time

wiii

stored

non

voiatite

memory

(iC807)

the

CPU

(iC801).

Even

when

disconnected,

this

information

retained.

After

iamp

repfacement,

pressing

the

Reset

switch

the

bottom

the

projector

wiii

return

iamp

usage

time

The

Reset

switch

activates

oniy

when

power

on.

When

this

switch

pressed,

"RESET"

indication

wiii

appear

onscreen.

the

"RESET"

indication

cannot

recognized

immediately

after

power

on,

the

Reset

switch

can

operated

oniy

after

the

iamp

has

stabilized

("A

MOMENT!"

goes

off).

Make

sure

confirm

"RESET."

The

Reset

switch

shouid

onfy

operated

iamp

repiacement.

For

details,

refer

LAMP

REPLACEMENT

procedure

—7

—8

—9

CPU

(!C80'))p*'torm<

'nput

check

tfp)n

(tnput

port)

onew

th<

projector

conntetwdLtO

outtwt,

ftgardtMt

power

on^dff

<Wut.

T''

ttanat

conttnuM

;j^

mon!ioi^MJ

p!n

fort

MooTTt^Me^

CPU

a$i<ct<

abnortn^

oo^tMor^

^itf^mpwrttu

rw*

around

t^^^^^.

ttqu^erytta)

pNM)t

rt^^o^

^^5S^

rMpectt^ty.thfO^fMdt^n

"L*

N)ai<)

to^jMa."

;

^:;<^

^-'!^^

-'--^--

^3rR^

trippNd,

the

'temperatuF'^^t'^E

?t^rdund

the

famp

and?!qu!d

Ofyiitta)

^pane!trewetretptctfvwfyt^

^ttmpwraturM

ba)ow73'C^nd48'C

aend!ng

'H''

tight!.

abnonna)

condttfon

detected

throuoh

input

chactf

p)n

33^h<

CPtLi^

automtt!caHy

turn<

the

pfojecfor

offthc!

operatw*

the

coo)tng

f<n

unti)

tht

[

tamperatMre

goat

down.

A!!

«t

kwyw

and

remotw

contFo)

ttwya

w))t

not

respond.

TECHN)CAL

SPEC)F)CAT)ONS

"^L

Portab)e

LCD

Projector

158

430

385

23.2

)bs

(10.5

kg)

1.3"

TFT

Active

Matrix

type

(Thin

Fi)m

Transistor)

544.410(181.470

x3)

coiour

system

(PAL,

SECAM,

NTSC4.43

and

NTSC)

381

(30

150

inch)

Adjustabie

100:1

550

tines

f2.8

3.2

tens

with

Manua)

zoom

and

focus

51.8

1.5m-6.0m

MetaiHatide,

195

watt

Dichroic

mirror

system

PHONO

Type

(Video,

Audio

and

DiN

(S-Video)

PHONO

Type

PHONO

Type

and

Stereo

Audio

Output

Jack

and

Wired

Remote

Jack

)NT.

SP.

Monaurai,

watt

RMS

(T.H.D.

10%)

220-240VAC,50/60Hz

260

Watts

5^-35^

-10^C-60^C_____

AA,

UM3

R06

type

Remote

Contro!

Unit,

R/C

Cabte

(1.5

m),

Power

Supply

Cord,

Lens

Cover

and

Owner's

instruction

Manua)

Table of contents

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