Sanyo VHR-279E Manual de usuario

FILE

NO.

SERVICE

MANUAL

Video

Cassette

Recorder

VHR-279E

(Product

Code

143

179

02)

VHR-289E

(Product

Code

143

179

03)

(U.K.)

VHR-269SP

(Product

Code

143 179

05)

VHR-279SP

(Product

Code

143 179

04)

(Spain)

(VHR-279E,

VHR-269SP,

VHR-279SP,

VHS

R-2

VHR-249EX,

VHR-279EV

(Product

Code

143 179

12)

(Spain)

CONTENTS

(Portugal)

DISASSEMBLY

........cccecccccecssceerecseesssseceeessenenessarenseeteeeeseees

ELECTRICAL

ADJUSTMENT

cccsesssssssssesssssssssssseeseseeeeense

R-2

TEST

POINTS

FOR

TAPE

PATH

ADJUSTMENT

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

PARTS

LIST

(Product

Code

143

179

22)

MECHANISM

PARTS

..cccsssscsssscsssssssscsssssseosssssssccccsssssnsssseees

(Europe)

CABINET

CHASSIS

PARTS

.......cccseceseesereseseeseeseneneneesee

Please

see

other

materials

with

Reference

ELECTRICAL

PARTS

ecazccssecccsciecicstecsheess

cavenesacseevanestesaaaasee

number

given

table

below.

ACCESSORIES

sii.

ccsecciccdzcchedi

Seavidaceceivasscodecentenonserdeseessns

PACKING

MATERIALS.

..........::cccccssececeeesereeeeesceeauseseneneeenens

Materials

Model

No.

Reference

No.

CIRCUIT

DIAGRAMS

(Refer

the

separate

volume)

Mechanism

MM531683

Manual

Mechanism

PRODUCT

SAFETY

NOTICE

The

components

designated

symbol

(/\)

this

schematic

diagram

designates

components

whose

value

are

special

significance

product

safety.

Should

any

component

designated

symbol

need

replaced,

use

only

the

part

designated

the

parts

List.

not

deviate

from

the

resistance,

wattage,

and

voltage

ratings

shown.

NOTE:

Parts

order

must

contain

model

number,

part

number,

and

description.

Substitute

parts

may

supplied

the

service

parts.

N.S.P.

Not

available

service

parts.

Design

and

specifications

are

subject

change

without

notice.

SE2L/E2,

SE2/SP2,

SP,

EX3,

EV3

REFERENCE

No.SM5310003

SELF-DIAGNOSIS

DISPLAY

Mechanism

Mode

Display

Head

Output

Drop

Warning

Display

This

unit

displays

the

diagnosis

contents

abnormalities

and

the

mechanism

mode

its

display

panel

2-digit

numbers.

When

the

head

playback

output

has

dropped,

the

"L"

sign

will

blinked.

These

display

shows

the

outline

the

problems.

Use

reference

when

servicing

the

unit.

Self-Diagnosis

Contents

and

Mechanism

Mode

Display

When

the

STOP

button

the

remote

control

pressed

for

about

seconds

continuously,

the

self-diagnosis

number

will

displayed

the

reception

channel

display

the

display

panel

and

number

indicating

the

failed

mechanism

mode

(changed

mode

when

being

shifted)

the

tape

counter

"seconds"

display

for

seconds

each.

During

self-diagnosis

display,

displays

other

than

the

diagnosis

number/mechanism

mode

number

will

turned

off

and

when

displays

end,

the

normal

display

will

returned

automatically.

Refer

"Self-Diagnosis

Contents"

for

the

self-diagnosis

numbers

and

the

"Mechanism

Mode

Display

Contents"

for

the

mechanism

mode

numbers.

When

the

"0"

button

the

remote

control

unit

pressed

during

display,

and

clearing

the

self-diagnosis

display

and

mechanism

mode

display.

Display

panel

Self-Diagnosis

number

Mechanism

mode

number

(Reception

channel

display)

(Tape

counter

"Seconds"

display)

Self-Diagnosis

Contents

;

Mechanism

Operations

and

Problem

Main

Possible

Cause

State

After

Occurrence

There

abnormality

the

mechanism.

The

cylinder

motor

does

not

rotate.

The

cylinder

motor

faulty.

The

control

the

cylinder

motor

faulty.

The

tape

winds

around

the

cylinder.

The

take-up

reel

supply

reel

does

Thetake-up

reel

orsupply

reel

caught.

not

rotate.

The

reel

belt

faulty.

‘|

The

reel

torque

has

decreased.

The

capstan

motor

faulty.

The

control

the

capstan

motor

faulty.

the

power

goes

off.

the

power

goes

off.

The

capstan

motor

does

not

rotate.

the

power

goes

off.

Shifts

the

STANDBY

mode,

and

Shifts

the

STANDBY

mode,

and

Shifts

the

STANDBY

mode,

and

Error

the

operations

the

tape

Icading

mechanism.

Foreign

particles

the

tape

load-

ing

mechanism.’

The

tape

end

sensor

faulty.

The

reel

brake

the

tape

cassette

has

not

been

released.

The

tape

guide

caught.

The

motor

faulty.

The

control

the

motor

faulty.

The

tape

cannot

loaded

with

the

cassette

inserted.

(But

unloading

can

performed.)

and

the

power

goes

off.

Tape

and

unloading

cannot

performed

with

the

cassette

in-

serted.

Unloads,

shifts

the

INITIAL

mode,

The

power

forcibly

turned

off

with

the

mechanism

its

current

position.

Problem

Main

Possible

Cause

Mechanism

Operations

and

State

After

Occurrence

Front

unloading

cannot

performed

when

ejecting

the

cassette.

(Front

can

performed.)

The

cassette

drive

mechanism

faulty.

The

front

door

caught.

Front

loads

and

shifts

the

STOP

INITIAL

mode.

When

the

power

switch

tumed

before

eject

operations:

Shifts

the

STOP

mode.

When

the

power

switch

turned

off

before

eject

operations:

Shifts

the

INITIAL

mode

and

the

power

goes

off.

—

Front

and

front

unloading

can-

not

performed

when

ejecting

the

cassette.

The

tape

cassette

caught

the

cassette

drive

mechanism.

The

main

cam

and

front

rack

gear

the

front

mechanism

have

not

engaged

properly.

The

gears

the

front

drive

erly.

mechanism

have

not

engaged

prop-

The

power

forcibly

turned

off

with

the

mechanism

its

current

position.

The

mechanism

becomes

(RE-

VIEW)

while

moving

from

(IDLER),

(STILL),

(BRAKE),

and

(STOP).

The

mechanism

mode

switch

con-

The

power

forcibly

turned

off

with

the

mechanism

its

current

position.

The

mechanism

becomes

(INITIAL)

while

moving

from

(REVIEW),

(IDLER),

(STILL),

(BRAKE),

and

(STOP).

The

mechanism

mode

switch

tact

faulty.

Carries

out

tape

take-up

operations,

shifts

the

STANDBY

mode,

and

the.

power

goes

off.

The

capstan

motor

does

not

rotate

and

cassette

tape

eject

when

cas-

sette

tape

insert.

The

cylinder

motor

does

not

rotate

and

cassette

tape

eject

when

cas-

sette

tape

insert.

The

supply

reel

does

not

rotate

and

cassette

tape

eject

when

tape

un-

tact

faulty.

con-

The

capstan

motor

faulty.

The

control

the

capstan

motor

faulty.

The

cylinder

motor

faulty.

The

control

the

cylinder

motor

faulty.

The

supply

reel

caught.

The

reel

belt

faulty.

The

reel

torque

has

decreased.

Shifts

the

EJECT

mode.

Protect

cassette

tape.

Shifts

the

EJECT

mode.

Protect

cassette

tape.

Shifts

the

EJECT

mode.

Protect

cassette

tape.

Note:

For

details

mechanism

operations

corresponding

the

mechanism

positions

the

self-diagnosis

numbers

and

above,

refer

the

separate

volume

the

mechanism

manual.

These

manual

reference

numbers

are

shown

the

cover.

Mechanism

Mode

Display

Contents

Mechanism

Mode

No.

Mechanism

Mode

No.

Mechanism

Mode

CASSETTE

OUT

STANDBY

STOP

STILL

REC-PAUSE

AUDIO

DUBBING-PAUSE

FRAME

ADVANCE

AUDIO

DUBBING

SPEED

PLAY

CUE

REVIEW

FAST

FORWARD

REWIND

VIDEO

INSERT

VIDEO

INSERT-PAUSE

AUDIO/VIDEO

INSERT

REVERSE

SPEED

PLAY

OTHERS

Head

Output

Drop

Warning

Display

When

the

STOP

button

the

remote

control

pressed

for

seconds

continuously

seconds

after

play

starts,

"L"

will

displayed

blinking

the

first

digit

the

minutes

position

the

tape

counter

when

the

head

output

lower

than

the

specified

value

indicate

abnormality.

—

The

cause

the

abnormality

may

due

drop

the

playback

output

caused

drop

the

efficiency

the

cassette

used

head

clogging.

Refer

"Head

Playback

Output

Voltage

Check"

means

judge

the

abnormality.

Display.

panel

Head

output

drop

warning

display

(Tape

counter

"1st

digit

Minutes."

position)

Head

playback

output

voltage

check

Cassette

Used

Cassette

with

normal

playback

output

Recorded

cassette

(with

tabs)

Rental

cassette

(without

tabs)

Warning

Display

"L"

blinking

"L"

blinking

"L"

blinking

Envelope

Detection

Output

Voltage

Envelope

detec-

tion

output

(IC301

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP

183:

see

Fig.

2-1-1)

Envelope

detec-

tion

output

(IC301

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP

183:

see

Fig.

2-1-1)

Envelope

detec-

tion

output

(1C301

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP

183:

see

Fig.

2-1-1)

Envelope

detec-

tion

output

(1C301

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP183:

see

Fig.

2-1-1)

CH-1

CH-2

than

-¥

than

Main

Cause

When

the

output

voltage

differ-

ence

the

two

channels

0.5

0.95V

The

video

heads

both

are

normal

When

the

output

voltage

differ-

ence

the

two

channels

than

0.95V

Tracking

adjustment

has

not

been

performed

accurately

One

video

head

clogged

One

video

head

has

worn

out

When

the

average

outputvolt-

age

the

two

channels

less

than

0.5V

Tracking

adjustment

has

not

been

performed

accurately

Both

video

heads

are

clogged

Both

video

heads

have

worn

out

When

the

output

voltage

dif-

ference

the

two

channels

than

0.95V

Tracking

adjustment

has

not

been

performed

accurately

One

video

head

clogged

One

video

head

has

worn

out

Some

rental

cassettes

may

have

extremely

low

video

playback

outputs

even

when

both

video

heads

are

normal.

the

average

output

voltage

the

two

heads

may

less

than

0.5V

for

some,

warning

displays

will

shown.

DISASSEMBLY

1-1.

REMOVAL

CABINET,

MECHANISM

UNIT,

AND

MAIN

BOARD

REMOVING

THE

CABINET

PARTS

(Fig.

1-1-1)

Remove

the

cabinet

removing

the

four

screws

(1).

Remove

the

front

panel

removing

the

locks

the

clamps

(A)

using

screwdriver,

etc.

and

slightly

rotating

the

bottom

part

the

direction

the

arrow.

Notes:

Electrical

adjustments

for

the

this

model

can

performed

with

only

the

cabinet

removed.

M-SE2V/E2-1

REMOVING

THE

MECHANISM

MAIN

UNIT

AND

THE

CP-1

PWB

ASSEMBLY

(Fig.

1-1-2

and

1-1-3)

After

removing

the

cabinet

parts,

remove

the

mechanism

unit

and

the

CP-1

PWB

assembly

connected

follows.

Remove

the

five

screws

(2)

shown

Fig.

1-1-2.

Remove

the

two

screws

(3)

the

CP-1

board,

and

then

disconnect

the

bottom

cover.

Remove

the

two

screws

(4)

and

two

screws

(5)

the

mechanism

unit.

The

two

screws

(5)

the

cassette

tray

can

removed

easily

pushing

the

lid

opener

lever

the

arrow

direction

remove

the

lock

shown

the

enlarge

view.

Lift

the

whole

mechanism

unit

and

main

board

(CP-1

PWB

assembly),

and

shown

Fig.

1-1-3,

that

they

can

removed

from

the

chassis.

Fig.

1-1-1

$14)

Terminal

Board

M-SE2L/E2-2

Cassette

Tray

Lid

Opener

Lever

M-SE2L/E2-3

1-2.

TEMPORARILY

SETTING

AND

CONNECTING

CP-1

PWB

ASSEMBLY

The

following

example

how

place

and

connect

the

main

board

without

jig,

when

repairing

the

CP-1

PWB

assembly.

Place

the

mechanism

unit

and

main

board

side

down

Operete

the

unit

using

the

buttons

CP-1

PWB

the

whole

flat

surface

with

foil

side

the

main

board

remote

control.

facing

up.

hess

CP-1

PWB

Assembly

side)

Screws

(6)

Terminal

Board

™A

rel

Cassette

Compartment

Main

Unit

TM-2

PWB

1-3.

INSTALLATION

THE

FRONT

PANEL

When

installing

the

front

panel

the

chassis

after

repaires

and

adjustments.

Pressing

down

the

door

opener

lever

the

mechanism

Note:

Opened

cassette

door

position

does

not

install

the

front

main

unit.

panel

the

chassis.

Setthe

cassette

door

half-opened

state

shown

Fig.

1-1-5,

and

install

the

front

panel

the

chassis.

M-SE2U/E2-5

Jutted

part

Cassette

Hold

Front

Panel

Door

Opener

Lever

Cassette

Door

(Position

Cassette

Door

(Position

Fig.

1-1-5

Note:

Before

assembling

the

mechanism

unit

and

the

CP-1

board,

check

the

eject

mode

positioning

marks

shown

Fig.

1-1-6

and

Fig.

1-1-7.

Crescent

slide

L-SE2VE

Tuner

CP-1

PWB

Assembly

(Tuner/IF/RF

Conv.)

TM-2

PWB

for

VHR-289E

TM-1

PWB

for

VHR-289E

ELECTRICAL

ADJUSTMENT

VCR

PRESETTING

This

VCR

need

three

basic

presetting

using

the

menus

displayed

on-screen.

After

all

connection

have

been

made,

then

steps

preset

the

VCR.

The

three

presetting

steps

will

displayed

sequence

screen.

The

setting

are

entered

with

the

remote

control.

Turn

the

VCR

Adjusting

the

receiver

the

video

channel:

The

AUTO

SETUP

screen

will

appear.

When

the

video

channel

has

been

preset,

press

the

button

the

remote

control.

;

Country

selection:

Using

the

numeric

button,

select

the

country

use.

Language

selection:

When

the

desired

language

has

been

select,

press

the

MENU/TV

button

directly

before

prevent

auto

tuning

will

start.

When

steps

have

been

finish,

ready

operate

the

all

operating

mode.

2-1.

SERVO

CIRCUIT

ADJUSTMENT

These

adjustments

should

done

upon

completion

the

tape

transport

adjustments.

the

tape

transport

adjustments

(except

the

tilt

adjustment)

are

done

after

these

adjustments,

the

procedures

again

section

2-1-3,

"Switching

position

adj."

When

acassette

tape

loaded,

auto-tracking

will

set

immediately

after

starting

the

first

playback.

this

will

daviate

the

tracking

center

set,

sure

press

the

channel

buttons

And

once

directly

after

starting

playback

prevent

auto-tracking

from

being

set.

2-1-1.

TEST

EQUIPMENT

AND

STANDARDS

REQUIRED

Vertical

sensitivity

mV/DIV,

external

trigger

Bandwidth

than

MHz

VHJ-0009

VHJ-0023

mode,

monoscope,

KHz

2-1-2.

LOCATION

ADJUSTMENT

POINTS

PIB47000E

TP182

| |

TP183

C3016

(Parts

side)

1C301

CP-1

PWB

(Foil

side)

Fig.

2-1-1

Note:

Set

the

REC/PLAY

SPEED

button

indicator

panel

the

mode.

Start

play

REC

button

Self-recording

means

"Record

any

broadcasting

video

back

display

signal

and

playback

the

just-recorded

portion."

2-1-3.

SWITCHING

POSITION

ADu.

'More

jst

;

(“Within

Within

2-ypereit

Adjusting

—,

secs.

—

SeCS.

period

15secs.

Measuring

Point

Measuring

Equipment}

Adj.

Condition

TP101

Oscilloscope

PLAY

(SP)

mode

(VIDEO

OUT)

Alignment

tape

TP183

VHJ-0009

(RF

SW-P)

(PM-S6)

Fig.

2-1-3

Adj.

Location

Adj.

Value

T=6.5H

£0.5H

REC

button

CHANNEL

(A/¥)

button

‘6.5H+0.5H

PLAY

button

playback

starts,

press

the

REC

button

times

within

seconds

after

the

playback

picture

comes

out.

However,

Front

edge

these

3-push

must

done

within

seconds,

and

last

push

mortem

sytem

must

kept

pressed

for

0.5

seconds.

(Fig.

2-1-3)

Fall

RF.

PULSE

0:00"

appeared

FLD,

and

becomes

the

adjustment

mode.

This

indication

value

changes

automatically,

and

Fig.

2-1-4

6.5

adjustment

done.

When

this

value

stops,

adjust-

ment

value

almost

becomes

6.5

Observe

the

video

output

signal

the

oscilloscope,

2-1-4.

STILL

V-LOCK

ADJ.

triggered

the

fall

down

point

PULSE

(TP183),

; -

: - : -

and

confirm

that

front

edge

V-SYNC

delayed

for

6.5

0.5

from

the

fall

down

point

PULSE.

(Fig.

Picture

Monoscope

pattern

Self-recording

2-1-4)

monitor

(SP

mode)

After

the

adiustment

data

fixed

(it

should

within

STILL

mode

seconds

from

the

adjustment

mode

start),

press

the

PLAY

Adi.

Val

button

than

second.

Then

the

indication

changes

JEOCeuOR

eee

—:-—",

writes

the

data

(delay

quantity)

the

E7PROM.

CHANNEL

buiton

The

minimum

vertical

shake

(If

passes

through

seconds

before

pushing

the

PLAY

button,

the

intake

the

data

isn't

done,

and

finishes

the

Set

the

REC/PLAY

SPEED

button

the

mode.

adjustment

mode.)

Play

back

the

own

recorded

portion

the

tape

and

then

set

Ifitis

notin

6.5

0.5

the

time

the

confirmation

the the

VCR

the

STILL

mode.

above

3.,

make

manual

fine

adjustment

pressing

the

Press

the

CHANNEL

Aor

Whutton

that

the

vertical

shake

CHANNEL

buiton,

and

the

operation

picture

becomes

its

minimum.

2-2.

CIRCUIT

ADJUSTMENT

inthis

model,

the

circuits

the

TUNER,

IF,

and

Note:

The

tuner

dose

not

need

any

adjustments,

because

converter

have

been

made

into

one.

Therefore,

should

one

precise

adjustments

were

down

before

shipment.

circuit

malfunction,

the

whole

unit

must

replaced.

The

adjustments

for

the

(RF

AGC)

circuit

the

tuner

are

described

below.

2-2-1.

TEST

EQUIPMENT

AND

STANDARD

REQUIRED

Monitor

—10—

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